5-7
MODEL 54 C
SECTION 5
DIAGNOSTICS AND TROUBLESHOOTING
5.5 RTD RESISTANCE VALUES
Table 5-3 (below) is a ready reference of RTD resist-
ance values at various temperatures. These are used
for test and evaluation of the sensor.
NOTE
Ohmic values are read across the RTD element and
are based on the manufacturer’s stated values of
(±1%). Allow enough time for the RTD element in the
sensor to stabilize to the surrounding temperature.
Table 5-3. RTD Resistance Values
Temperature Pt-100
Pt-1000
Resistance
Resistance
0°C
100.00 ohms
1000 ohms
10°C
103.90 ohms
1039 ohms
20°C
107.79 ohms
1078 ohms
25°C
109.62 ohms
1096 ohms
30°C
111.67 ohms
1117 ohms
40°C
115.54 ohms
1155 ohms
50°C
119.40 ohms
1194 ohms
60°C
123.24 ohms
1232 ohms
70°C
127.07 ohms
1271 ohms
80°C
130.89 ohms
1309 ohms
90°C
134.70 ohms
1347 ohms
100°C
138.50 ohms
1385 ohms
5.6 CIRCUIT BOARD
REPLACEMENT
If it is necessary to replace the CPU Circuit Board or
Power Supply Circuit Board, specific procedures for
calibration (included with the new circuit board) must
be followed exactly or the microprocessor will be
improperly programmed. Should this occur, it will be
necessary to return the entire analyzer to the factory
for reprogramming.
for part numbers of replacement
boards and other parts.
Summary of Contents for 54C
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