PRECISE-LOG Data Loggers User’s Manual
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PL-T/PL-TW
(WIFI enabled)
– Thermocouple Inputs
Besides the on-board thermistor channel, PL-T/PL-TW (WIFI enabled) logger has eight
external voltage DC channels used to measure thermocouple probes or small voltage signals.
The following figure illustrates the correct input connections:
Thermocouple Input Connections
Note: All inputs must share the same common ground.
Channel and Sensor Specifications:
Connections:
Plugeable terminal block for eight external channels
Channels:
CH0: on-board thermistor (-40 ~ +70°C) (-40 to + 158°F).
CH1 to CH8: Eight external Voltage DC with software
programmable input range selections for each channel:
Range1: -8 to +73 mV
Range3: -2 to +18 mV
Resolution:
0.0018%
Accuracy:
Thermistor channel: +/- 0.2°C(0°C ~ 70°C)
Voltage channels:
Range:(-8 to +73 mV:
+/- 0.1% (0.08 mV) @ 25°C + T/C Accuracy
Range -2 to +18 mV:
+/- 0.15% (0.03 mV) @ 25°C + T/C Accuracy
Over-voltage protection:
+/- 20 VDC
