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Rosemount Analytical 880A, Инструкция по эксплуатации

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R

OUTINE 

S

ERVICING

6-10

 October 1999          Rosemount Analytical          748250-L

Model 880A Non-Dispersive Infrared Analyzer

The diaphragm now pulses cyclically, causing the resonance curve to move
continuously back and forth within the limits defined by Curves 2 and 3 of Figure 5-2B.
Carrier amplitude decreases as the curve moves to the right and increases as it moves
to the left. Thus, the response characteristics of the system depend on the location of
Curve 2. Position of this curve depends on the degree of tank-circuit detuning used.

By detuning to 75% to 80% of the maximum obtainable carrier amplitude and
operating on the portion of the curve thus obtained, maximum slope yields highest
sensitivity and minimum curvature provides best linearity.

6.8.4  R

ADIO

-F

REQUENCY 

D

EMODULATOR

The amplitude-modulated 10 MHz carrier from the detector/oscillator circuit is applied
to the radio-frequency demodulator. This circuit is a voltage-doubler type rectifier
utilizing diodes CR1, CR2, CR3, CR4 and capacitor C7. The circuit gives
approximately double the output voltage of a conventional halfwave rectifier. This
result is obtained by charging a capacitor during the normally wasted half-cycle, and
then discharging it in series with the output voltage during the next half-cycle.

6.8.5  S

IGNAL 

B

OARD 

(DWG 624085)

The 5 Hz sinewave detector signal goes through an AC amplifier U1A and associated
resistor. The output signal goes through bandpass filter network U2 and U4 to remove
harmonics and distortion. The signal next goes through a precision signal rectifier U3
and Q1 and then through low pass filter U5. This output goes through an RC low pass
filter R29, C13 and U7 and then to inverting buffer amplifier U8 with zero control U11.

The signal goes through a range amplifier consisting of eight bit DAC U9 and the
amplifier U10.

The GAIN is digitally controlled via U15, U16 and U18 resulting in a selectable digital
GAIN of X1, X2, X4 and X8.

The span is controlled for the three ranges with SPAN 1 (U12), SPAN 2 (U13) and
SPAN 3 (U14).

The eight-channel multiplexer (U17) selects the input signals by commands applied to
the switch driver and feeds the selected signal to pin two of J2.

6.8.6  P

OWER 

S

UPPLY 

B

OARD 

(DWG 655137)

The power supply board supplies the different voltages to the various boards.
Additionally, the power supply board includes an adjustable source driver circuit, a
chopper motor driver circuit, a proportional temperature controller circuit and a DC to
AC converter for backlight.

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Содержание 880A

Страница 1: ...l service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE INSPECTION Remotely inspect equipment before purchasing with our interactive website at www instraview com LOOKING FOR MORE INFORMATION Visit us on the web at www artisantg com for more information on ...

Страница 2: ...Rosemount Analytical MODEL 880A NON DISPERSIVE INFRARED ANALYZER INSTRUCTION MANUAL 748250 L Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 3: ...ng Manual Part Number 748250 L October 1999 Printed 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 SNOOP is a registered trademark of NUPRO Co Irtran is a trademark of Eastman Kodak Co Pyrex is a registered trademark of Corning Glass Works Artisan Technology Group Quality Instr...

Страница 4: ...UCTION 1 1 GENERAL DESCRIPTION 1 1 1 2 AVAILABLE OPTIONS 1 2 SECTION 2 UNPACKING AND INSTALLATION 2 1 UNPACKING 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 4 2 7 SAMPLE HANDLING SYSTEM 2 4 2 8 LEAK TEST PROCEDURE 2 5 2 9 SAM...

