Dwyer Instruments HT Series Manuale utente

BULLETIN E-90-HT

SERIES HT RH/Temperature Transmitter

Specifications – Installation and Operating Instructions

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, ,U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com

Lit-By Fax: 888/891-4963

DESCRIPTION

Monitor and control relative humidity and temperature in

building energy management systems with the Series HT

Humidity Temperature Transmitter. Designed for demanding

HVAC/EMCS applications, the Series HT provides ±3% RH

accuracy and ±1% stability per year. Routine calibration is

not required with the fully interchangeable sensor. Two-wire

connections allow easy installation directly into air ducts or

within a controlled area.

INSTALLATION

Mounting

The duct mount models must be mounted as described

below:

1. Drill four 1/8(3.2 mm) diameter holes for the mounting

screws in the locations shown in Figure 1.

2. Cut a 0.866(22 mm) diameter hole in the duct for the

sensor in the location shown in Figure 1.

3. Attach the duct mounting bracket to the duct with the

four screws provided.

4. Slide the sensor/transmitter assembly through the

center hole in the mounting bracket and secure into

place by tightening the screw located on the side of the

raised square portion of the mounting bracket.

Reminder: Remove the yellow sensor protection cap

beforeinstalling the sensor into your duct.

PHYSICAL DATA

Relative Humidity Range: 10 to 90% RH.

Temperature Range: Duct mount: -40 to 140˚F (-40 to 60˚C), wall

mount: 23 to 131˚F (-5 to 55˚C).

Accuracy: ±3% RH @ 25˚C; ±0.3˚C @ 25˚C.

Stability: ±2% RH over 2 years.

RH Temperature Dependence: <±1.5% RH from 14 to 140˚ (-10

to 60˚C).

Temperature Dependence: 0.01˚C/˚C.

Temperature Sensor: Pt 1000ΩRTD.

Response Time: 15 seconds.

Output Signal: 4 to 20 mA.

Supply Voltage: 10 to 28 VDC.

Current Consumption: 4 mA minimum.

Operating Humidity Range: Duct mount: 0 to 100%, wall mount:

0 to 90%.

Operating Temperature Range: Duct mount: 14 to 140˚F (-10 to

60˚C), wall mount: 23 to 131˚F (-5 to 55˚C).

Storage Temperature Range: -40 to 140˚F (-40 to 60˚C).

Conduit Connection:

 NPT.

Mounting Connection:

 NPT.

Housing Material: ABS plastic.

Enclosure: Duct mount only/IP65.

Weight: 0.6 lb (0.3 kg).

3-5/32

[80.17]

3-5/32

[80.17]

1-1/2

[38.10]

19/32 DIA.

[15.09]

15/32 DIA.

[11.91]

11-5/8 [295.3]

8-1/2 [215.9] 2-1/8

[53.98]

SERIES HT RH/TEMPERATURE TRANSMITTERS

*Wall mount not shown

Model Description

Number

HT00* Humidity Transmitter, wall mount

HT01 Humidity Transmitter, duct mount

HT10* Humidity/Temp Transmitter, wall mount

HT11 Humidity/Temp Transmitter, duct mount

Accessories

No. HT5, Replacement Humidity Sensor

No. HT6, Replacement Pt1000ΩRTD

1.65

[42]

1.65

[42]

Ø 0.866 [22] min

Ø.125 [3.2]

Tapping Screw

DIN 7981

FIGURE 1: Drilling Dimensions for Duct Mount Units

*Duct Mount unit shown.

REPLACEMENT SENSORS

Series HT Temperature/Humidity Transmitters incorporate

fully interchangeable humidity and temperature sensors.

These transmitters do not require recalibration when the

sensor is changed.

In duct mount models, the sensors are located beneath the

filter membrane in the tip of the duct probe. Simply

unscrew the filter membrane and remove the sensor.

In wall mount models, the sensors are located on the circuit

board. Gently unsnap the light gray front casing from the

back portion of the housing and replace the sensor.

MAINTENANCE/REPAIR

No routine maintenance is required on the Series HT

RH/Temperature Transmitter. These units are not field

repairable and should be returned to the factory if service is

required. After first obtaining a Returned Goods

Authorization (RGA) number, send the unit, freight prepaid

to the following address. Please include a clear description

of the problem plus any application information available.

Dwyer Instruments, INC.

Attn: Repair Department

102 Indiana Highway 212

Michigan City, IN 46360

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, ,U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com

Lit-By Fax: 888/891-4963

+RH

-RH

POWER

SUPPLY

10...28VDC

4-20mA

-T

POWER

SUPPLY

10...28VDC

4-20mA

+RH

-RH

POWER

SUPPLY

10...28VDC

4-20mA

Figure 2: Wiring Diagram for HT00 & HT01

Figure 3: Wiring Diagram for HT10 & HT11

Wire the humidity and temperature transmitters models

HT01 and HT11 as shown in Figure 3.

Installing the Cable Seal (Duct mount units only)

Included with the duct mount models HT01 and HT11 is a

rubber cable seal. This seal helps provide a dust and water

tight housing and ensures environmental protection per

IP65. Install the cable seal as described below:

1. Press the rubber seal into the conduit hole located on

the side of the housing.

2. Pierce the center of the seal with a cable or a

screwdriver.

3. Pull the cable through the hole in the center of the seal.

Designed for cable diameters 7...10 mm.

Electrical Connections

The Series HT RH/Humidity Transmitter is a true 2-wire, 4-

20 mA current output device. Electrical connections are

made to screw terminals located beneath the light gray

front casing. For duct mount units, remove the 4 screws

located on the front face of the housing. For wall mount

units, gently unsnap the light gray front casing from the

back portion of the housing.

Wire the humidity transmitters models HT00 and HT01 as

shown in Figure 2.

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