Ferroresonant L-828/L-829 CCR Operation
2009 ADB Airfield Solutions, Incorporated
96A0288T 4-10
All rights reserved Issued 9/04
Proceed as follows to calibrate the DPM
1. Depress and hold the top SCROLL button and the bottom
ENTER button simultaneously for 3 seconds (See Function Buttons
on page 5) to enter the calibration menu.
Figure 4-11 Calibration Menu
The SCROLL buttons are used to select items on the calibration
menu. Scroll to the desired selection and then press the ENTER
button. See the following steps to calibrate the DPM.
2. Current Calibration
During calibration you will be asked to wait until displayed “cnt”
values settle. These “cnt” values are internal A/D values as
measured by the power meter’s microprocessor. These values will
always vary slightly while the meter is measuring voltage and
current. They are displayed to give feedback that the load has
settled and the meter is obtaining a steady reading.
TIP: At each calibration step, wait until the thousands digit
has settled before proceeding.
A. Irms – High Step (6.6 amps)
Using the SCROLL buttons, select Irms and follow the prompts to
calibrate the Irms.
• Short the CCR output and then turn the CCR to the
highest step.
• Measure the CCR output current with a True RMS
current meter and adjust the current value on the meter
display to match.
NOTE: If the CCR output needs to be adjusted
follow procedure in the CCR manual.
• Wait until the Icnt and Vcnt values settle and select the
ENTER button
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