Delta OHM HD2817T Series, Manual

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10
7. Measurement probe and calibration of the relative
humidity sensor
The instrument only accepts SICRAM2 type temperature and relative humidity measurement
probes. These probes are fitted with an electronic circuit that converts the signal and stores
their calibration information.
Thanks to their factory calibration, the probes are interchangeable, directly and immediately.
The probes can be sent to our factory for calibration or repair.
Saturated solutions are available for the humidity probe’s checking and calibration.
For the calibration of the humidity sensor, DeltaLog12 software is to be used: see procedure
reported in the software’s instruction manual.
The calibration of the temperature sensor by the user is not required.
The interchangeable probe allows reducing the instrument down time virtually to zero, in case
of faulty probe.
The replacement can be performed without stopping the activity, thanks to the “suspend”
functioning mode.
In the HD2817TO.xx models, the probe is fixed on the instrument back using three
screws.
To replace the horizontal probe:
Start the suspend function.
Unscrew the three screws fixing the probe housing module to the instrument.
Extract the probe from the instrument connector: the probe to be replaced can be
removed.
Connect the new probe to the instrument.
Fix the module to the instrument back using the three screws.
The replacement is complete.
Note: if necessary, the suspension time can be reset to 60 seconds by pressing the

arrow.
Module mounting screws
Probe housing module
Female connector
Male connector