MEC 20 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM047 Rev 13 05/03/30
78
Thomson Technology
WARNING!!!
Failure to field calibrate and validate the correct operation of the
pressure analog circuit on the equipment may result in severe
equipment failure or damage.
To calibrate the MEC 20 pressure sensor, perform the following procedure:
NOTE:
To accurately calibrate the MEC 20’s
pressure sensor, an external temporary
engine mounted pressure gauge is
required. The external pressure gauge
should be connected as close as possible
to the pressure sender for the MEC 20.
The calibration procedure is to be done only at a single point, which is the normal
operating pressure of the engine.
Connect a temporary engine mounted pressure gauge of suitable accuracy and
start the engine. Once the engine reaches normal operating pressure and
temperature, enter the programming mode and scroll to the “Engine Pressure
Offset” calibration point.
Use the INCREMENT or DECREMENT push-buttons to adjust the correction
factor number while observing the displayed pressure on the MEC 20. Adjust the
correction factor number to obtain the identical pressure reading as measured
with the external pressure gauge.
With the correct pressure displayed, press the “enter” push-button to accept the
correction factor number. Record the correction factor number on the MEC 20
programming sheet for future reference
