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Rosemount 890, Инструкция по эксплуатации

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R

OUTINE 

S

ERVICE

Rosemount Analytical

748460-A

January 2000

6-10

6.4  ELECTRONIC CIRCUITRY

6.4.1

  

P

OWER 

S

UPPLY BOARD

The Power Supply Board provides voltages required by the various circuit boards (+5
V, 

±

15 V, -12 V).  In addition, it provides:  a)  constant current to drive the UV lamp;  b)

 constant voltages for the lamp heater; c)  proportional temperature control for the
case heater; and d)  circuitry for the isolated current output.

6.4.2  S

IGNAL 

B

OARD

The Signal Board provides the processing of the four detector signals and timing for
the pulsed UV lamp, and includes the integrator.  The Signal Board includes:  a)  The
Zero Suppression circuit;  b)  the Span adjustment;  c)  temperature compensation for
Zero and Span;  d) the programmable gain amplifier;  and e)  the 8-channel multiplexer
for processing the different signals.

6.4.3  P

REAMPLIFIER 

B

OARD

There are four identical Preamplifier Boards, one for each detector.  The board
contains the silicon photodiode detector, which converts the UV radiation into a
current, and an amplifier that converts the current into voltage.

6.4.4  A

DAPTER 

B

OARD

The Adapter Board (which includes a circuit breaker) is for line power distribution.  The
Adapter Board also serves as an interface board for all the option boards and provides
the recorder output (TB2).

6.4.5  M

ICRO 

B

OARD

The Micro Board is a self-contained circuit assembly which includes an advanced
microprocessor and multiple I/O functions with a complete analog domain consisting of
analog-to-digital converters and digital-to-analog converters.  Multiple output registers
allow the transmission of digital data to and from the board under program control. 
The board can be used alone or in conjunction with I/O boards that satisfy interfacing
requirements such as the following:

1.  Bi-directional Remote Range I/O Board
2. Dual Alarm
3. Auto Zero/Span
4.  Calibration Gas Control

The board is configured with an analog domain that allows the processing of analog
signals directly with a 12-bit, plus sign ADC.  Also, two independent DACs, each 12-
bits wide, allow the presentation of analog voltages for peripheral functions
immediately.

Содержание 890

Страница 1: ...Rosemount Analytical MODEL 890 UV ANALYZER INSTRUCTION MANUAL 748460 A ...

Страница 2: ...ted in U S A Rosemount Analytical Inc 4125 East La Palma Avenue Anaheim California 92807 1802 Teflon and Viton are registered trademarks of E I duPont de Nemours and Co Inc Suprasil II is a registered trademark of Heraeus Amersil Inc Pyrex is a registered trademark of Corning Glass Works SNOOP is a registered trademark of NUPRO Co ...

Страница 3: ...neral Description 1 1 1 2 Available Options 1 3 SECTION 2 UNPACKING AND INSTALLATION 2 1 Check for Shipping Damage 2 1 2 2 Location 2 1 2 3 Voltage Requirements 2 1 2 4 Electrical Connections 2 2 2 4 1 Line Power Connections 2 2 2 4 2 Recorder Connections 2 3 2 5 SAMPLE INLET OUTLET CONNECTIONS 2 4 2 6 CALIBRATION GAS REQUIREMENTS 2 5 2 7 SAMPLE HANDLING SYSTEM 2 5 2 8 LEAK TEST PROCEDURE 2 5 2 9 ...

Страница 4: ...libration 3 11 3 10 Zero Calibration for the Analyzer with the Calibration Gas Control Option 3 13 3 11 Span Calibration 3 13 3 12 Span Calibration for the Analyzer with the Calibration Gas Control Option 3 14 3 13 Linearization 3 14 3 14 Alarm 3 19 3 14 1 STATUS Display 3 21 3 15 Current Output 3 22 3 16 Auto Zero Span Option 3 22 3 17 Remote Range input Output Option 3 26 3 18 Interference Balan...

Страница 5: ... 1 Power Supply Board 6 10 6 4 2 Signal Board 6 10 6 4 3 Preamplifier Board 6 10 6 4 4 Adapter Board 6 10 6 4 5 Micro Board 6 11 6 4 6 Case Heater Temperature Control 6 11 6 4 7 Dual Alarm Calibration Gas Control Board Option 6 11 6 4 8 Isolated Remote Range I O Board Option 6 11 6 4 9 Auto Zero Span Board Option 6 11 SECTION 7 REPLACEMENT PARTS 7 1 CIRCUIT BOARD REPLACEMENT POLICY 7 1 7 2 SELECTE...

