ELTRA OH-900 Service Manual Download Page 1

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Summary of Contents for OH-900

Page 2: ...ls See 4 3 NOTE Servicing should only be done by a person with profession who has mastered the servicing and maintenance of this device as well as having further qualifications especially in the field of electronics and physics We ask the users of this Service Manual to inform us about any possible mistakes We would also appreciate any suggestions for supplements and improvements to this Service M...

Page 3: ...se or drift of the infrared baseline 1 16 1 1 17 Furnace cut off during analysis 1 17 1 1 18 Beeper responding 1 18 1 1 19 Saved data is lost 1 19 1 1 20 The upper electrode becomes dark 1 20 1 1 21 The chopper motor doesn t rotate 1 21 1 1 22 The samples make bubbles 1 22 1 1 23 Spare parts kits 1 23 1 1 24 Unstable current 1 24 1 2 ADJUSTMENTS TEST AND FUNCTION EXPLANATION 2 1 Gas flow controlle...

Page 4: ...ng of the IR ranges 3 11 1 3 12 Adding new IR ranges 3 12 1 3 13 Cleaning the solenoid valves 3 13 1 3 14 Replacing the flow sensor 3 14 1 3 15 Installing an AC power stabilizer 3 15 1 3 16 Replacing the gas pump 3 16 1 3 17 Additional safety features for furnace pneumatics optional 3 17 1 3 18 230V 400 V operation 3 18 1 3 19 Upgrading of analysers with electronic rack for using the new Windows s...

Page 5: ...emp 30 sw 5 rt gr abgeschirmt D50 Bu ch se L ötseite D25 Buchse Lö tseite D15 Buchse Lötseite D 37 Buchse Lötseite 8 2 4 5 1 1 1 0 c m N Hi N Lo GND GND 3 33 zero TC temp 6 9 5 1 D 9 Buchs e Lötsei te Auto zero signal 2 PIN 1 TC Temp Low N output signal High N output signal 4 5 2 2 GND 8 GND 9 TC CELL sample drop 24V AC GND current sense 85cm Motor b l u e b ro w n y e l l o w g re y g re e n o ra...

Page 6: ... 1 0n C6 C4 TP6 41 48 D6 R18 I C2 4 N 3 5 3k3 C2 R 6 ZD1 5 4 00 7 P2 P1 G IRF820 TP8 TP9 N R 32 IRF820 J2 A B 1 R13 R14 R1 5 R19 R20 R21 R2 2 R23 R24 R25 R27 4 00 7 S C5 OP270 1k 10 n 5 00V TP5 1µ C 3 D7 D IRF820 G S D p o l i g e S t i f t l e i s t e a b g e w in ke lt 5 0 5 0 1 7 3 3 1 1 8 3 4 D 9 B u c h s e 1 0 µ 4 7 µ 1 0 µ 4 7 µ 4 7 µ 1 0 0 µ O P 4 7 0 P1 P2 P3 P4 1 2 k 5 W T R 1 T P 3 J 1 ...

Page 7: ...R4 R 7 R8 R9 10k 1 k 8 1k8 T 2 40 07 D1 D2 C1 R2 4148 ZD 33 IC1 R1 0 R1 1 R1 2 1k 10k 1 50k 150k 120k 39k 12k 1 5k 10k 33k 33k 47k 47k 39k R2 6 R1 6 TP7 R1 7 D5 D3 C7 10n 0 1 4 7µ 63V 10n C6 C4 TP6 4148 D6 R1 8 IC 2 4 N3 5 3k3 C2 R 6 ZD 15 4007 P2 P1 G I R F 8 2 0 TP8 TP9 NR 3 2 I RF 8 2 0 J 2 A B 1 R1 3 R1 4 R1 5 R1 9 R2 0 R2 1 R2 2 R2 3 R2 4 R2 5 R2 7 4007 S C5 O P270 1k 10n 5 0 0V TP5 1 µ C 3 D...

Page 8: ...2000 0 1 8 60250 60525 60552 60552 upwards downwards 60500 silver 60500 nature 60234 60525 60513 60522 60236 60566 60500 blue 72010 2 5bar 60566 60500 green 60500 blue L 3cm 60531 60566 From end of the year 2007 the ON OH 900 and ONH 2000 are equipped with the new pneumatics ...

Page 9: ...ding to the condition you found Asking for detectors preamplifiers and boards without following this diagram is useless P1 06421 IR13 I R 1 3 0 6 4 2 0 1 1 1 2 Check the IR source voltage see Check the chopper For this remove the IR Path see Ceck the position of the IR sources see Menu Cal displays Replace the power supply see IR Source is defective see Is the rectifier warm yes no yes Feel the re...

Page 10: ... of only 1 Ohm while defective ones have a much higher or unmeasurable resistance CAUTION When setting new IR sources CO2 can be produced during the first warming up Therefore all points of the adjustment instructions see 2 3 should be carefully followed through If the rectifier 1 is warm then check if the chopper motor is at a standstill To do this an IR path must be unscrewed Through the bore ho...

Page 11: ...ght baseline by using the jumper and trimmer see 2 12 check the resistance of the thermistors Unplug the connector of the TC cell and open the metal block of the TC cell Connect an ohmmeter across each thermistor don t open any connection The expected reading should be approximately 5 6 KOhm In case you should measure more than 14 KOhm across one specific thermistor then that thermistor is faulty ...

Page 12: ...e e 2 1 Z e ro L o w e r H ig h e r H ig h e r o k Y e s o k a b o u t 1 2 V D C o n T P 4 M e a s u r e a t l e a s t 2 0 V D C o n T P 5 w h e n n o flo w t h a n 0 6 V D C on T P 1 m u c h h ig h er o n T P 2 z e r o o r Z e ro A d ju s t th e f lo w s e e 2 1 N o a d ju s ta b le fl o w I s t h e 12VDC t h a n 1 0 0 V o lta g e s C h a n g e th e c h e m ic a ls T h e g a s f lo w is b l o c k...

Page 13: ...d be higher than 50 mbar If it is not check the tubes from furnace to flow controller If the vacuum is higher than 50 mbar check the tubes following the flow controller Check the complete tubing from the furnace outlet up to the analyser outlet Otherwise change the flow controller Caution It has happened several times already that the outlet of the furnace was blocked by silicon grease Due to an e...

Page 14: ...he automatic base line control regulates the zero signal of the high nitrogen gain stage Only the high channel zero value appears on the display If the zero value of the low nitrogen hydrogen channel is out of range the electronic board cannot control this signal to zero In this case check the high nitrogen hydrogen signal with If the signal of the high channel is higher than 0 4V the low channel ...

Page 15: ...n the comparator level the analyser stops and calculates the result But this result may be inaccurate because the peak wasn t completely recorded With you enter the menu for setting the comparator level The standard values for sensitive channels are 250 to 300 for the low channel and 50 to 100 for the high channel Before increasing the values check the following Thermostabilisation Flow rates Blan...

Page 16: ...an the furnace Use a gas precleaning furnace filled with copper Connect a computer to watch the blank value peak and start an analysis without any sample In some cases a small air volume remains in the threads under the lower electrode Screw the lower electrode out and fill a small amount graphite powder in Screw the electrode in Repeat this procedure until it needs some force to screw the electro...

Page 17: ... cause erratic results Insufficient flow rates Wrong or highly inconsistent blank value of the carrier gas Damaged electrodes Bad contact see 1 24 Check the electrodes and the flow rates first Delete the blank value as follows Enter the channel number as required Start analysis To abort the blank value analysis press Run five analyses cycles without sample by entering 1000 mg manually The blank va...

Page 18: ... 2 5 NO Check the DC voltage between TP2 and TP3 of the TH 61 See 2 5 Adjust around 5 25VDC See 2 5 Check the cable connecting NR32 to TH 61 See 1 8 Check the 13 Pin plug of the TH61 See 1 8 Remove the plastic cover and check the cable connections Check the wiring see 4 2 Check the 13 Pin plug of the TH61 See 1 8 Remove the plastic cover and check the cable connections Is the voltage on the capaci...

Page 19: ...ed or one of the connections 3 could be disconnected A look inside the plug 4 is recommended 2 3 4 1 14 2 1 rt sw sw 1 2 3 6 4 3 4 8 ge gn ge gn sw sw 2 15 3 16 25 22 bl bl 1 5 1 3 5 7 9 10 11 12 1 3 gn br Temperature sensor 200 VDC as long as the LED is on No voltage as long as the LED is OFF Heaters 13 Pin plug Remove the plastic cover and check the cable connections PRI SEC vi sw s w rt rt vi 1...

Page 20: ...e If the LED is not flashing 2 minutes after increasing the set point exchange the cable to the board TH 61 with the cable to the IR cell Check the board TH61 as described for the IR cell CAUTION The temperature s influence on the baseline of the TC cell is very high Wait until the baseline is stable before analysing Use a computer to check the baseline TC C ELL 3 1 2 2 12 04000 ...

