TP-6694 7/18 53Section 2 Operation
2.7.4 Generator Metering (and
Calibration)
Displays generator output data including line-to-line and
line-to-neutral voltages, current, frequency, total
kilowatts, and total kVA. The menu displays
three-phase voltage and current readings when
applicable.
All menu displays apply to both single-phase or three-
phase voltages on the menu overview. The phase
designation does not appear in the controller menu
displays. Some displays will show 0 values when
single-phase connections are shown.
Note: For Decision-Makerr 3000 controllers with
firmware versions before 3.0.25, see Section
2.7.8 for generator calibration.
Display also provides access to the calibration factors
for metering (volts and amps). Changing the system
voltage or replacing the main logic control circuit board
requires calibration adjustment. Connect a meter with a
minimum accuracy of 1% to the generator set output
leads to calibrate the voltage-sensing logic.
To enable calibration
, start the generator set and select
the Volts L1-L2 display. Then push and hold the
pushbutton/rotary selector dial until the Calibration
Enabled popup appears. Calibration of each display is
now available. The display will show the following
values for three-phase generator sets. Single-phase
generator sets will only display items marked (*).
D Volts L1-L2 *
D Volts L2-L3
D Volts L3-L1
D Volts L1-N *
D Volts L2-N *
D Volts L3-N
D Current L1 *
D Current L2 *
D Current L3
The user can change individual values or can select
Reset Calib?--Yes to reset all voltage and current
values. The Reset Calib? display will only show if
calibration is enabled.
When calibrating voltage, the metered value and the
number being entered as the calibrated value must be
within 10% of the system operating voltage.
When calibrating current, the metered value must be at
least 25% of the rated current on units smaller than
100 kW and at least 50 amps on units rated larger than
100 kW. The number being entered as the calibrated
value must within 10% of the metered value.
To disable calibration
, Rotate the pushbutton/rotary
selector dial until the <--Return popup appears.
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