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3-16 | Thermox Series 2000 WDG-HPII / HPIIC - ATEX
Manual Calibration Connections
If you have a Remote Calibration Unit (RCU), skip the remainder of
this section and proceed to the "RCU Mechanical Installation" sec-
NOTE
tion that follows.
If you don't have an RCU, simply connect calibration gases to the calibra-
tion gas inlet port on the sensor (see Figure 3-7). For this manual calibra-
tion setup, you need to plug the calibration inlet port when not being used
for calibrations.
Remote Calibration Unit Mechanical Installation
The ambient temperature range for the RCU is -20 to 70
RCU as close to the sensor as possible (Figure 3-8 shows mounting
dimentions). Shorter calibration plumbing improves response times, re-
duces calibration gas expense, and reduces the chance of contaminants in
the calibration gas plumbing.
For all RCU connections, use 1/4" O.D. tubing. Be sure to use
tubing that is free of oil and direct; we recommend stainless steel
NOTE
tubing.
Don't open the RCU enclosure until you verify that the area has been
!
classified as nonhazardous.
WARNING
This section is divided into instructions for O
O
and combustibles RCU connections. Use the appropriate instructions
2
when making the connections.
o
C. Mount the
-only RCU connections and
2
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Troubleshooting
