Yamatake Neosensor HTY7043 User manual

AB-6474
1
Neosensor
Room Temperature/Humidity Sensor
Models
HTY7043, TY7043, TY7053, HY7043
General
Neosensors are electronic room sensors including
temperature sensors (Models TY7043, TY7053), humidity
sensors (Model HY7043) and temperature/humidity
sensors (Model HTY7043). The Neosensors are
coordinated in terms of design and dimension with the
Neostat electric room temperature/humidity controllers.
Room temperature/humidity sensor Model (HTY7043)
uses a Pt100 resistance thermometer sensor (JIS* C1604
Class A) for a temperature sensing element, and a
polymer capacitive humidity sensor (FP3TM specially
developed by Yamatake Corp.) for a humidity sensing
element, enhancing accuracy and reliability of
temperature/humidity sensing. It is suitable for various
applications such as commercial buildings or other indoor
uses.
∗JIS: Japanese Industrial Standards.
Features
1) Wide temperature/humidity sensing range with high
accuracy
2) Excellent long term stability
3) High environmental resistance
4) Quick response and high repeatability
5) Lightweight (thin) and compact.
Specifications/Instructions

2 AB-6474
Safety Instructions
Please read instructions carefully and use the product as specified in this manual. Be sure to keep this manual nearby
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 Yamatake’s sales representatives. Yamatake Corporation will not bear any responsibility for the
results produced by the operators.
CAUTION
•Installation must be performed by qualified personnel in accordance with all applicable safety standards.
•This product must be operated within its operating ranges specified in this manual. Failure to comply will
cause equipment damages.
•Installation must be carried out under the operating conditions specified in this manual to prevent
equipment damages.
•Always disconnect power source before performing any wiring to prevent equipment damages.
•All wiring must comply with local codes of indoor wiring and electric installation rules.
•Do not disassemble the product at any time except when removing the cover to install the product main
unit. Equipment damages may occur.
•Use crimp terminals with insulation for connecting to the external wires.
•When the product is faulty, reduced output may cause over-humidification. Provide safety measure on
the controller side.
•Note that substances contained in gases to be measured, such as corrosive gases and organic solvents,
can cause measurement errors, shortened service life, and malfunctions. If the product is used in non
-standard atmospheric environments, consult with our sales personnel.
•Do not incinerate this product for waste disposal. Do not recycle all or a part of this product, either.
•Dispose of the product as an industrial waste complying with the local regulations.

3 AB-6474
Models Number Configuration
Model
number Shape Type Power supply
Humidity
output
Temperature
output Fixed Output line
Company
logo Description
HTY70 Room temperature/humidity sensor
TY70 Room temperature sensor
HY70 Room humidity sensor
4
Neosensor
5
High Sensitivity Neosensor
3 
T 24 V DC / 24 V AC
Z No power supply required
D 24 V DC
0 Without humidity sensor
1 Humidity output 1 V DC to 5 V DC
4
Humidity output 4 mA DC to 20 mA DC
(2-wire type)
0 Without temperature sensor
4
Temperature output 4 mA DC to 20mA DC
(2-wire type)
P Temperature Pt100
0 
0 Lead wire output
1 Modular jack output
With company logo
-1 Without company logo
Note: Regarding the available model numbers, refer to the table below.
Available model numbers
HTY7043T1P00 With company logo
HTY7043T1P00-1
Humidity (1-5 V DC) +
Temperature (Pt100) Neosensor Without company logo
TY7043Z0P00 With company logo
TY7043Z0P00-1 Temperature (Pt100) Neosensor Without company logo
TY7053Z0P00 With company logo
TY7053Z0P00-1 Temperature (Pt100) High Sensitivity Neosensor Without company logo
TY7043Z0P01 With company logo
TY7043Z0P01-1 Temperature (Pt100) Neosensor with modular jack output Without company logo
HY7043T1000 With company logo
HY7043T1000-1 Humidity (1-5 V DC) Neosensor Without company logo
HTY7043D4400 With company logo
HTY7043D4400-1
Humidity (4-20 mA DC) +
Temperature (4-20 mA DC) Neosensor Without company logo
HY7043D4000 With company logo
HY7043D4000-1 Humidity (4-20 mA DC) Neosensor Without company logo
TY7043D0400 With company logo
TY7043D0400-1 Temperature (4-20 mA DC) Neosensor Without company logo


