Watlow Series D8 - Manual (Page 193)

Series D8 User’s Guide Chapter 7: Troubleshooting and Reconfiguring
Doc. 0600-3120-2000 Watlow Anafaze 175
RTD Inputs
For each RTD input, you must install three resistors: RA, RB,
and RC. The resistance must be correct for the expected input
range. RA and RB are a matched pair of resistors. Install them
in the resistor pack (RP) locations as shown in the illustration
below.
Resistor values:
•
RA/RB: 25 k Ω
• RC: 18.2 Ω
Resistor tolerances:
•
RA/RB: Matched to 0.02% ( ± 5 ppm/°C) with absolute
tolerance of 0.1% ( ± 25 ppm/°C)
• RC: Accurate to 0.05% ( ± 5ppm/°C)
Table 7.9 Resistor Locations for RTD Inputs
Loop
Resistor Values
RA/RB RC
1 RP1 R57
2 RP2 R55
3 RP3 R53
4 RP3 R51
5 RP4 R49
6 RP5 R47
7 RP6 R45
8 RP7 R43
RP#
RA RB