3-12
BIT 4886 051010
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
Í
and
Î
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
Í
and
Î
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
Í
and
Î
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
Í
and
Î
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
Í
and
Î
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
Í
and
Î
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.
