Keithley 2306 User Manual

13-4 Performance Verification
Recommended test equipment
Table 13-1 summarizes recommended verification equipment. You can use alternate
equipment as long as that equipment has specifications at least four times better than
correspon
ding Model 2306 specifications. Keep in mind, however, that test equipment accuracy
will add to the uncertainty of each measurement.
Table 13-1
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
2
1
Full-range, 90-day, 23°C various measurement points.
2
Characterize resistor using 4-wire ohms function of DMM before use.
3
Required only for Models 2306-PJ and 2302-PJ. Characterize resistor using 4-wire ohms function and 200OHM
range of DMM before use. See Resistor considerations for temperature coefficient.
Resistor connections
When performing the verification tests that use the precision resistors, be sure to connect the
Model 2306 OUTPUT #1 or OUTPUT #2 SENSE leads and DMM test leads as close to the
resistor body as possible.
Resistor considerations
The test resistors should be characterized using the lowest possible range and the 4-wire ohms
function of the DMM recommended in Table 13-1 to measure the resistance values. Use the
measured resistance values to calculate the actual currents during the test procedures.
NOTE The temperature coefficient and temperature change of the 1Ω
resistor when passing
current at full load must be low enough so that the change in resistance does not cause
incorrect readings. This is summarized in the following equation:
V
OUT
RRΔ+()
----------------------
25% of Model 2306 amps specification<
where: V
OUT
is the Model 2306 output voltage
R is the characterized value of the resistor
ΔR is the change
in resistance caused by heating
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Keithley 2306 Specifications

General

Brand	Keithley
Model	2306
Category	Power Supply
Language	English