4-8
BOP-1K 091719
19.Send
CAL:ZERO
to prepare for current calibration. After sending the command, the BOP out-
put will be set to zero volts. Refer to Figure 4-2 to connect the C terminals of the Kelvin type
sense resistor to the BOP and connect the DVM to the P (probe) terminals of the sense
resistor ((LO terminal of DVM to common P terminal). Table 4-4 provides recommended
sense resistor values for various BOP current outputs, as well as the formula for calculating
expected measured values and tolerances for any sense resistor other than those recom-
mended. Table 4-2 lists Kepco and Manufacturer part numbers for those sense resistors rec-
ommended.
FIGURE 4-2. CALIBRATION SETUP FOR CURRENT MODE
The sense resistor will be dissipating full rated current of the BOP. If
it is hot to the touch, the sense resistor value, power rating and/or
cooling are incorrect; refer to PAR. 4.3 and Table 4-2.
20.Set the BOP to zero volts across the sense resistor (corresponding to zero current) by send-
ing
CAL:CURR ZERO
. Send
CAL:DATA
commands as needed (see PAR. 4.3a)
until the
reading is as close to zero as possible within the limits specified in Table 4-4 for CURRENT
ZERO.
21.Set the BOP to maximum positive output current by sending
CAL:CURR MAX
. Measure the
current by reading the voltage across the sense resistor. To adjust, send
CAL:DATA
com-
mands as needed (see PAR. 4.3b) to adjust the BOP output until the DVM reads as close as
possible above the nominal full scale value within tolerance specified in Table 4-4 for +FULL
SCALE CURRENT.
CAUTION
WIRES BETWEEN BOP OUTPUT AND
SENSE RESISTOR MUST BE RATED TO
CARRY THE RATED OUTPUT
CURRENT OF THE POWER SUPPLY.
AWG#6 IS RECOMMENDED.
WARNING
Содержание BOP-ME 1KW
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