4
Recorder Output Connection
The 4-20mA output jack on the front panel allows continuous monitoring of dew point
over a period of time. The supplied mating connector can be wired as needed.
Pin 1:
4-20mA signal
Pin 2:
ground
CALIBRATION & MAINTENANCE
Dry-Down Test
Verify the Dew Point Monitor's ability to read dry air by performing the following steps:
Note: the supplied desiccant cartridge should be blue in color. After repeated use the
desiccant will turn pink. The desiccant can be recharged by removing one end cap,
emptying the contents into a Pyrex glass container, and baking at 350ºF or microwaving
until blue.
1.
Make sure the supplied desiccant cartridge is dry (contents should be blue in
color).
2.
Connect one end of the desiccant cartridge to the sample air inlet tubing and the
other end to the pump vent tubing.
3.
Turn the power on and allow 5 - 10 minutes for the reading to stabilize. A dry
desiccant cartridge will produce a dew point of -20ºF to -40ºF. If Dew Point
Monitor reading doesn't respond by indicating a low dew point, contact Plastic
Process Equipment for factory service.
Replacement Parts
DTR-30
.........Desiccant Tube
1205DM........Hygrosensor™
3305005......…In-Line Air Filter
