Mi605 - Milwaukee Instruments
Contents
1. require recelibretion 9 SALINITY COMPENSATION To enter salinity compensation press the FACTOR key twice and the SALT FACTOR rressage will be dis played Use UP and DOWN keys to set the salinity between 0 and 80 gL cv La S N nam am ppm Y W SALT FACTOR J 4 The neer will autorratically conpensate for salinity effects see also following table for verification Salinity g l at Sea Level 20 g l 30 g l PROBE POLARIZATION The probe is under polarization with a fixed voltage of approximately 800 nv Probe polarization is essential for stable measurements with the sane recuning degree of accuracy With the probe properly polarized oxygen is continually consumed by passing through the sensitive diaphragm and dissolving in the electrolyte solution inside the probe If this operation is interupted the electrolyte solution con tinues to be enriched with oxygen until it reaches an equilibriumuith the surrounding solution Whenever measurements are taken with a non polarized probe the oxygen level indicated is both that of the test solution as well as that present in the electrolyte solution This reading is obviously incorrect IMEASUREMENTS Make sure the neter has been calibrated and the protective cap has been removed Inm rse the tip of the probe in the sanple to be tested while ensuring that also the tenperature sensor is inn rsed For accurate dissolved oxygen nr2. C CALIBRATION Auonatic in saturated air TEMPERATURE COMPENSATION Autorratic from0 to 50 C ALTITUDE COMPENSATION Oto 4000 m 100 mresolution SALINITY COMPENSATION Oto 80 gL 1 gL resolution PROBE MA840 induced ENVIRONMENT O to 50 C 100 RH nax BATTERY TYPE 1x9 alkaline induded BATTERY LIFE approx 100 hours of use AUTO OFF after 4 hours of non use DIMENSIONS 200 x85 x50 nm WEIGHT 280 g with battery ACCESSORIES MA840 D O probe MA841 Spare membrane 5 pcs MA9071 Refilling Electrolyte solution 230 ni 3 INTIAL OPERATIONS The meter is supplied with a 9V battery Remove the battery corpartment cover on the back of the meter and install the battery while paying attention to its polarity PROBE PREPARATION D O probes are shipped dry To hydrate the probe and prepare it for use connect it to the n ter and proceed as follows Shipping L Remove the red and black plastic cap cap This cap is used for shipping purposes only and can be thrown away 2 Wetthe sensor by soaking the bottom2 5 amof the probe in electrolyte MA9071 red J for 5 minutes 3 Rinsethe rerba supplied aT with the neten with electrolyte while shaking it gently Refill d with dean electrolyte SECOND O RING FILL 4 Gently tap the sides of the rrentrare with the finger tip to ensure that no air bubbles re main trapped To avoid dam aging the nentbrane do not tap the rr
3. USER MANUAL MI 605 Portable Dissolved Oxygen Meter MARTINI de ogoi instruments hole ae 10 ge 3 AGDESSONES oe 3 hitia fo a eg gt sss sa case seceecsvecesccdceceecaneseeccscsteszustace 4 Probe preparation Onn nee 4 Probe 00 1 pri IG 1 ANNE ME Se 5 185 gg gg iciiseicisccciccssecdessessdansaaccaveasseasessentvecces 5 Altitude compensation oes e cece cece cece ee eeeeeeeeeeeeeeanananaes Fi S alinity nper Saai reissaa ananassae inaina 8 o r uo gjoo a ot PE 9 Probe amp nenbrane rreintenance evrnnrvvvvenvvvvveevnnn 10 Battery l C a6 9 Se u WARRANTY This instrument is warranted against defects in materials and manufacturing for a period of two years from the date of purchase Probe is warranted for 6 months If during this period the repair or replacement of parts is required where the damage is not due to negligence or erroneous operation by the user please return the parts to either distributor or our office and the repair will be effected free of charge Damages due to accidents misuse tampering or lack of prescribed maintenance are not covered 2 If the Platinumcathode is tamished or stained which could be due to contact with certain gases or to an extended use with a loose or danaged nremtorane it should be deaned Use a dean lint free doth and rub the cathode very gently side to side 4 5 tines This will be enough to polish it and remove any stains without darragin
4. easurerrents a weiter moverrert of at least 0 3 m sec is required This is to ensure that the oxygen depleted nenbrane surface is constantly replenished A moving stream wil provide an adequate circulation To quickly check if the water speed is suffidert weit for the reading to stabilize and then nove the D O probe If the reading remains stable the nea surerrent conditions are right while if the reading increases the wetter rroverrent is not adequate 5 During field neasurerrents this condition may be met by manually agitating the probe Accurate readings are not possible while the liquid is at rest During laboratory neasurenents the use of a magnetic stirrer to ensure a certain velocity in the fluid is recom mended In this way errors due to the diffusion of the oxygen present in the air in the solution are reduced to a minimam Any ay weit the tine necessary for themal equilibrium to occur between the probe and the sampe a few minutes for ten perature difference of several degrees The rreter can display D O readings in n l ppm and in O rate of Oxy amp gen saturation with reference to 100 at sea level Press the RANGE key to select the desired range The tenperature reasurerrertis always na displayed on the lower part of the LCD Kr 206 If the sanple contains salts or if the neasurenert is perfonred at altitude different fromsea level the readout values must be corrected taking into account the lower d