4 AB-6474
Specifications
Item Specification
Temperature Models HTY7043T and TY70X3Zseries: 0 °C to 60 °C
Models HTY7043D and TY7043Dseries: 0 °C to 50 °C
Measuring range
Humidity 0 %RH to 100 %RH (15 °C to 35 °C)
Temperature Models HTY7043T and TY70X3Z series: 100 Ω / 0 °C
Models HTY7043D and TY7043D series:
4 mA DC to 20 mA DC, 2-wire (linear to 0 °C to 50 °C)
(max. allowable range: 500 Ωor lower)
Output signal
Humidity Models HTY7043T and HY7043T series:
1 V DC to 5 V DC (linear to 0 %RH to 100 %RH)
(10 kΩor higher input impedance of the controller connected)
Models HTY7043D and HY7043D series:
4 mA DC to 20 mA DC, 2-wire (linear to 0 %RH to 100 %RH)
(max. allowable range: 500 Ωor lower)
Temperature Models HTY7043T and TY70X3Z series:
±0.3
°C (in 0 °C to 60 °C)
Models HTY7043D and TY7043D series:
±0.3
°C (15 °C to 35 °C, at 50 %RH)*
±0.5
°C (0 °C to 50 °C, at 50 %RH)*
∗Conditions: 24 V DC input power supply, 250 Ωresistive load, 0.15 m/s wind velocity,
and 60 minute warm-up period
Sensing accuracy
Humidity Models HTY7043T and HY7043T series:
±3 %RH (in 30 %RH to 70 %RH, 25 °C)
±5 %RH (in 20 %RH to 80 %RH, 15 °C to 35 °C)
Models HTY7043D and HY7043D series:
±3 %RH (in 30 %RH to 70 %RH, 25 °C)*
±5 %RH (in 20 %RH to 80 %RH, 15 °C to 35 °C)*
∗Conditions: 24 V DC input power supply, 250 Ωresistive load, 0.15 m/s wind velocity,
and 60 minute warm-up period
Temperature Neosensor: 4.5 minutes or less
High Sensitivity Neosensor: 2.5 minutes or less (Reference values)
Time constant
(for wind velocity of
0.15 m/s) Humidity Neosensor: 40 seconds or less
Temperature Rated operating conditions
Models HTY7043T and TY70X3Z series:
0
°C to 60 °C, 0 %RH to 100 %RH (non-condensing)
Models HTY7043D and TY7043D series:
0
°C to 50 °C, 0 %RH to 100 %RH (non-condensing)
Extreme operating conditions: -10 °C to 60 °C, 0 %RH to 100 %RH (non-condensing)
Transport/storage conditions: -20 °C to 70 °C, 5 %RH to 95 %RH (non-condensing)
Environmental
conditions
Humidity Rated operating conditions: 15
°C to 35 °C, 20 %RH to 80 %RH (non-condensing)
Extreme operating conditions: -10 °C to 60 °C, 0 %RH to 100 %RH (non-condensing)
Transport/storage conditions: -20 °C to 70 °C, 5 %RH to 95 %RH (non-condensing)
Power supply voltage Models HTY7043T and HY7043T series: 24 V AC +10/-15 % (50 Hz/60 Hz), 24 V DC ±10 %
Models HTY7043D, HY7043D, and TY7043D series: 24 V DC ±10 %
Power consumption 0.15 VA for 24 V AC (Models HTY7043T and HY7043T series with 1 V DC to 5 V DC output)
100 mW for 24 V DC (Models HTY7043T and HY7043T series with 1 V DC to 5 V DC output)
550 mW for 24 V DC (Models HTY7043D, HY7043D, and TY7043D series)*
∗For 1 pt of 4 mA DC to 20 mA DC output.

