Azbil HTY7903T User manual

AB-5963
1
Specifications/Instructions
Insertion Dewpoint Temperature Sensor
Model HTY79X3T (with Separate Temperature Sensor),
Model HY79X3T
General
Insertion dewpoint temperature sensor Model HTY79X3T
series uses a Pt100 resistant thermometer sensor (JIS*
C1604 Class A, equivalent to IEC60751: 95 Class A) for a
temperature sensing element, and a polymer capative
humidity sensor (FP3™specially developed by Azbil
Corporation ) for a dewpoint temperature sensing element,
enhancing accuracy and reliability of temperature sensing. It
is suitable for various applications such as a duct or chamber
for building air conditioning and outdoor air measurement, as
well as industrial applications. Model HY79X3 series (for
dewpoint temperature sensing without temperature sensor)
is also available.
∗JIS: Japanese Industrial Standards
Features
•Wide dewpoint temperature sensing range with high
accuracy.
•Highly environmental resistance.
•Excellent long term stability.
•Quick response and high repeatability.
•Easy installation in a duct/chamber with the quick
detachable bracket (dedicated).
•Dust-proof and splash-proof housing (IP54).
•CE Marking certified product:
Models HTY79X3T and HY79X3T conform to all the
applicable standards of CE Marking.
Model HTY7903T
Model HTY7913T

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Safety Instructions
Please read instructions carefully and use the product as specified in this manual. Be sure to keep this manual near by for ready
reference.
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 a clean room or a place where reliability or control accuracy is particularly required, please contact Azbil
Corporation’s sales representative. Azbil Corporation will not bear any responsibility for the results produced by the operators.
WARNING
•Do not disassemble the product. Disassembly may result in electrical shock or equipment damage.
CAUTION
•Installation and wiring must be performed by qualified personnel in accordance with all applicable safety
standards.
•This product must be operated under the operating conditions (power, temperature, humidity, vibration, shock,
installation position, atmospheric condition, etc) specified in this manual to prevent equipment damages.
•This product must be operated within its rated operating ranges specified in this manual. Failure to comply will
cause equipment damages.
•All wiring must comply with local codes of indoor wiring and electric installation rules.
•This product does not have a power switch. Be sure to install a power circuit breaker for the power source.
•Lightning protection based on the regional characteristics and the building structure is necessary to minimize
lightning damages to the product.
•Always disconnect power source before performing any wiring to prevent equipment damages.
•Use crimp terminal lugs with insulation for electric wires to be connected to the product screw terminals.
•Make sure all the wires are tightly connected to prevent heat generation or equipment malfunction. Insufficient
tightening of the screw terminals also can cause inaccurate measurement.
•Leave vacant terminals unconnected to prevent product damage.
•Do not step on the product. External force can damage the product.
•If more than the rated power supply voltage is applied, product replacement is required for safety.
•Do not use two-away radio or any wireless device within 3 m radius of the product. It may lower the product
sensing accuracy.
•Carefully press the rubber packing. Personal injury can be caused when your fingers holding the tool slip.
•Dispose of this product as an industrial waste in accordance with your local regulations. Do not reuse all or part of
this product.
IMPORTANT:
•When the product is faulty, reduced output may cause over-humidification. Provide safety measure for the
controller in connection.
•Product sensing accuracy is preset before shipment. Output of the product, used even in normal air, may be
shifted depending on the operating conditions. Periodic inspection therefore may be required.
•Corrosive gas or organic solvent may damage the product or shift the product output. Before using the product
in abnormal atmosphere, consult with Azbil Corporation’s sales personnel.
Trademark information:
FP3 is a trademark of Azbil Corporation in Japan or in other countries.

