Endress+Hauser CPM253-MR0005 Liquisys M pH/ORP Transmitter
01Product Identification
Endress+Hauser CPM253-MR0005 is a Liquisys M field transmitter for pH and oxidation-reduction-potential measurement. The CPM253 platform provides a compact PC/ABS field housing, one-channel operation, local display and keys, sensor and process monitoring, current output, controller functions, and modular communications or relay options.
02Key Features
Design and Functions
- The display presents the primary measured value and temperature together.
- Sensor Check System monitors pH-glass impedance where the configured sensor and software package support it.
- Process Check System can alarm when the measured signal remains unchanged for a configured period.
- Calibration plausibility checking helps identify incorrect buffer use.
- Configurable current-output curves support process scaling requirements.
- Current-input, neutralization, P(ID), limit, and cleaning functions are available according to the selected hardware and software package.
- Manual contact control and modular relays or fieldbus options support commissioning and maintenance.
Product Identity
Manufacturer: Endress+Hauser
Model: CPM253-MR0005
Product Type: Liquisys M pH/ORP Transmitter
03Engineering Data
| Manufacturer | Endress+Hauser |
|---|---|
| Order Code | CPM253-MR0005 |
| Product Family | Liquisys M CPM253 |
| Product Type | One-channel pH/ORP field transmitter |
| Sensor Environment | pH/ORP glass and ISFET sensor support within the configured CPM253 version |
| Signal Output Family | 0/4...20 mA |
| Communication Options | HART, PROFIBUS PA, or PROFIBUS DP depending on configured electronics |
| Supply Options | 100/115/230 V AC or 24 V AC/DC depending on order version |
| Power Consumption | Maximum 7.5 VA |
| Measured-Value Resolution | 0.01 pH; 1 mV or 0.1% ORP; 0.1 deg C temperature |
| Display Error | Maximum 0.5% of measuring range for pH or ORP |
| Repeatability | Maximum 0.2% of measuring range |
| Field Housing | PC/ABS |
| Sensor Cable Length | Up to 100 m for Memosens; up to 50 m for analog sensors |
| Calibration | Two-point calibration with plausibility checking |
| Process Functions | Sensor check, process check, configurable alarms, controller and cleaning functions depending on package |
04System Integration
- Confirm the exact CPM253-MR0005 order code, sensor technology, measuring cable, junction box, power supply, output, relay, and communication options.
- Record pH or ORP range, temperature compensation, calibration buffers, current scaling, alarm behavior, controller values, cleaning logic, and fieldbus address.
- Verify sensor-cable length, shielding, potential-equalization practice, enclosure mounting, cable glands, overvoltage protection, and circuit-breaker arrangement.
- Back up the device configuration and document the condition of the sensor, reference system, assembly, and process connection.
- After installation, calibrate with approved buffers and test measured value, temperature, current output, relays, communication, alarms, and cleaning functions.
05Applications
- pH or ORP monitoring in water and wastewater treatment.
- Neutralization and chemical dosing processes.
- Food and beverage, chemical, power, and primary-industry liquid analysis.
- Installed Liquisys M systems requiring the exact CPM253-MR0005 configuration.
06Lifecycle
- Match the complete CPM253-MR0005 order code and installed sensor technology before replacement.
- Record sensor model, analog or Memosens interface, cable and junction boxes, supply, outputs, relays, fieldbus, calibration buffers, temperature compensation, ranges, alarms, and controller settings.
- Do not assume every CPM253 supports every listed option; the configured hardware and software package control the available functions.
- A migration transmitter requires validation of sensor compatibility, cable, supply, outputs, relays, fieldbus, enclosure, panel or field mounting, and control logic.
- After exchange, complete sensor calibration, loop checks, relay and cleaning tests, communications checks, and process comparison against an approved reference.
FAQFrequently Asked Questions
What is
CPM253-MR0005 is an Endress+Hauser Liquisys M field transmitter for one-channel pH or ORP measurement.
Which system or application is it designed for?
It is used with a compatible configured pH or ORP sensor system in water, wastewater, chemical, food, power, and related processes.
What must be matched before ordering?
Match the complete model or article number, installed hardware revision, electrical ratings, interfaces, wiring, approvals, and project configuration.
What information should be recorded before replacement?
Record the complete order code, sensor and cable, supply, output, relays, communications, software package, calibration, compensation, alarms, controller values, and cleaning functions.
How should lifecycle or migration be handled?
Select a successor only after confirming sensor technology, wiring, fieldbus, I/O, enclosure, mounting, and control-function migration.
What should be checked after installation?
Perform calibration, temperature verification, loop scaling, alarm, relay, controller, cleaning, communication, and process-reference checks.
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