GUILCOR AR006709 User manual

CO2concentration, temperature, humidity
and other calculated humidity variables regulator
with RS485 serial output
AR006709
AR006708
AR006710
Instruction Manual

2
Table of content
1. GENERAL DESCRIPTION......................................................................................................4
2. REGULATOR MOUNTING AND CONNECTION...............................................................4
3. DIMENSIONS.............................................................................................................................5
4. TYPICAL APPLICATION WIRING, CONNECTION OF TERMINALS .........................8
5. DESCRIPTION OF DEVICE FUNCTION AND SETTING.................................................9
5.1. DEVICE SETTING FROM THE MANUFACTURER ...................................................................................... 9
5.2. RELAY OUTPUTS ................................................................................................................................... 9
5.3. CARBON DIOXIDE CONCENTRATION MEASUREMENT.......................................................................... 10
5.4. ACTUAL REGULATOR PRESET ............................................................................................................. 10
5.4.1. Value assigned to output relay...................................................................................................................... 10
5.4.2. When close output relay................................................................................................................................ 11
5.4.3. Regulator address setting.............................................................................................................................. 12
5.5. REGULATOR SETTING CHANGE ........................................................................................................... 12
5.5.1. Setting with PC and TSensor software.......................................................................................................... 12
5.5.2. Setting with using regulator keys .................................................................................................................. 12
5.5.3. Setting with using of Modbus communication protocol ................................................................................ 13
5.6. EXTENDED SETTING MODE.................................................................................................................. 13
5.7. RESTORE TO „FACTORY DEFAULT“.................................................................................................... 17
6. DESCRIPTION OF COMMUNICATION PROTOCOLS ..................................................18
6.1. MODBUS RTU..................................................................................................................................... 18
6.1.1. Supported functions ...................................................................................................................................... 18
6.1.2. Jumper .......................................................................................................................................................... 18
6.1.3. Modbus registers of the regulator................................................................................................................. 19
6.1.4. Far controlling of output relays status.......................................................................................................... 19
6.1.5. Output relay alarm condition configuration with using of Modbus communication protocol ...................... 20
6.2. PROTOCOL COMPATIBLE WITH ADVANTECH-ADAM STANDARD ...................................................... 21
6.2.1. Jumper .......................................................................................................................................................... 22
7. ERROR STATES OF THE DEVICE .....................................................................................23
8. READINGS ON LCD DISPLAY ............................................................................................24
9. PREVENTIVE MAINTENANCE AND CALIBRATION ...................................................24
10. TECHNICAL SPECIFICATION............................................................................................24
10.1. TECHNICAL PARAMETERS ................................................................................................................... 24
10.1.1. Common parameters..................................................................................................................................... 24
10.1.2. AR006709 - CO2regulator ........................................................................................................................... 25
10.1.3. AR006708 - CO2regulator ........................................................................................................................... 25
10.1.4. AR006710 - temperature, relative humidity and CO2regulator ................................................................... 25
10.1.6. Relative humidity and temperature restriction.............................................................................................. 26
10.1.7. Value computed from measured relative humidity and temperature ............................................................ 27
10.2. OPERATING CONDITIONS .................................................................................................................... 28
10.3. END OF OPERATION............................................................................................................................. 29
10.4. TECHNICAL SUPPORT AND SERVICE.................................................................................................... 29
11. APPENDIX A ............................................................................................................................ 29
12. APPENDIX B ............................................................................................................................30

3
General safety rules
The following summary is designed to prevent injury hazards or device damage. Operate the
instrument in accordance with this manual to prevent electric trauma.
Service should be performed by a qualified person only.
Connect and disconnect correctly. Do not connect and disconnect a lead-in cables if the device is
under electric voltage.
Do not use the instrument without the cover.
Do not use the instrument, if it does not work correctly. If the instrument seems not to work
correctly, have it checked by a qualified service person.
Do not use the instrument in an explosive environment.
Read instruction manual before the first device connection, please.
Copyright: It is prohibited to copy and edit this instruction manual and make any changes at all
without explicit agreement of Guilcor. All rights reserved.

1. General description
The regulators are designed for online measurement of temperature (°C or °F), relative humidity
and carbon dioxide concentration of air without aggressive ingredients. Measured temperature and
relative humidity are recomputed to following humidity expression: dew point temperature, absolute
humidity, specific humidity, mixing ratio and specific enthalpy.
The regulators are designed to be operated in a chemically non-aggressive environment.
Type
Temperature
Humidity
CO2
Computed value
AR006709
-
-

-
AR006708
-
-

-
AR006710




The device is equipped with two relay outputs for alarming or controlling of external devices. It is
possible to assign any input value to each relay, to set comparing limit, delay, hysteresis, acoustic
alarm or change its status by far control with using of Modbus communication protocol.The device
communicates via link RS485.
Supported communication protocols are Modbus RTU and protocol compatible with standard
Advantech-ADAM. Devices are preset from manufacturer to Modbus RTU communication protocol.
If you would like to use different communication protocol then Modbus RTU, it is necessary preset
them –see latter. Measured and computed values are displayed on dual line LCD. It is also possible
to display both readings with cyclic overwriting in 4 seconds interval. Display can be also switched
OFF totally. On the left LCD side there are placed three LEDs for CO2zone level indication.
2. Regulator mounting and connection
Regulators are designed for wall mounting. Device must be mounted on the plane surface to
prevent its deformation. Mounting holes and connection terminals are accessible after demounting of
four screws in the corners of the box and removing the lid. There is recommended to use screws with
half round head with cross-recessed screw ST 3.9 (DIN 7981). External probe for measuring the
concentration of CO2 unpack and connect to the
device.
Lace the lead-in cable with outer diameter
of 3 to 6.5 mm through the glands at the case
wall and connect them according schematic
below. Terminals are self-clamping and can be
opened by asuitable screwdriver. For the
opening, insert the screwdriver to smaller
terminal hole and lever by him. Do not forget to
tighten glands and case lid with inserted packing
after cables connecting. Insert attached plug into
unused cable glands too. Do not connect the
regulator under voltage.
It is not recommended to use the device
AR006710 and external RH+T probe
regulator for long time under condensation
conditions. It could be the cause of water steam
condensation inside the sensor’s cover into
water
4

5
phase. This liquid phase stays inside sensor’s cover and can’t escape from the cover easily. It can
dramatically increase response time to relative humidity change. If water condensation occurs for
longer time it can cause sensor damage. Similar effect can occur under water aerosol conditions.
For devices with RS485 output there is recommended to use shielded twisted copper cable,
maximal length 1200m. The cable must be located at indoor rooms. Nominal cable impedance should
be 100 Ω, loop resistance max. 240 Ω, cable capacity max. 65 pF/m. Outside diameter of the cable
for regulator connection must be from 3 to 6.5 mm. Suitable cable is e.g. SYKFY 2x2x0.5 mm2,
where one wire pair serves for device powering and the other pair for communication link.
The cable should be led in one line, i.e. NOT to „tree“ or „star“. Termination resistor should be
located at the end. For short distance other topology is allowed. Terminate the network by a
termination resistor. The value of the resistor is recommended about 120 . For short distance
termination resistor can be left out.
The communication cable must be placed as far as possible from potential interference sources.
Electrical system (wiring) may do only worker with required qualification by rules in operation.
3. Dimensions
AR006710

6
AR006709

8
AR006708
4. Typical application wiring, connection of terminals

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5. Description of device function and setting
Information from regulator is available directly through LCD or you can read them with one of
next communication protocols ( Modbus RTU, Advantech-ADAM ).
5.1. Device setting from the manufacturer
communication protocol: Modbus RTU
regulator address: 1
communication speed: 9600Bd, no parity, 2 stop bits
Value assigned to Relay1 and Relay2: none
Password for setting through keys (PASS): 0000
LCD display: on
value shown at first LCD line: temperature / CO2 - by device type
value shown at second LCD line: relative humidity / dew point temp. - by device type
temperature unit: °C
computed value preset: dew point temperature
relay response for error: stay unchanged at previous condition
acoustic alarm: off
LED indication of CO2concentration up to 1000 ppm lights green LED, between 1000 and
1200 ppm lights yellow LED and over 1200 ppm
lights red LED
altitude: 300 m above sea level at the installation site
5.2. Relay outputs
Regulator is equipped with two relay outputs. It is possible to assign any input or computed value
or “Far condition” (see chapter “Far controlling of output relays status”at page 19) to each relay, to
set comparing alarm limit, if the relay may close if measured value is higher (Hi) or lower (Lo) than
preset limit, delay for while must be preset condition true before relay close its contact and hysteresis
for return to open status. For binary inputs: if it is preset to „HI“ then output relay is closed when
input contact is opened, if it is preset to „Lo“ then output relay is closed when input contact is closed.
Each relay status is indicated with LED diode and shown on LCD with corresponding symbols „
“ or „ “.
Terminal block for connecting the relays is equipped with terminals GND, which are connected
to the power supply of the device (see chapter “Typical application wiring, connection of terminals”).
When you need to use relays to switching the voltage identical with the supply voltage of the device,
you can use jumpers J1 and J2 for interconnection the power supply of the device directly with the
common contacts of the relays. This modification is used in devices with serial number higher
than 16981000 (the wiring diagram of the relay contacts for devices with serial number lower than
16981000 is given in the “Appendix B”).
The devices are equipped with two relays that are not intended for direct switching power circuits
or mains voltage. If necessary, use suitable type of external relay (an example of wiring is given in
the “Appendix A”).

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5.3. Carbon dioxide concentration measurement
A multiple point CO2 and temperature adjustment procedure leads to excellent CO2 measurement
accuracy over the entire temperature working range; this is a must for process control and outdoor
applications. The dual wavelength NDIR CO2 sensing procedure compensates automatically for
ageing effects. The CO2 module is highly resistant to pollution and offers maintenance free operation
and outstanding long term stability. Measured values can be read in „SLOW mode“ (filtered,
averaged) or in „FAST mode“ (current values without averaging). SLOW mode has advantages in
applications like climate control because of filtering short time peaks. As an example exhaled air
from an employee passing the sensor could affect the climate control negatively with a short response
time because the control would trigger a change of the ventilation based on this one-time
measurement. On the contrary in „FAST mode“ no software filter is used for calculating the output
value. This fact adds a noise of typ. ±30ppm which has to be considered in terms of accuracy. Of
principle measurement is the measured value of CO2concentration depends on the value of air
pressure - altitude at the installation site. For this reason, it is suitable for accurate measurement to
set the altitude of the installation site by TSensor software.
After power up there is internal check in progress and takes about 20 s. During this time LCD
display shows (----) instead of CO2concentration value.
Parameter setting description is into chapter “Regulator setting change” at page 12.
5.4. Actual regulator preset
It is possible to display actual regulator preset on its LCD display by
pressing of „▲“ key. If far controlling of output relays status is active (see
chapter 6.1.4 at page 19), then device’s LCD display shows text „bloc“. It
means, device’s keyboard is disabled for time of remote control (setting
change), see chapter 6.1.5 at page 20. LCD shows information about Relay1
and then Relay2 setting step by step. Information about Relay1 are indicated
with symbol „ “, for Relay2 with symbol „ “ (at right top corner of LCD). It
is possible to edit parameters after pressing „SET“ key and entering of correct password „PASS“ –
see chapter “Change of “Password for setting through keys” (PASS)” at page 14. Following examples
are for Relay1 setting, similarly are displayed values for Relay2. Pressing of „ESC“ key ends this
mode and switch to actual value displaying, the same occur if more than 20 s is not pressed any key.
5.4.1. Value assigned to output relay
None, relay is still off
Temperature at °C
Relative humidity
Computed value –dew point temperature
CO2concentration
Far condition 0

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FAR0 –„far condition 0“: after device’s power on the relay is open
FAR1 –„far condition 1“: after device’s power on the relay is close
If “far condition” is assigned to output relay, then there is possible to
change the output relay status by Modbus communication protocol only.
See chapter “Far controlling of output relays status” at page 20.
5.4.2. When close output relay
High limit „HI“ –the relay closes when measured value exceeds preset „high limit” for longer
time than preset „delay time“. Relay goes open when measured value decrease under „high limit“
value minus the „hysteresis” value. See example.
High limit „HI“
Delay [s]
Hysteresis
Low limit „Lo“ –the relay closes when measured value falls below preset „low limit” for longer
time than preset „delay time“. Relay goes open when measured value exceeds „low limit“value plus
the „hysteresis” value. See example.
Low limit „Lo“
Delay [s]
Hysteresis
Far condition 1