KEPCO BIT 4886 Operator Manual - Manual (Page 34)

3-12
BIT 4886 120413
12.At the calibration panel (Figure 3-4) click CURR to begin current calibration of the unit. Con-
nect CALIBRATION RESISTOR! window opens.
13.Connect load (see Table 3-3) across the output of the unit and connect DVM across the load
as shown in Figure 3-2. Voltage measurements must be converted to Amperes using Ohm’s
law, E = IR. Click OK button to close Connect CALIBRATION RESISTOR window.
14.The test window reads
LCurr ZERO
and the message Adjust for ZERO R83 (Io Zero) on
BOP A1 card. will be displayed.
15.Adjust the R83 Potentiometer on A1 board of BOP, until the external DVM reads voltage
specified in Table 3-2, then click OK button.
16.The text window reads
LCurr MAX
and the message Measure and Adjust. is displayed.
Using the " and # and ! and " buttons (see PAR. 3.3.2.1), adjust output until DVM
reads voltage specified in Table 3-2 for Low Current Accuracy, then click OK button.
17.The text window reads
LCurr MIN
and the message Measure and Adjust. is displayed.
Using the " and # and ! and " buttons (see PAR. 3.3.2.1), adjust until DVM reads volt-
age specified in Table 3-2 for Low Current Accuracy, then click OK button. NOTE: If the
<<<— or —>>> button is depressed, return to step 16 after clicking OK.
18.The text window reads
Curr ZERO
and the message Measure and Adjust. is displayed.
Using the " and # and
!
and
"
buttons (see PAR. 3.3.2.1), adjust the output until the
DVM reads the voltage specified in Table 3-2 for Main Current Zero, then click OK button.
19.The text window reads
Curr MAX
and the message Measure and Adjust. is displayed.
Using the " and # and
!
and
"
buttons (see PAR. 3.3.2.1), adjust output until DVM
reads the voltage specified in Table 3-2 for High Current Accuracy, then click OK button.
20.The text window reads
Curr MIN
and the message Measure and Adjust. is displayed.
Using the " and # and ! and " buttons (see PAR. 3.3.2.1), adjust until DVM reading is
as specified in Table 3-2 for High Current Accuracy. NOTE: If the <<<— or —>>> button is
depressed, return to step 19 after clicking OK.
21.The text window reads
Curr PROTECT
and the message Measure and Adjust. is dis-
played. Using the " and # and ! and " buttons (see PAR. 3.3.2.1), adjust until DVM
reading is as specified in Table 3-2. Click OK when done.
22.Current calibration is complete. If desired, the current calibration can be repeated by clicking
Curr at the calibration panel (Figure 3-4).
23.To exit Calibration, click on the Calibration On button on the main panel (Figure 3-3). This
will open a panel that allows the calibration to be saved. Click SAVE to save the calibration
constants (both voltage and current), or CANCEL to return to the old calibration.