EATON ELECTRICAL
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Predictive Diagnostics
7 Appendix 3. Temperature Channel Calibration
InsulGard can be configured for 10Ohms, 100Ohms and 1000Ohms Pt RTDs. 120 Ohm Ni fits 100 Ohm
Pt range.
InsulGard is configured and calibrated at the factory for 100 Ohm Pt RTD, if other has not been specified.
Reconfiguring temperature channel requires hardware jumpers’ configuration and calibration. Procedures
are described below.
Hardware Configuration
Jumpers configuring InsulGard for different RTD resistance are inside the enclosure. Jumper position
should be selected according to pictogram printed on PCB. The figure 7.1 shows jumper configuration for
100 Ohm Pt RTD.
Note: Disconnect power source for hardware configuration! Pay attention to
flexible keypad cable connected to PCB while opening or closing InsulGard
enclosure!
Figure 7.1.
Calibration
You need two precise resistors representing temperatures of 0
0
C and 100
0
C for selected RTD type. The
table below shows these resistances for most common RTD types.
10 Ohm
100 Ohm
1000 Ohm
Flexible
Keypad
Cable
