NOVUS N322RHT User Manual

TE MPE RAT URE A ND HUM IDI TY

CO NTR OL LER

N322RHT

OP ERA TIN G MAN UAL - V1.7x A

SPECIFICATIONS

INPUT SENSOR: Humidity measurement: Accuracy: Refer to Figure 01;

Temperature measurement: Accuracy: Refer to Figure 1;

WARM-UP: 15 minutes

MEASUREMENT RESOLUTION:

Temperature: 0.1º...........................................for indications between –19.9º and 119,9º

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

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.

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.

1º.................................................................................................... elsewhere

Temperature Accuracy

Sensor Operating Conditions

Figure 01- RH and Temperature accuracies.

Man 5001234

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

0 Measurement

1 Setpoint Adjustment

2 Configuration

3 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 “SP again, the “SP2

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

SP2SP2

To access level 2 of paramenters, press for 2 seconds until the “RK 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.

2 If no keyboard activity is detected for over 20 seconds, the controller saves the

current parameter value and returns to the measurement level.

SP1111” message shows up. Pressing

SPSP

RKTTTT” message is

RKRK

Level 1 –Setpoint Adjustment

In this level only the Setpoint (SP1 names with their respective values. Adjust the desired value for each setpoint clicking on the

and keys.

SP1

SP1SP1

Set Point 1

SP2

SP2SP2

Set Point 2

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

rktrkt

RH - Temp

Unt

UntUnt

0fk

0fk0fk

0ft

0ft0ft

Sl1

Sl1Sl1

Sk1

Sk1Sk1

Sl2

Sl2Sl2

Sk2

Sk2Sk2

ky1

ky1ky1

ky2

ky2ky2

Ac1

Ac1Ac1

Set Point adjustment for control OUTPUT 1. SP1 values programmed in SPL configuration, level 2).

Set Point adjustment for control OUTPUT 2. SP2 values programmed in SPL

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

0000 Relative Humidity 1111 Temperature 2222 Toggles the indication every 2 seconds. 3333 Toggles the indication every 3 seconds. 4444 Toggles the indication every 4 seconds. 5555 Toggles the indication every 5 seconds.

For options 0000 and 1111, a fast click on the key forces the other variable to be displayed for 10 seconds.

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

0000 - Temperature Celsius 1111 - Temperature in degrees Fahrenheit

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

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

Lower limit value for SP1 configured). S

Upper limit for Sp1 programmed with a value lower than the one configured in sl1

Lower limit value for SP2 configured). Sl2

Upper limit for Sp2 programmed with a value lower than the one in sl1

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.

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.

Control action for OUTPUT 1 :

0000 Reverse: For heating or humidification. Outputs turn on when

1111 Direct: For cooling or dehumidification. Output turns on when

2222 Low (minimum value) alarm. 3333 High (maximum value) alarm. 4444 Low alarm with initial blocking. 5555 High alarm with initial blocking

SP1 and SP2

SP2) parameters are available, alternating the

SP1 SP1

SP2SP2

SP1 value is limited to the

SPL and SPk

SPk in the programming level (Parameter

SPLSPL

SPk SPk

SPL and SPk

SPk

SPLSPL

SPk SPk

SP1 (minimum value with which S P1

Sllll1

S S

Sl2 must be programmed with a lower value than sK2

Sl2 Sl2

variable is lower than SP (See (n t

variable is above SP.

SP1SP1

1 must be programmed with a lower value than sK1

1 1

Sp1 (maximum allowed value for S p1

Sp1Sp1

SP2 (minimum value with which S P2

SP2SP2

Sp2 (maximum allowed value for Sp1

Sp2Sp2

SP1SP1

SP2 value is limited to the

SP2SP2

Sp1). sK1

Sp1Sp1

sl1.

sl1sl1

Sp1). sK2

Sp1Sp1

sl1.

sl1sl1

(nt parameter below).

(nt(nt

SP1 can be

SP1 SP1

sK1 must be

sK1sK1

SP2 can be

SP2 SP2

sK2 must be

sK2 sK2

sK1.

sK1sK1

sK2.

sK2sK2

Ac2

Ac2Ac2

(nt

(nt(nt

of1

of1of1

on1

on1on1

dl1

dl1dl1

of2

of2of2

on2

on2on2

dl2

dl2dl2

Add

AddAdd

Action 2 - Control OUTPUT 2 action or Alarm functions:

0000 Reverse control action (heating or humidification). (See (nt

parameter below).

