Specifications

RAWS-F Remote Automated Weather Station for Fire Weather
FIGURE 4.2-1. Air temperature and relative humidity
4.2.2 Wiring, Air Temperature and Relative Humidity (part #HMP45C-QD)
The temp/RH sensor is connected to the RAWS connector panel “TEMP/RH”
connector COLOR CODED ORANGE. This sensor is internally wired from
the RAWS connector panel to the CR1000 datalogger.
Connector Panel “TEMP/RH” connector COLOR CODED ORANGE
Connector Pin A Temp Hi to CR1000 1L
Connector Pin B Sensor excitation to CR1000 EX1
Connector Pin C Sensor signal Lo/AG to CR1000 AG
Connector Pin D Power ground to CR1000 Ground
Connector Pin E RH signal to CR1000 1H
Connector Pin F SW_12V to CR1000 SW_12V
4.2.3 Maintenance, Air Temperature and Relative Humidity (part
#HMP45C-QD)
The temp/RH sensor requires minimal maintenance. Check monthly to make
sure the radiation shield is free from debris. The filter at the end of the sensor
should also be checked for contaminates. When installed in close proximity to
the ocean or other bodies of salt water, a coating of salt may build up on the
radiation shield, sensor, filter and even the RH chip. A buildup of salt on the
filter or RH chip will delay or destroy the response to atmospheric humidity.
The filter can be rinsed gently in distilled water. If necessary, the chip can be
removed and rinsed as well. Do not scratch the RH chip while cleaning.
8