Page 21: ...igh alarm limit If the analyser starts the analysis after a long time say about 4 5 minutes after pressing pressing then interrupt the analysis by pressing Check the zero baseline with Adjust the baseline to zero if necessary see 2 12 Check the gas flow see 2 7 or increase it to 40 70 l h The instrument should start the analysis within a maximum of 30s after pressing the START button with furnace ...

Page 22: ...ting Water detector wheel running no If necessary change pump Check the wiring from pump to mains switch for continuity see 4 2 Check water tubes for bends Check if water is clean yes If necessary change pump yes no no N O W A T E R F L O W 220VAC pump voltage present yes no Displace air see 2 6 operational manual yes The pump is jammed release it see 1 10 Change the water see operation manual 1 7...

Page 23: ...pears next is coaxial to the internal pump shaft rotate it and the jammed shaft will be loosened Up to 10 rotations may be needed to restore working order Re install in reverse order Please note If the message No water flow appears because of dirty water or a failure of the board it is still possible to use the analyser until a spare part is avaible 1 Turn the main switch to position 0 2 Connect p...

Page 24: ... analyses Check the fuses of ON21 If fuses are OK Check TP3 of ON21 Replace solenoid valve yes no yes no Voltage on TP3 13 15VDC lower Voltage on TP13 12VDC yes OK Replace ON21 Replace water temp sensor Adjust P1 see 2 15 higher Replace ON21 yes no no no yes no 220VAC on tap water valve no Replace ON21 Replace ON21 About 13 15VDC on TP3 1 11 Adjust P2 of ON21 see 2 15 Message disappears Analyser i...

Page 25: ...ult on the ON21 board then it is still possible to use the analyser until a spare part is avaible 1 Turn main switch to position 0 2 Connect pin 2 with pin 7 and pin 8 of the 15 pin connector of ON21 3 Turn the main switch to position 2 Caution By passing the safety circuit can cause more damages Analysing without sensing the furnace temperature can damage the furnace 9 15 3 2 2 1 0 O N 2 1 1 7 8 ...

Page 26: ...line is lower than 1 V maybe some air remained in the reference side of the TC cell The reference flow is much lower than the analytical flow In this case it is necessary to purge the reference side Open the right side cover of the instrument Close the gas tube of the furnace gas inlet three times for 2 seconds Close the right side cover of the instrument Two minutes after this procedure the basel...

Page 27: ...ether it is a software problem or a too low voltage enter a lower power If the furnace power is not interrupted anymore the voltage was too low for the previous higher power For detailed explanation see 2 16 No water flow see 1 10 Check the wiring Replace ON 21 yes Replace the electronic drivers see 1 15 Check the wiring see 4 2 1 13 the DC Is voltage on TP11 0 5V or 15V 0 5V 15V 15V on TP13 of PW...

Page 28: ...W13 Measure the voltage of the motor between and lead while the switch is pressed Check the wiring of the sample drop control See 2 18 and 4 2 no Pull and remove the sample drop The motor does not rotate Are 24VDC on the motor Replace the motor to make sure that the motor is free to rotate Does the motor rotate Are 24VDC available yes yes no Check whether the GND test point of NK31 and GND test po...

Page 29: ...o energise solenoid valves inside the analyser see 4 3 or to send control signals see 1 2 1 13 and 1 14 Operation range of the driver ICs Depending on the fault location the following driver ICs need to be replaced IC b Furnace start see 1 13 and 2 16 purge valve see 4 3 IC c Motor for sample drop see 1 14 and 2 18 furnace open close see 4 3 IC d Furnace on off see 1 13 and 2 16 DRI VE R DRI VE R ...

Page 30: ... attached PC when either rhythmic or sporadic jumps of the zero line are present The cause for a rhymthic swinging is the chopper motor Replace the chopper motor see 3 5 Causes for noise are The pre amplifier replace see 3 1 and 2 3 The infrared detector replace see 3 1 and 2 3 A fault on the circuit board IR21 replace see 3 3 The power supply fluctuates see 3 3 and 3 4 The IR source is defective ...

Page 31: ... power 2 KW setting 200 and analysis power 1 KW setting 100 see Operation Manual 4 8 Try a new analysis if the problem no longer exists then the fault could be the following Furnace temperature too high see 1 11 No or insufficient cooling water see 1 10 Power transformer inside the analyser has been arranged for 400 V 3 phase but the mains is 220 V single phase Rearrange transformer accordingly se...

Page 32: ...eper responding The built in beeper of the analyser responds due to the following reasons When trying to analyse without entering the weight sample Furnace temperature is too high No or insufficient cooling water At request the beeper can be made to respond every time when an analysis is completed ...

Page 33: ...is meant here is the data that is saved in the accumulator buffered RAM area It consists mainly of the calibration factors the blank values and the linearity factors which are entered via the keyboard See 2 9 The linearity factors which were programmed in our company when the device was manufactured are saved in the EPROM they don t get lost After turning on the power again with an empty accumulat...

Page 34: ...sed to be before when the electrodes didn t overheat or if the settings are not higher than advised in the applications of the operation manual the reason of overheating must be a bad thermal and bad electrical contact to the upper furnace block caused by Dark ring 1 a not properly fixed screws 2 b grains or any other parts between the electrode 3 and the upper furnace block 4 or c the spring lock...

Page 35: ...o a flask of silicon oil and apply as shown below In order to spread the oil into the space between shaft and bearings turn the shaft and move it in axial direction at the same time The use of mineral oil is not suggested because mineral oils become dry and hard after a long time of operation If no silicon oil is available use silicon spray Silicon grease is also gut for this purpose and it is als...

Page 36: ... suddenly got the problem that the metal in the crucible was building a bubble The bubble climbed up to the top of the crucible and the metal was sticking on the upper electrode insert after opening the furnace The reason was a new quality of nickel baskets They were softer than his previous ones This indicated that the quality was different After using baskets of the previous quality the problem ...

Page 37: ...ifier 1 06005 Infrared electronics board IR 21 1 06741 Infrared electronics board IR 41 1 06032 Infrared detector with CO2 filter 1 06034 Infrared detector with SO2 filter 1 06421 Infrared power supply assembly IR13 1 06675 Infrared power supply assembly IR45 1 06058 IR Temperature control board TH61 1 06630 IR Temperature control board TH62 1 15037 IR Temperature regulation board NR32 1 11408 Pre...

Page 38: ...0 1 70380 O ring 35 x 5 VT for combustion tube CS 800 and for furnace internal CS 500 1 70390 O ring 38 x 5 VT for furnace CS 800 1 70285 O ring 19 x 3 VT for furnace ON OH 900 top 1 70405 O ring 47 2x 5 7 VT for furnace closure ON OH 1 70410 O ring 48 x 3 VT for furnace internal CS 500 1 70415 O ring 62 x 3 VT for furnace ON OH 900 centre 1 70425 O ring 90 x 2 5 VT for furnace ON OH bottom 1 Spar...

Page 39: ...ual OH 900 ON 900 ONH 2000 1 23 3 90270 Schütze reagent 100g 15098 Flow control card FC 21 1 15038 Pump control card NR32 1 77460 Micro switch 1 33440 Water level tank 1 09270 Gas pump 1 15115 Gas flow sensor 1 32450 Braid 1 77480 Clamps for water hose 5 ...

Page 40: ...al cleaning with solvent b worn out Replace it The upper surface of the electrode and the surface of the furnace where the electrode should properly touch is not clean or grains are sticking on this surface Check carefully and clean as describesd in a above The holes of the upper electrode where the four screws are screwed in are not free so that the screws cannot be screwed in deep enough In this...

Page 41: ... Read the flow rate on the upper flow meter of the analyser The flow rate is usually between 10 l h and 15 l h Select 1000 VDC resp 750 VDC multimeter range and connect it between TP1 and TP 2 of the NR 32 Adjust a minimum voltage with P1 of the NR 32 The minimum is usually between 90 VDC and 100 VDC Adjust slowly to enable the flow to stabilise to the set value of the flow Connect the multimeter ...

Page 42: ... adjustable with the potentiometer P1 of the FC 21 P 1 14b 5V TP 9 TP 5 T P6 TP1 0 P 2 2 0V 1 2 V TP 4 Re f er en c e TP 8 Re la is 1 1 2V Lo f lo w Hi n o f l ow E x t e rn a l f lo w e na b l e ELECTRONIC RACK I C 3 13 3 0 red black white red 5 9 2a 1a TP9 GND black T P 3 T P 6 12 2 GN D 2 4V 5 P 1 T P 2 T P8 T P 7 T P5 T P6 T P 3 Flow s ens or B 6 B 5 15 V T P9 T P 2 T P 4 T P 1 T P 7 brown 16 ...

Page 43: ...e ground is TP2 Caution The ground of the NR32 is not the same as the ground of the FC 21 and as the ground of all the other boards inside the analyser The output DC voltage of the NR 32 TP1 is with nominal flow between 90 VDC and 100 VDC The NR32 circuit can supply an output voltage ranging from zero to maximum about 200 VDC When this voltage reaches about 200 VDC the analyser displays a warning ...