Страница 5: ... Keys 3 2 3 3 3 User Programmable Keys 3 4 3 3 4 Run Mode Display 3 5 3 3 5 General Display Information 3 5 3 4 ACCESSING MODE DISPLAYS 3 6 3 5 SECURITY CODE 3 6 3 6 RANGE PARAMETERS 3 8 3 6 1 Range Selection 3 8 3 6 2 Component of Interest 3 9 3 6 3 Gain 3 9 3 6 4 Range Fullscale 3 9 3 6 5 Calibration Gas 3 10 3 6 6 Zero Offset 3 10 3 6 7 Time Constant 3 10 3 7 ANALYZER DIAGNOSTICS 3 10 3 8 ZERO ...

Страница 6: ...IGITAL GAIN ADJUSTMENT 5 4 5 6 SOURCE BALANCE ADJUST 5 4 5 7 SOURCE ALIGNMENT 5 6 5 8 SOURCE CURRENT ADJUSTMENT 5 6 5 9 CASE HEATER TEMPERATURE CONTROL 5 6 5 10 ERL ERROR MESSAGE 5 7 SECTION 6 ROUTINE SERVICING 6 1 CELL REMOVAL CLEANING AND INSTALLATION 6 1 6 1 1 Long Cell Configurations 6 1 6 1 2 Short Cell Configurations 6 2 6 2 CELL DESICCANT 6 4 6 3 SOURCE REPLACEMENT 6 4 6 4 SOURCE BALANCE SH...

Страница 7: ... 8 6 Power Supply Board 6 10 6 8 7 Adapter Board 6 11 6 8 8 Micro Board 6 11 6 8 9 Case Heater Temperature Control Board 6 11 6 8 10 Dual Alarm Calibration Gas Control Board 6 11 6 8 11 Isolated Remote Input Output Board 6 12 6 8 12 Auto ZERO SPAN Board 6 12 6 8 13 Current Output Board 6 12 6 8 14 Auto Range Change 6 12 SECTION 7 REPLACEMENT PARTS 7 1 CIRCUIT BOARD REPLACEMENT 7 1 7 2 SELECTED REP...

Страница 8: ...un Mode Display 3 5 3 4 Logic Flow Chart 3 7 3 5 Security Mode 3 8 3 6 Range Mode 3 9 3 7 Diagnostic Mode 3 12 3 8 Linearizer Mode 3 13 3 9 Typical Application Linearization Curve Linearizer OFF 3 15 3 10 User Determined Linearization Curve Normalized 3 15 3 11 Alarm Mode 3 16 3 12 Status Display 3 17 3 13 Current Output Mode 3 18 3 14 Auto Zero Span 3 20 3 15 Remote Input Output 3 22 5 1 Function...

Страница 9: ...ssor Board 623995 Schematic Diagram Oscillator Board 624003 Schematic Diagram Case Heater Temperature Control Board 624085 Schematic Diagram Signal Board 624092 Schematic Diagram Isolated Voltage to Current Board 624127 Schematic Diagram Adapter Board 624190 Installation Drawing Model 880A 624204 Schematic Diagram Dual Alarm Fail Safe Alarm 624251 Schematic Diagram Isolated Remote Control Board 62...

Страница 10: ...zard 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 parts which can cause death or serious injury Refer servicing to qualified personnel For safety and proper...

Страница 11: ...ntegrity of the sample containment system is broken to ensure the system is in leak proof condition Leak check instructions are provided in Paragraph 2 8 Internal leaks resulting from failure to observe these precautions could result in an explosion causing death personal injury or property damage This instrument s internal pullout chassis is equipped with a safety stop latch located on the left s...

Страница 12: ...ACT WITH SAMPLE WINDOWS Sapphire quartz Irtran CELLS Gold plated Pyrex or stainless steel TUBING FEP Teflon FITTINGS 316 stainless steel O RINGS Viton A SAMPLE PRESSURE Max 10 psig 69 kPa standard Pressurized application available upon request ANALOG OUTPUT Standard 0 to 5 VDC Optional 0 to 20 mA 4 to 20 Ma LINEARIZATION Keypad entered coefficients for linearizing 1 2 or all 3 ranges ENCLOSURE Gen...

Страница 13: ...5 250 VAC or 5A 30 VDC resistive field programmable frequency and duration of closure 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 RANGE CHANGE ID Three remotely changeable ranges with positive identification Binary code field selectable RELAY OUT...

