Novus RHT-Air User manual

NOVUS AUTOMATION 1/9
RHT-Air
WIRELESS DEVICE
FOR TEMPERATURE AND
HUMIDITY
INSTRUCTIONS MANUAL V1.0x F
FCC
This device has been tested and complies with the parameters for a Class A digital device, pursuant to Part 15 of the FCC Rules. Such limits are
designed to provide reasonable protection against harmful interference when the device is operated in a commercial environment. This device
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions in this manual, may
cause harmful interference to radio communications.
Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the device.
RF Exposure: It is necessary to keep 20 cm between the antenna and the user and the transmitter module cannot be co-located with any other
transmitter or antenna.
Canada
This Class A device complies with Canadian standard ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
ANATEL
This device is homologated by ANATEL, in accordance with the procedures regulated by Resolution 242/2000, and meets the technical
requirements applied.
This device is operated in a secondary fashion, that is, it is not entitled to protection against harmful interference, even from the same type of
stations, and it cannot cause interference to systems operating on a primary basis.
For more information, see the ANATEL website www.anatel.gov.br.

NOVUS AUTOMATION 2/9
1INTRODUCTION
RHT-Air comes with a high precision and stability sensor to measure both
temperature and relative humidity. Because it operates with a
microprocessor, it can be fully configured through its USB and IEEE 802.15.4
interfaces, using Modbus RTU commands. The software DigiConfig enables
for all the device’s resources to be configured.
RHT-Air can be configured to display the temperature and Relative Humidity
measured or even, the temperature and the Dew Point
RHT-Air should be connected (via wireless) to an AirGate-Modbus so that
its registers can be read whenever it is in operation.
Two models are available. See device label for identification:
•RHT-Air: Operates from internal battery or external power supply;
•RHT-Air NB: Operates from external power supply only.
1.1 IDENTIFICATION
The following elements appear in the front part of the device:
Fig. 1 – RHT-Air main screen
Communication Indicator (COM): It signals that the device is receiving data
from the Modbus network.
Button (Programming): This button is used to configure the Modbus
address, the Update Interval and screen changes.
Temperature: Room temperature measured by the device.
Relative Humidity: Relative Humidity measurement.
Fig. 2 – RHT-Air’s second screen
Communication Address: Programmed value to identify the Modbus
network device. Programmable between
1
and
246
.
2SPECIFICATIONS
Device’s operating
temperature RTH-Air: from -10 °C to 70 °C
Electromagnetic
compatibility
EMC: EN61326-1:2006 CISPR11/EN55011,
EN61000-4-2, EN61000-4-3, EN61000-4-4,
EN61000-4-6, EN61000-4-8
Sensor’s
measurement range
Temperature: -40.0 °C to 100.0 °C.
Relative Humidity (RH): 0.0 to 100.0 % RH.
(No Condensation)
Dew point: -40.0 °C and 100.0 °C
Precision of
measurements
See Fig. 3.
Note: measurement errors can be discarded
through the software’s OFFSET parameter.
Resolution of
measurements:
Temperature: 0.1 °C. 14 bits (16383 levels)
Relative Humidity (RH): 0.1 %. 12 bits (4095
levels)
Response time
(Sensor)
Temperature: Up to 30 s in slow moving air.
Humidity: Up to 8 s in softly moving air (20 to
80 % RH).
Interval between
updates
A minimum of 15 seconds. No more than 30
minutes (1800 s)
Power supply
12 Vdc to 30 Vdc, consumption < 100 mA or
optional internal Lithium battery 3.6 Vdc 1/2
AA battery.
Connections
•Internal USB Device (Mini-
B) for
configuration and firmware update.
•
Groove RP SMA (Plug) connector for
antenna.
•Power supply connector.
Wireless
•Maximum transmission power of 25,11
mW (14 dBm).
•Maximum Range: 500 meters line-of-sight
in open field.
•Receptor sensibility - 92 dBm.
•Operation band ISM 2.4 GHz.
•DSSS Technology -
Direct Sequence
Spread Spectrum.
•OQPSK Modulation - Offset Quadrature
Phase Shift Keying.
•15 operation channels.
•AES-CBC-
128 (Advanced Encryption
Standard).
Storage Polycarbonate
Level of protection
The device is suitable for applications that
require a level of protection of up to IP65.
