Performance Verification 1-3
Linepower
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.
Recommendedtestequipment
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 20Ω range of DMM before use.
3. Used only for Model 2303-PJ. Characterize resistor using 4-wire ohms function and 200Ω 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 20kΩ range of
DMM before use.
Resistorconnections
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
20Ω: ±59ppm
200Ω: ±43ppm
20kΩ: ±36ppm
Precision Resistor 1Ω, 0.1%, 100W
2
Precision Resistor 30Ω, 0.1%, 50W
3
Precision Resistor 3kΩ, 0.1%, 0.25W
4
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