Страница 14: ... 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 M S D S or a written certification that the material has been decontaminated disinfected and or detoxified Return to Rosemount Analytical Inc 4125 East La Palma A...

Страница 15: ...ded for sampling only non flammable gases in non hazardous locations This product may carry approvals from a certifying agency or may be in compliance with EMC Directive If so the product will carry approval insignia like those shown here on the product name rating plate Rosemount Analytical Inc has satisfied all obligations from the European Legislation to harmonize the product requirements in Eu...

Страница 16: ...ncentration of the component of interest in the sample Readout is on the 16 character backlighted liquid crystal display in parts per million percent of composition or percent of fullscale Additionally a 0 to 5 VDC output for a potentiometric voltage recorder is provided as standard A linearizer based on a fourth order polynomial is incorporated in the electronic circuitry By turning the linearize...

Страница 17: ... AND ID A remote range change and ID is available CASE HEATER A proportional temperature controller with fan assembly maintains proper operating temperature inside the case PURGE KITS An air purge kit when installed with user supplied components meets Type Z requirements of standard ANSI NFPA 496 1989 for installation in Class I Division 2 locations as defined in the National Electrical Code ANSI ...

Страница 18: ...trical Code ANSI NFPA 70 This kit is designed to provide Type Z protection in accordance with Standard ANSI NFPA 496 1989 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 1989 Chapter 8 2 3 VOLTAGE REQUIREMENTS For safety and proper performance this instrument must be connected ...

Страница 19: ...able top or is installed in a protected rack panel or cabinet power may be connected via a 3 wire flexible power cord minimum 18 AWG max O D 0 480 min O D 0 270 through hole labeled POWER utilizing connector gland P N 899330 provided 115 115 Q3 C18 R39 655135 POWER SUPPLY BD R9 C13 TP1 TP2 CR5 C20 C19 Q2 Q4 C21 AR5 AR4 U2 R7 R6 R5 R4 R8 R10 R3 R36 R35 R34 R37 R20 R18 J 10 R19 R15 R16 R17 R 38 J14 ...

Страница 20: ...he cable gland and connect the leads to TB1 After connecting the leads tighten the cable gland adequately to prevent rotation or slippage of the power cable Since the rear terminals do not slide out with the chassis no excess power cable slack is necessary FIGURE 2 3 CABLE GLAND CONNECTIONS S3 Set switch window for voltage required SENSOR J18 POWER SUPPLY J11 POWER LINE J5 400A 880 951E AR1 J19 TE...

Страница 21: ...ctions are 1 4 inch ferrule type compression fittings 2 6 CALIBRATION GAS REQUIREMENTS Analyzer calibration consists of setting a zero point and one upscale point per range All applications require a zero standard gas to set the zero point on the display or recorder chart If the factory Calibration and Data Sheet included with the drawings at the end of the manual specifies a background gas use th...

Страница 22: ... use a Halogen or helium leak detection device This analyzer is of a type 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 this analyzer the sample containment system must be carefully leak ...

Страница 23: ...ressure on readout is eliminated if the same flow rate is 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 sampl...

Страница 24: ...ure 2 4 Each option will require a cable user provided which connects to a female plug The female plug in original packaging is attached to the appropriate terminal block on the option board If the instrument came equipped with one option the interconnect cable will be in place for all options The Alarm Auto Zero Span Calibration Gas Control and Remote Range Change Boards have jumper selectable ad...

Страница 25: ... to Figures 2 3 2 6 and Drawing 655147 Connect cable customer supplied to the 2 pin connector J2 The voltage to current board has a fixed address at the top of the board Run the cable through the cable gland and tighten once the connector has been secured 2 10 3 CALIBRATION GAS CONTROL CONNECTIONS Refer to Figures 2 3 2 5 and Drawing 655147 Connect cable customer supplied to the 6 pin connector J2...

