Procedure for Item Number:
AMP-25, AMP-25-EUR Calibration Procedure
4588254, 4588268
Rev. 002 Page 2 of 7
Periodic calibration is required to conduct correct measurement. This instrument needs
periodic calibration at intervals of one year. Calibrate the instrument according to the following
procedures.
Cautions
Read instruction manual and understand the use of the instrument and its accessory(ies)
correctly before proceeding the calibration activities.
Calibrate the instrument at 23
o
C
2
o
C and humidity of 80% R.H. or less. Allow the
instrument to sit at this environment condition for > 30 minutes before calibration.
Erroneous calibrating operation may lead to the incorrect performance and
measurement.
WARNINGS!
Only trained personnel can do adjustments and repairing of the instrument!
Be aware of all safety precautions to avoid electric shock when working on opened
instrument!
Recommended equipment:
Fluke 5520 calibrator
Transconductance Amplifier
Current coil with overall diameter < 22 mm
1.
Enter Calibration Mode
1.1. Press and hold the "HOLD" button while powering up. The display shows full screen
display symbols, then release buttons and press buttons immediately according to the
following sequence to enter the
calibration procedure mode.
LPF I inrush
→ I
ZERO
→
HOLD
→
LPF I lnrush
→
The "HOLD" symbol on display will flash when in calibration mode.
1.2. Press
LPF I inrush button, the display shows “A1”, press LPF I inrush button again
to select “
25
”
2. Calibrate the position error (when in calibration mode)
2.1. Press button to select AC A mode
2.2. Clamp the jaw around the current coil. Ensure the jaw is completely close.
2.3. Apply the reference current AC 100 A / 50 Hz, and position the jaw as below, then
record the reading on the display.
Current coil
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