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4.1

Sensor Removal

Remove the sensor from the ball valve as follows:

1.

Be certain system pressure at the sensor is below 64 psig (542 kPa) before proceeding 

with the retraction. It is also recommended that the personnel wear a faceshield and have

a stable footing.

2.

Push in on the sensor using the top of the J-box and slowly loosen the hex nut (B) of the 

process end male connector (A). (Refer to Figure 4-2).

3.

When  the  hex  nut  is  loose  enough,  slowly  ease  the  sensor  back  completely  until  the 

retraction stop collar is reached.

4.

Close the ball valve slowly. If there is resistance it may be hitting the sensor. Double check

that the sensor has been retracted to the retraction stop collar.

5.

The Male Connector Body (A) may now be completely unthreaded from the reducing 

coupling and the sensor removed for servicing.

Note:

With the ball valve fully closed, some residual process fluid may leak from the connectors

MNPT pipe threads. This leakage is normal and to be expected.

4.2

Sensor Maintenance

4.2.1

Electrode Cleaning

If the electrode is coated or dirty, clean as follows: 

1.

Remove the sensor from process as previously instructed in Section 4.1.

2.

Wipe the glass bulb with a soft, clean, lint free cloth or tissue. If this does not remove the

dirt or coating, go to Step 3. (Detergents clean oil and grease; and acids remove scale.)

3.

Wash the glass bulb in a strong detergent solution and rinse it in clean water. If this does

not clean the glass bulb, go to Step 4.

Section 4:  Maintenance

WARNING

System pressure may cause the sensor to blow out with great force unless care is taken during removal. 

Make sure the following steps are adhered to.

Failure to withdraw the sensor completely may result in damage to the sensor when the valve is closed.

CAUTION

WARNING

Before removing the sensor from the ball valve, be absolutely certain that the ball valve is fully closed. 

Leakage from the male connector threads may indicate that the male connector is still under pressure. 

Leakage through a partially open valve could be hazardous.

Maintenance

13

Reference Manual

Maintenance

00809-0100-3385

February 2019

Содержание Rosemount 385

Страница 1: ...Rosemount 385 pH ORP Sensors Reference Manual 00809 0100 3385 Rev AA February 2019 ...

Страница 2: ...hasgkas ...

Страница 3: ...thorized parts and procedures can affect the product s performance place the safe operation of your process at risk and VOID YOUR WARRANTY Third party substitutions may result in fire electrical hazards or improper operation Ensure that all equipment doors are closed and protective covers are in place except when maintenance is being performed by qualified persons to prevent electrical shock and p...

Страница 4: ......

Страница 5: ...nd Calibration 3 1 Startup 11 3 2 Calibration Using Buffer Solutions or Grab Samples 11 3 3 Rosemount 385 ORP Calibration 11 Section 4 Maintenance 4 1 Sensor Removal 13 4 2 Sensor Maintenance 13 4 3 Sensor Tube Replacement 16 4 4 Rosemount 385 ORP 18 Section 5 Troubleshooting 5 1 Troubleshooting 19 Section 6 Accessories 6 1 Accessories 21 EC Declaration of Conformity 23 Intrisicallly Safe Sensor I...

Страница 6: ...Table of Contents Reference Manual February 2019 00809 0100 3385 ii Table of Contents ...

Страница 7: ... 2 in ball valve This makes it ideal for replacing or updating any manufacturer s existing retractable pH ORP sensor without process shut down Initial installations can even be accomplished without process shut down by hot tapping a 1 1 2 in ball valve at the desired point of measurement Sensor removal is accomplished by retracting the sensor until it reaches the built in retraction stop collar no...

Страница 8: ...ature 100 psig 790 kPa abs at 100 C Temperature Compensation 0 to 100 C 212 F Wetted Materials Tefzel titanium Viton Teflon a 316 stainless steel compression fitting with EPDM glass and ceramic Repeatability 0 05 pH Interconnecting Cable P N 9200000 Electrical Classification General Purpose Process Connections FNPT ball valve 1 1 2 in MNPT with only male connector 1 in Weight Shipping With Ball Va...