Страница 26: ...the selected range 2 10 5 REMOTE INPUT OUTPUT CONNECTIONS Refer to Figures 2 3 2 8 and Drawing 655147 Connect cable customer supplied to the 9 pin connectors J2 and J3 The signal output is at J2 which consists of eight form A contacts rated resistive load 10 watts maximum switching power 200 VDC maximum switching voltage and 0 5 A maximum switching current The signal input is at J3 which consists ...

Страница 27: ... E B C Q1 E B C J3 K4 FT4 K6 CR5 R8 Q5 E B C Q1 E B C R10 C3 R1 R1 R2 R3 CR4 R7 Q4 E B C C2 C1 Interconnect Cable Jumper Selectable Address Outlet Cable 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 K8 U7 U1 1 U2 1 U3 1 1 C2 U4 U5 U6 1 1 1 624254 654416 ISO LATED REM O TE CO NTROL BD R6 R5 R4 R3 R10 R9 R8 R7 X Interconnect Cable Outlet Cable Jump...

Страница 28: ...4 must also be ordered If the analyzer was originally ordered with any of the above options the Accessory Kit is already installed and need not be ordered again for additional options This kit consists of a card cage which mounts in the rear of the case and three interconnect cables for internal wiring as shown in drawing 655147 2 12 MOTOR SOURCE REFERENCE CELL PURGE KITS Model 880A configurations...

Страница 29: ...NG AND INSTALLATION 2 12 October 1999 Rosemount Analytical 748250 L Model 880A Non Dispersive Infrared Analyzer NOTES Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 30: ...eak 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 CR5 is ON Refer to Figure 2 1 and Drawing 655137 FIGURE 3 1 MODEL 880A ADJUSTMENTS Power Supply Board Option Boards Gain Adjust R3 Display Contrast Adjust R8 Signal Board Source Current Test...

Страница 31: ...r To activate the manual span calibration of the analyzer To display the configuration and the status of alarms and error messages Used in conjunction with left and right or up and down arrows F1 F2 and ENTER keys Pressing the SHIFT key in any display except Run Mode Zero Setting Span Setting and Status causes a to be displayed at the far right hand position Pressing will then move the cursor 16 c...

Страница 32: ...ayed SHIFT causes the lowest value to be displayed Depress the arrow key once to change one digit depress and hold either key to scroll continuous value change thereby reducing the time required to make large value changes To move cursor one position at a time or when used in conjunction with the SHIFT key moves the cursor 16 characters one full display at a time To access a function to store a va...

Страница 33: ... until the desired display is obtained 2 Press F1 F2 SHIFT F1 or SHIFT F2 to program the analyzer to return to this display from the RUN mode This will assign F1 F2 SHIFT F1 or SHIFT F2 to this particular display and will retain those assignments until the key or combination of keys is reprogrammed using the same procedure described in this section The analyzer acknowledges this command by flashin...

Страница 34: ...IGURE 3 3 RUN MODE DISPLAY 3 3 5 GENERAL DISPLAY INFORMATION The following features are present to the right of all display sequences except Run Mode display Zero Span screens Status screen and Auto Zero Span screens The beginning of a sub menu is indicated by in the extreme right position of the display This arrow indicates that there will be more information in subsequent displays which can be o...

Страница 35: ...ODE See Figure 3 5 The Model 880A 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 password may be changed to any three character gr...

Страница 36: ... return analyzer to Run Mode Note If Security is activated display will return to Run Mode unless user enters Security Mode and enters password Will enter displayed mode function ENTER ENTER ENTER MODE REMOTE I O RUN MODE SECURITY RANGE DIAGNOSTICS LINEARIZER CURRENT OUT ALARM Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 37: ...cursor right left one character at a time and will go to next function and will return analyzer to RUN MODE and will change toggle settings SHIFT SHIFT ENTER SECURITY OFF ENTER DATA STORED SHIFT NEW PSWRD ENTER PSWRD IS NOW XXX SHIFT RUN MODE Select three characters Valid characters are space 0 through 9 and A through Z FIGURE 3 5 SECURITY MODE 3 6 RANGE PARAMETERS 3 6 1 RANGE SELECTION See Figure...

