Azbil RHS301R0 User manual

Thank you for purchasing the RH Sensor.
This manual contains information for ensuring correct
use of the RH Sensor. It also provides necessary
information for installation, maintenance, and
troubleshooting.
This manual should be read by those who design and
maintain devices that use the RH Sensor.
Be sure to keep this manual nearby for handy
reference.
Please read the "Terms and Conditions" from the
following URL before ordering or use:
http://www.azbil.com/products/bi/order.html
Check the following items when removing the RH sensor
from its package:
If there is some problem with your order, please contact your
dealer immediately.
RHS301R0
●Main body
●Accessories
• Baseplate
• Mounting bracket
• 1 set of mounting screws
• Instructions (this document)
RHS302R0
●Main body
●Accessories
• Membrane filter (81403424-001), 1 set
• Cable gland
• 1 set of mounting screws
• Sticker for determining hole positions
• Instructions (this document)
1. Overview
The RHS series features highly accurate and reliable
relative humidity detectors that use the latest polymer
humidity sensor for superior detection, response and
reproducibility. Each RH detector have a built-in
temperature sensor, enabling it to simultaneously
measure temperature and caluculate relative humidity.
Mesurements are output as a 1 to 5 Vdc or 4 to 20 mAdc
output signal.
CP-UM-1263E
RHS301R0, RHS302R0
RH Sensor
Relative humidity and temperature detectors
User's Manual
1
Be sure that the user receives this manual before the
product is used.
Copying or duplicating this user’s manual in part or in
whole is forbidden. The information and specifications
in this manual are subject to change without notice.
Considerable effort has been made to ensure that this
manual is free from inaccuracies and omissions. If you
should find an error or omission, please contact the
azbil Group.
In no event is Azbil Corporation liable to anyone for any
indirect, special or consequential damages as a result
of using this product.
2008-2012 Azbil Corporation All Rights Reserved.
NOTICE
Safety precautions are intended to ensure the safe and
correct use of this product, to prevent injury to the
operator and others, and to prevent damage to
property. Be sure to observe these safety precautions,
and be sure to read and understand the contents of this
manual.
SAFETY PRECAUTIONS
CAUTION
Cautions are indicated when mishandling this
product might result in minor injury to the user,
or only physical damage to the product.
UNPACKING
•Wire the RH sensor according to the instructions
herein, using the specified type of wire and wiring
methods.
Failure to do so could cause fire or device failure.
•Use this device within the specified operating
conditions for temperature, humidity, voltage,
vibration, shock, atmosphere, etc.
Failure to do so could cause fire or device failure.
•For the RHS302R0, be sure to use the included
cable gland or, if rainproof installation is needed,
obtain a waterproof cable gland and seal well.
Failure to do so could cause fire or device failure.
CAUTION
Model No. Prefix Type Options Specifications
RHS Relative humidity sensor
301R0 Indoor wall-mount
302R0 Insertion (duct) mount
00 Standard
D0 With inspection data
Y1 ISO compliant
Y2 Traceability validation

3. Wiring
■Cautions for wiring
●Suitable cable
•Signal wire
- Use a twisted shielded pair
- Recommended type:
Hitachi Cable, Ltd.,
JKPEV-S-0.9 mm2or equivalent (2 pairs)
•Power cable
- 600 V vinyl-insulated cable (JIS C3307 or equivalent)
- Conductor diameter 0.5 to 1.25 mm
- Outside diameter 2.0 to 3.2 mm
●Terminal block
• Suitable wire size: 0.5 to 1.5 mm2
• Recommended screwdriver tip size: 2.5 mm wide ×
0.35 mm thick
■Inductive interference and noise
suppression
•Do not bundle the output signal wires together with
commercial power cables or run them together in the
same conduit. Keep the output signal wires at least 50
cm away from commercial power cables.
•If necessary, mount a filter or surge absorber on motors
and other noise-emitting equipment. A filter is effective
for a fast rising surge, and a varistor is effective for a
pulse surge with a high crest.
■Wiring check and confirmation
Before use, make sure there are no mistakes in
the wiring.
■Mounting method
●RHS301R0
1. Procure a junction box cover with a circular hole (JIS
C8340) as shown in (1) of the figure.
2. After mounting the junction box cover (1), attach in order
the mounting bracket (2), base plate (3), base (4) and
cover (5) using the provided screws.
2. Mounting
■Location
Mount the detector in a location meeting the following
criteria:
•Operating ambient temperature:
-5 to +55 °C
-20 to +80 °C for the sensor part of the RHS302R0
•Operating ambient humidity:
10 to 90 % RH (without condensation) for the case
0 to 100 % RH (without condensation) for the sensor
•Vibration and shock:
None
•Sunlight and heat:
Avoid direct sunlight, radiant heat, etc.
•Atmosphere:
No flammable, corrosive, or explosive gases. No
conditions that would be harmful to humans.
Wind speed:
Humidity can be measured at wind speeds up to 5
m/s. If the wind speed is higher, attach the sintered
metallic filter (81403426-001, 133 µm) to the
RHS302R0 duct-mount detector. This will allow
measurement up to 20 m/s.
•Dust:
No dust or tobacco smoke
•Electrical noise:
Keep as far away as possible from high-power
electromagnetic switches, equipment emitting strong
high-frequency radio waves, SCR units, etc.
2
●RHS302R0
1. Affix the drilling dimensions sticker to the mounting
surface and drill the specified holes.
2. Insert the probe into the hole and tighten the 2 provided
screws firmly.
Note: Make sure to use the screws for mounting.
(5) Cover
Spring clasp
(2) Mounting bracket (1) Juction box cover with circular hole
screw centers 66.7 (JISC8340)
Base mounting
screw
66.7
(3) Base plate(4) Base
Note: Make sure the RHS301 cover is securely attached to its base and held in place by the spring clasp.
When removing the cover, press down on the spring clasp through the ventilation hole at the top of
the indicator unit, and gently pull the cover off.
DRILLING DIMENSIONS
M4 Tapping screw
(3.5 Hole)
M4 Tapping screw
( 3.5 Hole)
13 Hole
4141
41 41
Sticker for determining
hole position RHS302R0 Correct Incorrect