1111 Direct control action (cooling or dehumidification). 2222 Low (minimum value) alarm. 3333 High (maximum value) alarm. 4444 Alarm inside the range 5555 Alarm outside the range. 6666 Low alarm with initial blocking. 7777 High alarm with initial blocking. 8888 Inside the range alarm with initial blocking. 9999 Outside the range alarm with initial blocking.

The section Working with the RHT Controller describes how these functions work.

Assigns the relay for each variable:

0000 OUTPUT 1 = RH; OUTPUT 2 = RH; 1111 OUTPUT 1 = RH; OUTPUT 2 = Temperature; 2222 OUTPUT 1 = Temperature; OUTPUT 2 = RH; 3333 OUTPUT 1 = Temperature; OUTPUT 2 = Temperature;

Off time 1 - Defines the minimum off time for control OUTPUT 1. Once OUTPUT 1 is turned off, it remains so for at least the time programmed in

of1

of1. For thermocouple inputs this parameter is not available. This

of1of1

parameter is intended for refrigeration systems where longer compressor life is desired. For heating systems, program of1 to 999 s.

On time 1 - Defines the minimum on time for control OUTPUT 1. Once turned on, OUTPUT 1 remains so for at least the time programmed in on1 For thermocouple inputs this parameter is not available. This parameter is intended for refrigeration systems where increased compressor life is desired. For heating systems, program on1 999 s.

Delay 1 - Delay time to start control. Upon power-on, control OUTPUT 1 is kept off until the time programmed in dl1 prevent multiple compressors to start simultaneously after the turn-on of a system with several instruments. Value in seconds, 0 to 250 s.

Off time 2 - Defines the minimum off time for control OUTPUT 2. Once OUTPUT 2 is turned off, it remains so for at least the time programmed in

of2

of2. For thermocouple inputs this parameter is not available. This

of2of2

parameter is intended for refrigeration systems where increased compressor life is an issue. For heating systems, program on2 seconds, 0 to 999 s.

On time 2 - Defines the minimum on time for control OUTPUT 2. Once turned on, OUTPUT 2 remains so for at least the time programmed in on2 For thermocouple inputs this parameter is not available. This parameter is intended for refrigeration systems where increased compressor life is desired. Value in seconds, 0 to 999 s. For heating systems, program o f2 zero.

Delay 2 - Delay time for OUTPUT 2 to turn on relative to OUTPUT 1. This parameter defines a particular working mode, typically used in multiple stage systems, where OUTPUT 2 is allowed to go on only if OUTPUT 1 is already on for at least dL2 OUTPUT 1 goes off. dL2 250 s.

Adress – The parameter Add optional RS485 Modbus RTU communication interface.

Set a unique Modbus address for each equipment connected to the network. Address range is from 1 to 247.

dL2 seconds. Also, OUTPUT 2 is driven off whenever

dL2dL2

dL2= 0

0 disables this function. Value in seconds, 0 to

dL2dL2

0 0

Add is presented in instruments loaded with the

Add Add

of1 to zero. Value in seconds, 0

of1 of1

on1 to zero. Value in seconds, 0 to

on1 on1

dl1 is elapsed. Its usage is intended to

dl1dl1

on2 to zero. Value in

on2 on2

(nt

(nt(nt

on1.

on1on1

on2.

on2on2

of2 to

of2 of2

Level 3 – Calibration level

The N322RHT is factory calibrated. The following parameters should be accessed only by experienced personnel. To enter this cycle, the key must be kept pressed for 4 seconds.

Don’t press the and keys if you are not sure of the calibration procedures. Just press the key a few times until the measurement level is reached again.

pas

paspas

[Al

[Al[Al

[Ak

[Ak[Ak

[JL

[JL[JL

FA(

FA(FA(

Prt

PrtPrt

Pa(

Pa(Pa(

Sn2

Sn2Sn2

sn1

sn1sn1

sn0

sn0sn0

Password - Enter the correct password to unlock write operations for the parameters in the following levels.

Calibration low - Offset value of the input. It adjusts the lower measurement range of the sensor.

Calibration High - Gain calibration. It adjusts the upper measurement range of the sensor.

Cold Junction Offset calibration - This parameter is available only for thermocouple.

Factory Calibration - Restores factory calibration parameters. Change from 0 to 1 to restore the calibration parameters with factory values.

Protection - Defines the levels of parameters that will be password protected. See "Configuration Protection" for details.

Password Change - Allows changing the current password to a new one. Values from 1 to 999 are allowed.

Serial number - First part of the electronic serial number of the instrument. This is a read only parameter.

Serial number - Second part of the electronic serial number of the instrument. This is a read only parameter.

