MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15 Thomson Technology
63
Engine oil pressure and engine temperature analog circuits are not factory
calibrated and therefore require field calibration before the equipment is placed
into service. Refer to Section 9.6.8 & 9.6.9
for detailed information on field
calibration procedures required.
WARNING!!!
Failure to field calibrate and validate the correct operation of the
engine oil pressure and engine temperature analog circuits on the
equipment may result in severe equipment failure or damage.
9.6.2. VOLTAGE SENSING CALIBRATION (PHASE TO PHASE OR
PHASE TO NEUTRAL)
VOLTS AB
ZERO
99
600V
Displays the generator phase voltages to be calibrated.
Displays the type of calibration function, either ZERO or SPAN.
Displays the calibration correction factor number (0-255) used to obtain
the correct voltage reading. Note: To correctly calibrate any of the
voltage sensors, the ZERO function must be calibrated before the
SPAN function.
Displays the actual voltage measurement that will be the same value as
shown on the MEC 2 display menus for generator supply. This voltage
reading may be calibrated higher or lower by changing the correction
factor number.
9.6.3. VOLTAGE CALIBRATION PROCEDURE
NOTE:
To accurately calibrate the MEC 2 voltage sensors,
an external test voltage meter is required, with an
accuracy of 0.5% or better.
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