5 AB-6474
Specifications
Item Specification
Withstand voltage 500 V AC for 1 mA or less leakage current per 1 minute
Insulation resistance 500 V DC, 20 MΩor higher
Installation With the mounting kits (separate order required) specified below
Connection Lead wire (300 mm long, 0.75 mm² cross section)
Modular jack connector (only for Model TY7043Z0P01)
Materials Cover: PC resin, pale gray (JPMA (Japan Paint Manufacturers Association): BN-85 (2003 edition))
Base: modified PPE resin, pale gray (JPMA: BN-85 (2003 edition))
Weight Models HTY7043T, HY7043T, and TY7043Z series: Approx. 80 g
Models HTY7043D, HY7043D, and TY7043D series: Approx. 110 g
Accessories 4 mounting screws for Neosensor main unit (M3 ×16)
Dedicated mounting kits
and auxiliary devices
(separate order required)
The Neosensors can be used in combination with mounting kits and auxiliary devices that require separate
order.
Dedicated mounting kit:
Wall-direct mounting kit (Part No. 83165803-001)
Thermoplate mounting kit (Part No. 83165803-011)
Multi-Thermocase mounting kit (Part No. 83165803-021)
Auxiliary devices:
Thermoplate for individual room control
Models QY1100C, QY1100D (with rotary switch)
Thermoplate
Model DY2000A1022 (1-unit lengthwise mounting)
Model DY2000A1023 (1-unit crosswise mounting)
Model DY2000A2023 (2-unit crosswise mounting; with outlet box)
Model DY2000A2024 (2-unit crosswise mounting; with switch box)
Model DY2000A3022 (3-unit crosswise mounting)
Conduit connection type Thermoplate
Model DY2000A1021 (1-unit square mounting)*
Model DY2000A2021 (2-unit crosswise mounting)*
Model DY2000A3021 (3-unit crosswise mounting)*
∗Used for open wiring
Multi-Thermocase
Model TY1100Z (only for Models HTY7043T, HY7043T, and TY70X3Z series)
Mounting Kits for Each Mounting Method
Mounting method Mounting kit Composition
Mounting directly
on a wall
Mounting onto
conduit connection
type Thermoplate
Wall-direct mounting kit
(Part No. 83165803-001)
Mounting onto
Thermoplate
Thermoplate mounting kit
(Part No. 83165803-011)
Mounting in
Multi-thermocase
Multi-Thermocase mounting kit
(Part No. 83165803-021)
* Mounting screws are included in Multi-Thermocase (separate order required).
1 mounting plate
Accesory: 2 pan-head machine
screws (M4 x 8)
Main part: 1 Wall-direct
mounting kit
Accessory: 1 flat-head
machine screw (M3 x 16)
Main part: 1 Thermoplate
mounting kit
Accesory: 2 tapping screws
(M2.6 x 8)
Main part: 1 Multi-Thermocase
mountin
g
kit

6 AB-6474
Dimensions (mm)
1) Dimensions of Neosensor main unit with Wall-direct mounting kit
(Neosensor)
(High Sensitivity Neosensor)
(Surface view of mounting plate)
Figure 1. Dimensions (mm): Wall-direct mounting
(77)
(77)
16.5
38.5
Wall-direct
mounting kit
90
77
77
90
(77)
77
90
Wall-direct
mounting kit 45.5
16.5
77
90
(77)
15
15
80
Mounting screw
(M3)
φ4.2 mounting hole
Mounting
hole
66.7*
80
Note: When mounting the Neosensor, be sure to
secure a longer than 15 mm clearance for
wiring from the mounting surface inside the
wall.
Note: When mounting the Neosensor, be
sure to secure a longer than 15 mm
clearance for wiring from the
mounting surface inside the wall.
8.2
4.2
∗ Use JIS outlet box/box cover (JIS C8340 (1999)).
Mounting dimension: 66.7 mm
Mounting
surface
Mounting
surface

