Enotec COMTEC 6000 DustEx

Questions and Answers

P
pjenningsAug 2, 2025
What to do if the O2 display on my Enotec Measuring Instruments remains at the end of the measuring range or is higher than expected?
- M
  Melissa SchultzAug 2, 2025
  If the O2 display remains at the end of the measuring range or is higher than expected, it could be due to leakages at the measuring probe or the O sensor flange seal. Check all flanges and screw connections to ensure they are tight. If there's a leakage around the O sensor, replace the O sensor or the O sensor flange seal. Another cause may be that the probe flange is not welded gas tight, in this case, tighten the flange bolts with the required torque and renew the gasket if necessary.
S
shepherddonaldAug 6, 2025
Why is the measuring value (O2) unsteady and widely varying on my Enotec Measuring Instruments?
- C
  Charles RomeroAug 6, 2025
  An unsteady, widely varying measuring value (O2) can be caused by several factors: * Intermittent contact due to wire breakage. Solution: Eliminate bad/loose contact. * Intermittent contact inside the probe (internal mV connection). * A broken filter element. Solution: Perform a visual inspection by dismounting the probe. * Wrongly installed V-shield. * The probe has been installed without a filter head.
U
ubryantAug 15, 2025
What should I do if the local displays are correct, but the output is not correct on my Enotec Measuring Instruments?
- R
  Richard HayesAug 15, 2025
  If the local displays are correct but the output is not, it could be due to a defective electronic unit. Check the measuring range and see whether the current value is outside of it. Also, measure the mA output on the strip terminal.
R
Roger SandersAug 19, 2025
Why does O2 read higher than expected, and COe reads lower than expected on my Enotec Measuring Instruments?
- N
  Nancy HendersonAug 19, 2025
  This may be due to a poor seal of the COe sensor coupling located in the terminal box housing. If the stainless steel nut is not tight enough the O-ring seal allows ambient air to enter into the COe senor mounting tube which influences the sensors readings. Tighten or replace the COe sensor coupling assembly.
P
Patrick MartinezAug 23, 2025
What does it mean if there is no COe-Measuring Value and an arrow instead of a value on Enotec Measuring Instruments?
- A
  Alexandria Brown MDAug 23, 2025
  If there is no COe-Measuring Value and an arrow is displayed instead of a value, this indicates that the physical measuring range has been exceeded. Perform a O + COe sensor check. Alternatively, an error may have occurred with the COe sensor, in which case you should check all electrical connections.
J
Julia WilsonAug 28, 2025
What causes no measuring value for O2 and an empty bar graph on my Enotec Measuring Instruments?
- E
  Elaine SteinAug 28, 2025
  If there is no measuring value for O2 and an empty bar graph is displayed, the O2 value may be outside the coverage of the electronic unit, possibly due to a low O2 concentration combined with a high COe concentration. To resolve this, perform an O + COe sensor check.
A
Aimee MontesNov 10, 2025
What to do if O2 Display Indicates 0 % on Enotec Measuring Instruments, although the Process Operation Mode expects a higher O2 Value?
- C
  cindywallsNov 10, 2025
  If the O2 display indicates 0% when a higher value is expected, several issues could be the cause: 1. The measuring probe heater may be defective. Check the resistance (it should be approximately 37.5-47.5 Ohm after disconnecting the probe). Also, check the measuring cell temperature (set value 800°C/1472°F), as a lower temperature could cause a 0% reading. 2. The thermocouple could be defective. Check its resistance, which should be around 2-80 Ohm. Also, check the mV value of the O2 measuring cell. 3. The fuse for the heater voltage might be defective; replace it. 4. There could be a cable short circuit, a defective electronic unit input, or a wire break. Check the wiring and measure the probe cable. 5. The transformer (230/115V) may be defective. Check the fuse. 6. There might be...

Enotec COMTEC 6000 DustEx Specifications

General

Power Supply	24 VDC
Protection Class	IP65
Data Storage	Internal memory for data logging
Measuring Principle	Optical scattering
Accuracy	±2% of reading
Output Signal	4 - 20 mA
Storage Temperature	-20 °C to +70 °C
Display	LCD display

Summary

Preface

Notes concerning this Manual

Information about the manual's content, safety, and maintenance.

Symbols used in this Manual

Explains symbols used for warnings, information, and protection.

Safety Instruction

Critical safety information for operating the analyzer system.

System Description

Distinction between COMTEC; OXITEC DustEx

Highlights differences between COMTEC (O2/COe) and OXITEC (O2 only) systems.

System Overview

Provides a visual overview of the system components and connections.

Measuring principle

Explains the zirconium oxide principle for O2 and catalytic oxidation for COe.

Intended use

Specifies the applications for the analyzer and prohibited uses.

Safety Hazards

Warns about potential dangers associated with the system.

Disruption of the Process

Advises on keeping the analyzer operational, even during process disruptions.

ATEX certification

Details ATEX certification information, including temperature limits and markings.

Storage instructions

Provides guidelines for storing ENOTEC equipment and spares.

Name Plates

Explains information found on the system's nameplates.

Installation

Installation Requirements for Electronic Unit

Specifies mounting, environmental, and electrical connection requirements for the unit.

Installation Requirements for Probe Cable

Details requirements for installing the probe cable, including shielding and bending radius.

Access to the Terminals

Instructs on safely accessing and connecting wires to the terminal board.

Fitting of Ferrite Sleeves

Explains the importance of fitting ferrite sleeves for CE conformity.

Wiring Diagram of the Electronic Unit

Illustrates the electrical connections for the electronic unit.

Electrical Wiring Diagram - OXITEC DustEx

Shows the specific wiring diagram for the OXITEC 5000 DustEx O2 analyzer.

