Teledyne 450H 5.3 A/D - D/A Calibration Procedure, 2- ANALOG OUTPUT JUMPERS, Press SETUP-DIAG

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FIGURE 4.2- ANALOG OUTPUT JUMPERS

FIGURE 4.2- ANALOG OUTPUT JUMPERS

5.3 A/D - D/A Calibration Procedure

This procedure should be performed whenever a circuit board assembly is exchanged or whenever the analog output voltage range is changed.

To calibrate the ADC, do the following:

1.Press SETUP-DIAG.

2.Enter Diagnostic password and press NEXT until D/A CALIBRATION appears in the display and press ENTR.

3.Press ADC to perform the A/D Cal.

4.The M450H display will read "ADJUST ZERO:A/D=xx.x MV.” Put the probe of a voltmeter between TP3(AGND) and TP9(DAC #0) on the top of the V/F card.

5.The value displayed by the voltmeter should be close(+/- 20 mV) to the value on the M450H display. If they are not close then the V/F card has probably been configured improperly.

6.Adjust the Zero pot(R27) on the V/F card until the value on the M450H display matches the value on the voltmeter to within +/- 2 mV. Note that when adjusting R27, the value on the M450H display will change, the value on the voltmeter will remain constant.

7.Press ENTR.

8.The M450H display will now read "ADJUST GAIN:A/D=xx.x MV.”

9.Adjust the Span Pot (R31) on the V/F card until the value on the M450H display matches the value on the voltmeter to within +/- 2 mV.

10.Press ENTR.

11.The ADC is now calibrated and the M450H will automatically calibrate all the DAC's. This process takes only a few seconds.

12.Press EXIT 3 times to return to the sample menu.

P/N 02826B1 Teledyne API Model 450H O3 Monitor Instruction Manual - Page 42

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Contents MODEL 450H OZONE MONITOR EMAIL api-sales@teledyne.comPrinted 05/15/06 SAFETY MESSAGES 4.0 MAINTENANCE TABLE OF CONTENTS3.0 SETUP MODE 5.0 ADJUSTMENTSAPPENDIX A - ELECTRICAL SCHEMATIC INDEX 5.3 A/D - D/A CALIBRATION PROCEDURE…5.4 CURRENT LOOP CALIBRATION FIGURES TABLE 1.2 CONTROL INPUTS TABLESTABLE 1.1 DIGITAL OUTPUTS TABLE 1.3 FINAL TEST AND CALIBRATION VALUES1.0INTRODUCTION 1.1Preface02024c 1.2 WARRANTY POLICYADVANCED POLLUTION INSTRUMENTATION DIVISION COVERAGE1.3 Principle of Operation Page 1.4 Specifications 1.5 Installation 19” Rack Mount EnclosurePage 5.If the M450H has been configured with the auto-zerovalve option, connect the oxygen or other zero gas source to the ¼” tube fitting labeled ‘Zero Gas Inlet.’ Do not exceed 30 psig in the zero air delivery line 1.6 Installation NEMA 4X Wall Mount Enclosure ozone FIGURE 1.1 - NEMA 4X MOUNTING HOLE DIMENSIONS FIGURE 1.2 - NEMA 4X ELECTRICAL POWER CONNECTIONS FIGURE 1.3 - NEMA 4X PNEUMATIC CONNECTIONS 1.6.1Analog Output FIGURE 1.4 - ELECTRICAL SIGNAL I/O CONNECTIONS1.6Electrical I/O Connections 1.6.2 Relay OutputsOutput FIGURE 1.5 - CONNECTING DIGITAL OUTPUTS1.6.4 Control Inputs DescriptionCONTROL INPUTS 1.6.5 RS232 OutputInput Zero CalibrateU V L A M P M O T H E R B V / F C P U A C L I N E FIGURE 1.6 - NEMA4X ASSEMBLY LAYOUTFIGURE 1.7 - M450H PNEUMATIC BLOCK DIAGRAM D C P O W E R SOFigure 1.8 - 19” Rack Assembly Layout POWER SUPPLY MODULE1.7 Operation verification TABLE 1.3 FINAL TEST AND CALIBRATION VALUES 1.8.1 Auto-ZeroOption 1.8.5 Flow Switch1.8 Options 1.8.2 Isolated Current Output 4-20mAor 2-20mA2.1.4 E2 ROM backup of software configuration 2.1Key features2.1.2 Concentration Alarms 2.0OPERATIONFIGURE 2.1 - MODEL 450H FRONT PANEL 2.2 Front Panel Display2.2.1 Front panel display fields Mode FieldTEST MEASUREMENTS Message/Test Measurement FieldTest Message Warning Message2.3.1 Main Menu 2.3 Software Operation2.2.2 Status LED’s StateClearing Alarms 2.3.3 Alarm Status MenuFIGURE 2.3 - ALARM STATUS MENU Audible BeeperPage 3.0 SETUP MODE FIGURE 3.1 - SETUP MENU3.3 Setting the time-of-dayand date CLK 3.1 Setting the Concentration Alarms ALRM3.2 Setting the Concentration Units UNIT HI ALARM OFF3.4 Setting the RS-232baud rate COMM 1 ALARM BEEPER 3.5 Setup variables VARS0 LATCH_ALARMS 3 AZERO ENABLE7 AZERO HOLD OFF 8 GAS MOLECULAR WEIGHT10 TPC ENABLE 9 CONCENTRATION RANGE3.5.2 D/A Calibration 3.5Diagnostics DIAG3.5.1Zero Calibration 3.5.3 Analog Output4.3 Cleaning the Optical Cell 4.0Maintenance4.2Cleaning Exterior Surfaces of the M450H Filter Replacement ProcedureFIGURE 4.1 MEASUREMENT CELL DISASSEMBLY 4.4 Degree of Protection5.1 Calibration 5.0 ADJUSTMENTSSwitch Settings 5.2Changing the analog output range5.3 A/D - D/A Calibration Procedure 1.Press SETUP-DIAGFIGURE 4.2- ANALOG OUTPUT JUMPERS 5.4 Current Loop Calibration zero point can be adjusted anywhere between 0 and 4 milliamps. Press ENTR when you have reached the desired zero point as measured by your test meter APPENDIX A - SOFTWARE MENU TREE Page APPENDIX B - SPARE PARTS LIST DESCRIPTIONPage APPENDIX C - ELECTRICAL SCHEMATIC INDEX Drawing NumberTitle