Страница 6: ...urve 3 16 3 10 Concentration Curve 3 18 3 11 Curve Normalized 3 18 3 12 Alarm Option 3 20 3 13 Status Display 3 21 3 14 Current Output Mode 3 22 3 15 Auto Zero Span 3 25 3 16 Remote Input Output 3 26 4 1 Model 890 Timing Diagram 4 2 6 1 Optical Bench 6 2 6 2 Sample Cell Assembly 6 3 6 3 Collector Block Exploded View 6 5 6 4 Detector Block Exploded View 6 6 6 5 Lamp Assembly 655000 6 7 6 6 Lampl Al...

Страница 7: ...51 Schematic Diagram Remote Control 624599 Scheamtic Diagram Auto Zero Span 652687 Schematic Diagram Signal Board SO2 652715 Diagram Electrical Interconnect SO2 652807 Schematic Diagram Power Supply Board 652857 Schematic Diagram Preamplifier Board SO2 654853 Installation Drawing Model 890 656137 Schematic Diagram Signal Board Cl2 656138 Schematic Diagram Preamplifier Board Cl2 656911 Diagram Elec...

Страница 8: ...CONTENTS VI 748460 A Rosemount Analytical January 2000 NOTES ...

Страница 9: ...or substantial property damage if the warning is ignored CAUTION is used to indicate the presence of a hazard which will or can cause minor personal injury or property damage if the warning is ignored NOTE is used to indicate installation operation or maintenance information which is important but not hazard related Do not operate without doors and covers secure Servicing requires access to live p...

Страница 10: ...heck instructions are provided in Section 2 8 Internal leaks resulting from failure to observe these precautions could result in an explosion causing death personal injury or property damage Tampering or unauthorized substitution of components may adversely affect safety of this product Use only factory documented components for repair Ultraviolet light from the source lamp can cause permanent eye...

Страница 11: ...safety stop latch located on the left side of the chassis When extracting the chassis verify that the safety latch is in its proper counter clockwise orientation If access to the rear of the chassis is required the safety stop may be overridden by lifting the latch however further extraction must be done very carefully to insure the chassis does not fall out of its enclosure If the instrument is l...

Страница 12: ...e in 0 5 sec to 20 sec field selectable application dependent SENSITIVITY SO2 0 1 ppm Cl2 0 2 ppm INTERFERENT REJECTION Discrimination ratio for NO2 is 1000 1 for SO2 applications ANALOG OUTPUT Standard 0 to 5 VDC and 0 to 20 mA 4 to 20 mA DC isolated maximum load 700 ohms LINEARIZATION Keypad entered coefficients for linearizing 1 2 or all 3 ranges POWER REQUIREMENTS 115 230 VAC 10 50 60 Hz 350 W...

Страница 13: ...PUTS Two form A contact closures for indication of insufficient zero and span adjustment rated resistive load Max switching power 10 Watts Max switching voltage 30 VDC Max switching current 0 5 A REMOTE INPUT OUTPUT Three remotely changeable ranges with positive identification RANGE CHANGE Binary or decimal field selectable AUTO ZERO SPAN Auto Cal request and status RELAY OUTPUTS Eight form A cont...

Страница 14: ...ized returns will be returned to the sender freight collect When returning any product or component that has been exposed to a toxic corrosive or other hazardous material or used in such a hazardous environment the user must attach an appropriate Material Safety Data Sheet MSDS or a written certification that the material has been decontaminated disinfected and or detoxified Return to Rosemount An...

Страница 15: ...ations from the European Legislation to harmonize the product requirements in Europe This product complies with the standard level of NAMUR EMC Recommendation May 1993 This product satisfies all obligations of all relevant standards of the EMC framework in Australia and New Zealand MODEL 890 Cl2 ANALYZER The Model 890 Cl2 Analyzer is intended for sampling only non hazardous gases in non hazardous ...

Страница 16: ...PREFACE Rosemount Analytical January 2000 748460 A P 8 NOTES ...

Страница 17: ...nge for SO2 and 100 to 5 000 ppm for Cl2 FIGURE 1 1 MODEL 890 ANALYZER OPTICAL BENCH The ultraviolet source emits a pulsed 30 Hz beam of energy This energy is split by a beam splitter each beam being directed to pairs of detectors before and after the sample cell One of the unique features of the Model 890 is the use of spectrally selective Transflectance mirrors These mirrors isolate the sample a...

