Milwaukee Instruments SM605 User's Manual
Contents
1. If the sample contains salts or if the measurement is perfonred at altitude different fromsea level the readout values must be corrected taking into account the lower degree of oxygen solubility Set altitude and salinity conjpensations before performing calibration and taking nreasurerrents The meter will autorratically conpensate for these factors ALTITUDE COMPENSATION To enter altitude corpensation press the FACTOR key and the neter will display the ALT FACTOR message Use UP and DOWN keys to set the altitude from 0 to 4 0 km in steps of 0 1 km SAMPLE ALT FACTOR The neer will autorratically conpensate for altitude see also the table below for verification Altitude Meters above Sea Level 1200 1500 1800 m m m 12 7 12 3 11 8 12 0 11 6 112 11 4 SALINTY COMPENSATION To enter salinity conpensation press the FACTOR key twice and the SALT FACTOR message will be dis played Use UP and DOWN keys to set the salinity between O and 80 g L The neter will autorratically conpensate for salinity ef fects see also following table for verification Salinity g l at Sea Level 10 g l 120 g l 30 g l CALIBRATION PROCEDURE Calibration is sinde and is recommended every tine the neter is switched on e Make sure the probe is ready for measurements see Probe Preparation i e the nenbrane is filled with electrolyte a2. ACCURACY 25 C 1 5 Full Scale ng L pon O 1 5 Full Scale O 05 C TYPICAL EMC DEVIATION 0 3 ng L pom O 3 5 0 05 C CALIBRATION Auonatic in saturated air TEMPERATURE COMPENSATION Autorratic from to 50 C ALTITUDE COMPENSATION Oto 4000 m 100 mresolution SALINITY COMPENSATION Oto 30 gL 1 gL resolution PROBE MA840 induded ENVIRONMENT O to 50 C 100 RH nax BATTERY TYPE 1x9 alkaline included 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 ISM605R1 11 03
3. cap has been rnoved Innerse the tip of the probe in the sanle to be tested while ensuring that also the temperature sensor is intrersed For accurate dissolved oxygen neasurerrents a weater rmroverrent of at least 0 3 n sec is required This is to ensure that the oxygen depleted nrembrane surface is constantly replenished A moving streamwiill provide an adequate circulation To quickly check if the waiter speed is sufficient wait for the reading to stabilize and then trove the D O probe If the reading remains stable the measurerrent conditions are right while if the reading increases the weiter movement is not adequate During field nreasurerrents this condition may be net by manually agitating the probe Accurate readings are not possible while the liquid is at rest During laboratory nreasurerrents 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 minimum Anwey weit the tine necessary for thenmal equilib riumto occur between the probe and the sande a few minutes for tenperature difference of several degrees The rreter can display D O readings in ng L poem and in O rate of Oxygen Ge saturation with reference to 100 at sea level Press the RANGE key to select the desired range The tenperature neasurerrent is al ways displayed on the lower part of the LCD
4. AW Milwaukee USER MANUAL PORTABLE DISSOLVED OXYGEN METER MODEL SM605 Dissolved Orygen Meter MY Miwoukee IES OOO 22 Dissolved Oxygen Meter WARRANTY This instrument is warranted against all defects in materials and manufacturing for a period of two years from the date of purchase Probe is warranted for six months If during this period the repair or replacement of parts is required and the damage is not because of negligence or erroneous operation by the user please return the parts to either distributor or our office and the repair will be made free of charge Damage due to accident misuse tampering or lack of prescribed maintenance are not covered Note We reserve the right to modify the design construction and appearance of our products without advance notification INTIAL OPERATIONS The neter is supplied with a I battery Remove the battery conpartrent 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 meter and proceed as follows L Remove the red and black plastic cap Shipping ca This cap is used for shipping purposes p only and can be thrown awey 2 Wet the sensor by soaking the bottom black 2 5 cm of the pobe in electolye _ J MA9071 for 5 minutes red 3 Rinse the rrermbrane sup A
