Consilium ST450EC User Manual

Consilium ST450EC

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U S E R M A N U A L

&

T E C H N I C A L I N F O R M A T I O N

ST450EC

Table of Contents

Questions and Answers:

S
Sean SavageAug 18, 2025
What to do if the output signal of Consilium ST450EC does not correspond with the expected value?
- P
  pateldanielAug 18, 2025
  If the output signal does not correspond with the expected value, consider the following: * If the gas detector is connected as a 3-wire (24Vdc/GND/Sig), connect the sensor as 2 wire (+24Vdc/Sig). * If the gas detector is not correctly calibrated, calibrate the sensing head. * If the gas detector is not correctly connected, check the connections of the sensing head. * If the sensor is not correctly connected, check the sensor connections.
W
woodssarahAug 27, 2025
How to fix a Consilium ST450EC Measuring Instruments display reading that doesn't match gas concentration?
- V
  vrandallAug 27, 2025
  If the display reading on the control module does not correspond with the applied gas concentration: * Check the SPAN gas set point and re-calibrate the gas detector if it is not correctly calibrated. * Check the sensing head connections if the gas detector is not correctly connected. * Check the sensor connections if the sensor is not correctly connected.

Consilium ST450EC Specifications

General

Accuracy	±0.5 %
Output signal	4-20 mA
Power supply	24 VDC
Housing material	Aluminium
Lining material	PTFE
Output	4-20 mA
Protection Class	IP67

Summary

IMPORTANT NOTES

GENERAL

Measuring Principle

Explains the electrochemical sensor technology and its key operational parameters.

INSTALLATION

Installation and Mounting

General rules and considerations for installing the sensing head.

Cable Requirements and Installation

Details on signal cable type, installation, glands, and shielding.

Maximum Cable Length

Factors determining and calculating the maximum permissible cable length.

Power Supply

Requirements and recommendations for the sensing head's power supply.

Electrical Connection

Wiring and connection details for the sensing head's signals and communication.

RFI (EMI)/EMC Protection

Methods to protect the sensing head and cable from electrical noise.

OPERATION

Functions

Overview of output signals (4-20mA) and MODBUS communication capabilities.

Control and LC-Display

Description of the sensing head's display, control buttons, and status LED.

User Menu - Login

How to access and navigate the user menu for settings, alarms, and calibration.

CALIBRATION

Calibration for Toxic and Oxygen Sensors

Detailed procedures for performing zero and span calibration for different sensor types.

TROUBLESHOOTING

Display and Status-LED Messages

Explains error messages on the LCD and status LED indications with their causes and solutions.

USAGE IN EXPLOSION DANGEROUS AREAS

LIABILITY IN CASE OF DAMAGES

TECHNICAL SPECIFICATIONS

PARTS AND ACCESSORIES

APPENDICES

Connection Data

Wiring diagram and connection details for the sensing head's PCB.

Gas Concentration vs. Output Signal

Table showing the relationship between gas concentration and output signal levels.

Dimensions and Mounting

Drawings showing the physical dimensions and mounting options of the sensing head.

Certificates

Details of ATEX and IECEx certifications for the ST450EC.

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