Страница 9: ...0 For Rosemount 1054 1054A B ORP 07 3k TC For Rosemount 1181 pH 1050 1003 08 Pt 100 For Rosemount 1054 1054A B pH 2054 pH and 2081 Combination Electrode 10 pH GPLR Glass 11 High pH Glass 12 ORP Preamplifier 51 Integral Preamplifier for use with Rosemount 1003 1023 52 No Preamplifier for use with Rosemount 1181 pH ORP 1050 1060 and 1003 1023 53 No Preamplifier for use with Rosemount 1054 1054A 1054...

Страница 10: ...60 C Nonincendive for use in Class I Division 2 Groups A B C and D Temperature Class T6 Ta 20 C to 60 C Suitable for use in Class II and III Division 2 Groups E F and G Temperature Class T6 Ta 20 C to 60 C Hazardous Classified Locations IS I II III 1 ABCDEFG T6 Ta 60 C 1400332 Entity I 0 AEx ia IIC T6 Ta 60 C 1400332 Entity NI I 2 ABCD T6 Ta 60 C S II III 2 EFG T6 Ta 60 C Per standards 3600 1998 3...

Страница 11: ...bbles out of the pH sensitive glass bulb Bubbles settled in the glass bulb disrupt the electrical continuity between the pH sensitive glass and the silver silver chloride measuring element 2 2 1 Installing the Sensor 1 If the sensor is inserted directly into the process without a ball valve go to Step 2 Carefully remove the rubber boot which protects the glass electrode and keeps the liquid juncti...

Страница 12: ...ut clamps the sensor tube See Figure 4 3 The sensor must be captured by the valve assembly and the male connector so that it cannot be blown free by process pressure if mishandled during insertion or retraction CAUTION Over tightening the hex nut may damage the ferrule CAUTION A stainless steel ferrule is available if the TEFLON ferrule does not inadequately grip When using the metallic ferrule ca...

Страница 13: ...Installation 7 Reference Manual Installation 00809 0100 3385 February 2019 Figure 2 2 Dimensional Drawing ...

Страница 14: ... four conductor shielded instrument cable such as Belden 8722 This is available from Rosemount as Part Number 9200000 3 Maximum sensor to analyzer distance is Integral preamplifier in sensor 1054 1054A pH ORP 1054B pH ORP and 2054 pH 1000 ft 1181 pH ORP 1050A 1060A 1003 1023 1 mile with standard cable 4 Signal cable should be run in a dedicated conduit and should be kept away from AC power lines F...

Страница 15: ...Installation 9 Reference Manual Installation 00809 0100 3385 February 2019 Figure 2 4 Wiring Details for Option 53 ...

Страница 16: ...10 Installation Installation Reference Manual February 2019 00809 0100 3385 ...

Страница 17: ...n first set up or after being cleaned 3 3 1 ORP Calibration 1 Make a temporary electrical connection between the sensor and the instrument 2 Obtain a standard solution of saturated quinhydrone 4 pH or 7 pH This can be made quite simply by adding a few crystals of quinhydrone to either pH 4 or pH 7 buffer Quin hydrone is only slightly soluble so only a few crystals will be required The resulting so...

Страница 18: ...Startup and Calibration Reference Manual February 2019 00809 0100 3385 12 Startup and Calibration ...

Страница 19: ...l and to be expected 4 2 Sensor Maintenance 4 2 1 Electrode Cleaning If the electrode is coated or dirty clean as follows 1 Remove the sensor from process as previously instructed in Section 4 1 2 Wipe the glass bulb with a soft clean lint free cloth or tissue If this does not remove the dirt or coating go to Step 3 Detergents clean oil and grease and acids remove scale 3 Wash the glass bulb in a ...

Страница 20: ...6 2 or the following formula RT R0 l R1 T 20 Where RT Resistance T Temperature in C Refer to Table 4 1 for R0 and R1 values The solution used in the following step is an acid and should be handled with care Follow the directions of the acid manufacturer Wear the proper protective equipment Do not let the solution come in contact with skin or clothing If contact with the skin is made immediately ri...