Page 44: ...damage the sensor The solution is to prevent the analysis gases to get in contact with the sensors Therefore the sensor ports are connected with long tubes to the gas flow system There is no gas flow through the sensor tubes but only the pressure is sensed by the sensor In case of failure of a previous version sensor it is advisable to replace it by the new version In this case the part numbers of...

Page 45: ...age should be zero ATTENTION Measure this with a high impedance digital voltmeter Do not cause a short circuit while measuring or else the electronic drivers will blow If necessary the oxygen pressure can be adjusted to 1 bar 15 psi This can be read at the upper pressure gauge of the analyser The switch point can be set by turning the screw 1 If the switch is turned off 24 V when the pressure is a...

Page 46: ...frared cell about 10 cm towards the back With a small screwdriver adjust the trimmers 3 4 5 in the infrared rack so that the numbers shown on the display are between 0 20 and 0 20 The adjustment should preferably be carried out while the carrier gas is flowing If the zero level between 0 20 and 0 20 volts cannot be reached and if more than two adjustments were recently carried out then the problem...

Page 47: ...d IR 21 The position of the IR paths on the path plate 22 is open and can be changed according to the layout of the measuring ranges 10 Connection for O channel 11 Connection for low O channel 13 14 Pre amplifiers for O and low channel 16 17 Adjusters for pre amplifiers 19 20 21 Zero fine adjustment for baselines Each channel is adjusted separately Set the trimmers 19 20 21 in the middle of their ...

Page 48: ...sed Press the Cal key again to return to analysis On the temperature regulation card check if the LED flashes so that it is on half the time and off the other half see 2 5 ATTENTION When the test signal fails on test point 1 this can be due to the 8 pin connector 10 11 that connects the pre amplifier to the IR21 board not being correctly connected Remove turn 180 and replace the 8 pin connector an...

Page 49: ...4 V DC for 2 channel device 3 soldering location for 2 channel device 6 V DC for 3 channel device 4 soldering location for 3 channel device 2 Volts DC for each IR source Set above voltages through P1 The voltage of the capacitor C must be about 5 to 6V higher than the voltage of the IR sources measured on the a m test points If the voltage of C is too low either the transformer is not correctly co...

Page 50: ...mperature set point In case the LED is already blinking adjust the flash rate of the LED to 50 duty circle ATTENTION The effect of the readjustment will appear in a few minutes as soon as the temperature has changed to the new setting The voltage on TP1 TP2 GND does not correspond to the actual temperature of the IR cell but it corresponds to the power needed to keep the IR cell at a constant temp...

Page 51: ...ge This is normal When turning P1 you enter a new set point of the IR cell temperature which is at that moment different to the actual temperature of the cell The temperature control circuit will give full power to the heaters in case you have set a higher temperature or the circuit will completely shut down the power to the heaters if you have adjusted a lower temperature set point than the actua...

Page 52: ...ell heating elements comes from the connections 4 and 5 of the 7 pin plug measure the voltage on the screws without disconnecting the plug As long as the LED is on there is 200 V DC between 4 and 5 As long as the LED is off there is no voltage between 4 and 5 If there is no voltage between 4 and 5 then the NR 32 is faulty Replace it according to 3 6 The above sentences extend to the board TH61 Fro...

Page 53: ...ed system and sends the signal to the temperature control board TH 61 The TH 61 compares this signal with a set point value The resulting value drives a pulse width modulator The LED of this board shows the function of the modulator The modulated signal further drives and power stage of the NR 32 board the power signal returns to the TH 61 board from there it finally goes to the heater elements J2...

Page 54: ...rst After removing the side panel on the right hand side of the analyser the pressure is set by pulling and rotating knob 10 until the correct value of 2 bar is displayed on pressure gauge lower gauge on the front panel The upward speed of the furnace lift 11 is set with the screw 2 The speed of the final travel before the upper stop is set with the screw 7 The downward speed of the furnace lift 1...

Page 55: ...p The purge flow is activated with opening the furnace during the outgas phase This flow gets into the furnace through the furnace outlet so that only pure carrier gas flows in the analyser Adjust the gas flow as follows The main switch G is on pos 2 The furnace is closed piston up If not close the furnace and wait for 10 seconds Adjust the lower regulator D until the left flow meter A shows 30 l ...

Page 56: ...e purpose of this adjustment is to ensure that the furnace can lift and fit correctly into the upper chamber To adjust open the furnace and loosen the screws C the furnace is now free to move horizontally Close the furnace the furnace aligns itself as it moves into the upper chamber Fasten the screws C again B A C 2 8 1 ...

Page 57: ...ly nonlinear meaning that its output voltage is not proportional to the CO2 concentration It is therefore necessary to correct this nonlinearity electronically by means of the software in order to obtain accurate results The exact characteristic curve must be individually determined for each measurement channel and then fed into memory A so called linearity factor is transferred to the analyser by...

Page 58: ...r successive calibration 200 ppm O is used as the standard Channel 2 Oxygen Linearization factor approximate value 21000 Concentration 200 ppm O Sample weight 1000 mg Concentration 1000 ppm O Sample weight 1000 mg For successive calibration 1000 ppm O is used as the standard When the true factor is closely approaching by using the above methods an exact determination can be derived in the followin...

Page 59: ...utton by holding it down Then press the on off button Release first the and then TARE 2 Selecting the first programming mode 113 to stabilise the vibration by pressing the first digit No will appear on the display Change the digit No by pressing Repeat step 2 until the No 113 has been inserted then store with a short press on the TARE button 1 Selecting the 2nd programming mode 515 2400 Baud Same ...

Page 60: ... 2002 by ELTRA GmbH Germany January 2002 Service Manual OH 900 ON 900 ONH 2000 2 11 1 2 112 11 ...

Page 61: ...nnel is the baseline of the high nitrogen channel The value of the sensitive channel is 20 times higher An adjustment is necessary if the value of the high nitrogen channel is higher than 0 2V The zero baseline of the sensitive channel is not displayed Adjust as follows Type MENU CAL Turn trimmer 2 in a central position Search with jumper 3 a value close to 0 Adjust exactly to 0 with trimmer 2 TC ...

Page 62: ...H 2000 2 13 1 2 132 13 Diagnostic printout By pressing the Menu 0 keys a diagnostic report will be printed out on paper Attention The printer port must be activated with Menu 3 1 Enter This report should be faxed to ELTRA if interpretation or further instructions are needed ...

Page 63: ...TC Cell The thermostabilisation of the TC cell is similar to the IR cell Adjust the set point of the thermostabilisation with trimmer No 1 Turn clockwise to increase the temperature Caution The influence of the temperature on the baseline is very high Wait for the stabilisation after every adjustment TC CE LL 3 1 2 2 12 04000 ...

Page 64: ...P11 3 2 2 1 0 O N 2 1 P1 P2 P 3 2 1 5 1 TP12 TP13 TP15 B A TP8 TP7 TP6 TP5 TP4 TP14 TP3 TP9 TP10 J2 J 1 1 TP2 TP1 J 3 15V 15 V 15V A2 B1 A1 B2 A4 B3 A3 B4 HIGH if water temperature sensor broken T P10 VRef VRef TP7 TP5 7 3 4 5 6 8 11 19 TP9 J1 J1 F1 2AT VRef HIGH if furnace temp exceeds 70 C Water flow sensor 2 15 TP3 HIGH enables tap water valve HIGH if no problems with temperature T P2 VRef High...

Page 65: ...ter between TP5 and TP9 GND Range 20 VDC The voltage on TP5 for fixed temperature threshold is about 4 7 VDC Turn P2 counter clockwise for the error message to appear at lower furnace temperature Turn clockwise for the error message to appear at higher furnace temperature Note The lower the voltage on TP5 the higher the furnace temperature at which the error message temperature too high appears De...

Page 66: ...tic wheel on the board ON 21 This wheel is turning when there is enough secondary water flow which is created by the water pump When the analyser receives the command to start the analysis the software first checks the water flow wheel on the ON 21 If the wheel is turning and all the other preconditions are fullfilled then the furnace power will start If the wheel is not turning the analysis will ...

Page 67: ...ig furnace supply transformer is controlled so that the feedback signal from the current transformers and the set point from the electronic rack are equal The feedback signal depends on the magnitude of the furnace current To adjust set point and furnace current use trimmer P1 Enter an outgas power of 5 3 KW setting 530 in the menu Start the analysis Turn trimmer P1 during the outgas phase so that...

Page 68: ... plu g µ p B u s 3 5 Furnace All JUMPERS on the left row PW 13 32066 Po w e r O FF P o w e r O N T H Y R I S T O R PHASE c i r c u i t c o n t r o l M u l t i p l e x e r 8 10 10 1k 23 TP14 2 to 5 V DC for 2 to 5 kW TP11 0 5 V DC approx TP13 15 V DC TP 9 GND Pr ec ond i t i on s f o r po wer b l u e b r o w n y e l l o w g r e y g r e e n o r a n g e p i n k r e d b l a c k v i o l e t t w h i t e...

