Table; Verification And Calibration Equipment - Keithley 2001-TCSCAN Instruction Manual

4. Coat the probe with a thermally conductive compound,
and insert it into the 0.110" hole marked "CAL" on the
Model 2001-TCSCAN printed circuit board.
5. Use the Model 2001 #1 front panel CHAN key to close
Channel 1.
6. Take a reading from the reference thermometer (T
the following equation to calculate the equivalent refer-
ence junction output voltage (V

Table 4-1

Verification and calibration equipment
Description
DMM*
Electrometer w/voltage source
Sensitive Digital Voltmeter
Triax cable (unterminated)
Low thermal cable (untermi-
nated)
Thermistor probe
Reference thermometer
Distilled water ice bath
(Dewar flask or Thermos)
#22 AWG solid copper wire
#22 AWG Teflon-insulated
stranded wire
* Two DMMs are required for thermistor calibration method and reference junction test.
). Use
J
):
REF
Model or part
Keithley Model 2001
Keithley Model 6517
Keithley Model 182
Keithley Model 237-
ALG-2
Keithley Model 1484
Thermometrics Series
CSP A207A
—
—
—
—
+ 273.15) × 0.0002
V = (T
REF J
7. Read the voltage across the output of OUT A (Model
2001 #2). Compare the measured and calculated voltag-
es. If they differ by more than 72 µ V (0.36 ° C), perform
the calibration procedure of paragraph 4.4.1.
Specifications Applications
20Ω, 72ppm Path resistance
200kΩ, 90ppm Calibration
200mV, 37ppm Reference junction, calibration
20pA, 200pA; 1.6% Offset current, path isolation
200V source; 0.05%
3mV; 60ppm Contact potential
— Offset current
— Contact potential
±0.005°C accuracy
Reference junction, calibration
±0.01°C w/thermistor
Reference junction, calibration
±0.1°C
Calibration
— Path resistance
— Path isolation
Service Information
4-3