TREND HT-S User Manual

Space Humidity and Temperature Sensor

Important: Retain these instructions

Installation Instructions

HT/S

Contents

1 Unpacking .................................................... 1

1 Unpacking

2 Installation

Dimensions

1

86 mm (3.39”)

86 mm (3.39”)

Requirements

2

a

2 Installation .................................................... 1

3 Maintenance ................................................. 4

4 Disposal ....................................................... 4

HT/S Installation
Instructions
TG200990

26 mm (1.02”)

> 50 cm (20”)

b

1.5 m
(5 ft)

c

d

HT/S Space Humidity and Temperature Sensor Installation Instructions TG200990 Issue 1/A 30/01/08

e

f

g

1

HT/S Installation Instructions

H O

2

2 Installation (continued)

Requirements (continued)

2

h

i

j

-5 °C
(23 °F)

0 °C
(32 °F)

+55 °C
(131 °F)

+40 °C measurement
(104 °F)

a

Remove backplate

3

wall box

FR

ABS

b

lk

60 mm (2.36”)

Mount backplate

4

back box
(BESA)

35 mm (1.38”)

wall

0 %RH

100 %RH
non -condensing

35 mm
(1.38”)

35 mm
(1.38”)

35 mm (1.38”)

Remove cutout(s)

5

as required

2

HT/S Space Humidity and Temperature Sensor Installation Instructions TG200990 Issue 1/A 30/01/08

Route cables

6

Installation Instructions HT/S

IQ

2 Installation (continued)

Wire to Controller

7

HT/S

IQ1 & IQ2

2 analogue input channels

TH
TH
I-N
I-P

IN
C
IN
C (+24V)

} temperature
} humidity

linked for thermistor (T)

linked for current (I)

earth (ground) screens at IQ end

IQ3

N+1

temperature

humidity

N

linked for thermistor (T)

linked for current (I)

HT/S/2%

0 (0V)
N+1 (in)

TH
TH
I-N
I-P

+ (+24V)

0 (0V)
N (in)
+ (+24V)

earth (ground) screens at IQ end

IQ1 & IQ2

IN

} temperature

I2N
I1N
I-P

C (+24V)

IN
C (+24V)

} humidity

linked for current (I)

linked for current (I)

earth (ground) screen at IQ end

Note that when connecting to IQ3, in order to provide sufficient supply current to the sensor, the
sensor I-P terminal must be connected to both channels’ 24 V terminals.

0 (0V)
N+1 (in)

I2N
I1N
I-P

+ (+24V)

0 (0V)
N (in)
+ (+24V)

IQ3

N+1

temperature

humidity

N

linked for current (I)

linked for current (I)

Note that in order to maintain the HT/S/2% temperature sensor accuracy, the temperature sensor

earth (ground) screen at IQ end

should only be used if the humidity sensor is also used.

8

backplate

Assemble unit

‘click’

9

Configure IQ

or

IQ

IQ Configuration
Manual 90-1533

HT/S Space Humidity and Temperature Sensor Installation Instructions TG200990 Issue 1/A 30/01/08

3

HT/S Installation Instructions

2 Installation (continued)

10

Set up IQ Sensor types

It is recommended to use SET (software tool) for the setting of sensor type modules. For all IQ2
series controllers with firmware version 2.1 or greater, or IQ3 series controllers, the following SET
Unique Sensor References should be used:

Humidity (HT/S, HT/S/2%): Humidity I
Temperature (HT/S): Thermistor HTST DT (°C)

Thermistor HTST DT F (°F)

Temperature (HT/S/2%): PRT I 0+40 (°C)

Alternatively set scaling mode to 5 (characterise), and enter scaling manually as defined in the

PRT I +32+104 F (°F)

appropriate tables below. Note that for IQ3, scaling mode and exponent do not need to be set up.
For all other IQ controllers see Sensor Scaling Reference Card TB100521A.

Temperature
HT/S (0 to +40 °C, 32 to 104 °F)

stinU

Y

E

U

L

P

xxI)C°(xO)F°(xO

1

2

3

4

5

6

11

C°F°

epyttupnI

3

tnenopxE

05221

reppU

rewoL

5-32

stnioP

6

146.205221

74.304401

64.40368

366.60105

866.7023

201.85-32

Test system

Temperature

I Q

)stlovrotsimreht(1

Temperature
HT/S/2%

(0 to +40 °C, 32 to 104 °F)

C°F°

stinU

Y

E*

U

L

P

xxIxO

1

2

epyttupnI

tnenopxE

reppU

rewoL

stnioP

4023

0204401

)tnerruc(2

3

04401

023

2

Humidity

Δ T

Humidity
HT/S and HT/S/2%

(0 to 100 %RH)

Y epyttupnI)Amrruc(2

E tnenopxE3

U reppU001

L rewoL0

P stnioP2

xxIxO

1 40

2 02001

Δ H

I Q

3 Maintenance

4 Disposal

Over time, the sensing element may become
covered in dust. The dust can be removed
using compressed air. Under no circumstances
should water or cleansing agents be used on the
sensing elements.

Do not dispose of with normal household waste. Do not burn.

Please send any comments about this or any other Trend technical publication to [e-mail]

Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens,
Route du Bois 37,Switzerland by its Authorized Representative, Trend Control Systems Limited.

©Trend Control Systems Limited 2007. Trend Control Systems Limited reserves the right to revise this publication from time to time and
make changes to the content hereof without obligation to notify any person of such revisions or changes.

Trend Control Systems Limited

P.O. Box 34, Horsham, West Sussex, RH12 2YF, UK. Tel:[phone] Fax:[phone] www.trend-controls.com

WEEE Directive :

At the end of their useful life the packaging
and product should be disposed of by a
suitable recycling centre.

Trend Control Systems USA

6670 185th Avenue NE, Redmond, Washington 98052, USA. Tel: [phone], Fax: [phone] www.trend-controls.com

4

HT/S Space Humidity and Temperature Sensor Installation Instructions TG200990 Issue 1/A 30/01/08