KEPCO KLP Series (older -1200 models) Operator Manual - Manual (Page 78)

4-6
KLP 073008
4.4.2 CURRENT CALIBRATION (VISA DEMO)
During current calibration, the current, current readback and analog current readback are cali-
brated.
1. Click the CURRENT button on the Calibration window to start Current calibration; the status
display (on the main panel) reads LOAD. When the shunt and DVM are connected per PAR.
4.4, step 4, click the CURRENT button to start current calibration. The status display reads
CMAX.
2. Monitor DVM and click the “+” button to increase and the “–“ to decrease the output current
until the DVM reads as close as possible to maximum rated current (Calculate current as fol-
lows
:
I (Amperes) = DVM reading (Volts) / Shunt Resistance (Ohms).
3. Click the PRESS TO ACCEPT button to accept the value. The status display reads C_0 .
Click the “+” button to increase and the “–“ to decrease the output current until the DVM
reads as close as possible to minimum rated current (Calculate current as follows:
I (Amperes) = DVM reading (Volts) / Shunt Resistance (Ohms).
4. Click the PRESS TO ACCEPT button to accept the value. The status display reads CMAX.
Click the “+” button to increase and the “–“ to decrease the output current until the DVM
reads as close as possible to maximum rated current (Calculate current as follows:
I (Amperes) = DVM reading (Volts) / Shunt Resistance (Ohms).
5. Click the PRESS TO ACCEPT button to accept the value. The status display reads OUTC.
Connect to DVM (+) to Analog I/O Port J2, pin 7 and DVM (–) to pin 13. Click the “+” button
to increase and the “–“ to decrease the output current until the DVM reads as close as pos-
sible to 10V.
6. Click the PRESS TO ACCEPT button to accept the value. The status display will not change.
Click the ANALOG REF button on the calibration window to proceed to external calibration
(see PAR. 4.4.3).
4.4.3 ANALOG REFERENCE CALIBRATION (VISA DEMO)
During analog reference calibration the external analog reference voltages used to establish full
scale output current and voltage are defined. The factory default calibration of 10V programs full
scale output, however the following procedure allows any d-c value up to 10V to program full
scale, while a voltage proportionately less programs a corresponding decrease in the output.
NOTE: The full scale programming voltage has a 1:1 correspondence with the external read-
back; i.e., 10V full scale programming voltage results in a 10V full scale readback. If
the full scale programming voltage is changed to a value other than 10V, the full scale
readback voltage is changed accordingly.
1. Click the ANALOG REF button on the Calibration window; the status display (on the main
panel) reads INPV. Refer to PAR 3.7 to connect the reference voltage used as the source to
define full scale output voltage.
2. When the reference voltage is at the desired value, click the PRESS TO ACCEPT button to
accept the value. When the calibration is saved, this analog voltage will be equivalent to full
scale output voltage. NOTE: The full scale output voltage is determined by the virtual
settings in effect.