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User Manual – Rev J
6. Calibration
The Routine Calibration should be performed every 12 months. Non-routine Calibration is only
required if a related assembly is replaced or if the periodic calibration is unsuccessful.
Calibration of the CS Series can be performed from the front panel or over the bus. This section
covers calibration from the front panel.
Note: The output calibration is based on the current measurement function. In order to
calibrate the output current, the current measurements must be calibrated.
6.1
Recommended Calibration Equipment
Equipment
External Signal coupling transformer
AC Calibrator
Oscilloscope:
Computer (minimum requirement):
Digital Multimeter:
Current Shunt
Phase Meter
Distortion Meter
Resistive Load
Current Transformer, 0.1 volt/ amp
Frequency Counter
6.2
Calibration Password
The calibration screens for output or measurement calibration can be selected from the MENU
screen. (Press MENU button several times to toggle to select the CALIBRATION screen.)
To select the CALIBRATION screen press the ↑ or ↓ key several times to select PASSWORD.
Then press the ENTER key. This will bring up the PASSWORD screen. To prevent
unauthorized access to calibration data, a password must be entered to access any calibration
screen. The calibration password is a numeric value equal to 135 for the CS Series. Check the
LIMIT screen when in doubt.
The password can be entered using the Keypad to input the number. Once the correct value is
reached, press the ENTER key. Once set, the calibration screens remain accessible until the CS
unit is powered down. If you leave the calibration screen and return, toggle the value up or down
and back, followed by the ENTER key to re-engage the calibration mode.
Use the PHASE key on the front panel to select the phase to be calibrated.
California Instruments
Description
Signal Transformer DPC-56-20
Fluke 5200A or equivalent
General Purpose
Pentium, 1GHz, 256MB Ram, CD ROM
Agilent 34401A or equivalent / better (2x)
Isotek RUG-2-R100-0.1 (100 milliohm) calibrated
to 0.25% (single chassis CS)
Isotek RUG-2-R10-0.1 (10 milliohm) calibrated to
0.25% (multi-chassis CS)
Krohn-Hite Model 6620 or equivalent phase meter
(0.01° resolution, 0.02° accuracy).
Agilent 339A or equivalent
Three 18 ohm, 1.5-kilowatt power resistors.
Pearson model 110
Philips PM6670, PM6671, PM6672
CS Series
90
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