AB-5963
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Model Numbers
Base model
number Shape Type Power supply
Humidity
output
Temperature
output Fixed Description
HTY79 Insertion dewpoint temperature sensor
(with separate temperature sensor)
HY79 Insertion dewpoint temperature sensor
0 Insertion length: Long
1 Insertion length: Short
3 ⎯
T 24 V DC / 24 V AC
1 Dewpoint temperature output: 1-5 V
4 Dewpoint temperature output: 4-20 mA
6 Dewpoint temperature output: 0-10 V
0 Without temperature sensor
P Temperature: Pt100
00 ⎯
Select a model number from below.
Model number Description Insertion length
HTY7903T1P00 Dewpoint temperature (1-5 V) + temperature (Pt100) Long
HTY7903T4P00 Dewpoint temperature (4-20 mA) + temperature (Pt100) Long
HTY7903T6P00 Dewpoint temperature (0-10 V) + temperature (Pt100) Long
HTY7913T1P00 Dewpoint temperature (1-5 V) + temperature (Pt100) Short
HTY7913T4P00 Dewpoint temperature (4-20 mA) + temperature (Pt100) Short
HTY7913T6P00 Dewpoint temperature (0-10 V) + temperature (Pt100) Short
HY7903T1000 Dewpoint temperature (1-5 V) Long
HY7903T4000 Dewpoint temperature (4-20 mA) Long
HY7903T6000 Dewpoint temperature (0-10 V) Long
HY7913T1000 Dewpoint temperature (1-5 V) Short
HY7913T4000 Dewpoint temperature (4-20 mA) Short
HY7913T6000 Dewpoint temperature (0-10 V) Short

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Specifications
Item Specification
Temperature -20 °C to 60 °CMeasurement range
Dewpoint temperature -40 °C to 60 °C DP (-20 °C to 60 °C) (non-condensing)
Temperature 100 Ω/ 0 °C
Models HTY79X3T1, HY79X3T1 series:
1 V DC to 5 V DC (linear to -40 °C to 60 °C DP)
(Input impedance of the controller connected: 10 kΩor higher)
Models HTY79X3T4, HY79X3T4 series:
4 mA DC to 20 mA DC (linear to -40 °C to 60 °C DP)
(Maximum allowable load: 300 Ωor lower)
Output signal
Dewpoint temperature
Models HTY79X3T6, HY79X3T6 series:
0 V DC to10 V DC (linear to -40 °C to 60 °C DP)
(Input impedance of the controller connected: 10 kΩor higher)
Temperature ±0.3 °C (at -20 °C to 60 °C) (Pt100 element)Sensing accuracy
Dewpoint temperature ±1 °C DP (at 30 %RH to 90 %RH, 25 °C)
±2.5 °C DP (at 30 %RH to 90 %RH, -5 °C to 60 °C)
Temperature 4 min. or lessTime constant
(at 2 m/s air velocity) Dewpoint temperature 1 min. or less (at constant temperature)
Rated/extreme operating conditions Transport/storage conditions
Temperature
range
-20 °C to 60 °C -30 °C to 70 °CTemperature
measuring
Humidity
range
0 %RH to 100 %RH
(non-condensing)
5 %RH to 95 %RH
(non-condensing)
Temperature
range
-20 °C to 60 °C -30 °C to 70 °C
Environmental
conditions
Dewpoint temperature
measuring
Humidity
range
Rated: 10 %RH to 100 %RH
Extreme: 0 %RH to 100 %RH
(non-condensing)
5 %RH to 95 %RH
(non-condensing)
Vibration 4.9 m/s2(10 Hz to 150 Hz) 9.8 m/s2(10 Hz to 150 Hz)
(in packaged form)
Air velocity Extreme: 0 m/s to 15 m/s ⎯
Power supply voltage 24 V AC +10/-15 % (50 Hz/60 Hz), 24 V DC ±10 %
Power consumption Models HTY79X3T1, HY79X3T1 series with 1-5 V output:
Models HTY79X3T4, HY79X3T4 series with 4-20 mA output:
Models HTY79X3T6, HY79X3T6 series with 0-10 V output:
0.7 VA for 24 V AC / 600 mW for 24 V DC
1.4 VA for 24 V AC / 1200 mW for 24 V DC
0.7 VA for 24 V AC / 600 mW for 24 V DC
Withstand voltage 1 mA or less leakage current at 500 V AC for 1 minute (between the housing and terminals)
Insulation resistance 500 V DC, 20 MΩor higher (between the housing and terminals)
Enclosure rating Housing: IP54 (dust-proof and splash-proof with specified water-proof gland and multi-core cables used or with
specified conduit connected.)
Installation Duct, chamber, thermometer shelter (with dedicated bracket)
Connection Terminal block connection
Material, color Housing: 20 % GF containing polycarbonate resin, gray
Filter cap: Modified PPE resin, gray
Weight Models HTY7903, HY7903 series: Approx. 250 g
Models HTY7913, HY7913 series: Approx. 220 g
Accessories None
Parts (separate order
required)
Part No. 83157235-001:
Part No. 83157240-004:
Part No. 83104098-004:
Part No. DY8000A1001:
Part No. DY3002A1005:
Mounting bracket (packing, indicator label for installation holes, M4 screws)
Conduit mounting set (cable with φ11 mm to φ14 mm outer diameter is applicable.)
Seal connector (cable with φ10.5 mm to φ14.5 mm outer diameter is applicable.)
Sensor shield for outdoor
Mounting bracket for thermometer shelter (L-type bracket)
Replacement part
(separate order
required)
Part No. 83162945-003: Filter set (filter, filter cap)
CE Marking Conformity
This product complies with the following Electromagnetic Compatibility (EMC).
EMC: EN61326-1 Class B, Table 1 (For use in a basic electromagnetic environment)

