1072_B
8
June 2020
sure not to exceed the sample tubing temperature rating.
Turn on the 1072A. When a hopper is initially loaded with material, high dew
points at the hopper’s air return are normal while moisture is removed. The
initial reading will be high until the material begins to dry. It can take many
hours to dry some materials. If drying time is expected to be all day, leave the
1072A sample tubing connected, but keep the hygrometer turned off. Every
few hours, turn on the 1072A and allow at least 30 minutes for a reading. As
the material dries, the 1072A dew point reading will start to drop. Material
processing can begin when the dew point reading is at an acceptable level.
If the 1072A reading is stuck high, change the sampling point to the output of
the
dryer.
Follow the instructions for Dryer Performance Testing described
above to make sure the dryer is providing low dew point air to the hopper.
Remote Monitoring/Data Logging
The 1072 analog output jack can be used to monitor or log dew point over a
period of time.
The output jack is a 3 pin male M8 type connector. This connector accepts
standard threaded or snap fit female M8 cables.
Pin No. Wire Color* Signal
1
Brown
Ground
3
Blue
Ground
4
Black
0-5V
* wire color code of standard M8 cable assemblies
Note that the output scaling is -40
F to +70
F.
1
3
4
Connector pinout
(front view)
