SENTRON Stream-Line probe series User manual
Contents
1. longer white Cleaning Put the probe in soapy water with a constant temperature of 60 C for minimal 5 minutes Then start cleaning the probe with the toothbrush After this the probe must be placed in a KCl solution with a temperature of 20 C for 1 2 hour This cold KCl dip will regenerate the reference system and the diaphragm 1 2 Safety and care The sensitive element in a SENTRON probe is an ISFET semi conductor This sensing element needs to be driven by an electronic circuit that is built into the SENTRON pH meters and can only perform up to its specifications when used in combination with one of those pH meters Any other combination might cause loss of performance and irreversable damage to both probe and meter The fact that SENTRON probes are ruggedly built to last even in harsh conditions does not mean that they need no maintenance at all Read the operating tips well to ensure lasting satisfaction Tris buffers and samples containing proteins should be tested quickly and the probe should be rinsed thoroughly with deionized water between samples When testing is complete clean with water and a laboratory detergent and rinse with deionized or distilled water Avoid prolonged immersion in samples containing Tris or proteins Avoid prolonged immersion in samples expected to have pH values which lay at the ends of the specified pH range When unavoidable rinse with ample water in between samples Rinse with n2. make sure that the probe you have received has a connector that matches your meter This can be done by checking the last two digits of your probe label for the Argus and Titan series 08 for 1001 and 2001 series 01 for 3001 series 03 for 701 series 11 Barrel and tip PEI poly ether imide Packaging material epoxy resin Reference liquid gelled KCI Diaphragm porous PTFE Refer to your SENTRON meter manual If doubts concerning applicability arise please contact your local dealer If you have purchased a new probe to fit your old type pH meter 701 1001 2001 3001 contact your dealer to receive updated information on the chemical resistance of the probe 7 Warranty This SENTRON probe is produced packed and shipped with the utmost care If the former notwithstanding defects do arise be advised that this SENTRON probe is warranted to be free from defects in material and craftmanship for the period of half a year SENTRON will repair or replace at SENTRON s option any defective part free of charge if this product fails within 6 months from the date of purchase provided that the failure is due to defective material or lack of craftsmanship and has occurred under normal conditions of usage to be judged by SENTRON SENTRON disclaims any liability to customers to users of its products or to any other person or persons for any special or consequential damage that might arise out of or that might in any way be conne
3. SENTRON Stream Line probe series User manual Distributor Topac Inc 231 CJC Highway Cohasset MA 02025 Tel 781 740 8778 Fax 781 740 8779 www topac com email sales topac com Manual S tream Line probe SENTRON reference number E 7500180 Version 1 01 April 2002 1 Introduction Congratulations You have just bought a SENTRON Stream Line probe one of the finest pieces of pH measuring equipment available in the world today With proper care and following the given instructions you are likely to enjoy the benefits of your SENTRON pH system for a long time Although also very suitable for general pH testing the Stream Line probes are specially designed for low conductivity applications or highly concentrated or contaminating samples This probe features a refillable reference liquid compartment with a constant reference liquid outlet through a large area porous PTFE diaphragm On top of that it is resistant to temperatures up to 105 C and to more aggressive chemicals Within the Stream Line series there are two different probe types available ConeFET for application in highly viscous materials such as pastes jellies slurries pulps waterbased polymer emulsions etc SurFET for direct surface measurement applications in paper industry water based printing inks paints coatings etc To avoid disapointment please make sure you have selected the right member of the comprehensive SENTRON probe family This can be se
4. cted with the use of this instrument or its accessoires The warranty described in this paragraph shall be in lieu of any other warranty expressed or implied including but not limited to any implied warranty or merchantability or fitness for a particular purpose The buyer s sole and exclusive remedy is for repair or replacement of defective parts as provided therein Representations and warranties made by any person including dealers representatives and employees of SENTRON which are inconsistent or in conflict with the terms of this warranty shall not be binding upon SENTRON unless in writing and signed by one of its officers SENTRON reserves the right to ask for proof of purchase such as the original invoice or packing slip All information contained in this manual is current at the time of publication Our commitment to product improvement requires that we reserve the right to change equipment procedures and specifications at any time
5. en from the type name on the barrel of the probe Other members of this family are The SENTRON Red Line probes a series of probes for general purpose applications up to 60 C The SENTRON Hot Line probes for use in demanding applications where higher sample temperatures up to 105 C or contact with more aggressive chemicals are to be expected but a flowing reference system is not required All SENTRON pH probes contain an lon Sensitive Field Effect Transistor ISFET sensor a silver silverchloride potassiumchloride reference system and a thermistor to allow Automatic Temperature Compensation ATC Each probe also has an identity of its own a fingerprint so to speak enabling your SENTRON meter to identify your new probe s fingerprint through calibration 2 Cleaning tips Soapy water method for cleaning the probe To have most pleasure of your probe good cleaning is a must If the probe is not properly cleaned it can happen that the probe does not work due to a polluted diaphragm or ISFET The fluid in which you are measuring can cause this Is the probe not cleaned regularly the diaphragm will block the internal electrode In such case there is no electrical contact between the electrode and the ISFETchip and the probe will not work properly To prevent this you must clean the probe regularly The frequency is depending of the sample you are measuring in As reference it is mostly also visible the diaphragm is no
