Enotec OXITEC 5000 Series

Questions and Answers

J
James BrownAug 5, 2025
What to do if O2 display remains high on Enotec Analytical Instruments?
- J
  Jean McdonaldAug 5, 2025
  If the O2 display of your Enotec Analytical Instruments remains at the end of the measuring range or is higher than expected, check all flanges and screw connections for tightness to address potential leakages at the measuring probe or the O2 sensor flange seal. Consider exchanging the O2 sensor or replacing the O2 sensor flange seal. Also, ensure the probe flange is welded gas tight by tightening flange bolts with the required torque and renewing the gasket if necessary.
D
David GlassAug 20, 2025
How to fix unsteady O2 readings on Enotec Analytical Instruments?
- C
  Cheryl BishopAug 21, 2025
  If you observe unsteady, widely varying measuring values (O2) on your Enotec Analytical Instruments, it could be due to several reasons: * Intermittent contact caused by wire breakage. Eliminate any bad or loose contacts. * Intermittent contact inside the probe - internal mV connection. * A broken filter element. Perform a visual inspection by dismounting the probe. * Wrongly installed V-shield. * Probe has been installed without filter head.
V
Vanessa JimenezAug 28, 2025
What to do if output is incorrect on Enotec OXITEC 5000?
- J
  James BrownAug 28, 2025
  If the local displays on your Enotec Analytical Instruments are correct, but the output is not, the electronic unit may be defective. Check the measuring range and determine if the current value is outside of it.
R
Richard GillespieNov 12, 2025
Why is O2 display at 0% on Enotec Analytical Instruments?
- J
  Janet PatelNov 12, 2025
  If the O2 display on your Enotec Analytical Instruments indicates 0%, despite expecting a higher value, there are several potential causes: * The measuring probe heater may be defective. Check its resistance (it should be approximately 37.5-47.5 Ohm after disconnecting the probe) and verify the measuring cell temperature (set value 800°C/1472°F). A lower temperature could cause a 0% reading. * The thermocouple might be defective. Check its resistance (approximately 2-80 Ohm) and the mV value of the O2 measuring cell. * A fuse for the heater voltage could be defective. Replace the fuse. * Cable short circuit, electronic units input defective, or wire break. Check the wiring and measure the probe cable. * The transformer (230/115V) may be defective. Check the fuse. * There may b...

Summary

Preface

Symbols in Manual

Explains symbols used for warnings, cautions, and information within the manual.

Safety Instructions

Outlines critical safety precautions for system operation, installation, and maintenance.

System Description

Measuring Principle

Details the Zirconium oxide sensor and Nernst equation for O2 measurement.

Intended Use and Safety Hazards

Defines the system's application and highlights potential hazards like hot surfaces and explosion risks.

Process Disruption and Storage

Advises on maintaining operation during process disruptions and proper storage conditions.

Name Plates

Describes information found on the device name plates, including voltage, current, and serial numbers.

Installation

Electronic Unit Installation Requirements

Specifies environmental, spatial, and electrical requirements for installing the electronic unit.

Probe Signal Cable Installation

Covers cable length, bending radius, temperature limits, and wiring for the probe signal cable.

Wiring Diagrams

Provides detailed wiring diagrams for the electronic unit and the OXITEC® 5000 analyzer system.

Probe Installation and Mounting

Details probe installation, mounting, protection tube usage, and V-shield adjustment for optimal performance.

Electrical and Pneumatic Connections

Electrical Probe Connections

Illustrates the electrical connections for the probe, detailing terminal assignments and wire colors.

Pneumatic Cable and Gas Plans

Covers pneumatic tube preparation, gas plans for instrument air and pump versions, and probe connections.

Initial Operation

Pre-Commissioning Checklist

A crucial checklist to ensure the system is ready for commissioning and operation.

System Power Up and Display Modes

Guides through system startup, language/date settings, and understanding probe heating and measuring displays.

Keypad, LEDs, and System Code

Explains the function of the keypad, status LEDs, softkey symbols, and system code security.

Software Overview and Explanations

SYS-MENU Overview

Presents a hierarchical view of the system's menu structure and available information.

O2 Measuring Ranges and Calibration Values

Explains O2 measurement scaling, averaging, and how to set calibration values like offset and slope.

Alarms, Averaging, and Error Outputs

Covers O2 limit alarms, measuring value averaging, and mA output behavior during system errors.

Calibration Settings and Automatic Calibration

Details parameters for manual and automatic calibration, including test gas application and timing.

Remote Settings, Units, and Language

ENOTEC REMOTE Configuration

Explains ENOTEC REMOTE settings, including password, range, and user management.

Units, Language, and System Code

Covers setting measuring units, language, changing the system code, and loading factory settings.

Service Functions and System Checks

Service Settings and Calibration Menu

Details service access, calibration procedures (1-point and 2-point), and display overviews.

System Checks

Guides on performing system checks for O2 sensor, mA outputs, relay outputs, and digital inputs.

Service and Maintenance

Fuse Exchange and Flow Rate Settings

Guides on replacing fuses and adjusting test/reference air flow rates for optimal performance.

Adjusting Flow Rates

Details the process of adjusting reference and test air flow rates on SME-53 and SME-54 units.

Filter Replacement Procedures

Provides step-by-step instructions for removing old filters and cementing new ones.

Probe and Sensor Replacement

Outlines procedures for replacing the entire probe assembly and the O2 sensor.

Probe Inner Parts and Relay Outputs

Probe Inner Parts Exchange

Explains how to exchange probe inner parts, including the thermocouple element.

Relay Outputs and Functions

Details the function and terminal assignments of relay outputs for system errors, maintenance, and limits.

Digital Inputs and Maintenance Intervals

Digital Inputs and Stability Criteria

Describes digital input functions, stability criteria for calibration, and mA output reaction time.

Maintenance Intervals and Extension Modules

Covers recommended maintenance intervals and optional extension modules for communication interfaces.

Status Messages

Error Messages

Lists various error messages, their causes, and potential solutions for the analyzer system.

Alarm and Maintenance Messages

Covers alarm conditions like flow issues and temperature deviations, plus maintenance messages.

Troubleshooting

Technical Data

Electronic Unit Specifications

Provides detailed technical specifications for the electronic unit, including housing, display, power, and dimensions.

Probe and Gas Supply Specifications

Details probe specifications like temperature limits and insertion depths, and instrument air supply requirements.

Dimensional Drawings

Electronic Unit Housing Dimensions

Presents detailed dimensional drawings for various electronic unit housing versions (SME-53, SME-54, GRP).

Probe and Flange Dimensions

Includes drawings and dimensions for different probe types, counter flanges, and protection tube flanges.

Spare Parts

Probe Components (KES Series)

Lists and illustrates spare parts for KES-132X, KES-200X, and KES-500X probes.

Inner Parts, Mounting Plates, and Display

Details spare parts for probe inner assemblies, electronic unit mounting plates, and display boards.

Warranty

ENOTEC Warranty Terms

Outlines ENOTEC's warranty coverage, duration, exclusions, and conditions for products.

Declaration of Conformity

EC Directives and Harmonized Standards

Lists relevant EC directives and harmonized standards that the product complies with.