What to do if YOKOGAWA Measuring Instruments shows error E5*?
If your YOKOGAWA Measuring Instruments displays error code E5*, it indicates that the glass electrode is either coated or fouled. In this case, you should clean or replace the glass electrode. This error may also appear because of an open circuit on measurement. To resolve this, check the connections and cables.
General| Type | pH Meter |
|---|---|
| Resolution | 0.01 pH |
| Accuracy | ±0.01 pH |
| Temperature Accuracy | ±0.5 °C |
| Waterproof | Yes |
| Protection Rating | IP67 |
| pH Measurement Range | 0 to 14 pH |
| Temperature Range | 0 to 100 °C |
| Temperature Compensation | Automatic (0 to 100 °C) |
| Operating Temperature | 0 to 50 °C |
| Display | LCD |
Describes the intended use and features of the EXA PH200 transmitter in industrial environments.
Lists the essential components needed to set up a pH measurement loop with the transmitter.
Explains the identification label on the instrument and its purpose for model, serial number, and certifications.
Details general specifications including intrinsic safety, indicating range, signal, power supply, and climatic conditions.
Explains the real-time microcontroller operation, user interface, and unique FAIL-function of the EXA PH200.
Covers suitable installation sites, mounting methods, and dimensional data for the transmitter.
Provides general precautions, specific instructions for hazardous areas, liquid earth connection, and terminal access for sensor wiring.
Outlines general precautions, hazardous area considerations, power supply connection, and initial power-up procedures.
Provides a summary of maintenance, commissioning, and service routines with their respective uses and chapters.
Explains how to adjust the output signal range (4-20 mA) based on pH min/max values and provides a calculation example.
Details how to activate and use the HOLD function to freeze the output signal during maintenance or specific operations.
Covers sensor programmability, selection of electrodes and temperature sensors, and diagnostic checks like asymmetry, slope, and impedance.
Explains the process of automatic calibration using buffer solutions for accurate pH measurement and sensor slope correction.
Describes manual or process calibration using a freshly taken sample and an off-line instrument for value adjustment.
Guides the user on how to select and display various parameters like temperature, output signal, or error messages on the second line.
Explains how temperature affects pH measurement sensitivity and how the transmitter compensates for it automatically or manually.
Details the function of the HOLD output, how to activate/deactivate it, and its use during maintenance to prevent controller reactions.
Introduces the instrument's self-checking capabilities and how errors are indicated via the FAIL area and specific signals.
Lists common error codes, their possible causes, and suggested remedies for troubleshooting instrument faults.
Explains that service settings are pre-programmed defaults and advanced functions are for specific applications requiring fine-tuning.
Describes the procedure to access service settings by entering an access code to select specific functions for adjustment.
Details options for temperature compensation, unit selection (°C/°F), and enabling extra process compensation.
Guides on selecting the correct type of temperature sensor (e.g., Pt100, Pt1000) for accurate measurement.
Explains how to enable and configure checks for asymmetry, slope, and sensor impedance for diagnostics.
Allows adjustment of the display's pH resolution between 0.1 pH and 0.01 pH for optimal readability.
Configures how fault conditions are signaled, either as a "soft" alarm (flashing FAIL) or "hard" alarm (22 mA signal).
Sets the criteria for determining if a value has stabilized during calibration, preventing E02 errors.
Configures automatic return to measurement mode after a period of inactivity, preventing unintended changes during maintenance.
Allows users to program custom buffer tables for calibration, with options for different buffer IDs and temperature points.
Enables calibration for cable resistance affecting temperature measurement accuracy, by adjusting a value in a known temperature bath.
Allows manual adjustment of electrode parameters like Isothermal Point of Intersection (ITP), slope, and asymmetry potential for non-standard electrodes.
Describes how to set up password protection for Maintenance, Commissioning, and Service levels to prevent unauthorized access.
Provides an option to erase all user-programmed values and restore the instrument to its factory default settings.
Details the Cenelec classification for explosion protection (EEx ib [ia] IIC T4) and lists compatible sensor types and intrinsic safety parameters.
Outlines the FM classification for hazardous locations (Class I, Division I) and associated safety parameters, barriers, and wiring requirements.
Provides step-by-step instructions for reconfiguring the transmitter from pH to ORP measurement mode via jumper switch and service code.
Explains that ORP commissioning mirrors pH procedures but uses mV values and skips some settings, with microprocessor skipping pH-specific parameters.
Describes ORP maintenance, noting it's a one-point calibration, automatic temperature compensation is unavailable, and AUT.CAL/TEMP menus are skipped.
Discusses how process pH can influence ORP readings and how using a pH electrode as reference can mitigate this, sometimes reversing expected polarity.
Illustrates wiring diagrams for connecting ORP/REF electrodes and combined ORP/pH electrodes to the transmitter.
Lists standard buffer values for ORP and pH calibration across different reference types and temperatures, with tolerances.
Describes a feature to schedule and alert users for required maintenance, indicated by an E16 FAIL message.
Allows adjustment of the acceptable deviation for asymmetry potential, crucial for sensor condition monitoring after calibration.
Enables setting limits for sensor slope sensitivity, preventing the use of aged or contaminated sensors and triggering error E3.
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