Electrical Wiring Diagram - COMTEC DustEx

Shows the specific wiring diagram for the COMTEC 6000 DustEx O2/COe analyzer.

Installation of the probe

Provides instructions and warnings for installing the probe in the duct.

Mounting of the Counter Flange at the Duct

Details the process for mounting the counter flange to the duct wall.

Adjusting the V-shield

Explains how to position the V-shield for optimal flue gas flow.

Mounting of the Probe

Covers mounting the probe, using new gaskets, and ensuring insulation.

Electrical Connections of the Probe

Shows the terminal connections within the probe's connection box.

Requirements for Pneumatic Cable FEP-0002

Specifies bending radius and temperature requirements for the pneumatic cable.

Preparation of the pneumatic cable

Illustrates how to prepare the pneumatic tubes with nuts and clamp rings.

Pneumatic Connections of the Probe

Details the pneumatic connections at the probe for reference air and test gas.

Pneumatic Connections of the Electronic Units

Shows the pneumatic connections on the bottom and back of the electronic units.

Initial Operation

Checklist before commissioning the system

A checklist to ensure the system is ready for operation.

System Power Up

Steps for powering up the system and initial configuration prompts.

Display - Probe Heating Phase

Describes the display during the probe's heating phase.

Display - Measuring Mode

Explains the display screen during normal measurement operation.

Keypad and Display

Details the components of the keypad and display interface.

Status LEDs

Explains the meaning of the different colored status LEDs.

Softkey Symbols

Describes the symbols used for softkey functions.

System Code

Manages the system access code for security.

Menu Overview and Explanations

Menu Overview - SYS-MENU

Provides a hierarchical view of the system menu structure and options.

Menu Explanations - SYS-MENU

Detailed explanations for specific system menu items and their functions.

System Checks

Performs checks on sensors, mA outputs, relay outputs, and digital inputs.

CAL MENU

Provides options for manual sensor calibration procedures.

1-point calibration (O2 and;or COe) (manual)

Details the steps for performing a single-point calibration for O2 or COe.

2-point calibration (O2 and;or COe) (manual)

Details the steps for performing a two-point calibration for O2 or COe.

Service and Maintenance

Exchange fuses

Instructions for safely replacing system fuses.

Flow Rates for Test Air and Reference Air

Specifies recommended flow rates for test and reference air.

Adjusting Flow Rate (SME 53 with integrated Pneumatics)

Guides on adjusting test and reference air flow rates for the SME 53 unit.

Position of the adjustment valves

Identifies the location of adjustment valves for air flow.

Adjusting Flow Rate (SME-54)

Guides on adjusting test and reference air flow rates for the SME-54 unit.

Replacing the Filter Head

Step-by-step instructions for replacing the probe's filter head.

Replacing the probe

Detailed procedure for removing and installing a new probe.

Exchange of Probe Inner Parts

Instructions for replacing internal components within the probe.

Replacing the O2 Sensor

Step-by-step guide for replacing the O2 sensor.

Replacing the COe Sensor (COMTEC)

Instructions for replacing the COe sensor in COMTEC systems.

Seal the COe sensor guide tube

Guidance on sealing the COe sensor guide tube to prevent false air intake.

Relay Outputs; Functions and Correlations

Explains the functions and terminal assignments of system relays.

Digital Inputs

Describes the function and voltage requirements of digital inputs.

Stability Criteria for Calibration

Outlines the criteria for checking cell stability during calibration.

Reaction Time of the mA Output

Specifies the reaction time of the mA output to input voltage changes.

Extension Modules

Information on optional interface modules like RS232, RS485, HART, Fieldbus.

Maintenance Intervals

Recommends maintenance frequency based on process conditions.

Status Messages

Error Messages

Lists and explains various error messages and their possible causes.

Alarm Messages

Lists and explains alarm messages and their potential causes.

Service Messages

Explains service messages and their implications.

Heater Control Unit

Details the function and error signaling of the heater control unit.

Troubleshooting

Unsteady, widely varying measuring value (O2)

Addresses issues with fluctuating O2 measurement values and their causes.

O2 display remains at the end of the measuring range or is higher than expected

Troubleshoots scenarios where O2 display is stuck at the max range or higher.

Local Displays correct, Output not correct

Diagnoses issues where local display is fine but output is incorrect.

O2 Display Indicates 0%, although the Process Operation Mode expects a higher O2 Value

Guides on troubleshooting a 0% O2 reading when a higher value is expected.

O2 reads higher than expected, and COe reads lower than expected

Addresses discrepancies between O2 and COe readings.

No COe-Measuring Value; Arrow instead of a value

Troubleshoots the absence of COe measurement values.

No Measuring Value for O2; empty Bar Graph

Guides on troubleshooting missing O2 measurement values.

Technical Data

Electronic Unit

Provides detailed technical specifications for the electronic unit.

Probe

Details technical specifications for the probe, including temperature and pressure limits.

Requirements for the Gas Supply

Specifies requirements for instrument air and test gas supplies.

Dimension Drawings

Dimensions of the Electronic Units

Shows dimensional drawings for different electronic unit housings.

Probe Dimensions

Provides dimensional drawings for KES6001 and KES6002 probes.

Counter Flange Dimensions

Shows dimensional drawings for ADP-6007 and ADP-6007-S01 counter flanges.

Probe Components

Illustrates and lists the components of the KES600X80000 probe.

Gas plan

Depicts pneumatic schematics for instrument air and pump versions.

Spare Parts

Mounting Plates of the electronic Unit

Lists spare parts for mounting plates of the electronic unit.

Display Board

Lists part numbers for various display boards.

Warranty

Declaration of Conformity

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Table of Contents