Page 69: ... voltage is between 2 V DC and 5 V DC The above mentioned commands however are not sufficient to have power An important precondition to power the furnace is the water flow Without water cooling the furnace will overheat The message for the presence of water flow is given by the board ON 21 transferred to pins 11 to 15 of the PW 13 and can be measured on TP 13 of the PW 13 15 V DC on TP 13 means w...

Page 70: ... 2002 by ELTRA GmbH Germany January 2002 Service Manual OH 900 ON 900 ONH 2000 2 17 1 2 172 17 ...

Page 71: ...or is activated by the electronic rack software The switching transistor connects the MINUS lead of the motor to GND The motor starts turning and shortly thereafter the eccenter of the motor shaft presses the switch From now on the motor is connected to GND via the switch and not through the transistor Before the motor makes a full turn the transistor is deactivated by the electronic controller Th...

Page 72: ...30 ECCENTER 12 13 9 1 SAMPLE DROP MOTOR green pink R47 ON21 GND 4 15 16b 20a 18a IC4 on MP 68000 IC3 on 68k DRIVER sw rt GND GND 24VDC ELECTRONIC RACK brown grey brown red green 1a red withe red 96 PIN PLUG 2 seconds 24VDC 2 1 10 11 PW13 R46 POWER SUPPLY GND SWITCH GND 5V 15V black MOTOR 15V T3 and T4 with the connected components are a separate circuit on the PW 13 1 14 3 GND is also the minus of...

Page 73: ...djust the position of the motor switch 7 next to the sample drop motor it is necessary to ensure that the cam 5 is turned to the position shown in the drawing This means that the switch must rest on the round edge not on the flat edge of the cam 5 This is achieved by setting the mains switch first to position 0 then to position 1 Watch the cam 5 rotating when it reaches the required position set t...

Page 74: ...1 gn ge sw 0 75 gn ge gn g e sw bl V9 V10 bl bl r t r t bl 25190 25190 r t D 3 D 1 3 0 l h Purge va l ve 50 l h V1 0 11 6 0 Elec trode im pulse f urnace D u s t 25 1 90 230VAC V10 30l h 50l h geändert am D 41469 Neuss Mainstr 85 Block 20 Benennung Zeichnungs Nr Datum gez gepr Sanda Polemitis Name 07 03 2005 07 03 2005 Bez 25580 Hot extraction upgrade b l u e b r o w n y e l l o w g r e y g r e e n...

Page 75: ...th single part path such as A the path is filled with ethanol and after a few minutes oxygen is blown into the empty path and will dry it out Soiling which can accumulate from the analyses of materials that contain a lot of sulphur and moisture or hydrogen can be very difficult to clean In such cases the paths should be replaced Before reassembling the paths the screws 3 should be screwed in by ha...

Page 76: ...er option with type No type number 407M36 611 In case the infrared detectors are to be replaced you can recognize them as described above 1 black marked tube connection 2 yellow marked tube connection 3 red marked tube connection In reinstalling the infrared cell unit in the analyser you must pay attention to the color markings of the tubes and their connections CO 1 2 3 CO 2 2 sw g e 3 1 2 rt 10 ...

Page 77: ...uld be held so that they do not turn with the nuts The chopper motor housing 1 does not need to be unscrewed The chopper motor housing 1 also does not need to be unscrewed when installing the IR sources 2 CORRECT WRONG CAUTION The IR source 5 itself should be in the middle of the ring 6 this is without considering the location of the soldered connections which are not centered See above drawing A ...

Page 78: ... The plugs 1 2 3 4 should be unplugged The 10 screws 6 and 7 should be removed On the IR21 circuit board no adjustment is needed You should however check the adjustments on the infrared cell as in 2 3 The IR21 circuit board is malfunctioning when the correct signal can be measured at test point 1 while the signal at test point 6 cannot be adjusted to zero see 2 3 2 3 4 5 2 3 4 5 2 3 4 5 2 3 4 5 2 ...

Page 79: ...to keep costs down exchange modules are offered Replacement The four fastening screws 2 for the power supply unit are removed The plug 3 is removed The power supply unit 1 is turned The wires 4 are separated from the power filter 5 unsoldered The new power supply unit 1 is installed in the reverse order It is suggested that adjustments are made according to 2 4 1 3 2 2 3 4 1 1 2 3 0 605 9 I R 1 3 ...

Page 80: ...st be removed The safety ring 4 is removed One after the other the washer 5 there could be two the chopper blade 1 the cylinder 6 and the spring 7 are removed Reassemble in reverse order CAUTION Before re assembling check the position of the IR source 8 and if necessary center its position see 3 2 The heating wire is not very elastic therefore do not move it back and forth you rather should correc...

Page 81: ...d to the plug 1 CAUTION Due to the high current for the IR sources the solder joints must be very well made Inside the plug 1 two pins are soldered together to form one connecting point Two such connecting points are present in the plug 1 Each of the two cables 3 are soldered to each connecting point Polarity is irrelevant Afterwards the chopper blade is refastened see 3 5 This is reassembled in t...

Page 82: ...erature sensor 5 and the heaters 4 Replacing the TH 61 The plug 4 should already have been removed during the removal of the infrared cell from the analyser Unscrew and remove the power supply module 1 see 3 4 Disconnect the plug 2 Remove the four nuts 3 Re assemble in reverse order Make adjusts to the unit according to 2 5 5 4 2 1 0 6 0 5 9 3 NR 32 TH61 06058 4 1 5 03 7 3 6 1 1 S 2 3 0 605 9 I R ...

Page 83: ...e available silicon grease can be used Solder the cables on Secure the heaters against falling out with silicon gel Replacing the temperature sensor Unsolder the cables 4 Cut away the silicon gel from the temperature sensor 3 Screw in the new temperature probes Solder the cables 4 on CAUTION The threads are of aluminium Therefore screw in the probes very lightly After replacing the temperature sen...

Page 84: ...above test by squeezing each single tube along the gas system until the leakage area is located see drawing below 1 5bar 22p si H O 2 C O 2 C O 2 C O 2 H O 2 H O 2 3 0 l h El ec trode impul se fu rnace 30l h 50l h D u s t Purge Mea sure Pu rge va lve c o n t r o l l e d 1 5 b a r 22 Pressure switch 1 5 bar ps i 0 5 0 2 5 2 1 gas stop Carrier 30 60ps i 2 4bar y ell ow Purg e 50 l h Carrier Gas Heli...

Page 85: ...he aid of a screwdriver using it as a lever the two EPROMS from the CPU board see figure Insert the new EPROMs according to the H and L identification see figure and be sure the positioning is correct by comparing the marks Clear the memory see 3 9 Important When installing 27C512 EPROMS check that the jumpers are connected as shown in the drawings If the instrument has an older card follow the fi...

Page 86: ...memory Set the power switch to setting 1 Open the furnace Detach the left hand cover of the analyser Detach the power plug 1 from the electronic unit Press the reset key 2 on the base plate of the electronic unit for at least 30 seconds Restore the unit to its original condition Recalibrate 2 1 80 65 3 9 1 ...

Page 87: ... Electronics reset Should problems with the electronics come up Press STOP If the problem remains Turn the power switch to pos 1 Open the furnace Disconnect the cable 1 from the electronic unit for 10 seconds and plug back in Should the problem remain see 3 9 Clearing the memory 2 1 80 65 3 9 1 ...

Page 88: ...A and row C are interconnected as follows Labels on the connector according to the instrument type Instrument Connections a with Code No version c inside the connector shown on display during initialization 1 x O 32 nc 30 29 28 nc 22 2 x N 32 31 nc nc 28 nc 26 1 x O 2 x N 32 nc nc nc 28 nc 2C 2 x O nc nc 30 29 28 nc 23 2 x O 2 x N nc nc nc nc 28 nc 2F Caution The electronics unit takes notice of t...

Page 89: ...ector according to the instrument type Instrument Connections a with Code No version c inside the connector shown on display during initialization 1 x O 32 nc 30 29 28 nc 22 2 x H 32 31 nc nc 28 nc 26 1 x O 2 x H 32 nc nc nc 28 nc 2C 2 x O nc nc 30 29 28 nc 23 2 x O 2 x H nc nc nc nc 28 nc 2F Connect also 5c with 28a for all above versions otherwise the ON versions will appear Caution The electron...

Page 90: ...rument Connections a with Code No version c inside the connector shown on display during initialization 1 x O 32 nc 30 29 28 nc 22 2 x N 2 x H 32 31 nc nc 28 nc 26 1 x O 2 x N 1 x O 2 x H 32 nc nc nc 28 nc 2C 2 x O nc nc 30 29 28 nc 23 2 x O 2 x N 2 x O 2 x H nc nc nc nc 28 nc 2F Remark In case of 2 x H 1 x O 2 x H and 2 x O 2 x H the ON OH switch of the front panel connects additionally 5c with 2...

Page 91: ... It is very complicated to add a TC cell for nitrogen channels to an oxygen instrument The carrier gas changes a purge and reference flow must be installed The electronics and wiring must be modified This work should be done in the factory Otherwise ask for more information The following components may be needed when adding more IR cells 05257 Chopper housing with one IR source and motor 05254 Cho...

