Heavy Duty Dissolved Oxygen Meter Model 407510
Contents
1. EXT INSTRUMENTS User Guide Heavy Duty Dissolved Oxygen Meter Model 407510 RECALL SALT FACTOR ADJ g Introduction Congratulations on your purchase of Extech s Heavy Duty Dissolved Oxygen Temperature Meter which simultaneously displays Dissolved Oxygen or Oxygen in air and Temperature Units of measure are mg l for Dissolved Oxygen for Oxygen in air and C F for temperature Oxygen is measured with a remote sensor that also contains a thermistor for measuring temperature Advanced features include RS 232 PC serial interface data hold auto shut off and Min Max Avg recording Meter Description 1 LCD Display 2 POWER ON OFF key 8 3 Data HOLD key 4 C F selection key 5 RECORD key 9 6 RECALL key 1 7 Factor adjust key 8 Probe head 9 Sensor body 2 10 Sensor plug 4 11 RS 232 output jack 5 7 12 Battery cover rear 15 16 13 Altitude compensation key 14 14 Op Cal key 13 7 15 Zero key 12 XTEC 16 Mg L DO O2 Air selection key 17 Salt key 407510 en GB V7 7 11 15 Getting Started Note The dissolved oxygen probe assembly may be shipped to you from the factory dry If the probe does not contain electrolyte solution refer to the Electrolyte Replacement section of this manual for the instructions for adding the electrolyte solution prior to initial use Filling the Electrolyte Container Prior to Initi2. al Use 1 Unscrew and remove the electrolyte container from the tip of the probe 2 Fill the electrolyte container with new electrolyte 3 Screw the electrolyte container back onto the electrode holder and probe handle Excess Electrolyte may be forced out through the threads Wipe clean H 4 Lightly tap the probe to remove any air bubbles Calibration For first time use or after long periods several days of non use calibrate the instrument using the following steps The procedure should be performed in an open well ventilated area Make sure that the meter is powered OFF Ensure that the sensor is DISCONNECTED from the meter Turn ON the meter Slide the 02 DO selector to the O position Press the ZERO key to null the meter the display should indicate 00 Turn OFF the meter Connect the DO sensor to the top of the meter remove the plastic probe head protective cap Turn ON the meter Allow the meter to stand for at least five minutes until the most stable value is displayed 10 Press the O Cal key and the display will indicate approximately 20 9 typical O in air NO Or BON gt o w 3 407510 en GB_V7 7 11 15 Dissolved Oxygen DO Measurements Measurement Preparation Before taking measurements perform the calibration described above if necessary In addition perform the SALT and ALTITUDE compensation adjustments as described below SALT Compensation Slid
3. clean water after each use Oxygen in Air 02 Measurements Follow the same steps above for DO measurements except for the variations described below 1 Slide the 02 DO switch to the Oz position 2 The display will indicate the oxygen air value in Temperature Measurements The lower display will indicate the temperature of the measured solution Press the C F key to change the temperature units 4 407510 en GB_V7 7 11 15 Advanced Features Data Hold Press the Data Hold key to freeze the displayed value The LCD will display DH for Data Hold mode along with the held reading Press the Hold key again to release the data hold function MIN MAX AVG Data Recording When selected the Data Recording function records the Min Max and Average readings To start a data recording session 1 Press the RECORD key once The REC indicator will appear on the display and the meter will begin to record the lowest min highest max and average avg readings 2 To recall the data press the RECALL key once The MAX indicator will appear along with the highest reading recorded since the RECORD key was pressed 3 Press the RECALL key again to view the MIN value Press the RECALL key again to view the AVG reading 5 To exit the Record mode press the RECORD key again The display indicators REC MIN MAX and AVG will disappear Auto Power OFF The meter includes an Auto shut off feature that preserves battery life The m
4. e the 02 DO switch to the DO position If the measured liquid is pure water or is known not to have a salt content set the Salt factor to 0 1 Press the Salt key The display will indicate 0 on the middle portion of the LCD display and S on the bottom portion of the LCD 2 Pressing the Factor Adj key once will add 1 to the salt factor 3 Press the Factor Adj key until the correct factor is displayed 4 Press the Salt key to store the factor ALTITUDE Compensation The meter has a default calibration for sea level operation 0 meters Any significant deviation from sea level requires a compensation adjustment Perform the following steps to do so 1 Press the ALTITUDE key and the display will indicate a 0 in the middle of the LCD and an H on the lower portion of the LCD 2 Press the Factor Adj key once to add 100 meters twice to add 200 meters and so on Maximum compensation is 3900 meters 3 Once the desired compensation is displayed press the ALTITUDE key again to store the value Taking Measurements 1 Immerse the probe in the solution under test For best automatic temperature compensation immerse the probe to a depth of at least 4 10 cm 2 Wait until the display stabilizes 3 The velocity of the liquid coming into contact with the probe must be at least 40 to 60 ft min 0 2 to 0 3 m s If the solution is standing stir the solution with the probe or use an agitator 4 Rinse the probe with