Страница 38: ...ame or designation may be selected for each range by placing the cursor under the desired digit NNN and selecting a letter or number with or key This name will appear on the display when the analyzer is in the run mode 3 6 3 GAIN In the GAIN X display an amplifier gain of 1 2 4 or 8 can be selected for each range with the or key depending on the sensitivity desired Refer to Section 5 5 Range 3 is ...

Страница 39: ... amount of time in seconds in which the analyzer responds to change A different TIME CONSTANT can be selected for each range To change or check the settings of the different range parameters follow the steps in the appropriate figure in this section Note After changing a setting press ENTER to retain the new setting in nonvolatile memory Settings stored in nonvolatile memory will be saved even in ...

Страница 40: ...To calibrate the zero setting for the analyzer for all three ranges press ZERO and then press ENTER 3 9 SPAN CALIBRATION The Model 880A Analyzer sets span for the selected range in a simple two keystroke procedure To span the analyzer the operator simply presses SPAN and ENTER When SPAN is pressed display notes SPAN WAIT and then X XX NN MMM where X XX is the run mode value NN is the percentage of...

Страница 41: ...IFT OSC T DET SIG X XX 5V X X SHIFT 5 15V XX X SHIFT SHIFT 15V XX X 5 5 12V XX X 2 Connect span gas to the sample cell inlet at the back of the analyzer Flow the gas at a rate of 500 to 1000 cc min 1 to 2 SCFH as read on a flowmeter until the display reading stabilizes 3 To calibrate press SPAN and then ENTER FIGURE 3 7 DIAGNOSTIC MODE 3 10 LINEARIZATION The Model 880A Analyzer can be operated in ...

Страница 42: ... Y is the linear output Linearization coefficients can be developed for each range and stored in the analyzer using the front panel keypad The operating range is selected by entering RANGE 1 2 or 3 in the Range Mode Coefficients for the selected range are automatically used independent of the position of Range n from the Linearization Mode except for the ALL Range selection FIGURE 3 8 LINEARIZER M...

Страница 43: ...is must be reversed as illustrated in Figures 3 9 and 3 10 A multiple linear regression is then used to calculate coefficients For example If the range is 0 to 5000 ppm and readings are 0 to 100 then divide all of the concentrations by 5000 and the readings by 100 Put the normalized concentrations on the Y axis and the normalized readings on the X axis These data points can be entered into any pro...

Страница 44: ...URE 3 10 USER DETERMINED LINEARIZATION CURVE NORMALIZED 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 0 100 50 CONCENTRATION ppm READING FULLSCALE Display ppm 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 1 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 READINGS NORMALIZED Axis Reversed CONCENTRATION NORMALIZED Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 45: ... setpoints are programmable for one range selected and are dimensionless The alarms can be set with one alarm HIGH and one alarm LOW both alarms HIGH or both alarms LOW This option is completely user configurable See Figure 3 11 The Status Display see Section 3 11 1 will reflect an alarm condition should one occur When the instrument is in alarm condition exceeding the alarm setpoint the latch ass...

Страница 46: ...fe not only sets the alarm when an alarm condition is present but also in the event of a power outage 3 11 1 STATUS DISPLAY Refer to Figure 3 12 The STATUS display shows the alarms error messages and security lockout status See explanations of error messages in Section 5 1 The STATUS display can be used to check the following alarm setpoints without entering one of the MODE functions HIGH LOW AUTO...

Страница 47: ...off NO the analyzer defaults to the 0 to 100 range FIGURE 3 13 CURRENT OUTPUT MODE 3 13 ZERO SPAN CALIBRATION WITH CALIBRATION GAS CONTROL The Calibration Gas Control 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 a...

