Vector SRC-C1 Operation Manual

SRC-C1

Item name

Item code

Description/option

SRC-C1

40-30 0062

CO2 transmitter

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

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

Accessories

Doc: 70-07-0220, V1.2, 20170131, Subject to alteration, ©Vector Controls GmbH, Switzerland, www.vectorcontrols.com Page 1

SRC-C1

Power supply

Operating voltage

24 V AC 50/60 Hz ± 10%, 24 VDC ± 10%
SELV to HD 384, class II transformer, 48 VA max.

Power consumption

Max. 2 VA

Connection

Terminal connectors

For wire 0.34…2.5 mm2 (AWG 24…12)

CO2 measurement

Sensing method

Non-dispersive infrared (NDIR) waveguide technology
with ABC automaticbackground calibration algorithm

Sampling method

Diffusion

Response time (T

1/e

)

40 sec diffusion time

Measurement range

0 - 5000 ppm

vol.

Repeatability

± 20 ppm ± 1 % of measured value

Accuracy

± 30 ppm ± 3 % of measured value

Pressure dependence

+ 1.6 % reading per kPa deviation from normal
pressure, 100 kPa

Signal outputs

Analog outputs
Output signal
Resolution
Maximum load

DC 0-10V or 0…20 mA
10 bit, 9.7 mV, 0.019.5 mA
Voltage signal: ≥1kΩ, current signal: ≤500Ω

Environment

Operation
Climatic conditions
Temperature
Humidity

To IEC 721-3-3
class 3 K5
0…50° C (32…122° F)
<95% RH non-condensing

Transport & storage
Climatic conditions
Temperature
Humidity
Mechanical conditions

To IEC 721-3-2 and IEC 721-3-1
class 3 K3 and class 1 K3

-30…70° C (-22…158° F)
<95% RH non-condensing
class 2M2

Standards

conformity
EMC directive
2004/108/EC

EN 61 000-6-1/ EN 61 000-6-3
Degree of protection

IP30 to EN 60 529

Safety class

III (IEC 60536)

Housing materials

Cover
Mounting plate

Fire proof ABS plastic
Galvanized steel

General

Dimensions (H x W x D)

21 x 88 x 88 mm (0.8” x 3.5” x 3.5”)

Weight (including package)

175 g (6.2 oz.)

88 (3.5)

88 (3.5)

21 (0.8)

Technical Specification

Safety advice

This device may only be installed and configured by a skilled electrician. Where a device failure endangers human life and/or
property, it is the responsibility of the client, installer and designer to add additional safety devices to prevent or detect a
system failure caused by such a device failure.

Dimensions mm (inch)

Doc: 70-07-0220, V1.2, 20170131, Subject to alteration, ©Vector Controls GmbH, Switzerland, www.vectorcontrols.com Page 2