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Milwaukee MW190 MAX, Инструкция по эксплуатации

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ALTITUDE & SALINITY COMPENSATION 

21

8. ALTITUDE & SALINITY COMPENSATION

Temperature, pressure (altitude) and salinity influence DO concentration.
Cold water holds more oxygen and therefore DO concentration increases with decreasing 

temperature. Compensation for temperature-related solubility is done automatically 

using the probe’s built in temperature sensor. 

Altitude compensation

When measurements are done at an altitude below sea level, oxygen solubility increases. 

Conversely for measurements made above sea level, the oxygen solubility decreases. 
Select the approximate altitude in the SETUP menu (see Altitude Compensation for 

details).

Salinity compensation

The solubility of oxygen in water is also influenced by the amount of salt in the water.
Freshwater holds more oxygen than saltwater does. 
Seawater typically has a salinity of 35 g/L and the oxygen solubility is 18 % less compared 

to fresh water at 25 °C. By entering the approximate salinity value, the calibration and 

subsequent concentration measurement will be compensated to display the correct 

oxygen concentration. A 18 % error would result if the salinity value is not entered.
The solubility of oxygen dissolved in water decreases in brackish or seawater; or for 

measurements made at above sea level altitude.

Содержание MW190 MAX

Страница 1: ...INSTRUCTION MANUAL SATISFACTION GUARANTEED MW190 MAX Dissolved Oxygen Temperature Bench Meter...

Страница 2: ...part is prohibited without the written consentofthecopyrightowner MilwaukeeInstrumentsInc RockyMount NC27804USA THANK YOU for choosing Milwaukee Instruments This instruction manual will provide you th...

Страница 3: ...6 1 POWER CONNECTION BATTERY MANAGEMENT 12 6 2 PROBE PREPARATION 12 6 3 PROBE MAINTENANCE 14 7 SETUP 15 7 1 SETUP OPTIONS 15 8 ALTITUDE SALINITY COMPENSATION 21 9 CALIBRATION 22 10 MEASUREMENT 25 11...

Страница 4: ...d in a cardboard box and is supplied with y MA845 Dissolved Oxygen and Temperature polarographic probe y MA841 Membrane cap and o ring 2 pcs y MA9071 Electrolyte solution y MA9315 Electrode holder y P...

Страница 5: ...mpensated Other features include y Easy to read LCD display y Built in rechargeable battery with an 8 hour capacity y Auto off feature to prolong battery life y Battery charger with battery monitor y...

Страница 6: ...122 0 F Salinity compensation 0 to 40 g L with 1 g L resolution Altitude compensation 500 to 4 000 m 1640 to 13123 with 100 m 328 resolution Log Max 1000 log records stored in up to 100 lots On deman...

Страница 7: ...mperature range 0 0 to 50 0 C 32 0 to 122 0 F Temperature sensor Built in thermistor Cathode Platinum Anode Silver Membrane Oxygen permeable Teflon membrane Connector socket DIN 7 pins Body PP ABS IP6...

Страница 8: ...logged values 4 SETUP key to enter setup mode 5 LOG CLEAR key to log the reading or to clear calibration or logging 6 ON OFF key 7 directional keys for menu navigation and setting parameters 8 RANGE...

Страница 9: ...FUNCTIONAL DISPLAY DESCRIPTION 9 Rear Panel 1 2 3 4 1 Micro USB port 2 USB type A port 3 Power supply socket 4 DIN probe connector...

Страница 10: ...on status 4 Mode tags 5 Probe symbol 6 Log tag 7 Accept tag 8 Third LCD line message area 9 Measurement units 10 First LCD line measurement readings 11 Arrow tags to navigate the menu in either direct...

Страница 11: ...cted by an oxygen permeable membrane Oxygen that passes through the membrane causes a current flow from which the oxygen concentration is determined The membrane is fixed to a detachable cap that allo...

Страница 12: ...bottom 2 cm 1 of the sensor in MA9071 electrolyte solution for 5 minutes 4 Inspectthemembranecap Themembraneisthinandcannotberepairedifdamaged 5 Position the o ring Prime the cap with electrolyte solu...

Страница 13: ...e performed unless maintenance is performed or the probe is disconnected from the meter The probe is polarized with a fixed voltage of approximately 800 mV between the cathode and anode Probe polariza...

Страница 14: ...rinse it carefully with distilled or deionized water If damaged replace the membrane cap Note Change the membrane every 8 weeks or more frequently if used in a specially fouling environment Check and...

Страница 15: ...ons Use keys to modify values value being modified is displayed blinking y Press GLP ACCEPT to confirm and save changes ACCEPT tag is displayed blinking y Press ESC or CAL EDIT again to exit Edit mode...

Страница 16: ...ptions 1 to 7 days default or off Use keys to select the number of days since last calibration has elapsed Altitude Compensation Options 500 to 4000 m Use keys to set the appropriate altitude of the l...

