Related Manuals for wtw MPP 350
Summary of Contents for wtw MPP 350
- Page 1 Operating manual MPP 350 Multi parameter probe for pH, dissolved oxygen, conductivity and temperature ba75434e04 03/2009...
- Page 2 Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions. © Copyright Weilheim 2009, WTW GmbH Reprinting - even as excerpts - is only allowed with the explicit written authorization of WTW GmbH, Weilheim. Printed in Germany. ba75434e04 03/2009...
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Page 3: Table Of Contents
Contents MPP 350 - Contents Overview ......... 34 Structure and function . -
Page 4: Overview
MPP 350 Overview Structure and function The MPP 350 multi parameter probe is a modularly constructed sensor for pH, dissolved oxygen, conductivity and temperature. Its maximum configura- tion comprises the following basic components: Basic module with permanently built-in conductivity measuring cell ac-... - Page 5 MPP 350 Overview Basic module Conductivity measuring cell pH electrode 5, 6 D. O. module ba75434e04 03/2009...
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Page 6: Instrument Identification
Applications in water laboratories Instrument identification A series number is printed on every module. Keep these numbers ready if you have questions to ask the WTW service department. The series numbers contain the following information: Basic module The number is imprinted on the shaft of the conductivity measuring cell. -
Page 7: Safety
The receptacle for the pH electrode is closed with a plug. MPP-Prot protective hood, mounted, with MPP-S sinker BR MPP 350 battery-powered stirrer (with cable lengths from 10 m only) Cable drum (with cable lengths from 40 m only) MPP-Cal calibration vessel for pH and conductivity ZBK 325 accessory set for D. - Page 8 TROLYTE SOLUTION AND MEMBRANE CAP 3.1.2 Set equipment The MPP 350 is also available as a set in the MPP-FC field case. You can also buy the carrying case as an accessory and fit it with components your- self. Electrodes with a cable length of up to 25 m fit in the carrying case. Or-...
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Page 9: Getting The Sensor Ready For Measuring
The sealing should always be slightly greased (with the O ring grease of the pH electrode). CAUTION Never operate the MPP 350 without the protective hood. The protective hood fixes the pH electrode or plug in the electrode receptacle and guarantees a pres- sure-resistant sealing. - Page 10 Commissioning MPP 350 3.2.3 Mounting the D. O. module Make sure that the D.O. module and conductivity measuring cell are screwed together tightly. When mounted, the cap nut of the D.O. module has to be screwed on up to the stop.
- Page 11 Remove the watering cap (4). Screw on the protective hood. CAUTION Never operate the MPP 350 without the protective hood. The protective hood fixes the pH electrode or plug in the electrode receptacle and guarantees a pres- sure-resistant sealing. It especially protects the pH electrode from mechanical damage.
- Page 12 Commissioning MPP 350 3.2.5 Plugging and unplugging the connection cable First plug the main cable with the 8-pin plug in the instrument, then the pH plug. Always unplug the pH plug first, then the main cable with the 8-pin plug.
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Page 13: Measuring / Operation
MPP 350 Measuring / Operation Measuring / Operation Calibration 4.1.1 Calibrating for D. O. measurement ® To calibrate the D.O. module, use the OxiCal -MPP calibration and storage vessel (white). It is screwed on the sensor instead of the protective hood. -
Page 14: Measuring
Use a flow aid, e. g. a magnetic stirrer or the battery-powered stirrer, BR MPP 350. The battery-powered stirrer BR MPP 350 also serves as a protective hood at the same time and is screwed on instead of the stan- dard protective hood. -
Page 15: Maintenance, Cleaning, Replacement
MPP 350 Maintenance, cleaning, replacement Maintenance, cleaning, replacement General maintenance instructions For your safety Note the following safety instructions when handling electrolyte and cleaning solutions: CAUTION The ELY/G electrolyte solution and the RL/G cleaning solution irritate the eyes and skin. Observe the following points when handling the so-... -
Page 16: Outside Cleaning
Maintenance, cleaning, replacement MPP 350 Outside cleaning Basic module and Contamination Cleaning procedure D.O. module Lime sediments Immerse in acetic acid (volume share = 10 %) for 1 minute Fat/oil Clean with warm water that contains wash- ing-up liquid After cleaning, thoroughly rinse with deionized water and recalibrate if necessary. -
Page 17: Module: Changing The Electrolyte Solution And Membrane
ENERAL MAIN on page 45. TENANCE INSTRUCTIONS General WTW delivers the D.O. module ready to use (see section 3). The electrolyte information solution and membrane cap must only be replaced if: a calibration error occurs and the membrane is heavily contaminated the membrane is damaged the electrolyte solution is exhausted. - Page 18 Maintenance, cleaning, replacement MPP 350 Carefully shake off the drops Fill a new membrane cap with Remove any air bubbles by of water. ELY/G electrolyte solution. carefully tapping the mem- brane cap. Additionally, you can prevent air bubbles by throwing the first filling away and refilling the membrane cap.
