IE-HGS-H5(6)0XX-05
7
5. Description of device function and setting
5.1.
Device setting from the manufacturer
Value assigned to Relay1 and Relay2:
none
Password for setting through keys:
0000
LCD display:
on
value shown at first LCD line:
temperature / CO
2
- 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:
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
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. 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 “
”). 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 “
”).
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 “
).
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
