Rtd Temperature Vs. Resistance - ABB RED615 Technical Manual

1YHT530004D05 D
3.11.2.9
615 series
Technical Manual
Example of X130 (RTD) analog input deadband supervision
Temperature sensor Pt100 is used in the temperature range of 15...180 °C. Value
unit "Degrees Celsius" is used and the set values Value minimum and Value
maximum are set to 15 and 180, respectively.
Value deadband = 7500 (7,5% of the total measuring range 165)
AI_VAL# = AI_DB# = 85
If AI_VAL# changes to 90, the reporting delay is:
( 180 15 − ) × 7500 1000
t s ( )
=
90 85 100 − ×
GUID-F47EF6B6-9A14-44A2-AD19-BC067E4A7D78 V1 EN
Table 53: Settings for X130 (RTD) analog input deadband supervision
Function
X130 (RTD) analog input
Since the function can be utilized in various measurement modes,
the default values are set to the extremes; thus, it is very important
to set correct limit values to suit the application before the
deadband supervision works properly.

RTD temperature vs. resistance

Table 54: Temperature vs. resistance
Temp Platinum TCR 0.00385
°C
Pt 100
-40 84.27
-30 88.22
-20 92.16
-10 96.09
0 100
10 103.9
20 107.79
30 111.67
40 115.54
50 119.4
60 123.24
70 127.07
Table continues on next page
/
2 5 , s
≈
%
Setting
Value deadband
Nickel TCR 0.00618
Pt 250 Ni 100
210.675 79.1
220.55 84.1
230.4 89.3
240.225 94.6
250 100
259.75 105.6
269.475 111.2
279.175 117.1
288.85 123
298.5 129.1
308.1 135.3
317.675 141.7
Section 3
Basic functions
(Equation )
Maximum/minimum (=range)
Value maximum / Value minimum
(=20000)
Ni 120 Ni 250
94.92 197.75
100.92 210.25
107.16 223.25
113.52 236.5
120 250
126.72 264
133.44 278
140.52 292.75
147.6 307.5
154.92 322.75
162.36 338.25
170.04 354.25
Copper TCR
0.00427
Cu 10
7.49
-
8.263
-
9.035
-
9.807
-
10.58
-
11.352
-
91