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Page 19: D.o. Module: Cleaning The Electrodes
MPP 350 Maintenance, cleaning, replacement D.O. module: Cleaning the electrodes CAUTION Before starting to work with the sensor, please note the G ENERAL MAIN on page 45. TENANCE INSTRUCTIONS General Cleaning is only required in cases of slopes too small or too large (sensor... - Page 20 Maintenance, cleaning, replacement MPP 350 Thoroughly rinse the sensor Water the counter electrode in Carefully shake off the drops head with deionized water. deionized water for at least of water. 10 minutes. Fill a new membrane cap with Remove any air bubbles by Rinse the sensor head with ELY/G electrolyte solution.
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Page 21: Checking The D.o. Module For Freedom From Zero-Current
MPP 350 Maintenance, cleaning, replacement Note For measurements under high pressure the filling must be completely free of air bubbles. Readiness to mea- After approx. 30 to 50 minutes, the sensor is ready for operation. Subse- sure quently calibrate the sensor. -
Page 22: Disposal
Maintenance, cleaning, replacement MPP 350 Disposal CAUTION The ELY/G electrolyte solution irritates eyes and skin. When dealing with the ELY/G electrolyte solution, observe the following points: During working activities, always wear suitable protective gloves and protective goggles/face shield. If it comes into contact with the skin, rinse thoroughly with water and immediately change contaminated clothing. -
Page 23: What To Do If
– Return the sensor Measured values implau- – Incident flow insufficient – Move the sensor in the test sible sample (stirr) or use the battery- powered stirrer, BR MPP 350 Mechanical damage to – Return the sensor the sensor ba75434e04 03/2009... -
Page 24: Error Symptoms Of Conductivity Measurement
What to do if... MPP 350 Error symptoms of conductivity measurement Error symptom Cause Remedy No temperature or con- – No connection between meter and – Check connection between meter ductivity display sensor and sensor – Cable defective – Return the sensor Measurement delivers –... -
Page 25: Technical Data
MPP 350 Technical data Technical data Basic module with conductivity measuring cell General features Measuring principle Four-electrode measurement Cell constant 0.475 cm ±1.5 % Temperature sensor integrated NTC 30 (30 k at 25 °C / 77 °F) 287.5 Dimensions (in mm) 41.5... - Page 26 IP 68 (10 Pa or 10 bar) resistance connection Cable plug IP 67 (when plugged in) The MPP 350 meets the requirements according to article 3(3) of the 97/23/EC directive ("Pressure equipment directive"). Measurement Conductivity measuring 1 µS/cm ... 2 S/cm conditions...
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Page 27: Dissolved Oxygen (D.o.) Module
MPP 350 Technical data Dissolved oxygen (D.O.) module General features Measuring principle Membrane covered galvanic sensor Temperature compensation IMT compensation (calculated by the meter) Dimensions (in mm) Weight approx. 20 g (filled with electrolyte) Materials Working electrode Gold Counter electrode Lead –... - Page 28 Technical data MPP 350 Measurement Measuring ranges at 20 °C 0 ... 50 mg/l D.O. conditions (68 °F) 0 ... 600 % D.O. saturation 0 ... 1250 mbar D.O. partial pressure Polarization time min. 30 ... 50 min after changing the electro-...
- Page 29 MPP 350 Technical data Pin assignment MPP circuit board pH plug pH socket Oxi plug-in connection Shield MPP conductivity sensor 8-pin plug Shield NTC+/Cod NTC+ NTC- 30 kW NTC- Shield Plug from the front: ba75434e04 03/2009...
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Page 30: Wear Parts And Accessories
TEP 4 108 700 TEP 7 108 702 TEP 10 Trace 108 703 Calibration and control standard E-SET 300 572 KCl 0.01 mol/l (6 x 50 ml) Note For further accessories, refer to the WTW catalog or the Internet. ba75434e04 03/2009... - Page 32 Wissenschaftlich-Technische Werkstätten GmbH Dr.-Karl-Slevogt-Straße 1 D-82362 Weilheim Germany Tel: +49 (0) 881 183-0 +49 (0) 881 183-100 Fax: +49 (0) 881 183-420 E-Mail: Info@WTW.com Internet: http://www.WTW.com...