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Line power
The Model 2303 requires a line voltage of 100 to 240V and a line frequency of 50 to 60Hz.
Verification tests must be performed within this range.
Recommended test equipment
Table 1-1 summarizes recommended verification equipment. You can use alternate equip-
ment as long as that equipment has specifications at least four times better than corresponding
Model 2303, 2303B, or 2303-PJ specifications. Keep in mind, however, that test equipment
accuracy will add to the uncertainty of each measurement.
1. Full-range, 90-day, 23˚C various measurement points.
2. Characterize resistor using 4-wire ohms function and 20
Ω
range of DMM before use.
3. Used only for Model 2303-PJ. Characterize resistor using 4-wire ohms function and 200
Ω
range of DMM
before use. See Resistor considerations for temperature coefficient.
4. Used only for Models 2303 and 2303B. Characterize resistor using 4-wire ohms function and 20k
Ω
range of
DMM before use.
Resistor connections
When performing the verification tests, make connections to the test resistors as shown in
Figure 1-1. Be sure to connect the Model 2303 SENSE leads and DMM test leads as close to the
resistor body as possible.
Table 1-1
Recommended verification equipment
Description
Manufacturer/Model
Specifications
Digital Multimeter
Keithley 2001
DC Voltage
1
20V: ±22ppm
Resistance
1
20
Ω
: ±59ppm
200
Ω
: ±43ppm
20k
Ω
: ±36ppm
Precision Resistor
1
Ω
, 0.1%, 100W
2
Precision Resistor
30
Ω
, 0.1%, 50W
3
Precision Resistor
3k
Ω
, 0.1%, 0.25W
4
深圳德标仪器
135-1095-0799
Summary of Contents for 2303
Page 12: ...1 Performance Verification 135 1095 0799...
Page 26: ...2 Calibration 135 1095 0799...
Page 48: ...3 Disassembly 135 1095 0799...
Page 53: ...3 6 Disassembly 135 1095 0799...
Page 76: ...A Specifications 135 1095 0799...
Page 81: ...A 7 Specifications 135 1095 0799...
Page 82: ...B CalibrationReference 135 1095 0799...
Page 90: ...C CalibrationPrograms 135 1095 0799...