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Dimensions
Models HTY7903, HY7903 series
Models HTY7913, HY7913 series
Mounting bracket Part No. 83157235-001
Figure 1. Dimensions (mm)
70
247.6
A
A
51.3
45.6 67.3
113.5
110
φ20
70
108.6 51.3
45.6 67.3
113.5
110
φ20
φ
30
25
50
60
62.5
72.3
40
60
3.3

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Installation
Installation requirements
•Select a location where the typical temperature and
humidity of the measured gas can be sensed with the
wind speed specified.
•Make sure that the entire probe is immersed in the
measured gas. Also, make sure that airflow passes
perpendicular to the side of the probe.
•Leave adequate maintenance clearance in front of the
housing cover.
•When installing in steam-heating AHU, make sure the
probe is not directly exposed to the high-temperature
steam that exceeds the probe allowable operating
condition.
•When installing the probe pointing upward, do not allow
dew condensation on the probe. Otherwise, dew
condensation stays on the grooves of the filter cap,
causing measuring error (until it gets dried.).
CAUTION
•Do not step on the product. External force can
damage the product.
Installing Models HTY7903, HY7903 series
(for general AHU duct insertion)
1) Prepare the dedicated mounting bracket.
Attach the indicator label for mounting hole at the probe
mounting position, and make a mounting hole on the
duct.
Figure 2. Indicator label on the duct
2) Fix the mounting bracket onto the duct with M4 screws
(supplied with the bracket), inserting packing between
the duct and the bracket. (The side with longer
protruding part needs to face outward. See Fig. 3.)
Figure 3. Mounting bracket on the duct
3) Cover the duct with an insulating material. (If the duct is
already covered with it, partially remove the insulating
material for the bracket. Then, fill the clearance between
the bracket and the duct with the insulating material after
fixing the bracket.)
Figure 4. Duct and the mounting bracket
covered with insulating material
4) Turn the main unit stopper 45 degrees (from ‘a’ to ‘b’
shown in Fig. 5) to unlock, and insert the probe of the
main unit into the bracket as the main unit claws and the
bracket slits match.
Figure 5. Mounting the main unit on the duct
(with the mounting bracket)
5) Completely insert the probe into the duct. Then, fix the
probe and the bracket by turning the stopper 45 degrees
(from ‘b’ to ‘a’ shown in Fig. 6) to lock.
Figure 6. Fixing the main unit on the duct
(with the mounting bracket)
A
ir flow
Duct
Indicator label
A
ir flow
Duct
Packing
Mounting
bracket
A
ir flow
Insulating
material
Stopper
Claw
Main unit of
Model HTY7903/
Model HY7903
ab
45°
b a

