SRC-C1T1
CO2+T
EMPERATUR
T
RANSMITTER
/M
ONITOR
Doc: 70-00-0794A, V2.7, 20210310
© Vector Controls GmbH, Switzerland
Page 1-10
Subject to change without notice
www.vectorcontrols.com
SRC-C1T1 - Indoor CO2+Temperature Transmitter
The SRC-C1T1 is an indoor CO2 monitoring and temperature measuring
transmitter. Three LEDs in the colors green, orange and red indicate the CO2
concentration of the room air. This shows the user when to ventilate. The device
has two analog outputs and one relay output. The CO2 background calibration of
the SRC-C1T1 guarantees for accurate room air monitoring.
Features
•
Indoor CO2 and temperature measurement
•
Indication with three separate color LEDs
•
Minimum and maximum CO2 and temperature value memory
•
Two analog output signals for CO2 and temperature values
•
0…10
V or 2…10
V measuring analog output signal selectable with
jumpers
•
Relay output indicating CO2 concentration
•
Levels of CO2 indication programmable
•
Automatic CO2 background calibration
•
Output signal ranges programmable
•
May be used as simple P-controller
•
Averaging signal adjustable
•
Optional external display (OPA-S)
•
Status LED
Applications
•
Indoor CO2 and temperature measurement
(home, office, school, restaurant, greenhouse, …)
•
Recording of minimum and maximum CO2 and temperature 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
samples and generates the output signal.
The analog output signal range may be customized by jumpers and if required by a programming module. Standard signal
ranges are 0
…
10 VDC and 2
…
10 VDC. Other ranges can be defined by using the external display and programming
module (OPA-S).
For OPA-
S usage see section “
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 deactivate through the
external operation terminal. The Sensor can be calibrated by the client and does not need to be sent in for
calibration.
For manual calibration see section “
on page 8.
Temperature transmitter
The temperature is measured with a precision sensing element. The microprocessor samples the temperature once per
second. It calculates an averaging signal over a preset number of samples and generates an analog output signal based
on a lower and an upper signal range value. Standard range is -
40…60°C (
-
40…140°F) and 10 seconds average. The
measuring range and the averaging samples may be customized with the external display and programming module
(OPA-S).
The analog output signal range may be selected by jumpers and if required by a programming module. Standard signal
ranges are: 0…10 VDC and 2…10 VDC. Other ranges can be defined by
using the external display and programming
module (OPA-S).
For OPA-
S usage see section “
” on page
