COMET H5321 CO2 Concentration Transmitter w/RS232 And Two Relay Outputs User Manual
- June 13, 2024
- COMET
Table of Contents
COMET H5321 CO2 Concentration Transmitter w/RS232 And Two Relay Outputs
Product Information
The programmable regulators with RS232 or RS485 serial interface are designed to measure temperature and relative humidity of air, measure concentration of CO2 in air, signal alarms, and control external devices. These regulators can be used in a chemical non-aggressive environment. The CO2 concentration is measured using the dual wavelength NDIR sensor with multipoint calibration, which compensates for aging of the sensing elements and offers maintenance- free operation and outstanding long-term stability. The regulators support Modbus RTU protocol and a protocol compatible with standard Advantech-ADAM. For setting all parameters, the Tensor software can be used.
PRODUCT DESCRIPTION
Programmable regulators with RS232 or RS485 serial interface are designed to measure temperature and relative humidity of air, to measure concentration of CO2 in air, to signal alarms and control of external devices. Regulators can be used in a chemical non-aggressive environment.
The CO2 concentration is measured using the dual wavelength NDIR sensor with the multipoint calibration. This principle compensates aging of the sensing elements and offers maintenance free operation and outstanding long term stability.
The function of two output relays can be set from regulator keyboard (or from computer) and using the jumpers (see „Electrical wiring”). You can assign one of measured or computed value (dew point temperature, absolute humidity, specific humidity mixing ratio and specific enthalpy) to each relay. Setting of delay, hysteresis, audible alarm is enabled for each relay too. Devices are equipped with four button keyboard and two-line LCD display. The visual indication of the CO2 concentration is provided by three LEDs to the left side of the display.
Regulators suppor t Modbus RTU protocol and protocol compatible with standard Advantech-ADAM. For setting of all parameters you can use Tensor software (see www.cometsystem.com).
Type| Serial Interface| Measured Values| Version| Mounting| Galvanic Isolated
Output
---|---|---|---|---|---
H5321| RS232| CO2| Probe on cable wall| No
H5324| RS232| CO2| Ambient air| Wall| No
H5421| RS485| CO2| Probe on cable wall| Yes
H5424| RS485| CO2| Ambient air| Wall| Yes
H6320| RS232| T + RH + CO2 + CV| Ambient air| Wall| No
H6321| RS232| T + RH + CO2 + CV| Probes on cable wall| No
H6420| RS485| T + RH + CO2 + CV| Ambient air| Wall| Yes
H6421| RS485| T + RH + CO2 + CV| Probes on cable wall| Yes
INSTALLATION AND OPERATION
The mounting holes and connection terminals are accessible after unscrewing
the four screws in the corners of regulator and removing the lid. Devices have
to be mounted on a flat surface to prevent deformation. Pass cables (external
diameter 3 to 6.5 mm) through released glands and connect wires. Wire cross-
section choose from 0.14 to 1.5mm2. The communication cables should be
shielded. Do not forget to insert attached plugs into unused cable glands. The
cables should be located as far as possible from potential interference
sources. Unpack the external CO2 probe and connect it to the device. Pay
attention to mounting the device and probes, because incorrect choice of
working position or place of measuring could adversely affect accuracy and
long-term stability of measured values.
Actual parameters settings of each relay can be displayed by pressing of key.
To change any parameter, press the „ Set “ key, enter password (default
0000) and set required value. Then click on „Set“ and pressing „Esc“
key exit setup mode. To change the password and to set all other parameters
(acoustic alarm, limits of CO2 indication, response to the error status,
choice of communication protocol, select the computed value etc.) is used
Extended setting mode (see manual for devices at
www.cometsystem.com).After switching the device
starts internal test. During this time (about 20 s) LCD display shows —-
instead of CO2 concentration value. Devices don´t require special
maintenance. We recommend you periodical calibration for validation of
measurement accuracy.
COMMUNICATION PROTOCOLS AND ERROR STATES
Description of communication protocols you can download from
www.cometsystem.com. Device setting from the
manufacturer is Modbus RTU, address 1, communication speed 9600 Bid (no
parity, 2 stop bits).
Device continuously checks its state during operation and if an error appears,
it is displayed relevant code:
- Err measured or calculated value (except the concentration of CO2) is over the upper limit,
- Err measured or calculated value is below the lower limit or CO2 concentration measurement error occurred,
- Err and Err there is problem with assigned value to output relay,
- Err inserted password is not valid, Err 0, Err 3 and Err
it is a serious error, please contact distributor of the device (for devices with an external probe CO2G-10 the Err 4 indicates that the probe is not connected).
SAFETY INSTRUCTIONS
- Don´t use and don’t store the devices without the cover of the temperature and humidity sensors.
- Temperature and humidity sensors have not to be exposed to direct contact with water and other liquids.
- It is not recommended to use the humidity regulators for long time under condensation conditions.
- Take care when unscrewing the filter cap as the sensor element could be damaged.
- Don’t connect or disconnect devices while power supply voltage is on.
- Installation, electrical connection and commissioning should be performed by qualified personnel only.
- Devices contain electronic components, it needs to liquidate them according to currently valid conditions.
- To complement the information in this data sheet read the manuals and other documentations that are available in the Download section for a particular device at www.cometsystem.com
COMET SYSTEM , 2901 Specifications are subject to change without notice. 756 61 ie-hgs-n-h5(6)3(4)xx-05
- The relative humidity measuring range is limited at temperatures above 85°C, see manuals for devices
- LED indication (preset by manufacturer) : green (0 to 1000 ppm) , yellow (1000 to 1200 ppm), red (1200 to 2000/10000 ppm).
Recommended calibration intervals concentration CO2 – 5 years, relative humidity
1 year, temperature
2 years It is recommended to switch off the LCD display at ambient temperature above 70°C
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>