PowerTek PA2553, User Manual, Page: 69 / 88

Calibration 69
Note:
ESD and EMI noise can prevent registering zero values for open circuit
calibration.
3. Press ACCEPT.
4. Wait one minute until the readings settle. The values for Vn, Va, Vb, Vc and Aa,
Ab, Ac should zero out.
Figure 96. Open Circuit Point Zero Readings
5. Press ACCEPT again and wait until the readings are within
±
0.1.
6. Press NEXT when this step is complete.
If you choose not to perform the next cal point, press SKIP instead of NEXT.
Note:
If you skip any of the three cal points, the calibration date in the Setup Index
screen will not be updated.
Voltage Calibration
Depending on voltage option, the voltage cal point prompt will display—
INPUT = 400VDC SOURCE L & N TO CHASSIS
INPUT = 200VDC SOURCE L & N TO CHASSIS
INPUT = 120VDC SOURCE L & N TO CHASSIS
Figure 97. Voltage Point initial display
WARNING:
SHOCK HAZARD. LETHAL VOLTAGES OR CURRENT MAY BE PRESENT.
ENSURE NO VOLTAGE OR CURRENT EXISTS ON THESE CONNECTIONS PRIOR TO
ATTEMPTING TO CONNECT TO THESE INPUT TERMINALS.