Page 92: ...w the nut 1 Remove the coil 2 only with the 2 2 valve Unscrew counter clockwise the hexagon screw on the armature housing Remove the armature 5 only with the 2 2 valve Careful Do not lose the spring 4 With oxygen pressure or compressed air clean the inside of the armature housing 3 as well as the armature 5 and re assemble the solenoid valve With the furnace closed and renewed oxygen pressure chec...

Page 93: ...ed inside the infrared cell Flow sensor situated inside the TC cell INF RARED CELL F l o w s e n s o r A OH900 for OXY GE N and HY DR OG EN O N900 f or O XY GE N and NITRO GE N Valid for Ser ial N umber s fr om 0450xxxxxx up t o 0724xxxxxx 0 400 8 ON 900 for N ITR OGE N only T C C EL L B Flow sensor 04 007 OH 900 for H YD R OG E N only TC CELL Flow sensor C 03 1 4 ...

Page 94: ...the instrument the flow sensor may be found either inside the infrared rack or inside the temperature conductivity rack see above drawings INFRARED CELL A Flow sensor ON900 for OXYGEN only OH900 for OXYGEN only Valid for Serial Numbers higher than 0725xxxxxx 34810 ON 900 OH 900 04345 04365 TC CEL L T C CELL OH900 for HYDROGEN only OH900 for HYDROGEN and OXYGEN ON900 for NITROGEN only ON900 for NIT...

Page 95: ...g the flow sensor Remove tubes 2 and 3 from the flow sensor 6 by loosening screws 1 Disconnect the 9 pin plug Remove the screws 4 remove the block 5 now the flow sensor 6 is loose Replace the flow sensor 6 re install in reverse order Finally adjust the flow rate see 2 1 6 4 5 2 3 2 3 6 1 3 14 1 ...

Page 96: ...s simple to do as units 7 8 9 use standard plugs It is then advisable to protect the balance 2 the printer 3 and the computer 4 with a stabilizer 11 The stabilizer 11 is plugged into the triple plug 10 rear of the analyzer The electronics unit 9 the infrared cell 7 and the TC cell 8 are plugged into a power strip 6 using a normal power cable the device cable The original power plugs 12 13 14 of th...

Page 97: ... 3 16 1 3 163 16 Replacing the gas pump Switch off the instrument and pull the main power plug Disconnect the plug 1 of the pump Disconnect the tubes 3 and 4 from the pump Remove the four plastic rings 5 remove the pump Reinstall pump in reverse order OUT 3 4 5 IN 5 bl br ge gn 1 ...

Page 98: ... upward movement of the furnace piston is obtained this way When upgrading the standard pneumatics with the magnetic switch 9 the solenoid valve 10 and the pressure regulator 11 the furnace piston will go up with a very low pressure no danger and finally it will close at full pressure 3 4 2 24V red 0V 1 11380 11440 6 5 9 7 11492 12 11 10 0 2bar 3psi original cable The O ring remains connected blue...

Page 99: ...C the piston won t change position in case of a power failure If the piston was down it will remain down if it was up it will remain up in case of a power failure Both safety features can be combined by means of the above upgrade circuit 3 4 2 24V red 0V 1 11380 11440 6 5 9 7 11492 12 11 10 0 2bar 3psi original cable The O ring remains connected blue FILTE R 8 11390 220VAC 3 16 1 3 4 2 FILTER 220V...

Page 100: ...is of course connected to earth Rearrange the connection of the power transformer according to the following instructions 32A 2 A 100 0A b r bl sw bl b r sw rt g r bl o r br 0V 40 0V E l e ct r o n i c d r a w Setting 2 Ca rrier gas st op S ett ing 1 120 44 230V Pr i Se c 8 7 vi sw 6 230VAC 3 3 5 0 0 T h y r is t o r b loc k 24V DC Mains power switch RF fi lter Sol id state rel ais on ON 21 L2 L3 ...

Page 101: ... operation the two windings must be connected in parallel the following way Cut the common wire 1 between the two primary coils Join the two resulting ends to the connector 2 according to the above drawing in order to obtain a parallel connection of the two transformer coils gr ge rt br 4 5 2 1 2 2 bl br ge gr gn or rs rt sw vi ws blue brown yellow grey green orange pink red black violett white ...

Page 102: ...tall the front frame and the rear frame Upgrading of older analysers equipped with the previous flow sensor rotameter in the IR cell is theoretically possible but practically difficult The new software is made for the latest versions of analysers with the electronic flow sensor and with two oxygen inlets furnaces Therefore older analysers can not run with the new software unless the analyser is fi...

Page 103: ... lables IN and OUT on the valves to comply with the drawing 25024 Connect them according the drawings 25545 and 25533 According to these drawings the two new valves V7 V8 have to be connected with a red cable to 24V at the pressure switch lead The other leads of the V7 V8 coils are connected to the lead C3 of the ON OH switch with a blue cable One diode 1N4007 has to be installed in between C3 of ...

Page 104: ...15 18V AC 18V AC GND A b lu e b ro w n y e l lo w g re y g re e n o ra n g e p in k r e d b la c k v io le tt w h i t e b l b r g e g r g n o r r s r t s w v i w s gr gn ws 3 V1 rs rt Pressure switch Purge valve r s b r g r b r g r 11 21 1 v i v i R C 2 2 0 V b r g r b l w s sw bl v i 16 10 0 NK 31 rt sw geändert am D 41469 Neuss Mainstr 85 Block 20 Benennung Zeichnungs Nr Datum gez gepr Sanda Pol...

Page 105: ...gn or rs rt sw vi ws bl ws gn ge ge gr gr gn ws ge gr gr rs vi rt br ws rs gn ge C a t a l y s t f u r n a c e A 1 2 vi rt 3 4 0V Thermistors off Pneumatic 24V Thermistors on TC Cell rt br Pneumatic valve vi vi B rt br V 8 V 7 geändert am Bez D 41469 Neuss Mainstr 85 Block 20 Benennung Zeichnungs Nr Datum gez gepr Sanda Polemitis Name 25545 22 02 2006 22 02 2006 ONH 2000 Low voltage wiring blue ca...

Page 106: ...AC 2 3 ws bl All conductors 0 75 sw br ws gr br b l N2 He 25186 V5 V6 C Electronic unit TC Cell Cooling fan IR Cell br gr bl bl bl bl bl blue brown yellow grey green orange pink red black violett white bl br ge gr gn or rs rt sw vi ws rt geändert am D 41469 Neuss Mainstr 85 Block 20 Benennung Zeichnungs Nr Datum gez gepr Sanda Polemitis Name 23 02 2006 23 02 2006 Bez black cable channel left hand ...

Page 107: ...5 77411 A 10 5 4 3 2 0 1 V OL TC R A F T 70230 11062 70230 70230 70230 70230 11062 O H O N 78015 20002 8 1 ON 4 4 Miscellaneous 4 1 4 1 Ordering numbers Front panel 11062 Reagent tube 11064 Reagent tube 11480 Adjustable restrictor 15083 Gas flow indicator 15 l h 15085 Gas flow indicator 130 l h 20000 Catalyst furnace 20040 Catalyst tube 70210 O ring 70230 O ring 72010 Pressure gauge 77410 Panel me...

Page 108: ...2 Service Manual OH 900 ON 900 ONH 2000 4 1 2 Chopper assembly 05020 Chopper blade 05030 Chopper blade holder 05065 Chopper motor 05048 Infrared source emitter 70280 O ring 70330 O ring 75120 Spring 75130 Retaining washer 75190 Washer 4 1 1 ...

Page 109: ...e length 05275 Infrared preamplifier 06005 IR 21 Infrared electronics board 06025 IRT zero adjustment board 06032 Infrared detector with CO2 filter 06058 Temperature control board TH 61 06059 Rear panel with components 06210 Cable 06251 IR cell transformer 06421 Infrared power supply assembly 11180 Filter 15115 Gas flow sensor 70330 O ring 77510 Heaters for IR cell 77423 Temperature sensor for IR ...

Page 110: ...421 06748 06749 IR TC CELL 04007 TC board TC1 3 05067 IR path for high oxygen 05068 IR path for low oxygen 05254 Chopper housing 05270 Threaded rod advise the length 05274 Infrared preamplifier 05584 TC sensor 06210 Cable 06421 Infrared power supply assembly 06670 IRT zero adjustment board 06748 Infrared electronic board IR41 2channels 06749 Infrared electronic board IR41 1channel 15205 Gas flow s...

Page 111: ...045 Transformer 32066 Power control board PW 13 11045 Blower 32210 Water temperature control board ON 21 11408 Pressure switch 32400 Transformer 14017 Pneumatic cylinder 33440 Water level tank 16100 Power supply board NK32 33485 Water temperature sensor 31220 Lower furnace assembly 33500 Water pump 31230 Upper furnace part 60234 Pneumatic valve 31246 Combustion chamber 77033 Circuit breaker 32A 31...