7 AB-6474
Thermoplate
(separate order
required)
77 41
77
(77)
12.5
19
Thermoplate
mounting kit
(77)
Mounting
surface
2) Dimensions of Neosensor main unit with Thermoplate mounting kit
(Neosensor)
(High Sensitivity Neosensor)
(Surface view of Thermoplate mounting kit)
Figure 2. Dimensions (mm): Thermoplate mounting
Note: When mounting the Neostat, be sure
to secure a longer than 12.5 mm
clearance for wiring from the
mounting surface inside the wall.
77 48
77
(77)
12.5
19
Thermoplate mounting kit
(77)
Mounting
surface
Note: When mounting the Neostat, be sure
to secure a longer than 12.5 mm
clearance for wiring from the
mounting surface inside the wall.
φ2.8 mounting hole 8
49
22

8 AB-6474
3) Dimensions of Neosensor main unit (with the cover removed*) with Multi-thermocase mounting kit
(Surface view of Multi-Thermocase mounting kit)
Figure 3. Dimensions (mm): Multi-Thermocase mounting
Multi-Thermocase mounting kit
(85)
23
(72.8)
52
∗Assembled dimension of device mounting
plate of Multi-Thermocase and
Multi-Thermocase mounting kit:
66.7 mm
(72.8)
85
72.8
72.8
85
68
55
φ3.4 mounting hole
66.7*
∗When multiple units of Neosensor (and/or Neostat) are
installed in a Multi-Thermocase (separate order
required), the Neosensor main unit covers are not
used.

9 AB-6474
Installation
Installation requirements
1) Mount Neosensor on a wall approx. 1.5 m high above the floor, where the average temperature and humidity can be
measured.
2) Avoid locations where room air circulation is not interfered by furniture or a door, and where heat from office automation
equipment stays on.
3) Avoid locations affected by draft, downdraft, hot/cold air from pipes/ducts, and radiant heat from the sun.
∗ The ambient air velocity in the Neosensor installation area should be between 0.1 and 0.2 m/s.
4) Choose an installation location with no vibration.
5) Do not install Neosensor where water may drop.
6) Do not allow dew condensation on Neosensor.
7) Do not install Neosensor directly on the wall without Wall-direct mounting kit.
8) Note that the output values for Models HTY7043DXXXX, HY7043DXXXX and TY7043DXXXX (2-wire 4-20 mA output
type) may vary depending on Neosensor installation environments, including temperature, humidity and air velocity.
Please consult with Yamatake's service personnel in charge regarding the installation.
Installation procedure: Neosensor directly on a wall (See Fig. 4.)
1) Attach the mounting plate to the box cover (outlet box mounting dimension: 66.7 mm (JIS C8340:1999)) located inside
the wall.
2) Install the main part of the Wall-direct mounting kit on the mounting plate. (See Fig. 9.)
3) Connect the output lead wires of the Neosensor main unit to the external wires (for the load side). (See Figs. 15 and 16)
4) Remove the cover from the Neosensor main unit, and mount the main unit on the main part of the Wall-direct mounting
kit with the 4 main-unit accessory screws (M3 ×16). When mounting the main unit onto the Wall-direct mounting kit,
make sure to set the height-adjusting levers on the left and right sides (See Fig. 12.) to the upper positions (indicated by
"L").
5) Place the cover back on the Neosensor main unit to complete the installation procedure. (See Fig. 8.)
Figure 4. Installation: Neosensor with Wall-direct mounting kit
66.7㎜
Wall-direct mounting kit
(separate order required) Mounting-box cover
JIS C8340
with 66.7-mm
mounting dimension
(commercially available)
Neosensor
Accessory screws
(2 pan-head machine screws, M4 ×8)
Accessory screws
(1 flat-head machine screw,
M3 ×16)
Mounting plate
Main part of Wall-direct mounting kit
External wires
(for the load side)
Output lead wires
Accessory screws
(4 flat-head machine
screws, M3 ×16)
Main unit of Neosensor
Cover