Electronic module box: IP65; Sensor capsule:
IP40.
Dimensions 60 x 70 x 35 mm + antenna 105 mm + sensor
37.2 mm
Weight 171 grams / 40 grams (cable)
DigiConfig software
configuration
environment
Configuration software Windows®.
Menus in portuguese, english or spanish.
Certifications
ANATEL (0172-13-7089), FCC

NOVUS AUTOMATION 3/9
2.1 PRECISION OF MEASUREMENTS AND OPERATIONAL LIMITS OF SENSORS:
Fig. 3 - Precision of the humidity and temperature measurement
3MECHANICAL INSTALLATION
RHT-Air was designed to be attached to walls. By removing the device’s
cover, users will have access to two molding holes of the base, as shown in
Fig. 4. The device should be attached with the sensor capsule facing
downwards in order to ensure precision and the specified level or
protection.
Fig. 4 - RHT-Air mounting holes and measures
Fig. 5 - RHT-Air Measurements
4CONFIGURATION
4.1 CONFIGURATION VIA USB INTERFACE
Initially, the first configuration must be done through USB interface.
•Remove the four set screws of the front panel of the device RHT-Air,
taking the necessary precaution not to apply force on the internal connector
of the electronic circuit.
•In order to configure it through a USB interface, connect the cable as
shown below. The external power cord should not be used during the
configuration.
5ELECTRICAL INSTALLATION
5.1 EXTERNAL POWER SUPPLY CONNECTION
Fig. 6 below shows RHT-Air’s necessary electrical connection. Terminals
1 and 2 are to be used in the electrical connection and terminals 3 and 4
are not used.
1
- VDC
Power Supply
Black wire
2
+ VDC
Power Supply
White Wire
3
Not used
Blue wire
4
Not used
Brown Wire
Disconnect the power supply while the device is opened.

RHT-Air
NOVUS AUTOMATION 4/9
Fig. 6 - Electrical wiring
M8 4-pin female power supply cable.
For replacement,
consult commercial department.
•RHT-Air is supplied from factory with the jumper (J1) set in the position
“EXT” for external power supply.
•RHT-Air NB can only operate from external power supply and J1 is not
available.
5.1.1 RECOMMENDATIONS FOR INSTALLATION
•Conductors of small electric signals must be separated from activation
conductors or higher current or power in the system’s plan, if possible in
grounded electroducts.
•The instrument’s supply must come from a network proper for
instrumentation.
•In control and monitoring applications, it is essential to consider what
may happen when any part of the system fails.
•The use of RC FILTERS (47 Ωand 100 nF, series) in parallel with
contactor and solenoid coils, etc. is recommended.
5.2 BATTERY POWER SUPPLY
RHT-Air can be supplied by an internal battery whenever the device is not
energized by the electrical grid. Below are guidelines on how to proceed for
supplying power with a battery.
RHT-Air NB can only operate from external power supply:
•Remove the four set screws of the front panel of the device RHT-Air,
taking the necessary precaution not to apply force on the internal connector
of the electronic circuit.
•After removing the front panel, change the position of the jumper (J1) to
“BAT” so that it can be supplied through the battery. Replace the front
panel, by placing the four set screws, taking the necessary precaution
not to apply force on the internal connector of the electronic circuit.
•RHT-Air NB has not battery option.
5.2.1 REPLACING THE INTERNAL BATTERY
It is possible to check the battery’s charge through register “29”. A fully charged
battery typically has a power above 3.6 V. As you use the RHT-Air, the power
of the battery will gradually decrease. It is recommended that you check the
value of registry “29" regularly so that when it reaches below 3.3 V, the battery
can be replaced.
Note: Even when the power is below 100 %, the device will operate
normally.
Only suitable replacement battery for this device is:
MANUFACTURER: OMNICELL
MODEL: ER14250HD
•Remove the four set screws of the front panel, taking the necessary
precaution not to apply force on the internal connector of the electronic
circuit. After removing the front panel, replace the battery, taking the
necessary precaution not to touch the electronic circuit.
•Insert a new battery and replace the front panel carefully, placing the
four molding screws.