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Wiring port
Seal connector
(with separate order required)
Installing Models HTY7913, HY7913 series
(for equipment, including chamber and thermometer
shelter, insertion)
1) Prepare the dedicated mounting bracket. Attach the
indicator label for mounting hole at the probe mounting
position, and make a mounting hole on the equipment
panel.
Figure 7. Indicator label on the panel
2) Fix the mounting bracket onto the equipment panel with
M4 screws (supplied with the bracket). (The side with
shorter protruding part needs to face outward. See Fig.
8.)
Figure 8. Mounting bracket on the panel
3) Turn the main unit stopper 45 degrees (from ‘a’ to ‘b’
shown in Fig. 9) to unlock, and insert the probe of the
main unit into the bracket as the main unit claws and the
bracket slits match.
Figure 9. Mounting the main unit on the panel
(with the mounting bracket)
4) Completely insert the probe into the panel. Then, fix the
probe and the bracket by turning the stopper 45 degrees
(from ‘b’ to ‘a’ shown in Fig. 10) to lock.
Figure 10. Fixing the main unit on the panel
(with the mounting bracket)
Wiring (common to Models HTY7903/HY7903 and
HTY7913/HY7913 series)
Wiring procedure
1) Open the front cover by pressing the claw of the case.
(See ‘a’ in Fig. 11.) At this time, open 30 degree wide or
wider. (See ‘b’ in Fig. 11.) Then lift the front cover to
detach. (See ‘c’ in Fig. 11.)
Figure 11. Detaching the front cover
2) Lead the cable through the wiring port.
Seal connector connection
Prepare the appropriate seal connector (with separate
order required), depending on the quantity of core cables.
Screw the threaded seal connector onto the wiring port
and lead the cables through the port.
Figure 12. Seal connector connection
Mounting
bracket
Panel
Side view
Stopper
Claw
Main unit of
Model HTY7913/
Model HY7913
a b
45°
Indicator label Panel
b a
a. Press.
Claw
b. Open.
c. Detach.

AB-5963
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O-ring
A
ttachment
Conduit fixing screws
Conduit nut
Conduit connector
(DN 25)
Straight box connector
(DN 24 - DN 25)
a. Pull.
b. Seal the wiring port.
Conduit connection
Prepare the appropriate conduit set (with separate order
required), depending on the quantity of core cables.
Temporarily screw the conduit connector and the
attachment, and select an O-ring appropriate for the
cable.
Figure 13. Conduit connection (1/2)
Lead the cable in, as shown in Fig. 14. Pull up the cable
(‘a’ in Fig. 14) and screw the attachment onto the wiring
port. Tighten the conduit nut on the conduit at a position
where the conduit set screw can be tightened easily.
Then, seal the wiring port (‘b’ in Fig. 14).
Figure 14. Conduit connection (2/2)
3) Connect the cables to the terminals.
Connect the core cables to the terminals, and attach the
front cover.
Figure 15. Attaching the front cover
Then, tighten the seal connector (for seal connector
connection).
Figure 16. Tightening the seal connector
Figure 17. Connection of 7- and 4-core cables to terminals
CAUTION

•Make sure all the wires are tightly connected to
prevent heat generation or equipment
malfunction. Insufficient tightening of the screw
terminals also can cause inaccurate
measurement.
•Leave vacant terminals unconnected to prevent
product damage.
IMPORTANT:
Do not remove the terminal cover except when
connecting or disconnecting the wires. When
removing the terminal cover, make sure that the
wires are not electrified before connecting/
disconnecting wires. After the connection/
disconnection, be sure to attach the terminal cover
again.
4) After completing wiring, be sure to attach the front cover.
A
ttachment Conduit nut
Conduit connector
(DN 25)
Tighten.
Models
HTY7903T1P00
HTY7903T4P00
HTY7903T6P00
HTY7913T1P00
HTY7913T4P00
HTY7913T6P00
(7-core cable)
Models
HY7903T1000
HY7903T4000
HY7903T6000
HY7913T1000
HY7913T4000
HY7913T6000
(4-core cable)
24 V AC
24 V DC
1-5 V DC
0-10 V DC
4-20 mA
Pt 100
(+)
(-)
+
-
A
B
B
Power
supply
Dewpoint
temperature
Temperature
1
2
3
4
5
6
7
∼
⊥

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Wiring requirements
•Shielded multi-core cables (JCS* CVV-S cables) of
1.25 mm² or 2 mm² are recommended for power line and
dewpoint temperature output line. Be sure to ground the
shielded cable for the controller.
•Without dust-proof or splash-proof enclosure, a
1.25 mm² or 2 mm² cable (JIS IV cable) can be used for
power line and temperature output line, and a 1.25 mm²
shielded cable for dewpoint temperature output line.
The maximum cable length is 100 m.
•Never connect power to temperature output terminal to
prevent smoking.
•Always check wiring before supplying power.
Never share 24 V AC transformer with other products.
∗JCS: Japanese Electric Wire & Cable Makers’
Association Standards
Never share AC transformer for Model HY79/HTY79 with
any other equipment.
CAUTION

