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© 2022 All rights reserved. Data subject to change without notice.
LPT-M - Operation Manual
Rev. B | 2022.03
Step 2
Apply the correct Null gas for the type of sensor installed, for a minimum of 2
minutes.
Step 3
Attach a volt meter to TP1 and TP2. Using the POT RN1 potentiometer (located
on the left underside of the ESH-A board), adjust the voltage to read 0.40
VDC. Verify that the voltage output from digital multi-meter leads attached to
test points TP1 and TP2 on the LPT-M is reading 0.0 VDC (a Zero and Span
Calibration of the LPT-M will be required if this is not the case).
Step 4
Return the jumpers to their original positions and close the ESH-A.
Step 5
On the LPT-M, in the Sensor Configuration Menu (passcode 3032), press either
ARROW key to scroll through the menu and select the channel the ESH-A has
been assigned to.
Follow the instructions in Section 8.2 Calibrating the Internal
Sensor(s)
with the exception of applying the gas to the ESH-A sensor opening
instead of the LPT-M
sensor opening.
7.5 Calibrating an Oxygen Sensor
When calibrating an Oxygen sensor, the process is reversed. A Span Calibration
must be done first, then a Zero Calibration. The Zero Calibration is done using a
cylinder of 99.9% Nitrogen (N
2
) gas.
Step 1
In the Sensor Configuration Menu (passcode 3032), press either ARROW key
to scroll through the menu and select the channel with the Oxygen sensor you
want to calibrate. Press ENTER and use the ARROW key to scroll to Calibrate
Span.