10 AB-6474
Installation procedure: Neosensor on conduit connection type Thermoplate (See Fig. 5.)
1) Attach the mounting plate to the conduit connection type Thermoplate.
2) Install the main part of Wall-direct mounting kit on the mounting plate. (See Fig. 9.)
3) Connect the output lead wires of the Neosensor main unit to the external wires (for the load side). (See Figs. 15 and 16.)
4) Remove the cover from the Neosensor main unit, and mount the main unit on the Wall-direct mounting kit with the 4
main-unit accessory screws (M3 ×16). When mounting the main unit onto the Wall-direct mounting kit, make sure to set
the height-adjusting levers on the left and right sides (See Fig. 12.) to the upper position (indicated by "L").
5) Reinstall the cover to the main unit to complete the installation procedure. (See Fig. 8)
Figure 5. Installation: Neosensor with Wall-direct mounting kit (on conduit connection type Thermoplate)
66.7㎜
Accessory screws
(4 flat-head machine
screws, M3 ×16)
External wires
(for the load side)
Wall-direct mounting kit
(separate order required)
Wire-pipe connection
(open-wiring) type
Thermoplate
(separate order required)
Neosensor
Main unit of Neosensor
Cover
Accessory screws
(2 pan-head machine screws, M4 ×8)
Accessory screws
(1 flat-head machine screw,
M3 ×16)
Mounting plate
Main part of Wall-direct mounting kit
Output lead wires

11 AB-6474
Installation procedure: Neosensor on Thermoplate (See Fig. 6.)
1) Attach the mounting plate supplied with Thermoplate to the mounting box cover (switch box mounting dimension:
83.5 mm (JIS C8340:1999)) located inside the wall.
2) Mount Thermoplate on the mounting plate.
3) Install the main part of the Thermoplate mounting kit on Thermoplate.
4) Connect the output lead wires of the Neosensor main unit to the external wires (for the load side). (See Figs. 15 and 16.)
5) Remove the cover from the Neosensor main unit, and mount the main unit on the main part of the Thermoplate mounting
kit with the 4 main-unit accessory screws (M3 ×16). When mounting the main unit onto the Thermoplate mounting kit,
make sure to set the height-adjusting levers on the left and right sides (See Fig. 12) to the upper position (indicated by
"L").
6) Place the cover back on the Neosensor main unit to complete the installation procedure. (See Fig. 8.)
Figure 6. Installation: Neosensor with Thermoplate mounting kit (on Thermoplate)
Output lead wires
Thermoplate
mounting kit
(separate order required)
Thermoplate
(separate order required)
Mounting-box cover
JIS C8340
with 83.5-mm
mounting dimension
(commercially available)
Neosensor
Mounting plate
Main part of Thermoplate mounting kit
Accessory screws
(4 flat-head machine
screws, M3 ×16)
Accessory screws
(2 pan-head machine screws,
M4 ×5)
Accessory screws
(2 tapping screws, M2.6 ×8)
Main unit of Neosensor
Accessory screws
(2 pan-head machine screws, M4 ×8)
Thermoplate
Cover
External wires
(for the load side)

12 AB-6474
Installation procedure : Neosensor in Multi-Thermocase (See Fig. 7.)
1) Attach the main part of the Multi-Thermocase mounting kit to the device-mounting plate of Multi-Thermocase.
2) Connect the output lead wires of the Neosensor main unit to the external wires (for the load side).
3) Remove the cover from the Neosensor main unit, and set the height-adjusting levers on the left and right sides to the
lower position (indicated by "H"). Then, mount the main unit on the Multi-Thermocase mounting kit with the 4 main-unit
accessory screws (M3 ×16). Neosensor installed in the Multi-Thermocase is used with the cover removed.
IMPORTANT:
When installing Neosensor in the Multi-Thermocase, be sure to set the height-adjusting levers on the
left and right sides of the Neosensor main unit to the lower position (indicated by "H").
Figure 7. Installation: Neosensor (in Multi-Thermocase) with Multi-Thermocase mounting kit
Note: To mount the Neosensor main unit, set the height-adjusting lever on the left and right sides to the lower position
before fixing the main unit on the Multi-Thermocase mounting kit with the 4 main unit accessory screws.
Device-mounting plate
of Multi-Thermocase
Device-mounting plate
of Multi-Thermocase
Height-adjusting levers
(set to the lower
positions)
Main part of
Multi-Thermocase
mounting kit
Accessory (Multi-Thermocase):
2 pan-head machine screws
(M3 ×6)
Main unit of Neosensor
Accessory: 4 flat-head
machine screws (M3 ×16)
Multi-Thermocase
Multi-Thermocase
mounting kit
(separate order required)
Neosensor
External wires
(for the load side)