Страница 21: ...e to read 7 0 pH or zero 0 millivolts replace the old pream plifier with a new one and perform the check again Note For other Rosemount transmitters refer to their respective Reference Manuals for input checks etc 4 2 4 Preamplifier Replacement If the preamplifier is defective replace as follows 1 Unscrew and remove the junction box cover 2 Disconnect the BNC connector and the four pin connector f...

Страница 22: ...sor and set aside for reuse Remove hex nut D and set aside for reuse Check that the internal O ring is in place in the male connector body C attached to the junction box 3 Remove hex nut B from male connector body A at process end of sensor and set aside Slide the Teflon ferrule and the male connector off sensor in the direction of junction box and set aside Discard sensor tube 4 Discard used O ri...

Страница 23: ...e sensor If sensor tube is not correctly attached to the junction box loosen hex nut D and repeat 8 Connect the sensor wires to the terminals on the printed circuit board in the junction box in the manner recommended on the junction box cover or see Figure 2 3 Reattach the BNC connector to the preamp Screw on the cover of the junction box 9 Insert the sensor in the process fitting Stop it against ...

Страница 24: ... is much more stable and will maintain its millivolt value for approximately one year when stored in glass containers This solution ferric ferrous ammonium sulfate will produce a nominal ORP of 476 20 mV at 25 C when used with a saturated KCl AgCl reference electrode and platinum measuring electrode Some tolerance in mV values is to be expected due to the rather large liquid reference junction pot...

Страница 25: ...Replace sensor tube Meter or display indication swings or jumps widely in AUTO T C Mode T C element shorted Check T C element as instructed in Section 4 2 2 and replace sensor tube if defective Span between buffers extremely short in AUTO T C Mode T C element open Check T C element as instructed in Section 4 2 2 and replace sensor tube if defective Sluggish or slow meter indication for real change...

Страница 26: ...20 Troubleshooting Troubleshooting Reference Manual February 2019 00809 0100 3385 ...

Страница 27: ...9 23239 06 Kit ORP Sensor Tube w No TC Titanium Code 04 12 P N 23288 12 23239 07 Kit ORP Sensor Tube w PT 100 TC Titanium Code 06 12 P N 23288 13 23239 08 Kit pH Sensor Tube w 3K TC Titanium High pH Code 07 11 P N 23288 16 23239 09 Kit pH Sensor Tube w PT 100 TC Titanium High pH Code 08 11 P N 23288 17 33046 00 Ferrule 1 316SS Split for J Box 9200000 Cable 20 Ga 4 Cond 1 Shielded Pair Belden 8722 ...

Страница 28: ...22 Accessories Accessories Reference Manual February 2019 00809 0100 3385 ...

Страница 29: ...EC Declaration of Conformity 23 EC Declaration of Conformity Note Please see website for most recent Declaration Reference Manual EC Declaration of Conformity 00809 0100 3385 February 2019 ...

Страница 30: ...24 EC Declaration of Conformity EC Declaration of Conformity Reference Manual February 2019 00809 0100 3385 ...

Страница 31: ...Reference Manual EC Declaration of Conformity 00809 0100 3385 February 2019 EC Declaration of Conformity 25 ...

Страница 32: ...26 China RoHS Table China RoHS Table Reference Manual February 2019 00809 0100 3385 ...

Страница 33: ...UI PM ENT CO NNECTED TO THE ASSO CI ATED APPARATUS M UST NO T USE O R GENERATE M O RE THAN 250V RESI STANCE BETW EEN I NTRI NSI CALLY SAFE GRO UND AND EARTH GRO UND M UST BE LESS THAN O R EQ UAL TO 1 O HM ANY FM APPRO VED TRANSM I TTER FO R DI VI SI O N 1 W I TH I NTRI NSI CALLY SAFE O UTPUT PARAM ETERS THI S FM APPRO VED DEVI CE M UST BE I NSTALLED PER I TS I NSTALLATI O N DRAW I NG FM APPROVED E...

Страница 34: ...es All other marks are the property of their respective owners The contents of this publication are presented for information purposes only and while effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and condit...

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