Страница 48: ...ents and also drift limits for zero and span if activated The auto zero span AUTO CAL ON display allows the user to select ON or OFF to turn the Auto Zero Span on or off Toggling from OFF to ON resets the timers for the Auto Zero Span To reset the timers when the Auto Zero Span is on toggle from ON to OFF to ON The sample and hold SH YES display allows the user to select YES or NO to turn the auto...

Страница 49: ...o 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 feature Toggling from O...

Страница 50: ...e I O the Auto Cal function must be disabled by toggling AUTO CAL to OFF in the AUTO CAL OFF display The repeat span RPT SPAN nnn HR display allows the user to select the amount of time between span calibrations This is the amount of time after the initial span calibration before this calibration is repeated The DRIFT LIMIT ON display allows the user to determine the maximum amount of span and zer...

Страница 51: ...GE INPUT OUTPUT Refer to Figure 3 15 The Model 880A Analyzer has optional remote range change and ID 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 1 and 3 2 for explanations of BIN binary and DEC decimal When SPECIAL is selected only autocal status and remote local ...

Страница 52: ...ot Used 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 PIN 1 BIN R3 0 1 1 BIN R2 ...

Страница 53: ...ARTUP AND CALIBRATION 3 24 October 1999 Rosemount Analytical 748250 L Model 880A Non Dispersive Infrared Analyzer NOTES Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 54: ...ry 24 hours and that this practice be continued unless experience indicates that some other interval is more appropriate Readout accuracy is directly proportional to change in barometric 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 calibra...

Страница 55: ... radiation is absorbed by the component of interest in the sample with the quantity of infrared radiation absorbed being proportional to the component concentration The detector is a gas microphone based on the Luft principle It converts the difference in energy between sample and reference cells to a capacitance change This capacitance change proportional to component concentration is processed a...

Страница 56: ... 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 ER3 E3 SPAN 3 LMTS ER4 E4 ADC SATURATED Signal into ADC is greater than fullscale rating Refer to Figure 3 6 and reduce the digital GAIN setting by one value i e 8 to 4 4 to 2 or 2 to 1 If the GAIN is initially on 1 switch from High to Low gain ER5 E5 ZERO DRIFT Zero drift ...

Страница 57: ...PASS FILTER FULLWAVE RECTIFIED 5 Hz SIGNAL LOWPASS FILTER ZERO SUPPRESSION DIGITAL GAIN X 1 X 2 X 4 X 8 REF DIGITALLY CONTROLLED MUX ADC MICRO TIME CONSTANT SOFTWARE SPAN DAC DAC LIN SOFTWARE ZERO SPAN 1 2 3 DIGITALLY CONTROLLED ZERO AMPLIFIED UNFILTERED 5 HZ SIGNAL Note If several error conditions are active simultaneously only one error message will take precedence in the Run Mode display To vie...

Страница 58: ...V fullscale If this value is too low or is above 7 5V adjust the preamp gain 1 Refer to Section 3 7 and access the Detector Signal display 2 Flow SPAN calibration gas for the least sensitive range through the SAMPLE CELL until display reading stabilizes An example Range 1 500 ppm CO Range 2 2000 ppm CO Range 3 5000 ppm CO In this case the least sensitive range would be 5000 ppm If the calibration ...

Страница 59: ... than the original value The GAIN may be changed to 1 2 4 or 8 If the span potentiometer status PS was at the top of its range in Step 2 95 then the GAIN should be raised If the span potentiometer status PS was at the bottom of its range in Step 2 5 the GAIN should be lowered 5 Press SHIFT ENTER to return to the Run Mode 6 Repeat Step 1 If the analyzer still cannot be spanned repeat steps 2 throug...

Страница 60: ...ance in tank circuit shifts resonance curve to right decreasing carrier amplitude Detector Oscillator Tune Output Diaphragm at maximum Distention Stationary Metal Button A Functional Diagram Circuitry in Tune Mode OSC TUNE L1 10 MHz Oscillator Tank Circuit Voltage Doubler Rectifier Diaphragm Undistended DETECTOR Reference Chamber Sample Chamber value for Step 5 If this reading exceeds 1 2 V then a...