6CONFIGURATION / OPERATION
The application DigiConfig is a Windows® software used for configuring
RHT-Air. In order to install it, please run the file “DigiConfigSetup.exe” from
the CD that comes with the device and follow the instructions therein.
DigiConfig comes with an unabridged help tutorial, containing all the
necessary information for you to use it. If you want to use help tutorial, start
the application and select the "Help” menu or press "F1".
Check our website for get the DigiConfig installer and the additional manual
guides.
Users will receive the fully calibrated adjustment-free device. The original
configuration is shown below:
Addr
(Communication address) = 246

RHT-Air
NOVUS AUTOMATION 5/9
Time
(Update interval) = 60
In order to configure it for the first time, it is necessary to remove the front cover
and connect it to a computer through a mini-B USB cable. The initial
configurations for wireless are described as follows:
PAN ID (Network Identifier) = 22350 (0x574E)
RF Power (Power Level) = 0 dBm
6.1 RHT-Air SCREENS
Indication screen of the values measured in the device:
1st Screen: Main
In order to configure the communication parameters, you should press the
Button (for about 5 seconds) until it starts to blink, release it and press
it again to expand it. When the expected value appears, release the button
and wait until the screen stops blinking (for about 10 seconds). If you want to
move on to the following screens, press the button .
Configuration screen of the Modbus Address – Sets the address of the
module on the Modbus network. Between 1 and 246.
2nd Screen: Modbus address
Time configuration screen – Sets the update interval.
3rd Screen: Update interval
Mode’s configuration screen – Sets the indication mode.
4th Screen: Indication mode
Configuration screens of the Unit: It sets which temperature unit should be
used (ºC or ºF).
5th Screen: Unit
Screens for viewing the values measured in the device only:
6th Screen: Temperature
7th Screen: Relative Humidity
8th Screen: Dew point
7BATTERY LIFE
The battery is estimated to last for over a year. There is a fine line between its
life and how the device is used. The lower the sensor’s reading interval, the
shorter it will last, as it may, in the worst case scenario, last for 30 days only.
If you wish to save the battery’s energy, it should be set to the lowest interval
possible between updates. The level of transmission power to communicate
with the AirGate-Modbus of the network has an effect on its life, too. So, the
device should be configured to operate under the minimum power and as close
to an AirGate-Modbus of the network as possible.
8WIRELESS
RHT-Air has an IEEE 802.15.4 wireless connection to connect with
AirGates-Modbus that has its firmware updated to a version more recent
than V1.23. The first RHT-Air configuration must be done through a USB
through Software DigiConfig, as the necessary parameters for
communication with AirGates should be set. After the first time it is
configured and matched with a AirGate-Modbus, RHT-Air will operate as a
Modbus RTU slave. From this moment on, all its resources can be accessed
through the reading of its registers in any Modbus RTU site. The
Programming button can be used for configurations.
The information necessary for data reading without DigiConfig can be found
in this item. Software DigiConfig should be used in order to ensure the
device’s correct configuration. After it is configured, its data can be accessed
by any other software with Modbus RTU communication capacity.
7.1 MODBUS COMMANDS
The following Modbus RTU commands (functions) are implemented: For
further information on each one of these functions and on the Modbus
protocol in general, go to www.modbus.org.
READ HOLDING REGISTERS – 0x03
This function can be used to read a value of one or up to 42 retentive
registers, as per the “Retentive Registers Table”.
WRITE HOLDING REGISTERS – 0x06
This function can be used to write in a retentive register, as per the
“Retentive Registers Table”.
7.2 DESCRIPTION OF SOME REGISTERS
Once the RHT-Air meets an AirGate-Modbus and is matched, this AirGate will
be last published by RHT-Air. Therefore, when the Master of the Modbus
network requires that the RH-Air address be read, the response is sent
immediately and the expiration of this publication can be checked through
register 30, which shows how long it has been since the last publication.
REGISTER 6 – PAN ID
A common identifier for each IEEE 802.15.4 wireless network. All machines
from a common network (AirGates-Modbus and RHTs-Air) must be
configured with the same PAN ID
REGISTER 7 – ENCRYPTION
This register should be used to enable or disable the use of encryption. If it
is enabled, the encryption key should be the same used for all device
configured with the same PAN ID.