5. egree of oxygen solubility Set altitude and salinity compensations before performing calibration and taking measurements The meter will auto rraticelly conpensate for these factors ALTITUDE COMPENSATION To enter altitude compensation press the FACTOR key and the n ter will display the ALT FACTOR rressage Use UP and DOWN keys to set the altitude from0 to 4 0 km in steps of 0 1 km PIAF LI im a iSror a5 Lue The n ter will automatically conpensate for altitude see also the table below for verification Altitude Meters above Sea Level 1200 1500 11800 m m m 12 7 112 3 11 8 12 0 111 6 11 2
6. entorane directly on THEN SCREW the bottom BACK ON 5 Place rubber O Ring properly inside the mentbrane cap 6 With the sensor facing down screwthe cap dockwise Sone eledrolyte will overflow When not in use and during polarization place the protec tive cap supplied with the meter 4 CALIBRATION PROCEDURE Calibration is simple and is recommended every tine the neter is switched on Make sure the probe is ready for measurements see Probe Preparation i e the nenbare is filled with electrolyte and the probe is connected to the meter and Properly polarized Switch the neter on by pressing the ON OFF key The COND rressage will be dis Played for about 45 sec to informthe C on d user that the probe is in auto concition ing mode automatic polarization Once COND disappears the probe is polarized and the instrunert can be Calibrated e Remove the probe protective cap Press CAL appears on the larger LCD together with CAL to indicate that the instrurrentis in cali bration node Theinsturertwill autorretically san dardize itself to the actual saturation value After approx 1 minute it will display 100 to indicate that the calibration is conplete Notes Itis recommended to recalibrate the meter when ever probe nremtbrane or dedrolyte is changed To exitthe calibration node press CAL Switching fromreadings in O to readings in my L does not
7. g the Platinum tip Afterwards rinse the probe with deionized or distilled wetter and install a new nremtbrane cap using fresh electro lyte and follow the steps above Recalibrate the instrument Note To obtain accurate and stable neasurerrents it is inportant that the surface of the nrentbrane be in perfect condition This seriperrreable nentbrane iso lates the sensor elerrents fromthe enMironment but allows oxygen to enter If any dirt is observed on the rrembrane rinse it carefully with distilled or deionized wetter If any inperfedtions still exist or any danage is evident Such as winkles or tears holes replace the neniarane Make sure that the O Ring is properly seated in the nremtorane cap Note If donttake neasurerrents for a few hours protect the probe with the supplied cap BATTERY REPLACEIVENT Vhen the battery beconres weak the meter will display the Hiinking battery symbol to indicate that only about 10 hours of battery life remain A low battery will result in unreliable rreasurerrerts It is recommended to replace the battery invreciately by using an alkaline QV battery Tun the neer off unscrewthe two screws on the rear of the insturrert remove the cover and replace the OV battery with a new one Install the battery while paying attention to its polarity and reattach the cover 11 PROBE amp MEMBRANE MAINTENANCE The D O probe body is made of reinforced plastic for naxinumadurability A themristor te
8. mperature sensor provides temperature nee surerrents of the tested sanple It is always recommended to keep the protective cap on the probe when notin use to protect it against danrage and dirt To replace the membrane or refill it with electrolyte proceed as follows Remove protective cap by gently twist ing and pulling it off the probe s body Unscrew the rrerrbrane by tuming it counterclockwise with the other hand Wet the sensor by soaking the bottom 2 5 am of the probe in dectolye MA9071 for 5 minutes Rinsenewrenteresupdiedwith meer with electrolyte while shaking it gently Refill with dean electrolyte Genty tap the sides of the nmenbrane with the finger tip to ensure that no air bubbles remain trapped Do no directly tap the bottommiith the finger as this will Carrege the rembrare Make sure that the rubber Oring is seated properly inside the rremtrare cap e With the sensor facing down saewthe rentrane cap dockwise Sone dec trolyte will overflow SILVER CHLORIDE ANODE PLATINUM CATHODE OXYGEN PERMEABLE MEMBRANE 10 IFI TWIST AND PULL A in UNSCREW O RING SEAL SPECIFICATIONS RANGE 0 0 to 45 00 nyt PPM O 0 0 to 300 O 0 0 to 50 0 C RESOLUTION 0 01 ng L PM O 0 1 YO 0 1 C ACCURACY 15 F S N L O O 25T 0 5 C TYPICAL EMC lt 0 3 nal ppm O 3 5 YO DEVIATION 05
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