Emerson 5081-T User Manual
Page 87
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MODEL 5081-T
SECTION 10.0
DIAGNOSIS AND TROUBLESHOOTING
10.6 RTD RESISTANCE VALUES
Table 10-4 is a ready reference of RTD resistance values
at various temperatures. These are used for test and
evaluation of the sensor.
NOTE
Resistance values are read across the RTD
element and are based on the manu-
facturer ’s stated values (±1%). Allow
enough time for the RTD element in the
sensor to stabilize to the surrounding
temperature (10 min).
Temperature Pt-100
Pt-1000
(°C)
Resistance (ohms) Resistance (ohms)
0
100.00
1000
10
103.90
1039
20
107.79
1078
25
109.62
1096
30
111.67
1117
40
115.54
1155
50
119.40
1194
60
123.24
1232
70
127.07
1271
80
130.89
1309
90
134.70
1347
100
138.50
1385
Table 10-4. RTD Resistance Values.
FIGURE 10-5. Conductivity Determination
FORMULA:
EXAMPLE:
cell constant value x 1,000,000
desired simulated conductivity in
µs/cm
.01 x 1,000,000
10
µs/cm
Use the following formula to determine the appropriate resistance value to use to simulate a
conductivity value:
= resistance in ohms
= use 1,000 ohm resistance