Страница 61: ...t both measurement and reference sources up or down to reach the minimum detector signal 5 Re tighten source housing screws 6 Do the Source Balance procedure in Section 5 6 5 8 SOURCE CURRENT ADJUSTMENT 1 Follow the steps in Figure 3 7 to access the Source Current display 2 Refer to Figure 3 1 Adjust the trim potentiometer R9 located on the Power Supply Board to view the desired current on the dig...

Страница 62: ... the user inputs for example 50 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 The user should cross reference the linearizer coefficients entered with those provided by the factory or those the user has calculated Re enter them...

Страница 63: ...ROUBLESHOOTING 5 8 October 1999 Rosemount Analytical 748250 L Model 880A Non Dispersive Infrared Analyzer NOTES Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 64: ...cal bench plate 5 Support the cells and gently move the motor source assembly away from the detector The cells and its o rings will now be free 6 Rinse the cell with acetone If this does not remove all foreign matter use a soft brush Do not use any metallic object inside the cell because it will scratch the gold plating Loss of gold plating may require cell replacement 7 After all matter has been ...

Страница 65: ...ews holding the end cap optical filter assembly and sample cell assembly to the detector Gently move the motor source assembly away from the detector The sample cell assembly end cap optical filter assembly and o rings will now be free 5 Rinse the cell with acetone If this does not remove all foreign matter use a soft brush Do not use any metallic object inside the cell 6 After all matter has been...

Страница 66: ...emoved for clarity Motor Source Assembly to Optical Bench Plate mounting screws Optical Bench Plate End Cap Filter Assembly Sample Cell to Detector mounting screws Motor Source Assembly to Optical Bench Plate mounting screws Optical Bench Plate Detector Assembly See Figure 6 3 seat properly Move the motor source assembly back into position Verify that the compression gaskets seat properly 11 Repla...

Страница 67: ...alue as the reference source Note Observe how the parts are disassembled so that the reverse procedure can be used for reassembly 1 Loosen the two screws on the front of the case and slide the front panel forward 2 Remove the two screws holding the source housing to the chopper housing 3 Remove the two screws holding the source to the source housing Note how the source is mounted There is a front ...

Страница 68: ...ove motor 6 5 2 SHORT CELL CONFIGURATIONS 1 Refer to Figure 6 1B Remove the two screws holding the motor source assembly with the plate assembly attached to the optical bench base plate Gently slide the motor source assembly away from the cells 2 Remove the two screws holding the plate assembly to the motor source assembly 3 Refer to Figure 6 2 Remove chopper cover 4 Remove chopper blade 5 Remove ...

Страница 69: ... be re synchronized for all three ranges as follows 5 Choose the first range by selecting a range using the range parameters in Figure 3 6 6 Follow the instructions in Section 3 9 for standard analyzer or Section 3 14 for analyzer with Auto ZERO SPAN option and access the X XX XX 100 display 7 Press SHIFT then Proceed with the SPAN calibration 6 7 DETECTOR REPLACEMENT 6 7 1 REMOVAL LONG CELL CONFI...

Страница 70: ...assembly attached detector heater detector plate and o rings between end cap optical filter assembly and plate assembly are free 5 Disconnect ribbon cables 6 Remove oscillator board Refer to Figure 6 3C 7 Remove the two screws holding the end cap filter assembly and cell to the detector assembly The cell end cap optical filter assembly and o rings are now free 8 Remove the two screws holding detec...

Страница 71: ... O Rings Sample Line End Cap Assembly A LONG CELLS C DETECTOR ASSEMBLY Detector Cover Compression Gaskets Cell Assembly O Rings Desiccant Holder Optical Bench Plate End Cap Optical Filters Assembly O Rings Sample Lines Oscillator Board 623998 Thermal Fuse 898733 Pad Pad Temperature Sensor 622917 Detector Base Detector Pad Detector B SHORT CELLS FIGURE 6 3 DETECTOR REPLACEMENT Artisan Technology Gr...