REGISTER 16 – POWER LEVEL
The power level may be adjusted as needed, according to the variations
presented in the table below: The higher the power set, the higher the reach, but
the higher the consumption. It is suggested that the lowest value possible be
configured, since in the event that RHT-Air is not able to communicate with the
AirGate-Modbus, it will automatically increase the transmission power gradually,
until it is able to communicate with AirGate-Modbus or reach the highest
configurable limit. It may be that this register is configured with a value and, after
some time, this value may be altered to adjust to a communicable power.
CODE
POWER LEVEL
0
0 dBm
1
2 dBm
2
4 dBm
3
6 dBm
4
8 dBm
5
10 dBm
6
12 dBm
7
14 dBm

RHT-Air
NOVUS AUTOMATION 6/9
REGISTER 27 – OPERATION CHANNEL
It indicates the operation channel in which the device is operating in the
network. It may vary from 11 to 25, in that every channel is equivalent to one
frequency of operation. The network will always operate on the channel with
less interference among all the 15 possible ones.
CHANNEL OPERATION FREQUENCY
11 2405 MHz
12
2410 MHz
13 2415 MHz
14 2420 MHz
15
2425 MHz
16
2430 MHz
17 2435 MHz
18
2440 MHz
19
2445 MHz
20 2450 MHz
21
2455 MHz
22
2460 MHz
23 2465 MHz
24
2470 MHz
25
2475 MHz
REGISTER 28 – LINK QUALITY INDICATOR
It serves to inform the quality of the reception link of the connection between the device and the AirGate-Modbus with which it is matched. This value is obtained by
measuring the power of the last package received. This power is measured in dBm, which is a logarithmic power unit in mW. The LQI may vary from -100 dBm (worst
reception quality) to -15 dBm (best reception quality).
For device operating in ideal settings, with no obstacles and no electromagnetic interference, LQI will display a graphic similar to the one below, wherein the different
power levels for the Distance vs. LQI relation are compared.

RHT-Air
NOVUS AUTOMATION 7/9
The table below relates the values obtained in the reading of the LQI to the
evaluation of the quality of the signal. The same information can be viewed in a
more intuitive way in the tab DigiConfig Software Diagnosis.
REGISTER VALUE
QUALITY
ICON
0
USB-connected
device
-15 to -60 Great
-60 to -70 Very Good
-70 to -80 Good
-80 to -90 Regular
-90 to -100 Bad
NOTE: The model described in the graphic takes in consideration the
propagation channel only. LQI may vary due to several factors, such as due
to peripheral obstacles such as trees, buildings, hills that interfere in the
propagation channels as explained by the Fresnel Zone phenomenon.
REGISTER 29 – BATTERY POWER
It has the value of the measurement of the battery power’s level in an
engineering unit. The decimal point is fixed in three places, the value has no
point and must be provided in the reading software.
A fully charged battery typically has a power above 3.6 V. As you use the
RHT-Air, the power of the battery will gradually decrease. It is
recommended that you check the value of this register regularly so that
when it reaches below 3.3 V, the battery can be replaced.
The verification of the capacity of the battery can be done through the
DigiConfig Software Diagnosis tab, which will display an icon. The evaluation
of battery capacity can be done according to the criteria presented below:
REGISTER VALUE
BATTERY
CAPACITY ICON
0
USB-connected
device
3500 to 3700 Great
3400 to 3500 Very Good
3300 to 3400 Good
3200 to 3300
Average – Get ready
to replace your
battery
Lower than 3200
Bad – Replace the
battery as soon as
possible
NOTE 1: Even when the power is below 1100, the device will operate
normally.
NOTE 2: The gradual failure of the battery’s power is not linear, therefore,
though the device is able to continue working under tensions below 3.0 V,
when it reaches this level, there is little left for its life, since the power will fail
more quickly.
NOTE 3: When the device is being supplied by an external power source, the
value presented represents the power supply of the circuit after the power
regulator reaches 3.6 V. This value may vary according to the setting’s
conditions, but should not be lower than 3.3 V.
NOTE 4: The machine’s operating temperature has a significant impact on
the battery’s capacity. Temperatures below 0 °C will typically shorten the
battery’s life.
NOTE 5: The update time, as well as the operating power, have a significant
impact on the battery’s capacity. If the device is configured for the lowest
update interval, the battery will typically last less. The same happens when
the device is far from the AirGate-Modbus with which it should be matched,
needing a higher transmission power to operate.
