Teledyne 450H Azero Hold Off, Gas Molecular Weight, Concentration Range, Tpc Enable, Clock Adj

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This variable determines length of time that zero gas is admitted into the measurement cell before the zero calibration is performed. This value must be set to a long enough interval to ensure that the cell is purged of all ozone before the calibration is performed. The defaul value is 20 seconds.

7) AZERO_HOLD_OFF

This variable determines the length of time the instrument waits after the Auto-Zero cycle before normal measurement is resumed. The default value is 5 seconds.

8) GAS_MOLECULAR_WEIGHT

This variable is the molecular weight of the carrier gas that the ozone is being measured in. This value is used in the calculation of the wt% concentration unit. The default value is 32.0 (for Oxygen carrier gas.)

9) CONCENTRATION _RANGE

This variable sets the full-scale concentration range for the analog output. A 15 wt% concentration range means that 0-5 volts on the analog output will coorespond to a concentration range of 0-15 wt%.

10) TPC_ENABLE

This variable enables temperature and pressure compensation for the calculation of the ozone concentration. This variable should always be set to ON unless an external correction is being applied to compensate for temperature and pressure changes.

11)STD_TEMP

12)STD_PRESS

These variables are the standard temperature and pressure that are used to calculate the concentration when the units are set to grams per normal cubic meter (g/Nm3.)

13) RS232_MODE

This variable set the mode of operation of the RS232 interface. For more details on the use of the RS232 interface, please contact Teledyne API and request document number 01350.

14) CLOCK_ADJ

This variable is used to make slight adjustments to the instrument’s internal clock so that it keeps proper time. Setting this variable to a positive value will add that number of seconds each day to the clock while a negative value will subtract that number of seconds per day.

P/N 02826B1 Teledyne API Model 450H O3 Monitor Instruction Manual - Page 37

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Contents EMAIL api-sales@teledyne.com MODEL 450H OZONE MONITORPrinted 05/15/06 SAFETY MESSAGES 3.0 SETUP MODE TABLE OF CONTENTS4.0 MAINTENANCE 5.0 ADJUSTMENTS5.3 A/D - D/A CALIBRATION PROCEDURE… APPENDIX A - ELECTRICAL SCHEMATIC INDEX5.4 CURRENT LOOP CALIBRATION FIGURES TABLE 1.1 DIGITAL OUTPUTS TABLESTABLE 1.2 CONTROL INPUTS TABLE 1.3 FINAL TEST AND CALIBRATION VALUES1.1Preface 1.0INTRODUCTIONADVANCED POLLUTION INSTRUMENTATION DIVISION 1.2 WARRANTY POLICY02024c COVERAGE1.3 Principle of Operation Page 1.5 Installation 19” Rack Mount Enclosure 1.4 SpecificationsPage 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 1.6Electrical I/O Connections FIGURE 1.4 - ELECTRICAL SIGNAL I/O CONNECTIONS1.6.1Analog Output 1.6.2 Relay Outputs1.6.4 Control Inputs FIGURE 1.5 - CONNECTING DIGITAL OUTPUTSOutput DescriptionInput 1.6.5 RS232 OutputCONTROL INPUTS Zero CalibrateFIGURE 1.7 - M450H PNEUMATIC BLOCK DIAGRAM FIGURE 1.6 - NEMA4X ASSEMBLY LAYOUTU V L A M P M O T H E R B V / F C P U A C L I N E D C P O W E R SOPOWER SUPPLY MODULE Figure 1.8 - 19” Rack Assembly Layout1.7 Operation verification TABLE 1.3 FINAL TEST AND CALIBRATION VALUES 1.8 Options 1.8.5 Flow Switch1.8.1 Auto-ZeroOption 1.8.2 Isolated Current Output 4-20mAor 2-20mA2.1.2 Concentration Alarms 2.1Key features2.1.4 E2 ROM backup of software configuration 2.0OPERATION2.2.1 Front panel display fields 2.2 Front Panel DisplayFIGURE 2.1 - MODEL 450H FRONT PANEL Mode FieldTest Message Message/Test Measurement FieldTEST MEASUREMENTS Warning Message2.2.2 Status LED’s 2.3 Software Operation2.3.1 Main Menu StateFIGURE 2.3 - ALARM STATUS MENU 2.3.3 Alarm Status MenuClearing Alarms Audible BeeperPage FIGURE 3.1 - SETUP MENU 3.0 SETUP MODE3.2 Setting the Concentration Units UNIT 3.1 Setting the Concentration Alarms ALRM3.3 Setting the time-of-dayand date CLK HI ALARM OFF3.4 Setting the RS-232baud rate COMM 0 LATCH_ALARMS 3.5 Setup variables VARS1 ALARM BEEPER 3 AZERO ENABLE10 TPC ENABLE 8 GAS MOLECULAR WEIGHT7 AZERO HOLD OFF 9 CONCENTRATION RANGE3.5.1Zero Calibration 3.5Diagnostics DIAG3.5.2 D/A Calibration 3.5.3 Analog Output4.2Cleaning Exterior Surfaces of the M450H 4.0Maintenance4.3 Cleaning the Optical Cell Filter Replacement Procedure4.4 Degree of Protection FIGURE 4.1 MEASUREMENT CELL DISASSEMBLYSwitch Settings 5.0 ADJUSTMENTS5.1 Calibration 5.2Changing the analog output range1.Press SETUP-DIAG 5.3 A/D - D/A Calibration ProcedureFIGURE 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 DESCRIPTION APPENDIX B - SPARE PARTS LISTPage Drawing Number APPENDIX C - ELECTRICAL SCHEMATIC INDEXTitle