MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15 Thomson Technology
68
9.6.6. BATTERY VOLTAGE CALIBRATION
BAT VOLTS SPAN
99
24.6V
Displays the type of calibration function (SPAN).
Displays the calibration correction factor number (0-255) used to
obtain the correct voltage reading.
Displays the actual battery voltage measurement that will be the same
value as shown on the MEC 2 display menu. This voltage reading
may be calibrated higher or lower by changing the correction factor
number.
9.6.7. BATTERY VOLTAGE CALIBRATION PROCEDURE
NOTE:
To accurately calibrate the MEC 2 battery voltage
sensor, an external test DC voltmeter is required,
with an accuracy of 0.5% or better.
To calibrate the battery voltage sensor, perform the following procedure:
9.6.7.1.SPAN CALIBRATION
Energize the battery supply voltage to the controller and connect the
external test DC voltmeter to the battery terminals, B+ and B-.
In the programming mode, scroll to the battery span calibration point.
Use the INCREMENT or DECREMENT pushbuttons to adjust the
correction factor number while observing the displayed battery voltage
level on the MEC 2. Adjust the correction factor number to obtain an
identical voltage reading as measured with the external DC 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.
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