NOVUS N322RHT User Manual

N322rht

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TEMPERATURE AND HUMIDITY

CONTROLLER

N322RHT

OPERATING MANUAL - V1.7x A

Man 5001234

SPECIFICATIONS

INPUT SENSOR:
Humidity measurement:

Accuracy:

Refer to Figure 01;

Stability:

< 1 %RH / year;

Range:

0 and 100 % RH

Linearity error:

<< 1 % RH;

Long term Stability: < 1 % RH

Response time: 4 seconds in the range from 10 to 90 %,
with slow moving air. Outside this range, up to 48 horas.

Temperature measurement:

Accuracy:

Refer to Figure 1;

Repeatability:

±0.1 °C;

Range:

-40 and 120 °C (-3.8 to 211.8 °F)

Response time:

up to 30 seconds in slow moving air.

WARM-UP: 15 minutes

MEASUREMENT RESOLUTION:

Temperature:

0.1º...........................................for indications between –19.9º and 119,9º
1º .................................................................................................... elsewhere

RH: ............................................................................................................................................... 1%

OUTPUT1:.............................. Relay SPDT; 1 HP 250 Vac / 1/3 HP 125 Vac (16 A Resistive)

OUTPUT2:.......................................................................................Relay: 3A / 250 Vac, SPST

POWER SUPPLY: ................................. 100~240 Vac (± 10 %) or 24 Vdc/ac (12~30 Vdc/ac)

............................................................Mains frequency: 50~60 Hz. Power consumption: 5 VA

Caution: check the power supply specification before energizing the controller.

DIMENSIONS:.......................................................... Width x Height x Depth: 74 x 32 x 75 mm

PANEL CUT-OUT: ..................................................................................................70 x 29 mm

WEIGHT: ...........................................................................................................................100 g

ENVIRONMENT:......................................... Operating temperature: 0 to 40 °C (32 to 122 °F)

...................................................................... Storage temperature: -20 to 60 °C (-4 to 140 °F)
.......................................................................... Relative humidity: 20 to 85 % non condensing

CASE:............................... Polycarbonate UL94 V-2; Protection: Front panel: IP65, Box: IP42

SUITABLE WIRING: ............................................................................................Up to 4.0 mm²

RS-485 digital communication; RTU MODBUS protocol (optional)

Serial interface not isolated from input circuitry.

Serial interface isolated from input circuitry, except in 24 V powered model.

Relative Humidity Accuracy at 25°C

Temperature Accuracy

Sensor Operating Conditions

Figure 01- RH and Temperature accuracies.

The 322RHT is a digital controller for relative humidity and temperature. Its 2 relay outputs
can be configured independently as control or alarm, either for temperature or relative
humidity. The RHT probe (3 m length) is provided along with the instrument.
The features of a particular model (mains supply, digital communication, etc) are identified by
the label placed on the controller body.

ELECTRICAL WIRING

It is important to follow the recommendations below:

•

Signal wires should be installed in grounded conduits and away from power or contactor

wires.

•

The instrument should have its own power supply wires that should not be shared with

electrical motors, coils, contactors, etc.

•

Installing RC filters (47 R and 100 nF, series combination) is strongly recommended at

contactor coils or any other inductors.

•

System failure should always be taken into account when designing a control panel to

avoid irreversible damage to equipment or people.

Figure 1 below shows the controller connections to sensor, mains and outputs.

Figure 02 – N322RHT terminals

OPERATION

The controller requires the internal parameters to be configured according to the intended use
for the instrument. The parameters are organized in 4 groups or levels:

Level

Function

Measurement

Setpoint Adjustment

Configuration

Calibration

Upon power-up, the N322RHT display shows for 1 second its firmware version. This
information is useful when consulting the factory.

Then, the measured input variable is shown on the display. This is the parameter level 0
(measurement level).

To access level 1, press

for 1 second until the “

SP1

1” message shows up. Pressing

again, the “

SP2

SP2” parameter is presented. To go back to level 0, press

once more.