5. TT plied with the meter with electrolyte while shaking it Ai FIRST gently Refill with clean seconp _ INSERT E O RING draye FILL F 4 Genty tap the sides of the nenbrane with the finger tip to ensure that no air bubbles remain trapped To aod danagin the men SCREW brane do not tap the BACK ON nenbrane directly on the bottom ANT 5 Place rubber O Ring properly inside the rremtbrane cap ol 6 With the sensor facing down screwthe cap clockwise Sorre electrolyte will overflow When not in use and during polarization place the protective cap supplied with the meter 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 th the probe properly polarized oxygen is continually consumed by passing through the sensitive diaphragm and dissolving in the electrolyte solution contained in side the probe If this operation is interrupted the electrolyte solution continues to be enriched with oxygen until it reaches an equilibriiumwith 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 solu tion This reading is obviously incorrect MEASUREMENTS Make sure the neter has been calibrated and the protective
6. e neasurerents itis inportant that the surface of the nrembrane be in perfect condition This serripenreable membrane isolates the sensor elerrents from the environ ment but allows oxygen to enter If any dirt is observed on the nrembrane rinse it carefully with distilled or deionized water If any inqperfections still exist or any danage is evident Such as wrinkles or tears holes replace the menbrane Make sure that the O Ring is properly seated in the rrerrbrane cap Note If don t take nmeasurerrents for a few hours protect the probe with the supplied cap BATTERY REPLACEIVENT Vhen the battery becones weak the rreter will display the blinking battery symbol When the low battery indicator appears only about 10 hours of battery life remain A low battery will result in unreliable rreasurerrerts It is recontrended to replace the battery intreciately Battery replacement must only take place in a non hazarc ous area using an alkaline 9V battery Tum the rreter off unscrew the two screws on the rear of the instturrert remove the cover and replace the 9V battery with a newone Install the bat tery While paying attention to its polarity and reattach the cover ACCESSORIES MA840 D O probe MASA Spare nenbrare 5 pcs MA9071 Refilling Electrolyte solution 230 mi SPECIFICATIONS RANGE 0 0 to 45 00 n L ppm O 0 0 to 300 O 0 0 to 50 0 C RESOLUTION 0 01 ng L pp O 0 1 YO 0 1 C
7. isting and pulling it off the probe s body TWIST Unscrewthe rrembrane by tuming it AND Counterdockwise with the other hand eta Wet the sensor by soaking the bot tom2 5 amof the probe in dectolye MA9071 for 5 minutes e Rinse the new rrerrbrane supplied wih the neter with electrolyte while shaking it gently Refill with clean electrolyte e Gently tap the sides of the mem brane with the finger tip to ensure d that no air bubbles remain trapped E Do no directly tap the botom with UNSCREW the finger as this will danage the nenbane e Make sure that the rubber O ring is seated properly inside the nrembrane cap CHLORIDE ANODE e With the sensor facing PLATINUM down screw the mem CATHODE brane cap clockwise KVG f PERMEABLE Sone dedrdyte will ove TEFLON MEMBRANE flow If the Platinum cathode is tamished or stained which could be due to contact with certain gases or to an extended use with a loose or darmaged nenbrare it should be cleaned Use a clean lint free cardboard or cloth and rub the cathode very gently side to side 4 5 tines This will be enough to polish it and remove any stains without darraging the Platinumtip Afterwards rinse the probe with deionized or distilled wetter and install a new nenbrane cap using fresh electrolyte and follow the steps above Recalibrate the insturrert Note To obtain accurate and stabl
8. nd the probe is connected to the meter and propery polarized e Switch the neter on by pressing the ON OFF key e The COND rressage will be dis Played for about 45 seconds to inform r the user that the probe is in auto Lond conditioning mode automatic polarization e Once COND disappears the probe AT is polarized and the instrument can be calibrated lol e Remove the protective cap fromthe D O probe CAI e Press CAL appears on the larger LCD together with CAL to indicate that the instrurrent is in cali bration node e Theinsturrert will autorretically stan dardize itself to the actual saturation value After approx 1 minute it will display 100 to indicate that the calibration is conplete Notes e Itis recommended to re calibrate the meter when ever probe menbrane or electrolyte is changed e To exit the calibration mode press CAL e Switching from readings in O to readings in mg L does not require recalibration PROBE amp MEMBRANE MAINTENANCE The D O probe body is nade of reinforced plastic for rmeaxinumdurability A themistor ten perature sensor provides ten perature rreasurerrents of the tested sanpde Itis always recom mended to keep the protective cap on the probe when notin use to protect it against darrage and dirt To replace the membrane or refill it with electrolyte proceed as follows e Renowe the protective cap by gen N tly tw
Download Pdf Manuals
Related Search