AC15QTP And AC20QTP Operations Manual....
52
9
CALIBRATION
In an uncalibrated state the input and output voltage and input current metering system should be
within 3%. The uncalibrated output current meter is normally 5% low. For calibration an
external reference voltmeter will be required along with a calibrated current transformer or
probe. If the system is to be calibrated on board using the yacht’s loads, attempt to shut down all
transient (fluctuating) loads if possible. Cyclic loads will complicate the current meter
calibration process.
This procedure must also be followed after replacing the battery on a maintenance basis
1)
Turn the system off and secure input power. Remove the front cover.
2)
Remove the lower front protective panel from the system, and set it aside. The input and
output power terminal blocks will be located at the bottom of the power panel located in
the lower compartment. Refer to the installation section of the Operations Manual for
additional information. Re-apply power to the system and bring the system on-line.
Transfer the yacht’s load
(or external test load bank)
to the converter.
3)
Shore Power Calibration
- Press the SHORE POWER
(2)
button under the LCD
(1)
display. Use an external reference meter and current transformer or clamp to measure the
input
(shore power
) power at the input terminal block. Shore Power voltages are
measured phase-to-phase. To enter the meter calibration screen, press and hold the
SHORE POWER
(2)
button down for 7 seconds, or until the calibration display appears,
then release the button. Use the SHORE POWER
(2)
button to move the cursor to the
parameter to be calibrated, voltage or current. Change the selected parameter by pressing
the F1
(13)
button to increment and the F2
(13)
button to decrement the displayed value.
When all displayed values equal the values measured by the reference meter, pressing the
SYSTEM STATUS
(5)
will store the new calibration values and return the display to the
System Status display. Press the SHORE POWER
(2)
button to verify proper shore
power meter calibration.