3
4. Maintenance and Calibration
Obtain an accurate humidity measuring instrument to
use for calibration. Compare the humidity reading of the
RH sensor with that of the instrument used for
calibration.
If the difference exceeds the accuracy specification of
the RHS, return it to Azbil Corporation for calibration.
Generally we recommend calibration once per year, but
the frequency of calibration depends upon the operating
conditions. At first, try calibrating 2 or 3 times per year,
and determine the optimum calibration frequency on the
basis of your experience.
Cautions for calibration
The presence of a person near the RH sensor may cause
the temperature and humidity to vary. Keep away from
the RH sensor when taking measurements. If that is not
possible, keep your body as far away as possible, and
come near the device with your hand only.
Room temperature and humidity may vary, for example
between the south and north sides of the room. Measure
at points that are typical for the whole room.
Because the humidity sensor has a fast response, output
variations may be caused by the wind. We recommend
filtering the output, for example by having the receiving
instrument take a moving average.
Terminal connection
Indoor wall-mount type: Model No. RHS301R0
AC/DC adoptor
WN790A101 1to5V
1to5V
Power
Temperature
Humidity
GND
Note: the sym ol indicates the input of a controller or recorder, etc.
Inlet 12 dia.
46
32
GND
Humidity Temperature
Power
Duct mount type: Model No. RHS302R0
AC/DC adaptor
WN790A105
4to20mA
4to20mA
Temperature
Humidity
Humidity Temperature
Note: the symbol i dicates the i put of a co troller or recorder, etc.
Unit: mm
5. Specifications
Model number RHS301R0 RHS302R0
Mounting Indoor wall-mount Insertion mounting
Sensor Humidity Polymer (thin polymer film)
Temperature Platinum resistance temperature detector (JIS Pt100 Ω)
Measuring range Humidity 0 to 100 % RH (without condensation)
Temperature 0 to 50 °C -20 to +80 °C
Accuracy Humidity +/-2 % RH: 0 to 90 % RH, +/-3 % RH: 90 to 100 % RH (at 20 °C)
Temperature +/-0.2 °C (at 20 °C)
Hysteresis Humidity 1 % RH or less
Temperature 0.1 °C or less
Humidity drift / temperature +/-0.04 % RH/°C
Humidity response time 10 s (for 90 % response) 20 s (for 90 % response)
Output Humidity 1 to 5 Vdc linear Allowable load resistance: 4 to 20 mAdc Allowable load resistance:
Temperature 1 to 5 Vdc linear 10 kΩmin. 4 to 20 mAdc 500 Ωmax.
Operating temperature -5 to +55 °C -5 to +55 °C (case)
-20 to +80 °C (sensor part)
Storage temperature -40 to +55 °C
Rated power voltage 12 Vdc 24 Vdc
Operating power voltage 11 to 15 Vdc 20 to 30 Vdc
Power consumption 120 mW or less 800 mW or less
Insulation resistance 50 MΩmin. between each terminals and case with 50 Vdc Megger
Dielectric strength 1500 Vac, 1 min. between power terminals and case
Vibration resistance 4.9 m/s2or less (10-60 Hz)
Impact resistance 490 m/s2or less
Case material ABS resin Die-cast aluminum (Probe: stainless steel)
Construction Indoor use Dustproof and splash-proof construction: IP55
(case)
Case color Pail-beige Gray
Mass 120 g 590 g
Accessories Baseplate, Mounting bracket, Membrane filter (81403424-001): 1 set,
1 set of mounting screws, Cable gland, 1 set of mounting screws,
Instructions (this document) Sticker for determining hole positions,
Instructions (this document)
Optional parts (sold separately) AC/DC adaptor: WN790A101 AC/DC adaptor: WN790A105
Sintered metallic filter: 81403426-001,
133 µm (for dustproof and windproof)

6. External dimensions
4
●RHS301R0
Main body
View of terminal block (without cover)
Humidity Temperature
GND Power
Hole for wiring
Humidity senor chip
Temperature sensor chip
0
811
20
50
71
41
Cover
Base
Baseplate
Mounting
bracket
0
Baseplate (accessory)
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Mounting bracket (accessory)
Hole for M4 mounting bracket mounting screws
(accessory)
M3 thread for mounting baseplate
M3 thread for mounting base
Hole for mounting bracket fixing
UP
8
43
7.1
4.5
9.8 .7
8
.5
1. mm thick cold-rolled
steel plate with chromate
treatment
M3 thread for mounting baseplate
●RHS302R0
Main body
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Unit: mm
Specifications are subject to change without notice. (09)
1-12-2 Kawana, Fujisawa
Kanagawa 251-8522 Japan
URL: http://www.azbil.com 1st edition: Feb. 2008
2nd edition: Apr. 2012 (M)