Страница 18: ...onent of interest COI concentration and correct for NO2 interference and UV lamp fluctuations The difference between detector determinations is the COI concentration following this formula COI f Rb Sb f Ra Sa where Ra Rb Sa Sb signals from those detectors so identified f attenuation factor for the reference signal adjusted to compensate for NO2 interference The sample gas is introduced to the samp...

Страница 19: ...uitry By turning the linearizer ON and entering the correct coefficients an output linear with concentration is obtained 1 2 AVAILABLE OPTIONS Operation of the Model 890 can be enhanced with the choice of several options DUAL ALARMS STANDARD AND FAIL SAFE User set dual alarms are available with configurable HI LO designations and deadband AUTO ZERO SPAN An Automatic Zero Span Option is available f...

Страница 20: ... 1 4 nonflammable gases If the analyzer is used to sample a flammable gas it must be protected by a continuous dilution purge system per standard ANSI NFPA 496 1993 Chapter 6 or IEC publication 79 2 1983 Section Three Consult factory for further information ...

Страница 21: ... Division 2 area as defined by the National Electrical Code ANSI NFPA 70 This kit is designed to provide Type Z protection in accordance with Standard ANSI NFPA 496 1993 Chapter 2 when sampling nonflammable gases For flammable samples the instrument must be equipped with a continuous dilution purge system in accordance with ANSI NFPA 496 1993 Chapter 6 Consult factory for recommendations concernin...

Страница 22: ...le through the cable gland and connect to appropriate connector or terminal strip as shown in Drawings 654853 and 652715 Then tighten the gland 2 4 1 LINE POWER CONNECTIONS If this instrument is located on a bench or table top or is installed in a protected rack panel or cabinet power may be connected to it via a 3 wire flexible power cord minimum 18 AWG max O D 0 480 min O D 0 270 through hole F ...

Страница 23: ...nd adequately to prevent rotation or slippage of the power cable Since the rear terminals do not slide out with D 0 the chassis no excess power cable slack is necessary FIGURE 2 2 CABLE GLAND CONNECTION 2 4 2 RECORDER CONNECTIONS Recorder connections are made to the rear panel Refer to Drawings 654853 652715 and 656139 Route the recorder cable through the cable gland and connect to TB2 Recorder an...

Страница 24: ...to its original source or an appropriate outside vent using inch 6mm tubing minimum This analyzer is of a type capable of analysis of sample gases which may be flammable If used for analysis of such gases the instrument must be protected by a continuous dilution purge system in accordance with Standard ANSI NFPA 496 1989 Chapter 8 If explosive gases are introduced into this analyzer the sample con...

Страница 25: ...r for flow measurement and or indication of flow stoppage and filter s to remove particulate matter 2 8 LEAK TEST PROCEDURE This analyzer is capable of analyzing sample gases which may be flammable If used for analysis of such gases the instrument must be protected by a continuous dilution purge system in accordance with Standard ANSI NFPA 496 1989 Chapter 8 If explosive gases are introduced into ...

Страница 26: ...used for the measured sample as well as for the zero gas and span gas Note that at higher flow rates the nonlinearity of the calibration curve increases because of increase in sample cell pressure Therefore if higher flow rates are required the calibration curve should be redrawn at the higher rate At flows up to 2 CFH 1 L min gaseous sample temperatures are equilibrated to instrument temperature ...

Страница 27: ...ble customer supplied to the 6 pin connector J2 The Cal Gas Control Option consists of two form C contacts rated 3A 125 250 VAC or 5A 30 VDC resistive Run the cable through the cable gland and tighten the latter once the connector has been secured Figure 2 2 Note The Dual Alarm Fail Safe Alarm and Calibration Gas Control use the same board However the jumpers locations are different Cal Gas Contro...

Страница 28: ...m switching power 200 VDC maximum switching voltage and 0 5 A maximum switching current Run the cable through the cable gland and tighten once the connector has been secured Figure 2 2 If installed this board can also be activated from the keyboard Zero Span for the selected range FIGURE 2 4 AUTO ZERO SPAN CONNECTIONS 1 U4 K5 J1 1 U2 U3 RP1 U1 1 1 1 1 E4 E2 E1 CR1 R4 CR2 FT2 K2 R5 FT3 CR3 K3 R6 J2...

