1523, 1524 Reference Thermometer
Manual Calibration
78
Table 25
Test Equipment Specifications
Classification
Minimum Use
Recommended Equipment
Voltage Source
± 6ppm ± 0.6uV
Fluke 5700
4 wire Reference Resistors
See Total Uncertainty column
Table X
Vishay VHP100 Resistors
4 wire cable
Low resistance, Low EMF
N/A
Lemo Connector
6 pin
LEMO PAG.M0.6GL.AC39G
Table 26
Standard Reference Resistor Specification
U
S1
(k=2)
U
S2
(k=2)
U
T
(k=2)
Resistance
Reference
Resistor
Uncertainty
(ppm)
Reference
Resistor
Uncertainty (Ω)
TCR
Uncertainty
(ppm)
TCR
Uncertainty (Ω)
Total
Uncertainty (Ω)
Total
Uncertainty
(ppm)
0
--
0.00004
--
--
0.000540
--
25
28
0.0007
0.3
0.0000075
0.000700
28.0016
75
15.73
0.00117975
0.3
0.0000225
0.001180
15.7329
100
14
0.0014
0.3
0.00003
0.001400
14.0032
200
11.5
0.0023
0.3
0.00006
0.002301
11.5039
400
10.25
0.0041
0.3
0.00012
0.0041
10.2544
10000
35
0.35
0.3
0.003
0.3500
35.0013
40000
26.25
1.05
0.3
0.012
1.0501
26.2517
100000
74
7
0.3
0.03
7.0001
70.0006
300000
70
21
0.3
0.09
21.0002
70.0006
500000
70
35
0.3
0.15
35.0003
70.0006
Table 27
Standard Voltage Reference Specification
Voltage mV
Reference Voltage Total
Uncertainty (mV)
–10
0.00125
0
0.00110
25
0.00145
75
0.00210
7.7 Manual
Calibration
7.7.1 General
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