NovaLynx Corporation
225-WS-32THA
Page 7
February 2021
The base of the probe is connected to the cable by an M8 connector. Shrink tubing has been applied
over the connection for added moisture protection. If is necessary to disconnect the cable, carefully
cut away the heat shrink tubing. The probe may be disconnected and returned to NovaLynx for a
calibration check, or the entire probe, cable and sunshield can be returned for service or a calibration
check. If only the probe is to be returned, inspect the cable carefully to ensure it is not the cause of any
problems you may have with the sensor.
7
CALIBRATION TEST KIT
The NovaLynx
220-HMK15 Humidity Calibrator
(sold separately) is available for checking the
calibration of electronic RH sensors by the user. The calibrator includes two chambers with saturated
salt solutions to test the sensor at 12% and 75% RH. Testing at two points verifies the overall operating
range of the humidity sensor. Spot checking at ambient conditions may not always detect a marginally
defective sensing element.
The calibration chambers work best in stable temperature conditions (indoors), but can also be used to
make quick and accurate field tests. In either case, the chamber humidity reading is corrected
according to the temperature indicated on a built-in thermometer. Sensor readings can be taken
within 5 minutes.
8
TROUBLESHOOTING
If the sensor’s output signal appears to be in error or is absent, check the power connections. At the
sensor cable, measure the input power source voltage with a voltmeter. Check each signal output by
disconnecting the signal wire from the monitoring equipment and then measure the output voltage.
If the sensor must be returned to NovaLynx, be sure to include a brief description of the problem plus
any relevant application notes. Contact customer service to receive a return goods authorization
number before shipping.