Serial number - Third part of the electronic serial number of the instrument. This is a read only parameter.

WORKING WITH THE RHT CONTROLLER

Multiple output controllers are suited for controlling multiple stage systems. Other applications require OUTPUT 1 to be the control output and OUTPUT 2 to be the alarm. There are eight distinct alarm functions implemented in OUTPUT 2, selected by the parameter

Ac2

Ac2, described below:

Ac2Ac2

2222 - Low alarm – OUTPUT 2 is turned on when the selected variable, as assigned for

OUTPUT 2 in the (nt

3333 - High alarm – OUTPUT 2 is turned on when the selected variable exceeds the

value programmed in SP2

4444 - Inside range alarm – OUTPUT 2 is turned on when the selected variable is within

the range defined by:

5555 - Outside range alarm: OUTPUT 2 is turned on when the selected variable falls

outside the range defined by:

Functions 6666, 7777, 8888 e 9999 are identical to the above ones except that they incorporate the Initial Blocking feature, which inhibits the output if an alarm condition is present at start-up. The alarm will be unblocked after the process reaches a non-alarm condition for the first time.

In a multiple stage application, SP1 creating a progressive sequence for turning on the outputs (compressors or resistances) in response to a system’s demand. The output delays for turning on the compressors (dL1

dL2

dL2) cause the outputs to be turned on one by one, minimizing energy demand.

dL2dL2

Another usage for multiple output controllers is in systems that require both direct and reverse actions (for cooling and heating, simultaneously, for instance). In these applications, one output is configured as reverse action and the other as direct action. The output status leds P1 and P2 in the instrument panel signal the current action being performed.

(nt parameter, falls below the SP2

(nt(nt

SP2.

SP2SP2

(SP1

SP1 – SP2

SP2) and (SP1

SP1SP1

SP2 SP2

(SP1

SP1 – SP2

SP2) and (SP1

SP1SP1

SP2 SP2

SP1 and SP 2

SP2 are configured to operate at different settings,

SP1SP1

SP2SP2

SP2 value.

SP2 SP2

SP1 + SP2

SP2)

SP1SP1

SP2 SP2

SP1 + SP2

SP2)

SP1SP1

SP2 SP2

dL1 and

dL1dL1

CONFIGURATION PROTECTION

A protection system to avoid unwanted changes to the controller parameters is implemented. The level of protection can be selected from partial to full. The following parameters are part of the protection system:

Pas

Pas When this parameter is presented, the correct password should be entered to allow

PasPas

changes of parameters in the following levels.

Prt

Prt Defines the level of parameters that will be password protected:

PrtPrt

1 - Only calibration level is protected (factory configuration); 2 - Calibration and Configuration levels are protected; 3 - All levels are protected - calibration, Configuration and setpoints.

PA(

PA( Parameter for definition of a new password. Since it is located in the calibration level,

PA(PA(

can only be changed by a user that knows the current password. Valid passwords are in the range 1 to 999.

CONFIGURATION PROTECTION USAGE

The P AS

PAS parameter is displayed before entering a protected level. If the correct password is

PASPAS

entered, parameters in all following levels can be changed. If wrong or no password is entered, parameters in the following levels will be read only.

Important notes:

1- After five consecutive attempts to enter a wrong password, new tentative will be blocked for

the next 10 minutes. If the current valid password is unknown, the master password can be used only to define a new password for the controller.

2 - The factory default password is 111.

MASTER PASSWORD

The master password allows user to define a new password for the controller, even if the current password is unknown. The master password is based in the serial number of the controller, and calculated as following:

[ 1 ] + [ highe r di git of SN2 ] + [ higher digi t of SN1 ] + [ higher digit of S N0 ] for example the master password for the device with serial number 987123465 is: 1 9 3 6

as follows: 1 + sn2

How to use the master password:

1- Enter the master password value at P aS 2- Go to PA( 3- Now you can use this new password to access all controller parameters with modify

sn2= 987; sn1

sn2sn2

PA( parameter and enter the new password, which must not be zero (0).

PA(PA(

rights.

sn1= 123; sn0

sn1sn1

sn0= 465 = 1 + 9 + 3 + 6

sn0sn0

PaS prompt.

PaSPaS

ERROR MESSAGES

Sensor measurement errors force the controller outputs to be turned off. The cause for these errors may have origin in a bad connection, sensor defect (cable or element) or system temperature outside the sensor working range. The display signs related to measurement errors are shown below:

Overflow

Underflow

Sensor error

NOVUS N322RHT User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual