Yamatake HTY79 Bedienungsanleitung

AB-5963

Insertion Dewpoint

Temperature / Humidity Sensor

HTY79X3 / HY79X3

General

Insertion dewpoint temperature / humidity sensor

HTY79X3 series uses a Pt100 platinum film temperature

sensing element and a polymer capacitive film humidity

sensing element (FP3 specially developed by Yamatake)

which ensures highly accurate and reliable tempera-

ture/humidity sensing. It is designed to be installed in

return air ducts of commercial buildings, in return air

chambers of air handling units or in ventilated shield for

meteorological instruments. HY79X3 series for sensing

only dewpoint temperature without separate temperature

sensor is also available.

Features

1)Wide sensing range

2)Excellent long term stability

3)Highly resistant to environment

4)Quick response and high repeatability.

5)Easy to install in a duct (bracket prepared)

6)Splash-proof housing (IP54)

Models

Model No. Shape Type Power

supply Humidity

output Temperature

output Fixed Fixed Description

HTY79 Insertion dewpoint temperature sensor (w/separate

temperature sensor)

HY79 Insertion dewpoint temperature sensor

0 Insertion length: Long

1 Insertion length: Short

3―

T Shared 24 V DC, 24 V AC

1 Humidity output 1-5 V

4 Humidity output 4-20 mA

6 Humidity output 0-10 V

0 W/o temperature sensor

P Temperature Pt 100

00―

Specifications/Instructions

▲HTY7903

▲HTY7913

2 AB-5963

Select a model No. from below

HTY7903T1P00 Dewpoint (1-5 V) + temperature (Pt 100) Insertion length: Long

HTY7903T4P00 Dewpoint (4-20 mA) + temperature (Pt 100) Insertion length: Long

HTY7903T6P00 Dewpoint (0-10 V) + temperature (Pt 100) Insertion length: Long

HTY7913T1P00 Dewpoint (1-5 V) + temperature (Pt 100) Insertion length: Short

HTY7913T4P00 Dewpoint (4-20 mA) + temperature (Pt 100) Insertion length: Short

HTY7913T6P00 Dewpoint (0-10 V) + temperature (Pt 100) Insertion length: Short

HY7903T1000 Dewpoint (1-5 V) Insertion length: Long

HY7903T4000 Dewpoint (4-20 mA) Insertion length: Long

HY7903T6000 Dewpoint (0-10 V) Insertion length: Long

HY7913T1000 Dewpoint (1-5 V) Insertion length: Short

HY7913T4000 Dewpoint (4-20 mA) Insertion length: Short

HY7913T6000 Dewpoint (0-10 V) Insertion length: Short

Safety Instructions

Please read instructions carefully and use the product properly. Please keep this instruction on hand for reference at

any time.

Usage Restrictions

This product is targeted for general air conditioning. Do not use this product in a situation where human life may be

affected. If this product is used in clean rooms or places where reliability or control accuracy is particularly required,

please contact Yamatake’s sales representatives. Yamatake Building Systems Co., Ltd. bears no responsibility for

any benefit, or lack of benefit, derived from the operation by the customer.

CAUTION

●Installer must be a trained, experienced service technician.

●Check the ratings given in this instructions to prevent equipment damage.

●Check the environment given in this instructions to prevent equipment damage.

●Disconnect power supply before wiring to prevent electric shock or equipment damage.

●All wiring must comply with local codes and ordinances.

●Use crimp contacts with insulation jackets for wire terminals.

●Do not remove or disassemble casing except for wiring. May result in equipment damage.

●When the product is faulty, the reduced output may result in excessively humid status. Take safety

measures at controller.

3 AB-5963

Specifications

Item Specifications

Temp. –20 to 60 °CMeasurement range Dewpoint –40 to 60 °C DP (–20 to 60 °C)

Temp. 100 Ω/ 0 °COuput signal Dewpoint 1-5 V DC (linear to –40 to 60 °C DP) (output impedance: min. 10 kΩ)

0-10 V DC (linear to –40 to 60 °C DP) (output impedance: min. 10 kΩ)

4-20 mA DC (linear to –40 to 60 °C DP) (maximum permmisible load 300 Ω)

Temp. +/– 0.3 °C (at condtions of –20 to 60 °C)Sensing accuracy Dewpoint +/– 1 °C DP (at condtions of 30 to 90 % RH 25 °C)

+/– 2.5 °C DP (at condtionas of 30 to 90 % RH –5 to 55 °C)

Temp. Max. 4 min.Time constant

(at air velocity 2 m/s) Dewpoint Max. 1 min. (when humidity is constant)

Temp. Rated operaing condtions: –20 to 60 °C 0 to 100 % RH (non-condensing)

Extreme oprating condtions: –20 to 60 °C 0 to 100 % RH (non-condensing)

Storage condtions: –30 to 70 °C 5 to 95 % RH (non-condensing)

Humid. Rated operaing condtions: –5 to 55 °C 10 to 100 % RH (non-condensing)

Extreme oprating condtions: –20 to 60 °C 0 to 100 % RH (non-condensing)

Storage condtions: –30 to 70 °C 5 to 95 % RH (non-condensing)

Environmental conditions

Air velocity Extreme oprating condtions : 0 to 15 m / s

Power supply 24 V AC +10 / –15 % (50/60 Hz), 24 V DC +/– 10 % (only for HTY、HYseries)

Power consumption 0.6 VA (at conditions of 24 V AC, HTY, HY series 1-5 V, 0-10 V output model)

450 mW (at conditions of 24 V DC, HTY, HY series 1-5 V, 0-10 V output model)

1.4 VA (at conditions of 24 V AC, HTY, HY series 4-20 mA output model)

1.2 W (at conditions of 24 V DC, HTY, HY series 4-20 mA output model)

Dielectric strength 500 VAC less than 1 mA of leak for 1 minute

Insulation resistance 500 VDC min. 20 MΩ

Vibration resistance 9.8 m/s² (10 to 150 Hz)

Protection Housing IP54 (when splash-proof connectors and disgnated multi-core calbes are used or when a designated

conduit is used)

Insatllation Duct, air chamber, ventilated case for meteological instruments (with special bracket)

Wiring Terminal block connection

Material Housing: GF20 % Polycarbonate mixed resin, gray (equivalent to DIC-651)

Filter cap: denatured PPE resin, gray (equivalent to DIC-651)

Weight Approx. 240 g (7903 series) Approx. 210 g (7913 series)

Accessories None

Order separatly 83157235-001 Mounting bracket

83157240-004 Conduit mounting set (for HTY, HY series、applicable cable outer diameter11 to 14 φ)

83104098-004 Seal connector (for HTY, HY series、applicable cable outer diameter 10.5 to 14.5 φ)

DY8000A1001 Sensor shield for outdoor

DY3002A1005 ventilated case mounting bracket (L shape metal)

Order separately for

maintenance 83162945-003 Filter set

4 AB-5963

Dimensions (mm)

(1)　7903 series

(2)　7913 series

(3)　Mounting bracket

62.5

25 50 60

6072.3

φ30

3.3

247.6 51.3

45.6 67.3

φ20

110

1135

108.6 51.3

45.6 67.3

φ20

110

1135

5 AB-5963

Installation

Important

1)Select a location where the typical temperature and

humidity of the measured fluid can be sensed and

where the wind speed requirements are met.

2)Make sure that the temperature and humidity elements

are entirely immersed in the measured fluid. Also,

make sure that air can pass over the side of the sensor.

3)Allow adequate service clearance at the front of the

cover.

4)When installing in steam heating air handling unit,

make sure the steam does not directly expose. (It

may exceed the extreme operating condition

5)When inserting the insertion part facing upward,

prevent dew condesation. (The condensated dew will

remain in the fileter cap and measurement difference

will occur until it becomes dried.)

CAUTION

Do not step on the unit.

Mounting 7903 series (duct mounted)

1)Prepare the mounting bracket in advance.

Attach the mounting label at the sensor mounting

position and make a hole in the duct at the point

indicated on the label. Fix the mounting bracket onto

the duct with M4 screws, inserting packing between the

duct and the bracket.

Cover the duct with an insulating material. (If you cover

the duct with an insulating material first, fill the

clearance between the bracket and the duct with the

insulating material after fixing the bracket.)

2)Turn the stopper of the main unit to the left and insert

the main unit into the bracket, aligning the claw to the

bracket groove. Fix it by turning the stopper 45 ° in

the clockwise direction.

Mounting 7913 series (air handling unit

mounted)

1)Prepare the mounting bracket in advance. Attach a

mounting label at the desired mounting position and

make a hole in the air handling unit return air chamber.

Fix the mounting bracket onto the duct with M4 screws

(included) between the duct and the bracket.

2)Turn the stopper of the main unit to the left and insert

the main unit into the bracket, aligning the claw to the

bracket groove. Fix it by turning the stopper 45 °

clockwise.

Duct

Air flow

Duct

Packing

ir flow

Insulating material

Panel

Air flow

Claw

Stopper

45° (2)

(1)

45° (2)

(1)

Claw

Stopper

6 AB-5963

Wiring (common instructions for 7903 series

and 7913 series)

1)Dismount the cover.

(i) Cable connection

Prepare the proper seal connector (order separately) in

advance, if required.

Screw the threaded seal connector into the main and

lead the cable through it.

(ii) Conduit connection

According to the number of cable cores, prepare a

conduit set (order separately) in advance. Fix the

conduit connector and the attachment tentatively with a

screw. Select an O-ring ideal for the cable.

Lead the cable, as shown in the following diagram.

Pull up the cable and fix the attachment to the main unit

with a screw.

Tighten the nut on the conduit at a point where the

conduit lock screw can be tightened easily.

2)Connect the wires to the terminals and close the cover.

Tighten the seal connector. (only when cable

connected)

Terminal Nos. and cable cores

Seal connector

(order separately)

Nut attached to

conduit

Attachment

Conduit connector

(nominal size: 25 mm)

Pull the cable

Tightening direction

Nut attached to conduit

Conduit connector

(nominal size: 25 mm)

Straight box connector

(nominal size: 24-25 mm)

Conduit lock

screw

Attachment

O-ring

Tighten

Allow sufficient

service clearance

～(+)

Pt 100

24 V AC

(24 V DC)

1-5 V DC

0-10 V DC

4-20 mA

HTY7903T1P00

HTY7903T4P00

HTY7903T6P00

HTY7913T1P00

HTY7913T4P00

HTY7913T6P00

(Cable cores:7)

⊥(–)

–

HY7903T1000

HY7903T4000

HY7903T6000

HY7913T1000

HY7913T4000

HY7913T6000

(Cable cores:4)

Power

supply

Dewpoint

Tempe

rature

7 AB-5963

Wiring Instructions

Shielded multi-core cables (CVV-S) of 1.25 mm² or 2

mm² are recommended. Be sure to ground the shielded

cable on the controller side.

If you don't need splashproof, a 1.25 mm² or 2 mm² IV

cable may be used for power and a 1.25 mm² shielded

cable for humidity and temperature signals.

The maximum cable length is 100 m.

Never connect power supply to temperature output.

Always check wiring before supplying power.

Never share 24V AC transformer to other products.

Use of individual AC transformer of humidity

transimitter

CAUTION

Use insulated transformer to supply 24 V AC

power supply voltage.

Never share 24 V AC power supply with other

equipment.

If a transformer is shared with other equipment,

loop will be formed at common and the

sensor/transmitter may be damaged.

•Transformer (24 V AC power supply) shared

•Transformer (24 V AC) separated

•24 V DC power shared

Follow the next instructions to prevent an induction cur-

rent flowing from the humidity sensor to the controller

input circuit, or to prevent an influence on the generating

noise due to inadequate time constant of the controller

input.

•Use a controller with a low pass filter with a removal

ratio of 40 dB or higher (normal mode).

•Connect an isolator to the controller input circuit if a

removal ratio is unknown.

