User's Guide
Contents
1. Preparation 1 Remove the protection cap and the probe cap from meter 2 Remove the membrane cap carefully 3 Fill the membrane cap with the electrolyte solution up to the bottom of the threads on the inside of the cap Please see step 8 11 in Membrane Cap Replacement below for details 4 Press button to turn the meter power on Calibration 1 Remove the probe cap Press to turn on power and press to choose eH mode Wait 10 minutes to 30 minutes for the probe to polarize The reading should be approx 101 7 saturation after the probe has completely polarized 2 Let the probe in the air Press and hold for 3 sec to enter calibration mode The display will appear CAL and flashing 101 7 When the display stops flashing and indicates SA then End while calibration ends and will return to measurement mode 3 Optional zero oxygen calibration improves measurement accuracy for very low or very high DO measurements Place the probe into a zero oxygen calibration solution such as 5 sodium sulfite wait for stability and press and hold to enter calibration Stability in a zero solution may take many minutes depending on the probe history Note 1 If the reading is not 0 while the probe is not connected calibrate it in the air without probe to make reading becomes 0 4 Measurement lt DO gt 1 Remove the probe cap and turn on the power Wait 10 minutes to 30 minutes for the probe2. Accessories Meter Membrane Cap x 2 Electrolyte x 50 ml Plastic burette Lanyard Battery has been installed Sandpaper Instruction manual Carrying case 1 Device Description Lanyard Connection Battery Compartment Cap gt n Main Display Hold Max Min Button Function Mode Button Power Calibration Button 4 Probe Collar lt Probe Module Protective Cap gt probs Gas Probe Description lt DO probe L 4 Anode Membrane Cap gt x lt Cathode Display Description Li mg l uS mS PPt PPM mY pH Unit Measuring GE GE SM i e XIN NINE l Ze Te Te Te Calibration 1 i f j St 1 Bei Ee Fei id El Function Mode Maximum value gel Ci Temperature Battery F indicator consumption I indicate H Automatic me an or r oo Temperature Minimum value Compensation Hold reading Functions of keyboard Power Calibration 1 Press button to switch power On or Off 2 Press and hold button to enter calibration mode Function Mode 1 Press to switch DO mgA DO ppm and 02 2 Press and hold button to change degree C or F Hoid Max amp Min 1 Press button to enter Hold mode 2 Press and hold button to enter Maximum Minimum mode In this mode press button with light to get Maximum and Minimum value 3 Press and hold button again to exit this mode and return to measurement mode CANE
3. to polarize The reading should be approx 101 7 saturation after the probe has completely polarized 2 Select the desired units of measure by pressing d until the proper units are shown in the display 3 Place the probe in the sample to be measured Stir the probe in the sample to remove any trapped air bubbles from the membrane surface 4 Allow the meter time to settle to the final measurement value Note 1 The larger the difference in temperature between the probe and the solution the longer it will take for the reading to stabilize Stabilization time can vary from ten 10 seconds to five 5 minutes 2 After using cover the probe with the probe cap The sponge contained in the cap should be moistened not soaked with DI distilled water or clean tap water Functions mode 1 Press button to enter hold function mode The icon HOLD will appear and the reading value can be locked shows on display Return to measurement mode while pressing button again 2 Press and hold De button to enter measuring maximum and minimum function mode until the display appears flash icon MAX and MIN The value of maximum and minimum will show at display while pressing button with light To exit this mode press and hold Dei button until icon MAX and MIN disappear and return to measurement mode 3 Press and hold d button to change Degree C or F Note 1 The display could not auto shut off under MAX MIN mode 2 Change a new battery
4. User s Guide Dissolved Oxygen Temp Waterproof Tester Model 7031 Index Introduction 1 Features Specifications Accessories 1 Device Description Probe Deserpion Display Description 3 Functions of keyboard H Preparation Calibration 4 Measurement ccnnnninnnininnsnine 5 Advanced Setting Membrane Cap Replacement 6 Introduction Thank you for selection our products microprocessor based waterproof DO O2 Temp tester It is possible to measure a wide range of Dissolved Oxygen and Temperature with a replaceable probe We recommend that you read and follow the manual carefully Features Large LCD displays DO or O2 and Temperature simultaneously Waterproof IP 57 standard and rugged design for field use conveniently It floats on water Automatic Temperature Compensation Manual Salinity MSC and Altitude MAC Compensation and degree C F switchable X Icon SS and unit mg L ppm C F for recognition easy during select function mode 4 Displays Maximum Minimum value and data hold Low battery and consumption indicator Auto shut off after 10 minutes of non use X Easy to replace DO probe module by user Specifications DO Oz Temp Range 0 20 00 mg L 0 200 0 0 90 C 0 20 00 ppm 0 2 1 digit Accuracy 0 2 1 digit 2 FS__ 0 1 C Resolution 0 01 mg L 0 10 Compensation ATC 0 50 C MSC 0 50 ppt MAC 0 20000 ft
5. sh the probe progressively deeper into the bonded cap Finally screw the probe slowly onto the cap until fully tightened The dipping and removal technique minimizes the introduction of air bubbles into the electrolyte solution Air bubbles in the electrolyte can affect measurements 10 It is normal that excess electrolyte solution will leak out the cap during this replacement since it minimizes the introduction of air pockets Clean off the excess electrolyte before use Note 1 We recommend changing the electrolyte as it becomes yellow 2 Re calibrate and re polarize the meter once the membrane cap has been replaced or reinstalled 6
6. when the battery indicator flashing Advanced Setting 1 Press to choose DO mode 2 Press and hold to enter the menu press to choose SaLC Salt Compensation or ALtC Altitude Compensation and then press gi to confirm 3 Press up and d down to set Salt Compensation from 0 to 50 ppt or set Altitude Compensation from 0 to 20K ft 5 Membrane Cap Replacement 1 Do not touch the membrane as skin oils will interfere with the oxygen permeability rate of the membrane Replace the cap carefully 2 It is recommended that the probe remain attached to the meter during this replacement process 3 Unscrew the cap firmly and carefully from the probe 4 Rinse the old electrolyte solution from the Cathode and Anode 5 Use the supplied polishing strips to clean polish shine and or remove scratches from the cathode Be sure to moisten the cloth before polishing the cathode Do not over polish the sensitive gold cathode 6 Set the new replacement membrane cap on a flat surface Leave the cap in this position during the replacement process 7 Fill the membrane cap with the electrolyte solution up to the bottom of the threads on the inside of the cap 8 Tap the membrane cap to release and prevent air bubble in electrolyte solution 9 Keeping the cap in a fixed position on a flat surface carefully insert the probe into the new cap by first dipping and removing the probe several times from the cap With each dip pu
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