Страница 29: ...switching voltage and 0 5 A maximum switching current The signal input is at J3 which consists of eight optocouplers operated from a user supplied 24 VDC power source Run the cable through the cable gland and tighten once the connector has been secured Figure 2 2 FIGURE 2 5 REMOTE INPUT OUTPUT OPTIONS J1 1 RP2 E4 E2 E1 J2 J3 C4 R12 C1 C3 RP1 CR1 R13 C5 R11 R2 R1 E5 E6 E7 E9 E8 K1 K2 K3 K4 K5 K6 K7...

Страница 30: ...des which are inserted into predrilled holes in the card cage Mount the option in the card guides and follow the wiring directions in section 2 10 There are five connectors on the interconnect cable It is important for the slot to be connected to the correct connector on the interconnect cable To install any of the above kits the Common Parts Kit PN 624414 must be ordered if not originally ordered...

Страница 31: ... the analyzer 3 1 LEAK TEST Perform the Leak Test Procedure in Section 2 8 3 2 POWER VERIFICATION 1 Verify power switch settings are for available power 115 VAC 230 VAC Refer to Section 2 2 Apply power On the Power Supply Board verify that heater LED D6 is ON Refer to Figure 2 1 FIGURE 3 1 MODEL 890 ADJUSTMENTS Power Supply Board Option Boards Gain Adjust R3 Display Contrast Adjust R8 Signal Board...

Страница 32: ...he display consists of a 16 character backlighted Liquid Crystal Display The contrast on the display may be adjusted so that the display can be read from any vertical angle This adjustment is made by loosening the two screws on the front of the case and sliding the front panel forward then turning the potentiometer R8 to adjust the contrast until the best view of the display is obtained See Figure...

Страница 33: ...SHIFT F1 and SHIFT F2 The computer acknowledges the keystrokes by flashing KEY SAVED on the display These four functions can immediately access a particular display for the following modes Range Diagnostics Linearization Alarm Current Output Auto Zero Span or Remote Range I O To display instrument functions The standard functions are security range diagnostics current output and linearization Addi...

Страница 34: ... access any frequently used display or sub menu for the following modes Range Diagnostics Linearization Auto Zero Span Remote Range I O or Alarm provided the option board selected is still present To use this feature the function keys must be preprogrammed by the user through the following steps 1 Access a display or sub menu that will be frequently used by following the steps in the particular se...

Страница 35: ...N MODE DISPLAY The RUN mode is the normal mode of operation In this mode the display will show current process value component designation control mode and range Should an error condition or an alarm condition occur ER where is an alphanumeric character or AL where is either the number 1 or 2 will flash on the display in the component name location A list of error messages is located in Section 5 ...

Страница 36: ...nd then exits the screen 3 5 ACCESSING MODE DISPLAYS Ensure that all MODE displays are functional and that all options ordered from the factory are present by following the flow chart in Figure 3 4 To follow the logic flow chart use the following steps Note For more detailed instructions refer to Figures 3 5 through 3 8 3 11 and 3 13 through 3 15 1 Press MODE 2 Use the key to move to the desired s...

Страница 37: ...nt Analytical January 2000 FIGURE 3 4 LOGIC FLOW CHART MODE RUN MODE SECURITY RANGE AUTO CAL and will return analyzer to Run Mode Will enter displayed mode function ENTER SHIFT ENTER REMOTE I O DIAGNOSTICS LINEARIZER CURRENT OUTPUT ALARM INTERFERENCE CAL ...

Страница 38: ... to RUN MODE SHIFT SHIFT ENTER 3 6 SECURITY CODE See Figure 3 5 The Model 890 is equipped with a security code feature which is deactivated when the instrument is shipped from the factory When the security feature is activated only the STATUS and MODE function keys are active to access the STATUS and SECURITY displays A valid password must be entered to activate the rest of the keyboard This passw...

Страница 39: ...N Cal Gas Span CAL GAS ppm If user has changed displayed data WAIT CALCULATING FIGURE 3 6 RANGE MODE 3 7 RANGE PARAMETERS RANGE SELECTION See Figure 3 6 There are several range parameters that may be changed The first display RANGE CMP NNN allows RANGE 1 RANGE 2 or RANGE 3 to be selected with the or key Of these three independent ranges RANGE 3 should always be the least sensitive range highest fu...