5. eter will automatically turn off if no function button is pressed in any 10 minute period To disable this feature press the RECORD key to engage the record function LCD Contrast Adjust It may be necessary to adjust the display contrast due to a change in viewing angle or voltage drift Use the LCD Contrast adjustment located on the right side of the meter to set the preferred contrast CPU Reset Certain improper keystroke sequences can cause the meter to hang and become inoperable The following procedure will reset the meter 1 Slide the 02 DO switch to the O position Turn the meter OFF and disconnect the DO probe Press and HOLD the O2 CAL key and then press the POWER key Release the O2 CAL key and then press the ZERO key Connect the DO probe 6 Wait several minutes for the reading to stabilize and then press the 02 CAL key RS 232 PC Interface SRN The meter includes a RS 232 serial data port For streaming of data to a PC via the RS232 Output jack the optional 407001 USB kit RS232 to USB cable and driver CD along with the 407001 software available free at www extech com are required 5 407510 en GB_V7 7 11 15 Probe Storage For short term storage the probe should be stored in a moist environment to keep the membrane from drying out and needing replacement Moisten the sponge with distilled water in the protective cap Do not store it directly in the water since that could encourage algae
6. growth on the probe Probe Head Replacement The probe head on the tip of the probe holds a thin Teflon amp membrane and an electrolyte container Calibration or reading errors could indicate loss of electrolyte or a dirty damaged membrane The membrane is very delicate and can easily be damaged if it comes in contact with solid objects Replacement probe heads are available from your local distributor Replacement procedure 1 2 3 Unscrew the probe head and electrolyte container from the probe handle and discard Fill the new probe head electrolyte container with electrolyte Screw the probe head onto the probe handle Excess electrolyte may be forced out through the threads Wipe clean Lightly tap the probe to remove any air bubbles 1 Probe handle 2 Temperature sensor 3 Probe Head 6 407510 en GB_V7 7 11 15 Battery Replacement The low battery indication LBT appears on the LCD when the battery runs low To replace the battery 1 2 Remove the meter s rubber protective cover to access the rear battery compartment Remove the battery compartment cover using a small coin or screwdriver and remove the 9V battery 3 Replace the 9V battery and reinstall the cover and holster Specifications You as the end user are legally bound Battery ordinance to return all used batteries and accumulators disposal in the household garbage is prohibited You can hand over your used batteries accumulators at co
7. llection points in your community or wherever batteries accumulators are sold Disposal Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle General Specificati ons Custom one chip LSI microprocessor circuit Dual function 13 mm 0 5 1999 count LCD w contrast adjust Measurements Dissolved Oz mg l milligrams per liter Oxygen in air Temperature Data hold Sensor Structure Data recording Sample rate Data Output SC SF Data hold key freezes displayed reading Remote Polarographic Dissolved Oxygen Sensor Temperature sensor Precision thermistor Min Max Avg readings stored for later recall Meter turns off after 10 minutes 0 4 Sec approx RS 232 PC serial interface Operating conditions Temperature 0 to 50 C 32 to 122 F Humidity lt 80 RH Battery power Power Consumption Dimensions Optional accessories Display Auto power off Weight 9V alkaline battery Approx 6 6 mA DC 335 g 0 74 Ibs including batteries amp probe Main instrument 180 x 72 x 32mm 7 1 x 2 8 x1 3 Probe 190x28mm 7 5 x 1 1 length diameter Carrying case 9V battery and 5 membranes Membranes data acquisition software amp RS232 interface cable Electrical Specifications Measurement Dissolved Oxygen Oxygen in air 0 0 19 9 mg L 0 1mg L 0 4 mg L 0 100 O 0 1 O 0 7 O Temperature probe 32 to 122 F 0 1 F C 1 5 F
8. only 0 to 50 C 0 8 C Compensation adjustments Temperature automatic 0 to 50 C 32 to 122 F Salt 0 to 39 Altitude 0 to 3900 meters Copyright 2014 2015 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form www extech com 7 407510 en GB_V7 7 11 15
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