SRC-C1T1
P
RODUCT
D
ATA
S
HEET
Doc: 70-00-0794, V2, 20200311
© Vector Controls GmbH, Switzerland
Page 1
Subjects to alteration
www.vectorcontrols.com
SRC-C1T1 Indoor CO2+Temperature
transmitter
Features
•
Indoor CO2 and temperature measurement
•
CO2
–
level indication with three colours led
•
Minimum and maximum value memory
•
0…10
V
or 2…10
V measuring signals selectable with jumper
•
Optional alternative signal ranges programmable
•
May be used as simple P-controller
•
Selectable averaging signal
•
Optional external display (OPA-S)
•
Status LED
Applications
•
Indoor CO2 measurement
•
Indoor temperature 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 and 2-10 VDC. These ranges can be set by jumpers. Other ranges can be set by using the
external display and programming module. (OPA-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 deactivate 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.
Temperature transmitter
The transmitter measures the temperature by the use of a precision sensing element. The microprocessor samples the
temperature once per second. It calculates an averaging signal over a preset number of seconds and generates an
output signal based on lower and upper signal range values. 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 programming tool.
Standard output signal range and types may be selected by jumpers. Standard signal
ranges are: 0…10 VDC
and 2…10
VDC. Other ranges can be defined by using a programming tool (OPA-S).
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. The display of minimum maximum values for the
CO2 sensor is limited to 2550. They may only be shown and memorized in steps of 10 ppm. This limitation does not
apply for the current measurement of the CO2 value.
Indication of CO2 concentration:
A three colour LED is used to indicate levels of CO2-concentration: 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 0 ppm< low < 800 ppm< medium < 1500 ppm < high.
The LED lights up for 0.5 seconds in a 5 second interval. The indication light may be disabled through parameter IP05.
