HK Instruments CMT Series Installation Instructions

INTRODUCTION

Thank you for choosing an HK Instruments CMT series carbon
monoxide transmitter. CMT is an easy-to-use, reliable transmitter
for detecting CO gas. It is commonly used to control ventilation in
areas where high concentrations of CO may cause serious health
problems.
The recommended transmitter calibration interval is one year.

APPLICATIONS

CMT devices are commonly used in places where air includes CO gas
emissions, such as:
• Commercial parking garages
• Apartment garages
• Tunnels and terminals
• Car and bus maintenance garages
• Warehouses and factories
• Car service centers

SPECIFICATIONS

SPECIFICATIONS
Performance
Measurement range:
0...300 ppm CO
Linearity:
≤2 % on 300 ppm CO
Cross sensitivity:
≤2 % on 300 ppm CO
Reproducibility:
≤3 ppm
Technical Specifications
Response time:
<60 s
Gas entry:
by diffusion
Measuring element:
Electro-chemical
Environment:
Operating temperature: -10...40 °C
Humidity: 15 to 95 % rH
Copyright HK Instruments 2019
CARBON MONOXIDE TRANSMITTERS
CMT Series
• READ THESE INSTRUCTIONS CAREFULLY BEFORE
• Failure to observe safety information and comply with
• To avoid electrical shock or damage to equipment, disconnect
• To avoid potential fire and/or explosion do not use in potentially
• Retain these instructions for future reference.
• This product, when installed, will be part of an engineered
Physical
Case:
Dimensions: 90 x 95 x 36 mm
Weight: 87 g
Materials:
Case: ABS
Lid: PC
Protection standard:
IP54
Electrical connections:
2-pole screw terminal, max 1.5 mm
Cable entry:
M16
Electrical
Supply voltage:
14...28 VDC
Output signal:
4...20 mA, maximum load 300 Ω
www.hkinstruments.fi

WARNING

ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
DEVICE.
instructions can result in PERSONAL INJURY, DEATH AND/OR
PROPERTY DAMAGE.
power before installing or servicing and use only wiring with
insulation rated for full device operating voltage.
flammable or explosive atmospheres.
system whose specifications and performance characteristics
are not designed or controlled by HK Instruments. Review
applications and national and local codes to assure that the
Installation will be functional and safe. Use only experienced and
knowledgeable technicians to install this device.
Conformance
Safety for sensor:
TÜV-approval according to VDI 2053
R.F.I according to EN 50 081-1 resp. EN 50 082-2 B
Meets the requirements for CE marking:
EMC Directive: 2014/30/EU
RoHS Directive: 2011/96/EU
WEEE Directive: 2012/19/EU
2
COMPANY WITH
MANAGEMENT SYSTEM
CERTIFIED BY DNV GL
= ISO 9001 = ISO 14001 =
INSTALLATION
INSTRUCTIONS
RoHS 2
2011/65/EU
Installation version 5.0 2019