Airport 828HC, Instruction Manual

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© Airport Lighting Company
□ If the calculated voltage is not within 5% of the CCR-displayed output voltage, you may
want to consider recalibration.
To Verify Input Voltage
□ Put the CCR into Local mode and turn the output power off.
□ Open the CCR door and pull the door switch plunger toward you laterally to bypass the
safety interlock.
□ Turn the CCR on to any brightness step.
□ Using voltage probes on a known, calibrated DMM, measure the input voltage. It may
be measured at the contactor, at the power-side fuse block, or on the control
transformer. Log the measured numbers.
□ Put the CCR on the highest brightness step. Log the measured numbers.
□ If the numbers are consistently more than 5% different, you may want to consider
recalibration.
7.3.2 Calibrating Output Current
Before continuing, refer to Section 7.3.1 How to Determine if Recalibration is Needed . If it is
determined that recalibration is required, complete the following steps fully to ensure the most
accurate results. Read all steps before beginning. Contact Airport Lighting Company for additional
information as needed.
Note: a resistor load bank, such as can be provided by Airport Lighting Company, is recommended
to provide a purely-resistive load to the CCR during calibration. Ideally, the CCR should be loaded
at 100% of its kW rating for the most accurate calibration.
□ Before doing a full recalibration, complete a “Calibrate Zeros” of the CCR. Refer to Section
5.1.2 Calibrate Zeros . Once the Calibrate Zeros is done, check to see if the reading
discrepancy still exists. If it does, continue.
□ Connect a known, calibrated current clamp to a known, calibrated digital multimeter
(DMM) and place the clamp on the output circuit wire.
□ Connect a load bank to the CCR.
□ Put the CCR into Local mode.
□ Navigate to the following menu, but do not enter the “Output Current” screen yet: