ELT Sensor CD-300 User Manual

ELT SENSOR Corp.
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General
CD-300(G)and CD-300L(G) Transmitter type
models of CO2 Sensor, which are for 0-20mA ,
4-20mA Current output module or 0-10V, 2-
10V Voltage output module(Jumper select)
These models give 3 wired input power (2
PWR lines, 1 Common GND line).
Features
• Non-Dispersive Infrared(NDIR) technology
• Either of four (2 Set of Analog Voltage or
2 set Current) output can be chosen by
Jumper. (4~20mA/2~10V/0~20mA/0~10V)
• Customer could select multiple functions
-. Factory calibration mode is available.
-. 10 minutes manual recalibration or weekly
Auto-Calibration is settable.
• Simple maintenance (S-300(G) sensor is
detachable from main board, which gives
easier manipulation on sensor module.)
• Size : 123 x 69 x 40 (mm)
Carbon Dioxide (CO₂) Transmitter
(3-wired type) Operation Manual
CD-300(G) / CD-300L(G)
0-NL
CD-300(G)
CD-300L(G)
(with LCD Display)
Version 2.72

ELT Sensor CD-300 Specifications

General

Brand	ELT Sensor
Model	CD-300
Category	Transmitter
Language	English

Summary

Product Overview and Features

General Product Description

Describes CD-300(G) and CD-300L(G) transmitter type CO2 sensors with output and power options.

Key Product Features

Highlights NDIR technology, selectable output options, calibration modes, and simple maintenance.

Transmitter Specifications

General Performance Specifications

Details operating temperature, humidity ranges, and storage temperature for the transmitter.

Electrical Data

Specifies input power requirements as 24VDC ± 20% (3-Wired).

CO2 Measurement Details

Covers sensing method (NDIR), measurement range, accuracy, response time, and sampling interval.

Operation Mode Selection

Explains factory calibration, manual recalibration, and auto-calibration modes.

Jumper Functionality and Wiring

Jumper Function Descriptions

Details jumper settings for output type, range selection, and output modes (e.g., 0-20mA, 4-20mA).

Jumper B(J11) Configuration

Explains jumper settings for CO2 measurement range selection (Low and High ranges).

Wiring Method

Details connections for VIN+, VIN- (Common GND), and A-OUT (Output Signal).

Output Signal Calculation Examples

Output Signal Calculation

Provides examples for calculating ppm based on read voltage for 0-10V and 2-10V modes.