REGISTER 30 – LAST POLL’S DURATION
Every time the RHT-Air publishes something on AirGate-Modbus, this
register gets a zero value. Every 100 ms, this register is increased in one
unit in order to indicate how long it has been since the last publication.
REGISTER 31 – MODBUS
It sets the address of the device on the Modbus network. This address
identifies the device on the Modbus network. Its configuration may range
from 1 and 247, and it should be stressed that there cannot be more than
one piece of device with the same address on the same network. RHT-Air is
originally manufactured with the address 246. When connected to a USB
interface, it always responds to Modbus functions through the address 246
to a BaudRate 115200 that has no parity and with 2 Stop Bits. When it is in
operation, it always responds through the address it was configured for in
this register according to the communication parameters of the Modbus
network on which it was installed.
REGISTER 32 – UPDATE TIME
It sets the configuration for how often the device wakes to publish
information on the AirGate-Modbus with which it is matched and update the
IHM screen.
The shorter the update time, the more recent the data available to the
master of the Modbus network will be, but the higher the energy
consumption spent and the battery's life will be proportionately shorter. On
the other hand, the higher the update time set, the lower the energy
consumption spent will be, thus providing a longer life for the battery.
REGISTER 33 – INDICATION MODE
It sets the mode of indication of the values read on the display. The device is
originally manufactured with the indication of temperature and relative
humidity.
CODE DESCRIPTION
0 Indicates the temperature and relative humidity.
1
Indicates the temperature and dew point.
2 Indicates relative humidity and dew point.
3 Indicates the temperature only.
It has the value of the measurement in an engineering unit. The decimal
point is fixed in one place, the value has no point and must be expected for
the reading software.
REGISTER 34 – CONFIGURATION OF THE MEASUREMENT UNIT
It sets the measurement unit for both temperature and dew point. The device
is originally configured in (ºC).
CODE UNIT
0 ºC
1
ºF
REGISTER 35 – DISABLES CONFIGURATION THROUGH A BUTTON
It sets the alteration of configuration through a button.
CODE DESCRIPTION
0
Original standard value.
1
Disables the alteration of configuration of communication
parameters through a button.
REGISTER 36 – USER OFFSET FOR TEMPERATURE
It sets the user’s offset value in engineering units for temperature. The
device’s offset value is originally zero.
REGISTER 37 – USER OFFSET FOR HUMIDITY
It sets the user’s offset value in engineering units for relative humidity. The
device’s offset value is originally zero.
REGISTER 38 – ERROR VALUE
It contains the error value that is transmitted when the sensor has a problem.
The device's original value is -9999.

RHT-Air
NOVUS AUTOMATION 8/9
REGISTER 39 – TEMPERATURE VALUE (ºC or ºF)
It contains the value of temperature measurement in an engineering unit,
including the users’ offset corrections for temperature. The decimal point is
fixed in one place, the value has no point and must be provided in the
reading software.
REGISTER 40 – RELATIVE HUMIDITY VALUE (%)
It contains the value of relative humidity measurement in an engineering
unit, including the users’ offset corrections for temperature. The decimal
point is fixed in one space, the value has no point and must be provided in
the reading software.
REGISTER 41 – DEW POINT VALUE (ºC or ºF)
It has the value of the measurement in an engineering unit. The decimal
point is fixed in one place, the value has no point and must be provided in
the reading software.
HOLDING REGISTERS TABLE
The specified addresses correspond to lower level physical addresses, as zero (0) corresponds to the PLC 40001 address. The columns reserved for minimum and maximum
contain a range of valid values for each parameter. The column reserved for R/W indicates whether the parameters are meant for reading and writing (R/W) or reading only (R).
