Keithley 2002

Performance Verification
1-18
RTD temperature reading checks
Use a precision decade resistance box (see Table 1-1) to sim-
ulate probe resistances at various temperatures (Table 1-12).
Be sure to use 4-wire connections between the decade resis-
tance box and the Model 2002.
Table 1-12
RTD probe temperature reading checks
RTD probe
type
Applied
resistance
Reading limits
(°C) 1 year,
18°C to 28°C
PT385
(α=0.00385)
22.80Ω
60.25Ω
100Ω
109.73Ω
138.50Ω
313.59Ω
-190.068 to -189.932
-100.021 to -99.979
-0.021 to +0.021
24.979 to 25.021
99.979 to 100.021
599.932 to 600.068
PT392
(α=0.00392)
63.68Ω
100Ω
109.90Ω
139.16Ω
266.94Ω
-90.021 to -89.979
-0.021 to +0.021
24.979 to 25.021
99.979 to 100.021
449.932 to 450.068
NOTE: Reading limits shown do not include uncertainty of resistance
standards.