Temp
°C
Platinum TCR 0.00385 Nickel TCR 0.00618 Copper
TCR
0.00427
Pt 100 Pt 250 Ni 100 Ni 120 Ni 250 Cu 10
60 123.24 308.1 135.3 162.36 338.25 11.352
70 127.07 317.675 141.7 170.04 354.25 -
80 130.89 327.225 148.3 177.96 370.75 12.124
90 134.7 336.75 154.9 185.88 387.25 -
100 138.5 346.25 161.8 194.16 404.5 12.897
120 146.06 365.15 176 211.2 440 13.669
140 153.58 383.95 190.9 229.08 477.25 14.442
150 - - 198.6 238.32 496.5 -
160 161.04 402.6 206.6 247.92 516.5 15.217
180 168.46 421.15 223.2 267.84 558 -
200 175.84 439.6 240.7 288.84 601.75 -
3.13.2.10 RTD/mA input connection
RTD inputs can be used with a 2-wire or 3-wire connection with common ground.
When using the 3-wire connection, it is important that all three wires connecting the
sensor are symmetrical, that is, the wires are of the same type and length. Thus the
wire resistance is automatically compensated.
In the 2-wire connection, the lead resistance is not compensated. This scheme
may be adopted when the lead resistance is negligible when compared to the RTD
resistance or when the error so introduced is acceptable for the application in which
it is used.
3.13.2.11 RTD/mA card variants
The available variants of RTD cards are 6RTD/2mA and 2RTD/1mA. The features are
similar in both cards.
The available variants of RTD cards are 6RTD/2mA and 2RTD/1mA/3SO with an RTD
capability. The features are similar in both cards.
6RTD/2mA card
This card accepts two milliampere inputs and six inputs from the RTD sensors. The
inputs 1 and 2 are used for current measurement, whereas inputs from 3 to 8 are
used for resistance type of measurements.
RTD/mA input connection
Resistance and temperature sensors can be connected to the 6RTD/2mA board
with 3-wire and 2-wire connections.
1MRS757644 H
Basic functions
620 series
Technical Manual
125
To Next Page
Loading...