ADDRESS DESCRIPTION MINIMUM MAXIMUM R/W
0
Retentive register used to manage the RHT-Air configuration stages. (Used by
DigiConfig) 0 7 R/W
1 Title - - R/W
2
Title
-
-
R/W
3 Title - - R/W
4
Title
-
-
R/W
5 Title - - R/W
6
PANID
0
65535
R/W
7 Encryption 0 1 R/W
8 Security keys 0 and 1 0 65535 R/W
9
Security keys 2 and 3
0
65535
R/W
10 Security keys 4 and 5 0 65535 R/W
11
Security keys 6 and 7
0
65535
R/W
12 Security keys 8 and 9 0 65535 R/W
13
Security keys 10 and 11
0
65535
R/W
14 Security keys 12 and 13 0 65535 R/W
15 Security keys 14 and 15 0 65535 R/W
16
Power Level
0
7
R/W
17 Reserved - - R
18
Serial Number (
word high
)
0
65535
R
19 Serial Number (word low) 0 65535 R
20
Long MAC address 0 and 1
0
65535
R
21
Long MAC address
2 and 3
0
65535
R
22 Long MAC address 4 and 5 0 65535 R
23
Long MAC address
6 and 7
0
65535
R
24 Short MAC address 0 65535 R
25
Firmware version
0
65535
R
26 Device code 103 103 R
27
Operation channel
11
25
R
28 LQI – Link quality indicator -100 -15 R
29 Battery power (V)
**
0 3700 R
30 Time of last publication (100 ms) 0 65535 R
31
Modbus Address
1
247
R/W
32
Update time (s)
15
1800
R/W
33 Indication mode 0 3 R/W
34
Measurement unit configuration
0
1
R/W
35 Disables Configuration through a Button 0 1 R/W
36 User Offset For Temperature
*
-100 100 R/W
37 User Offset For Humidity
*
-100 100 R/W
38 Error value -9999 9999 R/W
39 Temperature value (ºC or ºF)
*
-400 800 R
40 Relative Humidity value (%)
*
0 1000 R
41 Dew Point Value (ºC or ºF)
*
-400 800 R
*For the abovementioned table ranges, one decimal place should be considered. Example: -100 means -10.0.
** For the abovementioned table ranges, three decimal places should be considered. Example: 3600 means 3600 V.

RHT-Air
NOVUS AUTOMATION 9/9
9SPECIAL CARE
The device needs special care since it is electronic:
•When opening it for fixation, you should keep away from the electronic
circuit due to the risk of damages caused by static electricity.
•The wiring should be carefully observed.
•When closing the box, the cover must be replaced properly, thus
ensuring that it is sealed.
9.1 CARE WITH SENSORS
The calibration of the humidity sensor can be altered if it is exposed to
contaminating vapors or extreme humidity or temperature conditions for
longer periods. In order to speed up the calibration, do as follows:
•Remove the sensor from the capsule.
•If solid particles are deposed on the sensor, wash it with water.
•Place the sensor in an oven at 80 °C (+ -10 °C) for 24 hours.
•Place the sensor for 48 hours in a place at around 20 and 30 °C and
humidity higher than 75% RH.
•Replace the sensor into the capsule.
9.2 BATTERY CARE
The Lithium battery, due to its chemical behavior, may present some
passivation symptoms when not used for long periods of time. This can be
observed by checking the battery voltage after 2 hours of device operation.
If the battery voltage measures less than 3.5 V, then the battery may be
passivated (not necessarily worn out). If this is the case, please try applying
the following procedures to recover the battery.
•Operate the device at its maximum power (14 dBm) and minimum
sample period (15 s).
•Let the instrument operate continuously in the above conditions for 24 h
while monitoring the battery voltage through reading register number 29
or the Diagnostic menu of the DigiConfig software.
•If the battery voltage exceeds 3.5 V, the battery can be considered
rehabilitated (depassivated). The device is then ready to use.
•In case the above doesn’t work, please remove the battery from the
device and discharge it for 5 minutes connecting a 220 ohm resistor
across the terminals.
•Then, reinstall the battery in the device and let it operate for 2 hours. If
the battery voltage remains above 3.5 V, then the depassivation
procedure was successful.
•If after going through the above procedures the battery still fails to work
properly, please contact technical assistance for arranging battery
replacement.
IMPORTANT
The sensor used in this device may be damaged or de-calibrated if exposed
to contaminated atmospheres with chemical agents. Hydrochloric acid, nitric
acid, sulfuric acid and ammonia in high concentrations may damage the
sensor. Acetone, ethanol and propylene glycol may cause reversible
measurement errors.
10 WARRANTY
Warranty conditions are available on our website
www.novusautomation.com/warranty.