6. eutralising agents and destilled water when the measurement is completed and prior to storage Do not use outside the specified temperature range as this might result in probe failure or irreversable damage to the probe Samples must be aqueous solutions or semi solids and compatible with the probes wetted materials If information is required regarding the chemical resistance of the probe please refer to your SENTRON meter manual or contact your local dealer All wetted materials used are in compliance with the directives of the Food amp Drug Administration FDA of the United States of America 3 Daily use Remove and save the protection tube from the probe prior to use Open the refilling hole by moving the silicon band approx one centimeter towards the probecap to allow reference liquid flow during operation Check before each operation whether or not the level of the reference liquid is sufficient If you are not sure or if the level is too low fill with reference liquid See Tip 7 Prior to daily use scrub the probe tip with a soft bristled toothbrush and water to remove KCI crystals and other possible residues Use some mild detergent if required Rinse with deionized or distilled water Soak the probe in pH 7 00 buffer or pH 4 00 buffer with the meter ON in any mode prior to calibration for at least 10 minutes For maximum stability and accuracy perform the calibration sequence twice To store the probe clean it th
7. oroughly with water and a soft bristled toothbrush again a mild detergent may be used and rinse with deionized or distilled water Re adjust the silicon band over the refilling hole Replace the protective tube Fill the protective tube with saturated KCI 2 see tip 1 to the level that after replacing the probe at least the tip of the probe is completely submerged in the liquid Slide the screw cap onto the probe body followed by the sealing O ring Slide cap and ring onto the rim of the protective tube press the cap down and only then tighten the screw cap Note When used in samples containing small hard solid particles e g pigments titaniumoxide silicates etc first rinse the probe with ample water before using the brusch 4 Operating tips Tip 1 To prepare saturated KCI potassium chloride solution Add KCl granules to distilled water untill no more KCI will dissolve Adding 38 grams of KCI to 100 ml water is sufficient Let this stand for at least two hours and decant the clear solution Now you have saturated KCI Tip 2 To ensure correct measurement values samples or buffers need to be mixed well This may be done by a magnetic stirrer or by stirring with the probe for at least 5 seconds Stop stirring and record results when the read out is stable Tip 3 Proteins fats and oils may be removed by scrubbing in a solution of e g Terg A Zyme Alconox company a pepsin solution or a similar product Afterwards rinse thour
8. oughly with deionized or distilled water Cleaning agents are available at SENTRON ask your local dealer Do not use hydrofluoricacid acetone MEK or similar agents for cleaning Tip 4 When testing in direct sunlight or on a bright reflecting surface please use brown opaque or shielded sample containers Very bright light might influence the performance of the sensor Tip 5 Buffer handling pH 7 00 buffers phosphate based and pH 4 00 buffers biphtalate based are less susceptible to carbondioxide contamination than pH 10 00 buffers borax or carbonate based When slope errors occur it usually indicates a failing probe or a contaminated buffer If seen when using pH 10 00 buffer try calibrating with pH 7 00 and pH 4 00 buffer If a good slope is achieved try a new bottle or different lot pH 10 00 buffer All pH buffers can be purchased at SENTRON contact your local dealer Tip 6 When using ConeFET probes with semi solids insert probe to desired depth then rotate left and right several times and tilt to ensure sample contact Tip 7 Adding reference liquid to the barrel reference gel container the easiest way to execute this is to fill a syringe with reference liquid move the silicone band on the barrel approx one centimeter towards the probecap A hole in the barrel will appear Empty the syringe through the hole into the barrel Repeat until a satisfactory level of reference liquid is obtained Spare refilling reference liq
9. uid can be purchased at SENTRON order through your local dealer Tip 8 Slide the rubber band up down until the hole is visible prior to calibration and measurement to allow the reference gel to flow out of the probe 5 Trouble shooting If any of the following events occur low slope drift instability of the reading slow calibration probe will not calibrate pH value doesn t change as expected when changing samples 3 Clean probe with warm 40 C 104 F tap water and a soft bristled toothbrush use a mild detergent e g a non abrasive soft soap If the problem persists as a last resort blunt the point of a wooden toothpick wet it and place the blunted tip directly on the sensor area the shiny surface surrounded by black compound Then apply light pressure and brush carefully lenghtwise or twirl the toothpick on the sensor surface Try to avoid damaging the ISFET Clean the surface with water and a toothbrush rinse and calibrate as decribed earlier 6 Specifications Sensor Operating temperature pH range Reference compartment Dimensions Probe lenght Probe diameter Cable lenght Connector Wetted materials Chemical resistance Semi conductor lon Sensitive Field Effect Transistor ISFET sensor with patented ESD protection circuit 5 C to 105 C pH 0 to pH 14 thickened saturated KCl gel refillable 200 mm 10 mm 1 5 mtr There are different types of connector available Please
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