Page 112: ...390 33065 IR TC CELL OH ON ONH 05583 H ZERO N ZERO TC IN FLOW SENSOR LO HI OXYGEN ZERO IR IN IR PURGE IR OUT NR32 15268 12044 Analysator IR TC cell side 05583 IR TC cell 11390 Gas valve 12044 Transformer 15037 Voltage stabiliser board NR32 IR version 15266 Gas pump 15268 Pump control board PC1 18467 Microcontroller board UNI ...

Page 113: ...furnace part 31325 Sample drop mechanism 31331 Cooling cover 31345 See wearing parts 31360 Graphit tip 31365 See recommended parts 31380 Isolating ring 31393 Lower power connector 70285 O ring 70405 O ring 70415 O ring 70425 O ring 70430 O ring 70435 O ring 4 1 10 70435 70285 31325 70430 70415 70425 31345 31360 31365 31380 70405 31331 31220 31322 31393 ...

Page 114: ...any January 2002 Service Manual OH 900 ON 900 ONH 2000 4 1 8 11435 01160 V4 V3 V2 11430 11442 V8 25196 V7 25196 Valves plate 25026 01160 Valve V4 11430 Valve V2 11435 Valve V3 25196 Valves V7 and V8 just for ONH 2000 analyser ...

Page 115: ...insert 31325 Sample drop mechanism 31331 Cooling cover 31360 Graphite tip 31365 Graphite tip holder 31380 Isolating ring 31393 Lower power connector 31220 Lower furnace assembly 70405 O ring 70410 O ring 70415 O ring 70425 O ring 70430 O ring 70435 O ring 90190 Graphite crucible 31331 31230 70430 70410 70435 31360 31365 31250 31393 90190 31246 70415 70425 70405 31380 31220 31325 31215 ...

Page 116: ...ace 31220 Lower furnace assembly 31230 Upper furnace part 31246 Combustion chamber 31250 Upper electrode insert 31325 Sample drop mechanism 31331 Cooling cover 31360 Graphite tip 31365 Graphite tip holder 31380 Isolating ring 31393 Lower power connector 70405 O ring 70410 O ring 70415 O ring 70430 O ring 70435 O ring 71010 Cleaning brush 71029 Furnace cleaning brush 72100 Screw 72101 Screw 72102 S...

Page 117: ...20 rt sw 31480 31492 77460 31450 31451 78054 31325 31466 Analyser right hand side 31325 Sample drop mechanism 31450 Lower bride 31450 Upper bride 31466 Eccentric wheel 31480 Support for motor bracket 33120 Tube for dust trap 77423 Temperature sensor 77460 Micro switch 78054 Motor for sample drop ...

Page 118: ...32A N L1 ge gn tran sformer Furnace pow er Coo ling f ans Wat er pump 5 3 4 2 1 P h a se sy n c h r o n i sa t i o n T C Cel l IR Ce ll Connect blue with brown and black with black in the power plug Connect phase trans former to 230V Use 1000A power transformer with 230V primery coil For 230V AC single phase operation Phase transformer 320 66 PW 13 1610 0 NK 31 Gas pu mp 0 9 2 7 0 NR3 2 1503 8 GND...

Page 119: ...1 32210 0 75 sw br Phase control transfor mer Cooling fan 400V 400V 400V PE Water flow valve PW13 32066 gn ge 1 5 gn ge gn ge ws 4A sw Cooling fan 1 5 32A vi rt Für Betrieb mit 220V sw mit sw und br mit bl verbinden Netzleitung 300cm 5x2 5 blue brown yellow grey gree n oran ge pink red black violett white b l b r g e g r g n o r r s r t sw vi ws 0V 0 75 2 5 2 5 33500 Water pump 1 2 3 4 5 6 7 8 bl ...

Page 120: ...5 TC Cell blue brown yellow grey green orange pink red black violett white bl br ge gr gn or rs rt sw vi ws sw ws s w gr 3 2 11390 bl V 5 gr gr bl bl Cooling fan IR Cell s w 2 20VAC 22 0VDC Newtral 230 VAC geändert am D 41469 Neuss Mainstr 85 Block 20 Benennung Zeichnungs Nr Datum gez gepr Knipp Polemitis Name Bez 32195 ON 900 black cable channel left hand side Mains power wiring 9 3 2001 9 3 2001...

Page 121: ... D37 Socket solder side 9 8 2 4 5 1 screened 16 28 9 br ws gr gn 7 18 O Hi O Hi GND O Lo O Lo 4 2 5 6 7 8 3 High O auto zero signal Low O auto zero signal High O output signal GND 5 2 4 Low O output signal 3 1 PIN 8 IR Temp N Hi N Lo GND GND 14 29 IR temp zero TC temp 6 9 5 1 D 9 So cke t so lde r sid e Auto zero signal 2 PIN 1 TC Temp Low N output signal High N output signal 4 5 GND 8 GND 9 TC CE...

Page 122: ... 65 cm 24V 22ac GND 24ac 23 9 17 18 10 11 3 20 19 ws gn bl sw rs gr gn rt br gr ws br 30 cm 40 cm 40 cm 40 cm 40 cm 30 cm 13 11 28 31 27 15 18 1 7 vi vi 140 cm 3 2 115cm rt vi rt 60 cm 60 cm Pump control 100 cm 100 cm 42 cm Pneumatic valve Purge valve Pressure switch 49 cm 49 cm gr ws br ws br gn rt ws gn bl sw 15V GND 15V 50 cm 50 cm 50 cm Phase GND 50 cm 115cm 24V AC GND 24ac Furnace voltage 33 ...

Page 123: ...cm 40 cm 40 cm 30 cm FC21 15098 50 cm Furnace voltage 2x 0 75 1 5 c m 2x 0 75 5 0 c m NK31 16100 130 cm Furnace temp 30 sw 5 rt 4 gr 7x 0 14 x70 cm abgeschirmt D50 Buchse Lötseite D25 Buchse Lötseite D15 Buchse Lötseite D37 Buchse Lötseite D37 Buchse Lötseite 9 8 2 4 5 1 5x 0 14 x30cm 1 1 0 c m N Hi N Lo GND GND 14 29 zero TC temp 6 9 5 1 D9 Buc hse Löt seit e Auto zero signal 2 PIN 1 TC Temp Low ...

Page 124: ...w rt sw sw rt 16 1 00 N K3 1 7 PW 13 rs rt 24 M OTOR b l s w 10 9 17 23 3 18 11 21 g n r t rt 33 6 5 13 18 15 31 7 28 27 11 g r 21 1 12 1 8 12 13 24 25 gn g n bl bl b r 1 0 0 0 A Blue cable channel right hand side Low voltage ON 900 PW13 32066 ON21 32210 v i v i Pressure sw itch Purge valve Sample drop Phase transformer 15 0 15 18V AC 18V AC GND A b l u e b r o w n y e l l o w g r e y g r e e n o ...

Page 125: ... 3 4 3 2 1 7 6 B 0V Thermistors off Pneumatic 24V Thermistors on TC Cell blue brown yellow grey green orange pink red black violett white bl br ge gr gn or rs rt sw vi ws bl ws gn ge ge rt br gr gr gn ws vi vi ge gr gr rs vi rt br ws rs gn ge C a t a l y s t f u r n a c e Pneumatic valve L o w v o l t a g e w i r i n g O N 9 0 0 b l u e c a b l e c h a n n e l l e f t h a n d s i d e ...

Page 126: ...emperature co ntrol 3 Pump 0 Low Oxyg en IR Signal 4 TC Signal N H 2 Oxyge n IR Signal 4 Auto zero N H 2 Oxygen auto zero 0 Low Oxygen auto zero 1 5 6 Furnace po wer 3 5 6 Lo w N H TC Signal 7 Con trol vo ltage s OUTPUTS Detector sign als INPUTS MP68 Electro nic rack 18 005 1 Gas flow Test points 37 p i n p lu g O N O H 9 0 0 18007 GND 15V 15V 5V ...

Page 127: ...1 9 9 7 5 3 1 3 5 33 33 3 1 31 31 29 29 27 25 23 2 1 21 19 19 white brown black red green violett blue yellow pink grey red blue shield S o l d e r s i d e v e w S o l d e r s i d e v e w 2 4 2 0 5 3 7 5 2 3 4 7 1 8 9 1 5 s o l d e r i n g s i d e v i e w D 1 5 p l u g 1 1 3 14 25 D 2 5 p l u g s o l d e r i n s i d e v i e w w h i t e b r o w n y e l l o w g r a y g r e e n s h i e l d 2 3 4 5 7 ...

Page 128: ...sis sequence AN ALYSI S TIMES Outgas current Purge valve Analysis current O N Integration Sample drop Integration delay time Purging waiting time Min Analysis time Max Analysis time Purging before Analysis Purging after outgassing Waiting after sample drop START ANALYSIS END of Analysis OPEN the Furnace CLOSE the Furnace 32710 ...

