Rosemount Analytical Hx348 Operating Manual
Instruction Sheet HxpH pH Sensor
LIQ_MAN_ABR_HxpH March 2014
pH Sensors
Specications
pH Range: 2 to 12 (0 to 14 short periods)
Temperature: -10 to 135 °C (14 to 275 °F)
Maximum Pressure: 58 psig (600 Pa abs, 4 bar)
Wetted Materials: Glass and EPDM
Process connections:
Hx338: PG 13.5 thread
Hx348: none
Cable Connector: S7 connector plug, single pole or VP
Variopol connector
Cable Compatibility: any AS7 connector plug, single
pole; or VP Variopol connector
Compatible Mounting Accessory:
Hx338: Insertion or Retraction Mounting Assembly
Hx348: Pressurized Mounting Assembly
Figure 1. pH Sensors
WARNING
Do not exceed temperature and pressure limitations of 130 °C (266 °F) and 72 psig (600 kPa, 6 bar).
CAUTION
Internal electrolyte ll solution may cause skin or eye irritation.
WARNING
Before removing the sensor, be absolutely certain that the process pressure is reduced to 0 psig and the process temperature is
lowered to a safe level!
CAUTION
SENSOR/PROCESS APPLICATION COMPATIBILITY
The wetted sensor materials may not be compatible with process composition and operating conditions. Application
compatibility is entirely the responsibility of the user.
CAUTION
Hydrouoric acid and the mixture of Hydrochloric acid and thiourea is toxic and highly corrosive. Avoid skin contact, wear
protective gloves. Use only in a well ventilated area. Do not inhale fumes. In case of an accident, consult a doctor immediately.
HxpH pH Sensor Instruction Sheet
March 2014 LIQ_MAN_ABR_HxpH
Storage
1. It is recommended that electrodes be stored in their original shipping containers until needed.
2. Do not store at temperatures below -5 °C (23 °F).
3. Electrodes should be stored with a protective cap containing KCI solution (PN 9210342).
4. For overnight storage, immerse the sensor in tap water or 4 pH buffer solution.
5. pH glass electrodes slowly deteriorate in storage. There is no specic expiration date. However the calibration
procedure described on page 4 should be followed to determine that the sensors calibrate properly.
Electrode preparation
1. Remove electrode from shipping container.
2. Remove the protective boot covering the electrode bulb.
3. Rinse away salt lm with clean water, then shake the electrode so that the internal solution lls the bulb, thus
removing any air trapped there.
Note
Do not allow lubricant coat electrode bulb or reference junction. If it does, wipe it clean before installation.
Installation
For sensor orientation, see Figure 3.
For wiring, see see Figures 4 through 10.
Figure 2. Hx338 Dimensional Drawing
Sensor
Part Number
Hx338-01 120 4.725
Hx338-02 225 8.859
Hx338-03 325 12.796
Hx338-04 400 15.749
Hx338-05 425 16.733
A Dimension
mm inch
VP 6.0 PLUG
SW17 FREE SPINNING PG 13.5 THREAD
VP 6.0 PLUG
VP 6.0 PLUG
2
Instruction Sheet HxpH pH Sensor
LIQ_MAN_ABR_HxpH March 2014
Figure 3. Hx348 Dimensional Drawing
Figure 4. Sensor Orientation
Sensor
Part Number
Hx348-01 – 11/12 120 4.73
Hx348-02 – 11/12 150 5.91
Hx348-03 – 11/12 200 7.88
Hx348-04 – 11/12 250 9.85
A Dimension
mm inch
3
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