KEPCO BOP 1KW-MG Operator Manual, Firmware Ver.2.38 to 2.47 - Manual (Page 131)

BOP-1K 080709
4-3
4.2 TEST EQUIPMENT REQUIREMENTS
Table 4-2 lists sense resistors recommended for measuring current and includes Kepco and
Manufacturer’s part numbers. The value of the sense resistor chosen should be known with
0.001% accuracy. If other than a recommended sense resistor is to be used, it must be rated for
at least 100W power dissipation (actual power dissipation will be approximately 10W). The ther-
mal coefficient of the sense resistor chosen should be 10 ppm or better.
The digital voltmeter (DVM) used to measure output voltage and the voltage across the current
sensing resistor should have at least six digits, multiple ranges, the smallest resolution must be
at least one microvolt and the accuracy must be at least 0.0001%.
To calibrate the external programming capabilities of the BOP a DC reference voltage with the
following minimum specifications is required.
• Value: 0.0V ±0.1mV and 10.0V ±0.1mV (either positive and negative or floating)
• Stability: better than 10
-5
• Internal Impedance: better than 0.1 Ohms
• Output Current: >0.5mA when sourcing, >0.15mA when sinking
Local Calib.
EXTERNAL
PROTECTION,
Pos. Voltage
Neg. Voltage
Pos. Current
Neg. Current
(together) 1. ZERO
2. POSITIVE External:
1. 0.0V
2. +10.0V
(Analog I/O Port
pins 14, 6, 13, 5
ref to pin12) N/A No requirements 1. Automatic internal
measurement
2. Local Calibration
only.
TABLE 4-2. SUGGESTED SENSE RESISTORS
MODEL VALUE KEPCO PART NO. MANUFACTURER MANUFACTURER PART NO.
BOP 10-75MG
BOP 20-50MG
BOP 36-28MG
0.001 OHM 115-3033 ISOTEK RUG-Z-R001-0.1 TK10
BOP 50-20MG
BOP 72-14MG
BOP 100-10MG
0.01 OHM 115-2997 ISOTEK RUG-Z-R010-0.1 TK10
NOTE: ALL SENSE RESISTORS MUST BE MOUNTED ON A HEATSINK WITH A MINIMUM SURFACE AREA OF 36 SQUARE
INCHES TO MAINTAIN THERMAL STABILITY DURING CALIBRATION; FORCED CCOOLING IS RECOMMENDED.
KEPCO HEATSINK P/N 136-0451 WILL PROVIDE ADQUATE COOLING FOR THE SENSE RESISTOR.
TABLE 4-1. CALIBRATION SUMMARY (CONTINUED)
Type Step
Reference Type
and Value
Monitored
Parameter
Output Conditions Notes