SRC-C1
Doc: 70-07-0220, V1.2, 20170131, Subject to alteration, ©Vector Controls GmbH, Switzerland, www.vectorcontrols.com
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SRC-C1 Indoor CO2 Transmitter
Features
Indoor CO2 measurement
Indication with three color led
Minimum and maximum value memory
0…10 V, 0…20 mA or 2…10 V, 4…20 mA measuring signals selectable
with jumpers
Optional alternative signal ranges programmable
May be used as simple P-controller
Selectable averaging signal
Optional external display (OPU-S)
Status LED
Applications
Indoor CO2 measurement
Recording of minimum and maximum limits for critical environments
Direct control of extraction fan
CO2 transmitter
The CO2 concentration is measured through non-dispersive infrared (NDIR) waveguide technology with ABC automatic
background calibration algorithm. The applied measuring technology guarantees excellent reliability and long term stability.
The microprocessor samples the CO2 once per second. It calculates an averaging signal over a preset number of seconds and
generates the output signal.
The output signal range and type may be customized by jumpers and if required by a programming tool. Standard signal
ranges are 0-10 VDC, 2-10 VDC, 4-20 mA and 0-20 mA. These ranges can be set by jumpers. Other ranges can be set by
using the external display and programming module. (OPU-S)
Automatic Baseline Calibration (ABC)
The ABC background calibration constantly supervises the measured CO2 concentrations. The calibration function expects the
CO2 values sink to 400 ppm when the room is not occupied. Over a period of several days the controller tries to reach this
value step by step through recalibration of 30ppm per day max. In order to reach the given accuracy, it is required that the
Sensor is for at least 3 weeks in operation.
Note
: The ABC calibration works only in those applications where the CO2 concentration sinks regularly to fresh air levels of
400 ppm. For special applications such as green houses, animal farms, etc. the ABC calibration should be de-activated and
the sensor should be manually calibrated. The automatic calibration can be deactivated through the external operation
terminal. The Sensor can be calibrated by the client and does not need to be sent in for calibration. See last page for details.
Minimum and maximum values:
Using a display & programming accessory, the user has the option to read out and reset minimum and maximum values. The
minimum and maximum values may as well be used as output signals. The minimum and maximum values are saved into the
EEPROM and are available after a power interruption.
Indication of air quality indication:
A three color LED is used to indicate air quality: Green light for low CO2 concentration, orange light for medium and red light
for high concentration. The levels for low-medium-high may be programmed.
Default settings are: CO2 > 0 ppm = low, CO2 > 800 ppm = medium, CO2 > 1500 ppm = high.
Ordering
Item name
Item code
Description/option
SRC-C1
40-30 0062
CO2 transmitter
Accessories
Item name
Item code
Description/option
OPU-S
40-50 0006
External display module.
For the correct display of values V1.4 and later is required
