Conair 150 - Checking the Dewpoint

5
Maintenance
Maintenance l 5-3
✐
NOTE: Portable dewpoint moni-
tors purchased from Conair are
provided with a male connector
that plugs into the Dewpoint
Check port. If you purchased
your portable instrument else-
where, the male connector is
available through the Conair
parts department.
NOTE: The dewpoint check port
was not included on early dry-
ers. It can be added easily.
Contact the Conair parts depart-
ment or follow the alternate
procedure.
✐
(continued)
Replacement dewpoint moni-
tors, male connectors and
dewpoint check ports are
available from Conair.
Contact Conair Parts
(800) 458 1960
From outside of the
United States, call:
(814) 437 6861
Checking the Dewpoint
It is a good idea to monitor the dewpoint performance of your dryer periodically
with a calibrated portable dewpoint monitor, to ensure it is performing at maxi-
mum capacity. Even if your dryer has a dewpoint readout, comparing it to a
portable instrument periodically will confirm that the dewpoint sensor and readout
is performing properly.
To check dewpoint:
1 Connect your portable dewpoint meter to the
dewpoint check port of the dryer.
2 Turn on the portable instrument, and ensure
there is positive airflow through the sensor.
3 Monitor the readout and allow ample time for it to stabilize before
disconnecting it. Some dewpoint monitors require a substantial amount of
time for residual moisture to be purged from the sensor.
4 In the event the dewpoint in not satisfactory, refer to the Troubleshooting
section of the manual, alarm P9.
Alternate Procedure: (for dryers with no dewpoint check port)
1 Stop dryer and allow it to cool.
2 Open the right side panel of the dryer, and locate the process heater tube.
3 At the bottom end (cool air inlet) of the process heater tube, remove
1/8 inch NPT pipe plug and connect your portable dewpoint monitor at
this location. If there are existing connections for the dryer’s dewpoint sensor,
locate a 2nd 1/8 inch NPT port, or connect your dewpoint sensor in series with
the dryer sensor. Do not install a tee to split the air between the dryer’s sensor
and your portable instrument. This may cause one of them to be starved for
adequate sample air.
4 Turn on the dryer.