6 rtd accuracy, Rtd accuracy -6 – GE 489 User Manual
Page 218
7-6
489 Generator Management Relay
GE Multilin
7.2 HARDWARE FUNCTIONAL TESTS
7 TESTING
7
7.2.6 RTD ACCURACY
The specification for RTD input accuracy is
±2° for Platinum/Nickel and ±5° for Copper. Perform the steps below.
1.
Alter the following setpoints:
S8 RTD TEMPERATURE
Ö
RTD TYPE
Ö
STATOR RTD TYPE:
"100 Ohm Platinum" (select desired type)
S8 RTD TEMPERATURE
ÖØ
RTD #1
Ö
RTD #1 APPLICATION:
"Stator" (repeat for RTDs 2 to 12)
2.
Measured values should be
±2°C / ±4°F for platinum/nickel and ±5°C / ±9°F for copper. Alter the resistance applied to
the RTD inputs as shown below to simulate RTDs and verify accuracy. View the measured values in
A2 METERING DATA
ÖØ
TEMPERATURE
.
APPLIED
RESISTANCE
100
Ω PLATINUM
EXPECTED RTD
TEMPERATURE READING
MEASURED RTD TEMPEATURE
SELECT ONE: ____°C ____°F
°C
°F
1
2
3
4
5
6
7
8
9
10
11
12
84.27
Ω
–40°C
–40°F
100.00
Ω
0°C
32°F
119.39
Ω
50°C
122°F
138.50
Ω
100°C
212°F
157.32
Ω
150°C
302°F
175.84
Ω
200°C
392°F
194.08
Ω
250°C
482°F
APPLIED
RESISTANCE
120
Ω NICKEL
EXPECTED RTD
TEMPERATURE READING
MEASURED RTD TEMPEATURE
SELECT ONE: ____°C ____°F
°C
°F
1
2
3
4
5
6
7
8
9
10
11
12
92.76
Ω
–40°C
–40°F
120.00
Ω
0°C
32°F
157.74
Ω
50°C
122°F
200.64
Ω
100°C
212°F
248.95
Ω
150°C
302°F
303.46
Ω
200°C
392°F
366.53
Ω
250°C
482°F
APPLIED
RESISTANCE
100
Ω NICKEL
EXPECTED RTD
TEMPERATURE READING
MEASURED RTD TEMPEATURE
SELECT ONE: ____°C ____°F
°C
°F
1
2
3
4
5
6
7
8
9
10
11
12
77.30
Ω
–40°C
–40°F
100.00
Ω
0°C
32°F
131.45
Ω
50°C
122°F
167.20
Ω
100°C
212°F
207.45
Ω
150°C
302°F
252.88
Ω
200°C
392°F
305.44
Ω
250°C
482°F
APPLIED
RESISTANCE
10
Ω COPPER
EXPECTED RTD
TEMPERATURE READING
MEASURED RTD TEMPEATURE
SELECT ONE: ____°C ____°F
°C
°F
1
2
3
4
5
6
7
8
9
10
11
12
7.49
Ω
–40°C
–40°F
9.04
Ω
0°C
32°F
10.97
Ω
50°C
122°F
12.90
Ω
100°C
212°F
14.83
Ω
150°C
302°F
16.78
Ω
200°C
392°F
18.73
Ω
250°C
482°F