13 AB-6474
CAUTION
•Do not bend the humidity sensing element
attached to the printed circuit board
assembly, as sending accuracy may drop.
Removing and installaing the cover
• Removing the cover
Remove the cover by pressing the spring, using a thin
stick, located inside the top section of the Neostat main
unit.
• Installing the cover
Insert the two cover tabs into the two mounting holes
located at the bottom of the main unit and fix the cover
in place with the spring located at the top of the main
unit.
Figure 8. Removing/installing the cover
Installing the main part of Wall-direct mounting kit
Figure 9. Installing the main part of Wall-direct mounting kit
Measures against disturbance (including heat
radiation and conductivity) caused by the mounting
wall
Against disturbance from the mounting wall, position
(height) of the sensing element can be changed in
accordance with the following procedure.
1) Remove the Neosensor mounting screws (4 screws).
Figure 10. Removing the mounting screws
2) Pull up the Neosensor main unit from the Wall-direct
mounting kit (Max. 9 mm).
Figure 11. Pulling up the Neosensor main unit
3) Lower the height-adjusting levers on the left and right.
∗ The height-adjusting levers are set to the upper position
(indicated by "L") for factory preset.
Figure 12. Height-adjusting lever
4) Mount and fix the Neosensor main unit ont the main
part of the Wall-direct mounting kit with the 4 mounting
screws.
Figure 13. Neosensor mounting on the Wall-direct mounting kit
5) Installation is completed with the Neosensor raised.
(Fig.14)
∗The effect of the measures against disturbance will depend on
the environment.
Figure 14. Neosensor with its main unit raised
∗Follow the same procedure to install the Neosensor on the
Thermoplate.
Pressing the spring
Main part of
Wall-direct
mounting kit
Cover
Wall surface
Main part of Wall-direct mounting kit
Mounting plate
38.5 47.5
Main part of Wall-direct
mounting kit
Neostat main unit
Neosensor
main unit
Height-adjusting lever
(set to upper position
(indicated by "L") )
Height-adjusting lever
(Lower position
(indicated by "H") )
Neosensor
main unit
4 mounting screws
Mounting plate tabs
(
at 2 locations
)
L
H
L
H
Cover tabs
(at 2 locations)
Rear side
9 (Protrusion)
Mountin
g
screws
Wall surface
Main part of
Wall-direct mounting kit
Main part of
Wall-direct mounting kit

14 AB-6474
Wiring
Figure 15. Wiring diagram
Figure 16. Modular jack connection
(Model TY7043Z0P01 only)
Precautions for Wiring
Shielded multi-core cables (JIS CVV-S) of 1.25 mm² or
greater for power supply line and for
temperature/humidity output line are recommended.
1.25 mm² JIS IV cable can be used for power line and for
temperature output line as well. Be sure to ground the
shielded cable on the controller side.
The maximum cable length is 100 m.
CAUTION
•Never connect power supply to temperature
output to prevent smoking. Always check
wiring before supplying power.
•Never share 24 V AC transformer with any
other product.
Figure 17. Wiring diagram
* Black lines for power supply and for humidity output are
connected inside the Neosensor.
Model
HY7043T1000
Model
TY7043Z0P00
Model
TY7053Z0P00
~(+)
Pt100
Brown
Black
Blue
Black
Red
White
White
A
B
B
24 V AC
(24 V DC)
1-5 V DC
J1
<
<
<
<
<
<
<
<
1 (A)
2 (B)
3 (A)
4 (B)
5 NC
6 (B)
7 NC
8 (B)
Model TY7043Z0P01
(Modular jack output)
Model
HTY7043T1P00
Power
supply ⊥(-)
+
-
Pt100
Humidity
Tem-
perature
Humidity
Temperature
H–
T–
T+
H+
Controller
24 V DC
power supply
Model RYY792D
24 V DC
power supply
Model RYY792D
- + - +
24 V DC
0 V
24 V DC
0 V
Controller
Blue
Black
Red
White
Model HTY7043D4400
Model HY7043D4000
Model HTY7043D4400
Model TY7043D0400