Страница 72: ...to the core thus increasing inductance and decreasing resonant fre quency The adjustment is set for maximum obtainable reading At this setting tank circuit resonant frequency is the same as oscillator frequency i e nominal 10 MHz See Resonance Curve Number 1 Figure 5 2B Detuning By counterclockwise rotation of the OSC TUNE adjustment the slug is partially withdrawn from the core thus de creasing i...

Страница 73: ...d then discharging it in series with the output voltage during the next half cycle 6 8 5 SIGNAL BOARD DWG 624085 The 5 Hz sinewave detector signal goes through an AC amplifier U1A and associated resistor The output signal goes through bandpass filter network U2 and U4 to remove harmonics and distortion The signal next goes through a precision signal rectifier U3 and Q1 and then through low pass fi...

Страница 74: ...n analog domain that allows the processing of analog signals directly with a 12 bit plus sign ADC In addition two independent DAC s each 12 bytes wide allow the presentation of analog voltages for peripheral functions immediately 6 8 9 CASE HEATER TEMPERATURE CONTROL BOARD DWG 624003 This is a proportional temperature controller which works on a variable time method Resistors R7 R8 R9 R10 R11 and ...

Страница 75: ...to ZERO SPAN board is a peripheral circuit function which communicates with the computer via an 8 bit bus With the appropriate software it satisfies the auto ZERO SPAN requirement The assembly provides six form C relay contact outputs four of which are suitable for medium power requirements the remaining two are relegated to alarm or indicator functions Snubbers are provided for the medium power r...

Страница 76: ...tical 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 If circumstances necessitate repla...

Страница 77: ...8 Signal Board 7 2 2 CASE HEATER TEMPERATURE CONTROL ASSEMBLY OPTION Reference Figure 7 2 624006 Temperature Control Board 622917 Temperature Sensor 624433 Thermal Fuse 622733 Fan 622732 Heater 7 2 3 OPTICAL BENCH Reference Figures 6 2 6 3 and 7 3 623998 Oscillator Board 898733 Detector Thermal Fuse 622917 Detector Temperature Sensor 620298 Detector Heater 652605 Chopper Motor 624442 Source Matche...

Страница 78: ...bly 622700 Transformer 622751 Power Supply Board 655135 Optical Bench See Figures 6 1 and 7 3 Note Long Cell shown Case Heater Temperature Control Option See Figure 7 2 LCD Display 657849 Signal Board 624088 Micro Board 623785 Sensor Case Heater Temperature Control Option See Figure 7 2 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 79: ... Analyzer FIGURE 7 2 CASE HEATER TEMPERATURE CONTROL ASSEMBLY Temperature Control Board 624006 Heater Assembly 622732 Fan Assembly 622733 Sensor 622917 See Figure 7 1 for mounting location Thermal Fuse 624433 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 80: ...ector Plate Detector Heater 620298 Detector Assembly See Figure 6 3 Motor Source Assembly See Figure 6 2 Compression Gaskets Plate Assembly O Rings Cell O Rings Desiccant Holder Optical Bench Plate End Cap Optical Filters Assembly Motor Source Assembly See Figure 6 2 O Rings Detector Plate Detector Heater 620298 Detector Assembly See Figure 6 3 LONG CELLS SHORT CELLS Artisan Technology Group Quali...

Страница 81: ...PLACEMENT PARTS 7 6 October 1999 Rosemount Analytical 748250 L Model 880A Non Dispersive Infrared Analyzer NOTES Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 82: ...g 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 125 F 52 C A flame should never be permitted t...

Страница 83: ... blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 84: ...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 LIABLE FOR DAMAGES CAUSED BY DELAY IN PERFORMANCE ...

Страница 85: ... blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 86: ...ou 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 material or used in such a hazardous environment the...

Страница 87: ... blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Страница 88: ...l service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE INSPECTION Remotely inspect equipment before purchasing with our interactive website at www instraview com LOOKING FOR MORE INFORMATION Visit us on the web at www artisantg com for more information on ...

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