Страница 17: ...ns ppm or mg L Press RANGE to navigate right and select the unit Date Options year month or day PressRANGE toselectoptions Use keystomodifythevalues Time Options hour minute or second Press RANGE to s...

Страница 18: ...0 60 minutes or off Use keys to select the time The meter will power off after set period of time Sound Options enable default or disable Use keys to select When pressed each key will emit a short aco...

Страница 19: ...CD contrast values Default Values Resets meter settings to factory defaults Press GLP ACCEPT to restore the default values RESET DONE message confirms that the meter performs with default settings Ins...

Страница 20: ...comma default or semicolon Use keys to select the columns separator for the CSV file Export to PC Log on Meter Options Export to PC and Log on Meter With the micro USB cable connected press SETUP Pres...

Страница 21: ...y decreases Select the approximate altitude in the SETUP menu see Altitude Compensation for details Salinity compensation The solubility of oxygen in water is also influenced by the amount of salt in...

Страница 22: ...tion is sufficient The meter should be recalibrated y Whenever the probe is replaced y When high accuracy is required y If CAL EXPIRED or NO CAL is displayed y At least once a week 100 Saturated Calib...

Страница 23: ...ution into a small beaker 2 Submerse the membrane cap and temperature sensor into the beaker and stir gently for 2 3 minutes When the reading is stable and within the limits LCD displays STD with ACCE...

Страница 24: ...y NO CAL Calibration Messages Warnings y WRONG STANDARD is displayed if the reading exceeds the expected value Calibration can not be confirmed Check that correct calibration solution has been used an...

Страница 25: ...the temperature sensor is also immersed y Allow time for the reading to stabilize Note The sample should be stirred when taking a reading The measured DO value in is displayed on the first LCD line th...

Страница 26: ...erformed DO reading is not performed y TEMP OUT OF SPEC is displayed if the temperature is outside temperature probe limit Temperature limit is displayed blinking Neither temperature nor DO reading is...

Страница 27: ...ressed y All manual readings are stored in a single lot i e records made on different days share the same lot Log on stability y Readings are logged each time LOG CLEAR is pressed and stability criter...

Страница 28: ...d Note Pressing ESC or LOG CLEAR with WAITING displayed exits without logging The LOG SAVED screen displays stored log number FREE screen displays total number of available records Interval Logging 1...

Страница 29: ...al logging sessions across all 100 lots can store up to 1000 records When a logging session exceeds 600 records a new lot will be created y Lot names are automatically allocated by the meter from 001...

Страница 30: ...selected use keys to view the records stored in that lot 6 Press RANGE to view additional log data on the third LCD line altitude salinity date time calibration points lot info 11 2 2 Deleting Data M...

Страница 31: ...wed by LOG RECALL with ACCEPT tag blinking and the total number of logs 2 Press GLP ACCEPT to confirm 3 Use keys to select MANUAL or STABILITY lot type 4 Press GLP ACCEPT to confirm 5 Use the to navig...

Страница 32: ...me blinking Note Use keys to select a different lot number 6 Press GLP ACCEPT to confirm to exit press ESC or CAL EDIT or LOG CLEAR PLEASE WAIT with ACCEPT tag blinking is displayed until the lot is d...

Страница 33: ...h ACCEPT tag blinking y Press GLP ACCEPT Meter disconnects from the PC and the PC icon is no longer displayed y To return to EXPORT TO PC mode follow steps 2 and 3 above Exported data file details y T...

Страница 34: ...moved if the USB icon is not displayed Do not remove the USB drive during export Overwriting existing data 1 When the LCD displays OVR with LOT blinking USB icon is displayed an identical named lot ex...

Страница 35: ...played an identical named lot exists on the USB 2 Press GLP ACCEPT to continue LCD displays OVERWRITE with ACCEPT tag blinking 3 Press GLP ACCEPT again to confirm Not confirming exits the export Displ...

Страница 36: ...a log y Press GLP ACCEPT y Use keys to scroll through the calibration data displayed on the third LCD line y Press ESC or GLP ACCEPT to return Measurement mode 12 1 DO INFORMATION Calibration data dis...

Страница 37: ...ken probe Replace the probe LCD tags displayed continuously at startup ON OFF key is blocked Check the keyboard If error persists contact Milwaukee Technical Service Internal Er X Internal hardware er...

Страница 38: ...t is used Any modification introduced by the user to the supplied equipment may compromise the meter s performance For your and the meter s safety do not use or store the meter in hazardous environmen...

Страница 39: ...Milwaukee Instruments reserves the right to make improvements in design construction and appearance of its products without advance notice...

Страница 40: ...C H 6726 Szeged HUNGARY tel 36 62 428 050 fax 36 62 428 051 www milwaukeeinst com e mail sales milwaukeeinst com Milwaukee Instruments Inc 2950 Business Park Drive Rocky Mount NC 27804 USA tel 1 252 4...

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