Endress+Hauser Transmitter ССМ253-A2B2K1

- Replacing the central module:

Generally, when a central module has been replaced, all data which can be changed are set to the factory setting.

If possible, note the customized settings of the device, such as:

• Current assignment, main parameter and temperature

• Limit value/controller settings

WARNING! Process pressure and temperature, contamination, electrical voltage Risk of serious or fatal injury

If the sensor has to be removed during maintenance work, avoid hazards posed by pressure, temperature and contamination.

Make sure the device is de-energized before you open it.

Power can be supplied to switching contacts from separate circuits. De-energize these circuits before working on the terminals.

Take all the necessary precautions in time to ensure the operational safety and reliability of the entire measuring point.

The maintenance of the measuring point comprises: Calibration, Cleaning the controller, assembly and sensor, Checking the cables and connections

When performing any work on the device, bear in mind any potential impact this may have on the process control system or on the process itself.

NOTICE Electrostatic discharge (ESD) Risk of damaging the electronic components

Take personal protective measures to avoid ESD, such as discharging beforehand at PE or permanent grounding with a wrist strap.

pH/ORP measurement: Simulation is performed with a pH/mV simulator or an mV voltage source. In the case of the CCM223/253, the pH or mV must always be measured symmetrically. For this reason, each simulation requires potential matching with the simulator. Connect the reference signal of the simulator (normal shield of the pH coaxial measuring line) to the PA/PM terminal of the transmitter.

Zero Point Rapid Test: • In the case of the panel-mounted device, connect the BNC inner conductor to the BNC receptacle and the PM terminal. • In the case of the field device, connect the pH terminal, the Ref terminal and the PM terminal. • For pH the reading must be approx. 7, and for ORP approx. 0 mV.

Select the pH value for simulation

Enter the simulation reading in mV

WARNING! Process pressure and temperature, contamination, electrical voltage Risk of serious or fatal injury

If the sensor has to be removed during maintenance work, avoid hazards posed by pressure, temperature and contamination.

Make sure the device is de-energized before you open it.

Power can be supplied to switching contacts from separate circuits. De-energize these circuits before working on the terminals.

Take all the necessary precautions in time to ensure the operational safety and reliability of the entire measuring point.

The maintenance of the measuring point comprises: Calibration, Cleaning the controller, assembly and sensor, Checking the cables and connections

When performing any work on the device, bear in mind any potential impact this may have on the process control system or on the process itself.

NOTICE Electrostatic discharge (ESD) Risk of damaging the electronic components

Take personal protective measures to avoid ESD, such as discharging beforehand at PE or permanent grounding with a wrist strap.

WARNING! Process pressure and temperature, contamination, electrical voltage Risk of serious or fatal injury

If the sensor has to be removed during maintenance work, avoid hazards posed by pressure, temperature and contamination.

Make sure the device is de-energized before you open it.

Power can be supplied to switching contacts from separate circuits. De-energize these circuits before working on the terminals.

Take all the necessary precautions in time to ensure the operational safety and reliability of the entire measuring point.

NOTICE Electrostatic discharge (ESD) Risk of damaging the electronic components

Take personal protective measures to avoid ESD, such as discharging beforehand at PE or permanent grounding with a wrist strap.

For your own safety, only use genuine spare parts. With genuine parts, the function, accuracy and reliability are also ensured after maintenance work.