Страница 40: ...ullscale spans Thus if range 1 is 0 to 50 ppm and range 3 is 0 to 500 ppm then the respective gains will usually be 8 and 1 If 5000 ppm is being measured gain is x1 and the instrument is set for Low RANGE FULLSCALE In the FS XXXX ppm or FS XX X display up to a four digit fullscale value is entered in ppm parts per million Note The instrument will not allow the user to enter a fullscale value in th...

Страница 41: ...s to be displayed It is recommended that the values for samples SA and SB and references RA and Rb be recorded for future reference to help track lamp life See Figure 3 7 3 9 ZERO CALIBRATION The Model 890 Analyzer automatically calculates zero when the analyzer is in the zero setpoint mode Simply press ZERO display notes ZERO WAIT and then ZR XX PS XX Ensure that zero gas is flowing through the c...

Страница 42: ...ft one character at a time and will return analyzer to RUN MODE SHIFT ENTER SHIFT 5 15V XX X SHIFT SHIFT 15V XX X 5 5 12V XX X SAMPLE A X XXX SHIFT DET SIG X XX 300 mA 10mA SHIFT SRC CUR XXXmA ENTER DIAGNOSTICS SHIFT REF A X XXX 5 SHIFT REF B X XXX SAMPLE B X XXX SHIFT 5V X X SHIFT FIGURE 3 7 DIAGNOSTICS MODE ...

Страница 43: ...FT ENTER to exit To calibrate the analyzer with the Cal Gas Control Option 1 Allow system to warm up a minimum of one hour 2 Connect the solenoid valve for the zero gas to the two form C contacts Connect the zero gas to the sample cell inlet located on the back of the analyzer The gas should flow at a rate of 500 cc min as read on a flowmeter for at least two minutes 3 To calibrate the zero settin...

Страница 44: ...TION FOR THE ANALYZER WITH THE CAL GAS CONTROL OPTION The Calibration Gas Control Option allows one man calibration This option consists of two form C contacts rated 3A 125 250 VAC or 5A 30 VDC resistive These contacts are connected to solenoid valves customer supplied which will turn zero and span calibration gases ON OFF when activated Simply press SPAN to open the appropriate valve thus allowin...

Страница 45: ...T ENTER if displayed data was modified Note SO2 ranges from 0 to 50 ppm through 0 to 200 ppm and Cl2 ranges from 0 to 1000 ppm through 0 to 200 ppm are linear within 1 accuracy and do not require correction although their linearities are improved with the fourth order polynomial corrections The uncorrected 0 to 5000 ppm range is very non linear but is corrected to better than 1 of fullscale with a...

Страница 46: ...ange are automatically used independent of the position of Range n from the Linearization Mode except for the ALL Range selection FULLSCALE A0 A1 A2 A3 A4 50 ppm 0 00016 0 96898 0 06899 0 08882 0 05043 100 ppm 0 00015 0 95033 0 07541 0 01677 0 00861 250 ppm 0 00014 0 92430 0 05284 0 06604 0 04362 500 ppm 0 00023 0 87214 0 03032 0 20556 0 10857 1000 ppm 0 00012 0 76590 0 11188 0 18932 0 06724 2500 ...

Страница 47: ... A3 0 00000 A4 0 00000 To calculate linearization coefficients other than those installed at the factory either 11 or 21 data points should be taken If urgent a curve can be created with as few as 4 points This should be considered temporary and a more accurate curve made with more points should be created as soon as possible These data points can be obtained with an accurate gas divider or other ...

Страница 48: ...ry to have the specific coefficients calculated When entering user determined coefficients note that the microprocessor only recognizes five significant figures to the right of the decimal point i e 0 12345 Also the user should ignore the three non significant digits as they may change value while the significant digits are being changed The values of the non significant digits do not affect the i...

Страница 49: ...he latch is reset The high alarm is determined when RUN mode value exceeds the alarm setpoint The alarm is cleared when run mode value is less than alarm setpoint minus the deadband The low alarm is determined when the run mode value is less than the alarm setpoint This alarm is cleared when the run mode value is greater than the alarm setpoint plus the deadband ALARM 1 and ALARM 2 can be toggled ...

Страница 50: ...HIFT ENTER ENTER DEADBAND XX Toggle between high set and low set and adjust value HIGH SET XXXX Select Range 1 2 or 3 for the alarm Alarm only valid for selected range Selecting a range disables alarm for other two ranges SHIFT RANGE X ALARM X MAN OFF ENTER NOT INSTALLED Toggle between X 1 or 2 and between MAN manual and AUTO automatic ALARM SHIFT SHIFT DATA STORED RUN MODE Change deadband value u...