•If you use a Yamatake cotnroller, no problem will

occur.

Maintenance

Since the temperature / humidity sensor have been in-

spected and adjusted accurately before shipment, they

need no adjustment at the site. However, follow the

maintenance instructions below :

1)Periodical inspection

Determine the periodical inspection intervals according

to the amount of suspended dust and other

contaminants in the environment. Regulary check the

sensor’s accuracy and the condition of its cover.

2)Troubleshooting

If any problem occurs during operation, refer to the

following table for appropriate solutions.

No common loop formed

Common loop formed, however, not so

affected by common mode noise.

Good

24 V DC

＋

＋＋

＋

⊥

⊥⊥

⊥

＋

＋＋

＋

－

－－

－

＋

＋＋

＋

－

－－

－

＋

＋＋

＋

－

－－

－

～

～～

～

⊥

⊥⊥

⊥

～

～～

～

＋

＋＋

＋

－

－－

－

－－

－

Temperature / humidity sensor

Common loop formed

Not Good

24 V AC

Multi-loop

controller

Common

＋

＋＋

＋

⊥

⊥⊥

⊥

＋

＋＋

＋

－

－－

－

＋

＋＋

＋

－

－－

－

－－

－

～

～～

～

⊥

⊥⊥

⊥

Temperature / humidity sensor

～

～～

～

－

－－

－

＋

＋＋

＋

Good

24 V AC

＋

＋＋

＋

＋＋

＋

－

－－

－

＋

＋＋

＋

－

－－

－

＋

＋＋

＋

－

－－

－

～

～～

～

⊥

⊥⊥

⊥

24 V AC ～

～～

～

⊥

⊥⊥

⊥ －

－－

－

Multi-loop

controller

Temperature / humidity sensor

Multi-loop

controller

Temperature / humidity sensor

8 AB-5963

Troubleshooting

Problem… Check… Action…

- No output

generated

- Unstable output

- Check loose

connection

- Check Incorrect

wiring

- Check supply voltage

- Check sensor

damage

- Tighten the terminal

brock

- Re-wire

- Replace sensor

- Slow response

- Error in output

- Check the sensor for

water leakage or

condensation

- Check the installed

location

- Check the dust, soil.

- Removetheunit from

bracket.

Dry the unit with no

power.

- Refer tothe

Installation

instructions

- Clean filter

- Replace filter

- Humidity one point

adjustment

- Replace the product

3) Replacing the filter:

(1) Prepare filter set (order separately) in advance.

Remove the filter cap and filter by hand.

(2) Cover the sensor with the new filter and then put

the new filter cap over.

(3) Tighten the filter cap.

4) Humidity one point adjustment

When you find a calibration error in the humidity sen-

sor, re-calibrate the sensor using the adjustment vol-

ume (VR1, VR2) located on the circuit board. The out-

put value is increased by turning this volume in clock-

wise direction and decreased by turning it counter-

clockwise. Use refelenced humidity meter of ade-

quate accuracy. A digital multimeter is recommend-

ed to check the output voltage.

Parts Identification of adjustment volume

Cautions

1. After unpacking, age the transmitter in the ambient

atmosphere for at last 24 hours.

2. To calibrate and adjust, take care the heat from human

body or appliances.

3. When one-point adjustment is done at an environment

where relative humidity is higher than 50 % RH, the

dewpoint temperature accuracy specifications may not

be met to where relative humidity is under 50 % RH.

Yamatake Building Systems Co., Ltd.

Yamatake Corporation

International Business Division

Totate International Bldg.

2-12-19, Shibuya, Shibuya-Ku

Tokyo, 150-8316, Japan

Phone: 81-3-3486-2350

Facsimile: 81-3-3486-2592

Rev. 1.0 Dec. 2000 Printed in Japan. AB-5963 0.5H-H (W)

Specifications are subjects to change without notice.

①

②

Filter cap (The cap will remove

with the filter inside.)

Loosen

Filter cap

Filter

Filter cap

Tighten

Rough adjustment knob (VR2)

Fine adjustment knob (VR1)

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