Nortec NHPC User Manual

37 | Start Up
Modulating Control
The modulating controls use a PI control algorithm to transmit a 0-10V control signal to the
humidifier. Adjust the setpoint to the desired setting by using the up/down arrow buttons on
the controller.
On/Off Control
The On/Off controls use a PI control algorithm to open and close a relay that opens and closes
the humidifier’s On/Off loop. Adjust the setpoint to the desired setting by using the up/down
arrow buttons on the controller.
Transducer Control
The transducer controls transmit a 2-10V control signal proportional to the sensed relative
humidity to the humidifier. Humidity setpoint is not set at the transducer. The setpoint is set on
the NHTC/PC’s display and keypad.
Note: It is possible to field calibrate NORTEC Digital controls if the displayed humidity is found
to be different than a known trusted source. See Digital Humidistat on page 71 of
chapter on Troubleshooting.
Figure 34: Transducer Control Operation
Humidity (RH %)
Option button accesses
sensor calibration.
See troubleshooting
Adjust calibration
while in calibration
mode
Power button will
display “NO” if an
attempt is made to
turn off the transducer.

Nortec NHPC Specifications

General

Brand	Nortec
Model	NHPC
Category	Humidifier
Language	English