Страница 51: ... MODE functions HIGH LOW AUTO MANUAL and ON OFF The order of priority for error messages security status and alarms is as follows SECURITY ENABLED DISABLED ERL EL LIN COEFF ERR E0 ZERO POT LMTS E1 R1 SP POT LMTS E2 R2 SP POT LMTS E3 R3 SP POT LMTS E4 ADC SATURATED E5 ZERO DRIFT E6 SPAN DRIFT E7 GAIN TOO HIGH RMT R L ALARM 1 AUTO MAN ON OFF ALARM 2 AUTO MAN ON OFF CAL CTL PRESENT AUTOCAL ON OFF CUR...

Страница 52: ... analyzer defaults to the 0 to 100 range Refer to Figure 3 14 FIGURE 3 14 CURRENT OUTPUT MODE 3 16 AUTO ZERO SPAN Refer to Figure 3 15 The Auto Zero Span allows automatic unattended calibration at set intervals The option has six contact closures four of which are field programmable for frequency and duration of the calibration cycle span 1 span 2 span 3 and zero Meanwhile the other two contact cl...

Страница 53: ...time During the remaining purge time the signal is modified according to previous calibration data The repeat zero RPT ZERO nnn HR display allows the user to select the amount of time between zero calibrations This is the amount of time after the initial calibration before the zero calibration is repeated without repeating the span calibration Note Each time an auto span calibration is made a zero...

Страница 54: ...desired on the bottom scale and find the corresponding Recorder Deflection value on the side scale These are the values that should be entered in ZR DFT XX or S DFT R XX The reference span or zero calibration is the first calibration after the drift feature is toggled to ON in the DRIFT LIMIT display or the first calibration after a range is reset from N off to Y on in the Range 1Y 2Y 3Y display i...

Страница 55: ...may use to return to previous screen display if desired Press ENTER with cursor under changed value to store in nonvolatile memory and will move cursor right left one character at a time and will change toggle settings and will go to next function and will return analyzer to RUN MODE SHIFT SHIFT ENTER RANGE 1Y 2Y 3Y PURGE nn MIN DELAY nn HR Toggle between ON and OFF to activate Auto Zero Span feat...

Страница 56: ...sult factory 3 17 REMOTE RANGE INPUT OUTPUT Refer to Figure 3 16 The Model 890 Analyzer has optional remote input output capability When the Remote Range Input Output is switched to REMOTE in the RUN mode the range indicator at the right corner of the display will be R instead of L Refer to Tables 3 2 and 3 3 for explanations of BIN binary and DEC decimal When SPECIAL is selected only autocal stat...

Страница 57: ... selection in remote 4 Range I D 4 Not Used 5 Not Used 5 Not Used 6 Not Used 6 Not Used 7 Not Used 7 Auto Cal request 8 AUTO CAL status 8 Not Used 9 REMOTE LOCAL status 9 Common Note The Auto Cal request input is level triggered therefore it is the responsibility of the user to verify that the input is brought low before the analyzer completes the Auto Cal process MODE RANGE J3 PIN 3 J3 PIN 2 J3 P...

Страница 58: ...changed drastically from the original composition The balance adjustment is an electronic adjustment If the interference setting is changed the balance potentiometer can be used to balance the system This is a fine adjustment If more adjustment than the potentiometer can provide is necessary the iris can be used to balance the system to zero See Section 5 2 Cl2 Measurement Use of the Model 890 for...

Страница 59: ...tric pressure i e a change in cell pressure of 10 mm of mercury will result in a readout error of approximately 1 of reading Therefore if barometric pressure changes significantly it is advisable to recheck the calibration against an upscale standard gas 4 3 SHUTDOWN The Model 890 will retain settings during prolonged shutdown Recalibrate the instrument upon restart 4 4 DETECTION SYSTEM THEORY The...

Страница 60: ...ed with the four detector multiple wavelength analysis technique described above a unique detector output signal integration and de integration signal processing scheme allows a continuous on line correction of dark current and electronic noise errors This effectively resets the electronic zero every 30 milliseconds and yields a measurement which is virtually free of instability and drift See Figu...

Страница 61: ...equired to make a software zero The zero potentiometer cannot compensate System must be balanced with iris adjustment See Section 5 2 ER1 E1 R1 SP POT LMT ER2 E2 R2 SP POT LMT ER3 E3 R3 SP POT LMT Span errors for Range 1 Range 2 or Range 3 Software span is outside limits so that the rum mode value is not between 51 and 100 of the span gas value while in the Span Mode Check gain settings ER4 E4 ADC...