•Use insulated transformer to supply 24 V AC
power. Never share 24 V AC power supply
with other equipment. If a transformer is
shared, loop will be formed at common and
the sensor may be damaged.
24 V AC Transformer shared with two sensors
∗Fig. 18 shows wiring example of Model HY79X3T.
Figure 18. Incorrect wiring: shared 24 V AC transformer
Separate 24 V AC transformers for two sensors
∗Fig. 19 shows wiring example of Model HY79X3T.
Figure 19. Correct wiring: separate 24 V AC transformers
24 V DC Transformer shared with two sensors
∗Fig. 20 shows wiring example of Model HY78X3T.
∗For connecting terminals [-] and [E] (3 and 2), use power with
0.022 μF or lower capacitive coupling.
Figure 20. Correct wiring: shared 24 V DC transformer
Follow the below instructions to prevent an induction current
flowing from the dewpoint temperature sensor to the
controller input circuit, or to prevent noise from generating
due to inadequate time constant of the controller input.
•Use a controller with a low pass filter (40 dB or higher
removal ratio in normal mode) for receiving signals.
•Connect an isolator to the controller input circuit if a
removal ratio is not enough.
•No problem will occur for connecting with the controllers
provided by Azbil Corporation.
IMPORTANT:
•Select the power for this product based on the
allowable load (max. current and max. power
consumption).
•Note that 4-20 mA output type is not applicable to
Model RYY792D converter.
A
loop is formed at
common.
Incorrect
Dewpoint temperature
sensor
24 V AC
Controller
Shared
Common line
∼
Dewpoint temperature
sensor
+
∼
+
+ +
⊥- -
--
⊥
Correct
24 V AC ∼
24 V AC
Controlle
r
∼
+ +
++
- -
- -
⊥
⊥
No loop is formed
at common.
Dewpoint temperature
sensor
Dewpoint temperature
sensor
Though a loop is formed at
common, common mode noise
affects little.
Correct
24 V DC
Controller
∼
+
∼
+
+ +
⊥
- -
--
⊥
+
-
Dewpoint temperature
sensor
Dewpoint temperature
sensor
0.022
μ
F or lower

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Maintenance
Since the dewpoint temperature sensor is inspected and
calibrated for high accuracy at the factory before shipment,
no field calibration is necessary. Follow the maintenance
instructions below:
Periodic inspection
Periodically inspect the sensor for its sensing accuracy and
clean the cover. Set the period between inspections based
on atmospheric dust and other contaminants in the
installation environment.
Troubleshooting
If any problem occurs during operation, refer to the following
table for appropriate solutions.
Troubleshooting and solution
Problems Check items Solutions
•No output
generated
•Unstable
output
•Loose wiring
•Disconnected wiring
•Power supply
voltage
•Sensor damages
•Tighten the terminal
block.
•Re-perform wiring.
•Replace the sensor.
•Slow
response to
output
•Moisture/
condensation
on the sensor
•Detach the main unit
from the bracket, and
remove the filter cap
and the filter.
Dry power-off state
sensor in clean air
seasoning.
•Error in
output
•Installed location
•Dust and
contamination on
the sensor
•Refer to the
‘Installation
requirements’.
•Clean the filter.
•Replace the filter.
•Perform dewpoint
single-point calibration.
•Replace the sensor.
Filter replacement:
CAUTION
•Installation must be performed by qualified
personnel in accordance with all applicable
safety standards.
IMPORTANT:
Be sure not to touch the print board or other parts
when they are not covered by the filter cap or the
filter.
1) Prepare the new filter set (with separate order required)
to replace with. Remove the old filter cap and filter (to
replace) by hand.
Figure 21. Filter cap removal
2) Before attaching the new filter, check that the rubber
packing sealing the sensing element is not raised from
the probe, as shown in Fig. 22.
Figure 22. Rubber packing position
For rubber packing raised, press it using a slotted
screwdriver as shown in Fig. 23.
Carefully handle the tool so as not to damage the
packing or other part of the product.
Figure 23. Pressing rubber packing
CAUTION
•Carefully press the rubber packing. Personal
injury may result when your fingers holding the
tool slip.
Filter cap
(removed with the filter
inside the cap.)
Loosen.
Rubber packing:
not raised from the probe to
completely seal the element.
Rubber packing:
raised from the probe.
Sensing element may not
completely be sealed.
Sensing
element
Sensing
element
Press rubber packing using a
tool such as a slotted
screwdriver so that the raised
packing is placed back in
position.
Press