To access level 2 of paramenters, press

for 2 seconds until the “

RKT

T” message is

shown. Release the

key to remain in this level. Each new pressing on the

key will

advance to the next parameter in the level. At the end of the level, the controller returns to the

first level (0). Use the

and

keys to alter a parameter value.

Notes: 1

A parameter configuration is saved when the

key is pressed to advance to

the next parameter in the cycle. The configuration is stored in a non-volatile
memory, retaining its value when the instrument is de-energized.

If no keyboard activity is detected for over 20 seconds, the controller saves the
current parameter value and returns to the measurement level.

Level 1 –Setpoint Adjustment

In this level only the Setpoint (

SP1

SP1 and SP2

SP2

SP2) parameters are available, alternating the

names with their respective values. Adjust the desired value for each setpoint clicking on the

and

keys.

SP1

Set Point 1

Set Point adjustment for control OUTPUT 1.

SP1

SP1 value is limited to the

values programmed in

SPL

SPL and SPk

SPk

SPk in the programming level (Parameter

configuration, level 2).

SP2

Set Point 2

Set Point adjustment for control OUTPUT 2.

SP2

SP2 value is limited to the

values programmed in

SPL

SPL and SPk

SPk

Level 2 – Configuration - Parameters configuration Level

Contains the configuration parameters to be defined by the user, according to the system’s

requirements. Use

and

keys to set the value. The display alternates the parameter

name and respective value.

rkt

RH - Temp

Defines how the variables, relative humidity and temperature, will be
displayed:

Relative Humidity

Temperature

Toggles the indication every 2 seconds.

Toggles the indication every 3 seconds.

Toggles the indication every 4 seconds.

Toggles the indication every 5 seconds.

For options

0 and 1

1, a fast click on the

key forces the other variable to

be displayed for 10 seconds.

Unt

Temperature Unit - Selects display indication for degrees Celsius or
Fahrenheit.

0 - Temperature Celsius
1

1 - Temperature in degrees Fahrenheit

0fk

RH Offset - Offset value to be added to the displayed relative humidity to
compensate for sensor mismatches (when replacing a sensor, for instance).
Adjustment range: between –10.0 and 10.0 % of RH. Default value: 0.0

0ft

Temperature Offset - Offset value to be added to the measured
temperature to compensate for sensor mismatches. Adjustment range:
between –10.0 and 10.0 % of RH. Default value: 0.0

Sl1

Lower limit value for

SP1

SP1 (minimum value with which SP1

SP1

SP1 can be

configured).

1 must be programmed with a lower value than sK1

sK1

sK1.

Sk1

Upper limit for

Sp1

Sp1 (maximum allowed value for Sp1

Sp1

Sp1). sK1

sK1

sK1 must be

programmed with a value lower than the one configured in

sl1

sl1.

Sl2

Lower limit value for

SP2

SP2 (minimum value with which SP2

SP2

SP2 can be

configured).

Sl2

Sl2 must be programmed with a lower value than sK2

sK2

sK2.

Sk2

Upper limit for

Sp2

Sp2 (maximum allowed value for Sp1

Sp1

Sp1). sK2

sK2

sK2 must be

programmed with a value lower than the one in

sl1

sl1.

ky1

OUTPUT 1 Hysteresis: defines the differential range between the input
variable value at which the OUTPUT 1 is turned on and the value at which it
is turned off. In degrees.

ky2

OUTPUT 2 Hysteresis: defines the differential range between the input
variable value at which the OUTPUT 2 is turned on and the value at which it
is turned off. In degrees.

Ac1

Control action for OUTPUT 1 :

Reverse: For heating or humidification. Outputs turn on when
variable is lower than SP (See

(nt

(nt parameter below).

Direct: For cooling or dehumidification. Output turns on when

variable is above SP.

Low (minimum value) alarm.

High (maximum value) alarm.

Low alarm with initial blocking.

High alarm with initial blocking

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