6 AcuDew System Installation
6.1 AcuDew Installation: Sample Cell/Sample System*
Before mounting the transmitter into any system, ensure the system is safe to
work on. Depressurize and verify that all power connections are isolated, in the off
position.
Installation should be carried out by trained technicians and following local safety
protocols.
Ensure that the selected location for the sample cell or sample system
provides adequate working space and safe clearance for the proper
installation and removal of the transmitter.
Check that all pipe/tube connections and fittings are tightly secure. Leak
testing prior to the installation of the transmitter is recommended.
It is advisable to carry out an initial purge routine of the sample loop,
before installing the transmitter, to remove the possibility of sensor
damage on start up.
Ensure upstream/inlet isolation valves, as well as any downstream
isolation valves are closed prior to the installation of the transmitter.
Remove the shipping tube cover from the AcuDew before installing the
transmitter.
Install the AcuDew transmitter into the sample cell/transmitter holder and
tighten firmly to properly compress the O-ring seal.
Ensure there is adequate transmitter cable length to make connection to
the data acquisition system.
Orient the cable connector such that the transmitter pins correctly mate
with the cable connector.
The AcuDew is a 2-wire 4 to 20mA transmitter, loop powered by 12 to 28V DC.
Notes:
Pin 1 connects to the power supply (red wire in a Shaw Moisture
Meters supplied transmitter cable).
Pin 2 connects to the 4 to 20 mA current loop return (blue wire in a
Shaw Moisture Meters supplied transmitter cable).
See Section 5 for the transmitter’s wiring details.
* If using the AcuDew Transmitter in conjunction with a sample system, consult
the sample system instructions for proper start-up procedure and use.
Do not apply power until all wiring is completed and checked.
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