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Type
Step
Local Calib.
1. ZERO
EXTERNAL
2. POSITIVE
PROTECTION,
Pos. Voltage
Neg. Voltage
Pos. Current
Neg. Current
(together)
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
•
Internal Impedance: better than 0.1 Ohms
•
Output Current: >0.5mA when sourcing, >0.15mA when sinking
MODEL
VALUE
BOP 10-75MG
BOP 20-50MG
0.001 OHM
BOP 36-28MG
BOP 50-20MG
BOP 72-14MG
0.01 OHM
BOP 100-10MG
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.
BOP-1K 080709
TABLE 4-1. CALIBRATION SUMMARY (CONTINUED)
Reference Type
and Value
External:
N/A
1. 0.0V
2. +10.0V
(Analog I/O Port
pins 14, 6, 13, 5
ref to pin12)
-5
TABLE 4-2. SUGGESTED SENSE RESISTORS
KEPCO PART NO.
115-3033
115-2997
Monitored
Output Conditions
Parameter
No requirements
MANUFACTURER
ISOTEK
ISOTEK
Notes
1. Automatic internal
measurement
2. Local Calibration
only.
MANUFACTURER PART NO.
RUG-Z-R001-0.1 TK10
RUG-Z-R010-0.1 TK10
4-3
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