Connecting the On-Board Thermistor
Figures 2-11 and 2-12 show how to use the HP Scanning A/D Converter
module to make temperature measurements with or without using the
on-board thermistor. The thermistor is used for reference junction
temperature sensing for thermocouple measurements. Figure 2-11 shows
the configuration for the HP E1313 terminal module and Figure 2-12 shows
the configuration for the HP E1413 terminal module.
fig2-7r
Pry at this point
Pry
Under Cover
REMote
Place both JM1 jumpers here to
route current source to terminals
HTI and LTI. Connect these
terminals to remote thermistor or
RTD. Sense with any sense
channel.
LOCAL
Place both JM1 jumpers here to
connect current source to
on-board thermistor RT1. Sense
RT1 by connecting any sense.
Figure 2-11. Temperature Sensing for HP E1313 Terminal Module
46 Field Wiring
Chapter 2
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