MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15 Thomson Technology
65
WARNING!!!
Voltage sensing circuits are capable of lethal voltages while
energized. Standard safety procedures should be followed
and be performed by qualified personnel only. Failure to do
so may cause personnel injury and/or death.
Use the INCREMENT or DECREMENT pushbuttons to adjust the
correction factor number while observing the displayed voltage level on
the MEC 2. Adjust the correction factor number to obtain an identical
voltage reading as measured with the external AC voltmeter.
With the correct voltage displayed, press the ENTER pushbutton to
accept the correction factor number. Record the correction factor number
on the MEC 2 programming sheet for future reference if required.
Repeat the above procedures for all remaining phases of the generator
supply as required.
NOTE:
Once the span calibration setting has been
completed, re-confirm the zero calibration points. If
the zero calibration setpoint needs further
adjustment, the span calibration point must also be
re-calibrated.
9.6.4. CURRENT SENSING CALIBRATION
CURRENT A
ZERO
99
350A
Displays the generator load current (phase A, B or C) 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 current reading. Note: To correctly calibrate any of the
current sensors, the ZERO function must be calibrated before the
SPAN function.
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