Страница 62: ...s 1 Follow the steps for spanning the analyzer in Sections 3 11 standard analyzer or 3 12 analyzer with the Calibration Gas Control Option and span the analyzer If the Run Mode value is not between 51 and 100 of the span gas value while keeping the span potentiometer between 5 and 95 then the digital GAIN must be adjusted The ideal span potentiometer setting is 50 Note the final value of the PS po...

Страница 63: ...ppm on a fullscale of 5 ppm the ERL message will not appear But when the user attempts to span the range with this value the ER SPAN POT LMTS error message will appear instead To correct this condition do the following 1 The user should cross reference the linearizer coefficients entered with those provided by the factory or those the user has calculated Re enter them properly Exit into the Run Mo...

Страница 64: ...TROUBLESHOOTING Rosemount Analytical 748460 A January 2000 5 4 NOTES ...

Страница 65: ...should break down or moisture solids or other contaminates are introduced cell will require cleaning CELL CLEANING 1 Disconnect power to the analyzer 2 Pull the chassis out of the analyzer case and locate the optical bench See Figures 6 1 and 6 2 3 Refer to Figure 6 1 Remove block A Remove the cell Note The cell interior is glass Handle the cell with caution to avoid damaging or breaking it 4 Note...

Страница 66: ...and eye protection when using acetone 6 Clean the cell and end cap windows with an appropriate solution such as acetone followed by alcohol and distilled water rinses Blow surfaces dry with nitrogen 7 Reassemble the cell by realigning the end caps and replacing the screws 8 Check the condition of the o rings replace if deformed or damaged 9 Reassemble the cell into block A FIGURE 6 1 OPTICAL BENCH...

Страница 67: ...nse with alcohol and then distilled water Blow dry with nitrogen Acetone is highly flammable and moderately toxic Use only in a well ventilated flame free non smoking location Avoid prolonged inhalation of vapors headache dizziness and irritation of the eyes nose and throat may occur Avoid contact with skin mild irritation may occur Use rubber gloves and eye protection when using acetone FIGURE 6 ...

Страница 68: ...curing the lamp assembly to the collector block 7 Refer to Figure 6 5 Remove the two screws item A Loosen the screw marked item B and remove the lamp from the housing 8 Remove the two springs marked item C 9 Remove the clamp marked item D 10 Place the clamp on the new lamp and secure 1 1 inches from the center of the square aperture centerline marked item E Do not overtighten 11 Install the lamp w...

Страница 69: ...Retaining Ring 901933 Washer 657773 Beamsplitter 654958 Beamsplitter Holder 854819 Retaining Ring 901933 Washer 657772 Filter Mirror note 1 Collector Handle 654956 Collector Filter Mirror Holder 654817 Spherical Mirror 654841 Mirror Plate 654845 Retaining Ring 901932 Aperture Gasket 654953 Aperture Cap 654872 Aperture 901981 Washer 654954 Retaining Ring 901932 Collector Housing 657771 ...

Страница 70: ... VIEW F Retaining Ring 901933 Washer 657772 Filter Mirror note 1 Filter Mirror note 2 Spring Washer 901939 Filter Mounting Plate 654816 Filter Holder 654826 Preamp Gasket 654823 Preamp Board note 3 O Ring 856389 Preamp Gasket 654823 Preamp Board note 3 O Ring 856389 Filter Holder 654820 Spherical Mirror 654841 Mirror Plate 654815 Retaining Ring 901932 Detector Housing 654831 ...

Страница 71: ...s securing the lamp housing to the collector housing to allow vertical adjustment of the lamp housing 3 Power up the analyzer for a minimum of 15 minutes 4 Set the analyzer to Range 3 and the gain to 1 low 5 Enter DIAGNOSTICS mode verify that source current is 300 mA 10 mA and all power voltages are 5 12 15 and 15V each 5 6 Display the Sample A screen still in DIAGNOSTICS mode Adjust the horizonta...

Страница 72: ... Detector Signal screen in DIAGNOSTICS mode and adjust the iris for 0 mV 5 mV The cover Figure 6 6 protects the iris from accidental movement 10 In RANGE mode set the gain to 1 high and repeat step 9 for 0 mV 10 mV 11 In DIAGNOSTICS mode verify the detector signals are the following for a new lamp Sample A 5 V 0 7 V Sample B Sample A 200 mV Reference A 75 to 85 of Sample B Reference B Reference A ...