Page 129: ...ater temperature sensor Secondary water cooling tank Tap water drain Tap water coil Tap water inlet Tap water solenoid valve 4 3 1 0 Tap water drain 3 Ga s o u tle t Fu se sl ow b lo w 4A 230 V A C 1 N 50 60Hz ma x 7500 Watt s 40 0V A C 3 N 50 60Hz N it rog en i nl et 2 4 b ar 30 6 0ps i 99 9 pure 1 4 5 6 2 3 4 2 1 Tap water inlet Water pump ...

Page 130: ...O furnace 2 b l ac k r e d y el l ow y e l lo w g r e y re g u la to r Pre s s ur e I n f r a r e d C e l l g r e e n b lu e gas stop Carrier 23 0VAC 1 13 90 V5 Pu rg e v a lv e V1 0 116 0 H O 2 C O 2 H O 2 C O 2 1 5 b ar Pressure switch 22 p s i 30l h 50 l h O U T Dust 15l h controlled O N 9 0 0 G a s F l o w D i a g r a m V a l i d f o r S e r i a l N u m b e r s f r o m 0 4 5 0 x x x x x x u p ...

Page 131: ... o l l e d 1 5 b ar 22 Pressure switch 1 5 ba r p si 0 5 0 2 5 2 1 gas stop Carrier 30 60ps i 2 4bar Purge 5 0 l h Carrier Gas Helium r egula tor Pr essur e 0 35bar 5 3 psi Flow se nsor O N 90 0 TC C ELL 15l h c o n t r o l l e d O U T IN G a s p u m p gr ey yel low gr ee n bl ue b la c k r ed C O f u r n a c e C O 2 Infrared Cell Valid for Serial Numbers from 0725xxxxxx to 1000xxxxxx Oxygen and N...

Page 132: ...rs from 0450xxxxxx up to 0724xxxxxx 34020 ye llo w Infrared Cell r ed Flo w se nso r Electrode im pulse furnace bl ac k 0 1 5 2 5 2 1 0 5 b a r Pre ss ure 30 6 0p si 22 ps i Carr ier Ga s Nit rog en 2 4 ba r 1 5 ba r re gu lat or Me as ure Pur ge 1 5 ba r Pressure switch 22 ps i Pur g e va l ve V1 01 16 0 24 VDC gas stop Carrier 2 30 VAC 1 13 90 V5 H O 2 C O 2 CO CO furnace 2 Dust 15l h controlled...

Page 133: ... switch Pressure 11 430 3 0 l h D u s t Pu r ge v al v e 22 1 5 ba r ps i 5 0 l h Electrode impulse furnace C O C O f u r n a c e 2 V1 011 60 30l h 50l h 1 5 bar 22psi H O 2 C O 2 bl a ck F lo w se n s o r Infra red Cell re d 114 35 V3 24 VDC OUT Gas pump IN 15 l h c o n t r o l l e d Carrier gas outlet Purge Measure O x y g e n o n l y a n a l y s e r O N 9 0 0 G a s F l o w D i a g r a m V a l i...

Page 134: ... 0450xxxxxx up to0724xxxxxx 34030 Electrode im pulse furnace 1 5 re gu lat or Pres su re F lo w s e ns o r blu e g r een y el low g r ey 22 ps i 30 6 0p si T C CE LL 2 4ba r 1 5b ar 0 5 2 2 5 0 1 b a r Ca rrie r Ga s Hel ium Mea su re Pu rg e H O 2 C O 2 H O 2 C O 2 Pur g e va l ve V1 01 16 0 24 VDC gas stop Carrier 23 0VAC 11 39 0 V5 1 5 b ar Pressure switch 22 p si CO CO furnace 2 Dust 15l h con...

Page 135: ... e d 1 5 b a r 22 Pressure switch 1 5 b a r p si 0 5 0 2 5 2 1 gas stop Carrier 3 0 6 0 p si 2 4 ba r g r e e n b lu e Purge 5 0 l h Flow s ensor ON 9 0 0 TC C EL L 15l h c o n t r o l l e d O U T IN G a s p u m p g r e y ye ll o w g r e e n b lu e C O C O f u r n a c e 2 34035 regulator P ressure 0 3 5 ba r 5 3 p si ON 900 Gas Flow Diagram Nitrogen only analyzer Valid for Serial Numbers from 0725...

Page 136: ... n d H y d r o g e n a n a l y z e r V a l i d f o r S e r i a l N u m b e r s f r o m 0 4 5 0 x x x x x x u p t o 0 7 2 4 x x x x x x 1 5 b a r 1 5b ar 22 ps i P urg e bl ac k r ed C O C O Flow se nso r O UT P res sur e s wit ch El ectrode impul se furnace y el l ow y el l ow re gulat or 1 5b ar 2 4b ar 30 60p si 22p si 1 5 l h c o n t r o l l e d TC CE LL 2 2 2 Car rier Ga s N it ro gen Infrared...

Page 137: ...d 1 5 ba r 22 Pressure switch 1 5 bar psi 0 5 0 2 5 2 1 15l h c o n t r o l l e d O U T I N G a s p u m p gas stop Carrier bla ck 30 60ps i 2 4bar gr ey y ell ow gr een blue OH 900 Flow sen sor Pur ge 5 0 l h I nfrared Cell Carrier Gas Nitrogen regulator Pr essur e 0 35bar 5 3ps i TC Cell O H 9 0 0 G a s F l o w D i a g r a m O x y g e n a n d H y d r o g e n a n a l y s e r V a l i d f o r S e r ...

Page 138: ...l a c k y e l l o w r e d 3 4 0 5 0 O H 9 0 0 G a s F l o w D i a g r a m O x y g e n o n ly a n a l y z e r V a l i d f o r S e r ia l N u m b e r s f r o m 0 4 5 0 x x x x x x u p t o 7 2 4 x x x x x x C O regulator 3 0 6 0 p s i 2 2 p s i 1 5 l h c o n t r o l l e d S c h u t z e s r e a g e n t Carrier Gas N itrogen Pressure g a s s t o p C arrie r s w i t c h 1 5bar 2 4 b a r 0 5 0 2 5 2 1 2 ...

Page 139: ...nace 30 l h 50 l h D u s t Purge Measure Pu rg e valve c o n t r o l l e d 1 5 b a r 22 1 5 b ar p si 0 5 0 2 5 2 1 gas stop Carrier Purge 5 0 l h re d 3 0 60 p si 2 4 b a r 1 5 b a r 22 p si regulator Pressure regulator Pressure 0 3 5 b ar 5 3p si Carrier Gas Nitrogen Pressure switch OH 900 Gas Flow Diagram Oxygen only analyser Valid for Serial Numbers from 0725xxxxxx to 1000xxxxxx C O 2 34055 y ...

Page 140: ...r o l l e d g a s s t o p 3 4 0 6 0 F l o w s e n s o r y el low gr ey H O 2 C O 2 C O 2 C O 2 H O 2 H O 2 S c h u t z e s r e a g e n t C O C O Pu rge val ve c o n t r o l l e d G a s p u m p 1 4bar 1 5 6 0 p s i Carrier Gas Nitrogen 5 3psi 0 35bar Ca rri er Pressure gr ee n b lu e regulator TC CELL V a l i d f o r S e ri a l N u m b e rs f r o m 0 4 5 0 x x xx x x u p t o 0 7 2 4 x xx x x x O H ...

Page 141: ... t Pur ge Measur e P urge valv e c o n t r o l l e d 1 5 b ar 22 Pressure switch 1 5 b ar p si 0 5 0 2 5 2 1 15l h c o n t r o l l e d O U T I N G a s p u m p gas stop Carrier 30 60ps i 2 4bar gr ey y ell ow gr een blue OH 900 Flow se nso r Purge 5 0 l h Carrier Gas Nitrogen regulator Pr essur e 0 35bar 5 3ps i TC Cell OH 900 Gas Flow Diagram Hydrogen only analyzer Valid for Serial Numbers from 07...

Page 142: ... 2002 by ELTRA GmbH Germany January 2002 Service Manual OH 900 ON 900 ONH 2000 4 3 15 Gas flow diagrams valid for serial numbers from 1000xxxxxx ...

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Page 165: ... 2002 by ELTRA GmbH Germany January 2002 Service Manual OH 900 ON 900 ONH 2000 4 3 38 ...

Page 166: ...5 0 2 5 2 1 11430 ON Operation T C C e l l green blue black red Reference flow V3 Reference flow outlet 11435 OH Operation 2 4b ar 24VDC 22 ps i 2 2ps i yellow grey ON Operation Measur e ONH 2000 D u s t H O 2 C O 2 C O 2 H O 2 N ON Operation Analysis mode OUT Gas pump IN Carrier gas outlet Energised solenoid valve coils 30l h 50l h Pressure switch H 11 7 V1 V4 25195 V8 yellow PR4 V6 V2 230VAC V5 ...

Page 167: ...d Reference flow V3 Reference flow outlet 11435 24VDC yellow grey Measure D u s t H O 2 C O 2 C O 2 H O 2 OUT Gas pump IN Carrier gas outlet Energised solenoid valve coils 30l h 50l h Pressure switch 11 8 V1 V4 yellow PR4 V2 22 psi 1 5 bar 24V DC 01160 24V DC CO CO furnace 2 OH Operation 25195 V8 230VAC 25195 V7 230VAC Pressure regulator 2 N H 2 5 18 6 He OH Operation 2 4bar V5 22psi 22ps i ON Ope...

