Voltage calibration
1. Connect an accurate true-RMS-responding voltmeter
to the voltmeter terminal. This voltmeter should have a
base accuracy of at least 0.1% with calibration trace-
able to the National Bureau of Standards.
2. Connect a stable 50/60 Hz voltage source (with less
than 5% harmonic content) to the External Source
terminals.
3. Set the POWER switch to External.
4. Adjust the voltage source to provide 120.0 Vac to the
control, as read on the reference voltmeter.
5. Before calibration can be performed, Security Level 3
must be activated by entering the proper security code
at FC 99, Security Code.
Function, 99, Enter; 32123 (default), Enter.
6. Access FC 47, Voltage Calibration.
Function, 47, Enter.
7. The display will show the voltage applied to the control.
This should correspond to the reading on the reference
voltmeter. If the control reading is significantly different,
the calibration can be altered by pressing Edit, keying
in the correct voltage as displayed on the reference
meter, and pressing Enter. The voltage circuit is now
calibrated.
Current calibration
1. Connect an accurate true-RMS-responding ammeter in
series with the current source.
2. Connect a stable 60/50 Hz current source (with less
than 5% harmonic content) to the reference ammeter
and to the current input terminals C
1
and C
3
on fanning
strip TB
2
(C
1
is identified by a red wire, and C
3
is iden-
tified as the green wire).
3. To power the control, connect a 120 Vac voltage source
to the EXTERNAL SOURCE terminals.
4. Place the power switch on External.
5. Adjust the current source to provide 0.200 A to the
control, as read on the reference ammeter.
6. Before calibration can be performed, Security Level 3
must be activated by entering the proper security code
at FC 99, Security Code.
Function, 99, Enter, 32123 (default), Enter
The proper level is now activated.
7. Access FC 48, Current Calibration.
Function, 48, Enter.
8. The display will show the current applied to the control.
This should correspond to the reading on the refer-
ence ammeter. If the control reading is significantly
different (greater than 0.6 mA error), the calibration can
be altered by pressing Edit, then entering the correct
current as displayed on the reference meter, followed
by Enter. The current circuit is now calibrated.
107
CL-6 SERIES CONTROL INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN225016EN January 2016
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