Страница 73: ...et and blow dry with clean dry nitrogen or dry oil free air If after repeated attempts the mirror still appears contaminated wet the mirror with cleaning fluid and gently rub with a clean wet optical cleaning tissue Rinse and blow dry Repeat if necessary 6 3 2 BEAM SPLITTER FOCUSING MIRRORS The procedure for cleaning the beam splitter and focusing mirrors is the same as Section 6 3 1 except Under ...

Страница 74: ...ch converts the UV radiation into a current and an amplifier that converts the current into voltage 6 4 4 ADAPTER BOARD The Adapter Board which includes a circuit breaker is for line power distribution The Adapter Board also serves as an interface board for all the option boards and provides the recorder output TB2 6 4 5 MICRO BOARD The Micro Board is a self contained circuit assembly which includ...

Страница 75: ...ed to connect user supplied solenoid valves to zero and span calibration gases for one man calibration Provision is made for assigning a specific address in the range 0 through 7 using jumpers See Table 6 1 6 4 8 ISOLATED REMOTE RANGE I O BOARD OPTION The Remote Range I O Board is a peripheral circuit function which communicates with the computer via an 8 bit bus arrangement This provides isolated...

Страница 76: ...ry 2000 6 12 OPTION ADDRESS CONFIGURATION FUNCTION CONFIGURATION Dual Alarm E1 E2 E5 E7 E9 E10 Dual Alarm Fail Safe E1 E2 E5 E7 E8 E10 Cal Gas Control E1 E4 E5 E7 E9 E10 Auto Zero Span E1 Isolated Remote I O E4 TABLE 6 1 JUMPER CONFIGURATION FOR OPTIONS ...

Страница 77: ...of a circuit board it is more practical to replace the board than to attempt isolation and replacement of the individual component The cost of test and replacement will exceed the cost of a rebuilt assembly As standard policy rebuilt boards are available on an exchange basis Because of the exchange policy covering circuit boards the following list does not include individual electronic components ...

Страница 78: ...irror 310nm Cl2 1 656213 Filter Mirror 355nm Cl2 2 656214 Filter Mirror 400nm Cl2 2 654841 Spherical Mirror 3 654958 Beamsplitter 1 7 3 LAMP REPLACEMENT The ultraviolet lamp is a consumable part that has an average lifetime of 6 months When the lamp reaches 50 intensity it should be replaced See Figure 7 3 for a lamp life vs intensity chart The instrument s software monitors the UV lamp source cur...

Страница 79: ...90 COMPONENT LOCATIONS Micro Board 623785 Display 654859 Front Panel 654860 Signal Board 652690 Heatsink 654862 Transformer 652717 Heater Fan 654867 Power Supply Board 652810 EMC Option 657804 Card Cage Option Boards Option Board The Card Cage and Option Board shown for reference only ...

Страница 80: ... BENCH SENSOR LOCATIONS FIGURE 7 3 UV LAMP LIFE VS INTENSITY INTENSITY TIME months 6 30 40 50 100 Temperature Sensor 654868 locate approximately as shown Temperature Sensor 654868 Temperature Sensor 622917 position 7 5 inches from inside face of optical block Temperature Sensor 654868 ...

Страница 81: ... to be used 4 Avoid dragging rolling or sliding cylinders even for a short distance they should be moved by using a suitable hand truck 5 Never tamper with safety devices in valves or cylinders 6 Do not store full and empty cylinders together Serious suckback can occur when an empty cylinder is attached to a pressurized system 7 No part of cylinder should be subjected to a temperature higher than ...

Страница 82: ... or from any other cause All other warranties expressed or implied are hereby excluded IN CONSIDERATION OF THE HEREIN STATED PURCHASE PRICE OF THE GOODS SELLER GRANTS ONLY THE ABOVE STATED EXPRESS WARRANTY NO OTHER WARRANTIES ARE GRANTED INCLUDING BUT NOT LIMITED TO EXPRESS AND IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Limitations of Remedy SELLER SHALL NOT BE LIAB...

Страница 83: ...r Please have the following information when you call Model Number Serial Number and Purchase Order Number or Sales Order Number Prior authorization by the factory must be obtained before returned materials will be accepted Unauthorized returns will be returned to the sender freight collect When returning any product or component that has been exposed to a toxic corrosive or other hazardous materi...

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