Page 168: ...Operation T C C el l green blue black red Reference flow V3 Reference flow outlet 11435 OH Operation 2 4bar 24VDC 22psi 22psi yellow grey ON Operation ONH 2000 D u s t H O 2 C O 2 C O 2 H O 2 N Purging mode ON Operation OUT Gas pump IN Carrier gas outlet Energised solenoid valve coils 30l h 50l h Purge Pressure switch H 24V DC V1 V2 PR4 230VAC V5 V6 V4 yellow Purge 01160 24V DC 22 psi 1 5 bar OH O...

Page 169: ... l l green blue black red Reference flow V3 Reference flow outlet 1 14 35 OH Operation 2 4 ba r 24VDC V5 2 2 psi 2 2 p si yellow grey ON Operation V2 V3 V5 V6 V1 V4 ONH 2000 V6 230VAC D u s t H O 2 C O 2 C O 2 H O 2 Purging mode OH Operation OUT Gas pump IN Carrier gas outlet Energised solenoid valve coils 3 0l h 50 l h Purg e Pressure switch N Purge V4 V1 24V DC yellow PR2 PR4 V2 OH Operation 24V...

Page 170: ... 1 1 43 0 ON Operation T C C e l l green blue black red Reference flow V3 Reference flow outlet 1 1 43 5 OH Operation 2 4bar V5 22psi 22psi yellow grey ON Operation Mea su re ONH 2000 V6 230VAC D u s t H O 2 C O 2 C O 2 H O 2 Gas saving mode ON Operation OUT Gas pump IN Carrier gas outlet Energised solenoid valve coils 30l h 50l h Pressure switch PR4 V1 V4 N yellow V2 Purge 22 ps i 1 5 bar 0 1 16 ...

Page 171: ... 0 ON Operation T C C e l l green blue black red Reference flow V3 Reference flow outlet 1 14 3 5 OH Operation 2 4bar V5 22psi 22psi yellow grey ON Operation Me asur e ONH 2000 V6 230VAC 230VAC D u s t H O 2 C O 2 C O 2 H O 2 Gas saving mode OH Operation OUT Gas pump IN Carrier gas outlet Energised solenoid valve coils 30l h 50l h Pressure switch PR4 V1 V4 N yellow V2 Purg e 22 psi 1 5 bar 01 16 0...

Page 172: ...s su re 22 psi V2 11 430 24 VD C gas stop Carrier 230 VA C 2 4 ba r 1 5 ba r 11 390 CO CO furnac e 2 black yellow red green blue 1 5 l h C o n t r o lle d V3 114 35 V4 24V DC 011 60 24V DC IN OUT Gas pump 90F6 14 Carrier gas outlet Energised solenoid valve coils 13 1 O x y g e n a n d N i t r o g e n a n a l y s e r A n a l y s i s m o d e O N 9 0 0 1 5 b ar 0 5 0 2 5 2 1 H O 2 C O 2 1 5 ba r Pres...

Page 173: ... regul ator Pres sure 22 ps i V2 11 430 24VDC gas stop Carrier 230 VAC 2 4 bar 1 5 bar 1139 0 CO CO furnace 2 black yellow red green blue 1 5 l h Co n tr ol l e d V3 1 1435 V4 24V DC 0116 0 24V DC IN OUT Gas pump 90F614 Carrier gas outlet Energised solenoid valve coils 13 2 1 5 ba r 0 5 0 2 5 2 1 H O 2 C O 2 1 5 ba r Pressure switch 22 p s i C O 2 H O 2 O x y g e n a n d N i t r o g e n a n a l y ...

Page 174: ... re gul ato r Pres sur e 22 ps i V2 1143 0 24VD C gas stop Carrier 23 0VAC 2 4b ar 1 5 ba r 11 390 CO CO furnace 2 black yellow red green blue 1 5 l h C o nt r ol l e d V3 1 1435 V4 24V DC 0116 0 24V DC IN OUT Gas pump 90F6 14 Carrier gas outlet Energised solenoid valve coils 13 3 1 5 ba r 0 5 0 2 5 2 1 H O 2 C O 2 1 5 b ar Pressure switch 22 ps i C O 2 H O 2 P u r g e O x y g e n a n d N i t r o ...

Page 175: ... 0 p si PR1 PR2 0 3 5 b ar 5 3 p si re g ula to r Pre ssur e 22 p si V2 1 1 43 0 24 VDC gas stop Carrier 23 0 VAC 2 4 b a r 1 5b a r 11 3 90 1 5 l h C ont r ol l ed V3 1 14 3 5 V4 24V DC 01 1 60 24V DC IN OUT Gas pump 9 0F 61 4 Carrier gas outlet 1 5 b ar 0 5 0 2 5 2 1 H O 2 C O 2 1 5 b a r Pressure switch 2 2 psi C O 2 H O 2 O N 9 0 0 N i t r o g e n o n l y a n a l y s e r A n a l y s i s m o d ...

Page 176: ...Helium 30 60psi PR1 PR2 0 35bar 5 3ps i r egulator Pr essur e 22psi V2 11430 24V DC gas stop Carrier 230VAC 2 4bar 1 5bar 11390 1 5 l h C ont r o l l ed V3 11435 V4 24V DC 01160 24V DC IN OUT Gas pump 90F614 Carrier gas outlet 1 5 ba r 0 5 0 2 5 2 1 H O 2 C O 2 1 5 bar Pressure switch 22 ps i C O 2 H O 2 O N 9 0 0 N i t r o g e n o n l y a n a l y s e r P u r g i n g m o d e Energised solenoid val...

Page 177: ...t r o g e n o n l y a n a l y s e r G a s s a v i n g m o d e Energised solenoid valve coils Carrier Gas Helium 3 0 6 0p s i PR1 PR2 0 35 ba r 5 3 ps i r egu la to r Pre ss ure 2 2p s i V2 114 30 2 4VDC gas stop Carrier 23 0VAC 2 4 b ar 1 5 ba r 113 90 1 5 l h C o n tr o l l e d V3 1 14 35 V4 24V DC 01 160 24V DC IN OUT Gas pump 90F6 14 Carrier gas outlet 1 5 bar 0 5 0 2 5 2 1 H O 2 C O 2 1 5 b a ...

Page 178: ... h V2 H O 2 C O 2 Measure 114 35 V3 24 VDC CO CO furnace 2 13 7 PR2 c o n t r o l l e d 15 l h 1 5 bar 22psi Pressure switch regu la tor Pre ss ure V1 01 16 0 IN OUT Gas pump Carrier gas outlet 2 2 ps i 3 0 6 0p s i regu la tor Pre ss ure Carrier Gas Nitrogen Energised solenoid valve coils 2 4 ba r 1 5 ba r O N 9 0 0 A n a l y s i s m o d e O x y g e n o n l y a n a l y s e r 11 390 PR1 V5 gas sto...

Page 179: ...4 35 V3 2 4VDC CO CO furnace 2 13 8 PR2 c o n t r o l l e d 15l h 1 5 bar 22psi Pressure switch reg u lato r Pressure IN OUT Gas pump Carrier gas outlet 22psi 30 60psi re gu la tor Pre ssu re Carrier Gas Nitrogen Energised solenoid valve coils 2 4bar 1 5bar 1 13 90 PR1 V5 gas stop 2 30 VAC Carrier black red yellow O N 9 0 0 P u r g i n g m o d e O x y g e n o n l y a n a l y s e r Purge Purge P u ...

Page 180: ...4 35 V3 2 4VDC CO CO furnace 2 13 9 PR2 c o n t r o l l e d 1 5 l h 1 5 bar 22psi Pressure switch r e gu la tor Pr essu re IN OUT Gas pump Carrier gas outlet 2 2 ps i 3 0 6 0 p si r eg u lato r Pr essur e Carrier Gas Nitrogen Energised solenoid valve coils 2 4 b a r 1 5 b ar 1 13 90 PR1 V5 gas stop 2 30 VAC Carrier black red yellow P u rg e va lve V1 0 11 6 0 2 4VDC G a s s a v i n g m o d e O x y...

Page 181: ... January 2002 Service Manual OH 900 ON 900 ONH 2000 4 4 1 4 4 4 4 Purging of the chopper ge 2 2 33300 C O H O I N L E T C O 2 2 H O g e O N I N S T R U M E N T O I N S T R U M E N T I R C e l l I R C e l l Fa n le ft si d e 4 4 1 ...

Page 182: ...ction see 2 8 Check lower electrode Is the pressure switch change set to 1 0 bar 15 psi see 2 2 Does the thermostabilisation of the IR cell and TC cell work correctly see 2 5 and 2 14 Check the cooling system for leaks Does the left side gas flow meter indicate 30 l h Does the right side gas flow meter indicate 15 l h Check the power regulation see 2 16 Check the water temperature cut off system s...

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ELTRA OH-900, Service Manual

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