Rosemount Analytical Hx438 Operating Manual
Quick Start Guide
LIQ-QSG-Hx438, Rev A
Rosemount™ Hx438
Amperometric Steam Sterilizable Dissolved Oxygen Sensors
June 2017
Safety Information
WARNING!
Do not exceed temperature and pressure limitations of 266 °F (130 °C) and 43 psig (400 kPa, 4 bar).
WARNING!
HIGH PRESSURE AND TEMPERATURE HAZARD
Before removing the senosr, reduce the process pressure to 0 psig and cool down the process temperature.
Failure to reduce the pressure and temperature may cause serious injury to personnel.
WARNING!
The electrolyte is highly alkaline. Protect your hands with gloves and use safety goggles. Avoid contact of the electrolyte with the skin,
eyes, and mucous membranes
Contents
Contents
Chapter 1 Plan ..................................................................................................................................1
1.1 Unpacking and Inspection .............................................................................................................. 1
1.2 Specifications .................................................................................................................................1
Chapter 2 Install ...............................................................................................................................3
2.1 Preparing the sensor ...................................................................................................................... 3
2.2 Connecting the sensor to the trasmitter .........................................................................................3
2.3 Mounting the sensor ...................................................................................................................... 4
2.4 Wiring the sensor to the transmitter .............................................................................................. 5
Chapter 3 Calibration and maintenance ...........................................................................................7
3.1 Sterilizing the sensor ...................................................................................................................... 7
3.2 Dismounting the sensor ................................................................................................................. 7
3.3 Calibrating the sensor .................................................................................................................... 8
Chapter 4 Troubleshooting .............................................................................................................. 9
4.1 Maintaining the sensor ...................................................................................................................9
4.2 Replacing the electrolyte and the membrane cartridge ..................................................................9
4.3 Replacing the cathode ..................................................................................................................10
4.4 Troubleshooting .......................................................................................................................... 12
Chapter 5 Accessories .................................................................................................................... 13
Rosemount™ Hx438 Dissolved Oxygen Sensors i
Contents
ii Quick Start Guide
1 Plan
1.1 Unpacking and Inspection
1. Inspect the outside of the carton for any damage.
2. If damage is detected, contact the carrier immediately.
3. Inspect the hardware.
4. Make sure all the items in the packing list are present and in good condition.
5. Notify the factory if any part is missing.
1.2 Specifications
Rosemount Hx438 dissolved oxygen sensor specificationsTable 1-1:
Plan
Hx438 Dissolved Oxygen Sensor Material and Units
Operating Temperature Range 32 to 266 °F (0 to 130 °C)
Maximum Pressure 43 psig (400 kPa abs, 4 bar)
Measurement Range 0 to 20 ppm or 0 to 250% saturation, depending
on instrument
Wetted Materials Stainless steel and EPDM
Process Connections PG 13.5 thread
Cable Connector Standard 4-pin
Cable Compatibility Standard 4-pin connector cable
Compatible Mounting Accessory Insertion Mounting Assembly
Compatible Transmitters Rosemount Transmitter Models 56, 1056, 5081,
and 1066
Temperature Compensation 22K NTC
Rosemount™ Hx438 Dissolved Oxygen Sensors 1
Plan
2 Quick Start Guide
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