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TELEDYNE API
M703E Calibrator Operator’s Manual M703E Calibration and Verification
8.3. M703E GAS PRESSURE SENSOR CALIBRATION
The M703E Calibrator has two sensors that monitor the pressure of the gases flowing through the instrument.
The data collected by these sensors is used to compensate the final concentration calculations for changes in
atmospheric pressure and is stored in the CPU’s memory as test functions:
Table 8-1: M703E Pressure Sensors
SENSOR
ASSOCIATED
TEST FUNCTION
UNITS
PRESSURE MONITOR
MEASUREMENT POINT
Regulator Pressure Sensor
REG PRESSURE PSIG
Capped fitting on backside of regulator
assembly. See Figure 8-4
Photometer Sample Gas
Pressure Sensor
PHOTO SPRESS IN-HG-A
Use monitor to measure ambient
atmospheric pressure at the calibrator’s
location.
8.3.1.1. Gas Pressure Sensor Calibration Set Up
The procedures described in this section require an independent, calibrated pressure meter/monitor be attached
at the following location.
PHOTOMETER
PRESSURE SENSOR
O
3
GEN / PHOTOMETER
PRESSURE / FLOW SENSOR PCA
O
3
GAS INPUT
PRESSURE SENSOR
O
3
FLOW
SENSOR
O
3
Generator Assembly
O
3
GENERATOR
Flow Control
(100 cm
3
)
REF/MEAS
Valve
On Back Panel
M703E Chassis
GAS OUTPUT MANIFOLD
PHOTOMETER
OUTLET
TO ANALYZER
VENT
TO ANALYZER
DRY AIR
IN
ZERO AIR
IN
PHOTOMETER
INLET
EXHAUST
PHOTOMETER
ZERO OUT
PHOTOMETER
ZERO IN
PHOTOMETER BENCH
PUMP
Flow Control
(800 cm
3
)
INTERNAL
VENT
Flow Control
(5.0 lpm)
Pressure
Regulator
CHARCOAL
SCRUBBER
Filter
PUMP
Flow Control
(1.0 LPM)
Pressure
Monitor
Figure 8-3: Pressure Calibration Monitor Points
05744 Rev B 125