15 AB-6474
Never share AC transformer of humidity sensor.
CAUTION
•Use insulated transformer to supply 24 V AC
power supply voltage. Never share 24 V AC
power supply with any other equipment. If a
transformer is shared, loop will be formed at
common and the sensor may be damaged.
Shared transformer (24 V AC power supply)
Figure 18. Shared transformer
Separate transformer (24 V AC power supply)
24 V DCpower shared
(Model HTY7043TXXXX/HY7043TXXXX)
Figure 19. Separate transformers
Follow the next instructions to prevent an induction
current flowing from the humidity sensor to the controller
input circuit, or to prevent an influence of the generating
noise due to inadequate time constant of the controller.
•Use a controller with a low pass filter (removal ratio of
40dB or higher in normal mode) for receiving signals.
•Connect an isolator for the controller input circuit if a
removal ratio is not enough.
•No problem will occur for connecting with a
Yamatake’s controller.
DC power supply can be shared.
(Though loop is formed at common,
common mode noise affects a little.
)
Correct
24 V DC
Temperature/humidity sensor
Temperature/humidity sensor
Multi-loop
controller
＋
＋＋
＋
⊥
⊥⊥
⊥
－
－－
－
+
－
－－
－
～
～～
～
⊥
⊥⊥
⊥
～
～～
～
+
－
－－
－
+
+
－
－－
－
－
－－
－
Multi-loop
controller
The transmitter will
short through common
if transformer wiring is
incorrect.
Incorrect
Shared
common
line
24 V AC
＋
＋＋
＋
⊥
⊥⊥
⊥
＋
＋＋
＋
－
－－
－
＋
＋＋
＋
－
－－
－
＋
＋＋
＋ ～
～～
～
⊥
⊥⊥
⊥
Temperature/humidity sensor
～
～～
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24 V AC
Temperature/humidity sensor
Temperature/humidity sensor
Multi-loop
controller
Shared
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Correct
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Temperature/humidity sensor
Temperature/humidity sensor
Multi-loop
controller

16 AB-6474
Maintenance
Since the temperature/humidity sensor is inspected and
calibrated for high accuracy at the factory before
shipment, no field calibration is necessary. Follow the
maintenance instructions below.
1) Periodic inspection
Determine the frequency of periodic inspection
depending on the amount of suspended dust and
other contaminants in the environment. Regulary
check the sensing accuracy and clean the cover.
2) 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
•Re-perform wiring.
•Replace sensor.
•Slow response to
output
•Moisture/conden-
sation on the
sensor
•Remove cover.
•Dry power-off
state sensor in
clean air
seasoning.
•Error in output •Installed location
•Dust and
contamination on
the sensor
•Refer to
‘Installation
requirements’.
•Clean the cover.
•Perform humidity
single-point
calibration.
•Replace the
sensor.
3) Humidity single-point calibration (Models HTY7043T,
HY7043T)
When you find an output error of the humidity sensor,
the sensor can be calibrated with the adjustment
knobs,VR1 for rough adjustment, VR2 for fine
adjustment, located inside the humidity sensor. The
output value is increased by turning these knobs
clockwise and decreased by turning them
counterclockwise.
Use a reliable measuring instrument for humidity
single-point calibration with correct procedure in
appropriate environment. A digital multimeter is
recommended to check the output voltage.
Fig. 20 Adjustment knobs arrangement on the circuit board
Cautions
1. Leave the unpacked sensor in the ambient
atmosphere for approx. 24 hours.
2. Be sure not to affect the sensor with heat generation
from human body and/or appliances during the sensor
calibration.
Building Systems Company
Tamachi Kiyota Building
4-3-4, Shibaura
Minato-ku, Tokyo 108-0023
http://www.yamatake.com
Rev. 2.1 Apr. 2005 AB-6474 0.5H-H (W00)
(J: AI-6474 Rev. 2.1)
Fine adjustment knob (VR1)
Temperature sensing
element
Humidity sensing element
Rough adjustment knob (VR2)
Specifications are subject to change without notice.
16