407510 Datasheet, PDF (7/8 Pages) Extech Instruments Corporation. – Heavy Duty Dissolved Oxygen Meter

Battery Replacement
The low battery indication LBT appears on the LCD when the battery runs low.
To replace the battery:
1. Remove the meter's rubber protective cover to access the rear battery compartment.
2. 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
General Specifications
Circuit
Custom one-chip LSI microprocessor circuit
Display
Dual function 0.5" (13 mm) 1999 count LCD w/ contrast adjust
Measurements
Dissolved O₂: mg/l (milligrams per liter); Oxygen in air: %;
Temperature: °C/°F
Data hold
Data hold key freezes displayed reading
Sensor Structure Remote Polarographic Dissolved Oxygen Sensor
Temperature sensor: Precision thermistor
Data recording
Min/Max/Avg readings stored for later recall
Auto power off
Meter turns off after 10 minutes
Sample rate
0.4 Sec (approx.)
Data Output
RS 232 PC serial interface
Operating conditions Temperature: 32 to 122 °F (0 to 50 °C); Humidity: < 80% RH
Battery power
9V alkaline battery
Power Consumption Approx. 6.6 mA DC
Weight
0.74 lbs. / 335 g (including batteries & probe)
Dimensions
Main instrument: 7.1 x 2.8 x1.3" (180 x 72 x 32mm)
Probe: 4.9" x 0.8" length/diameter (125 x 20mm)
Accessories
Carrying case, 9V battery, and 5 membranes
Optional
accessories
Membranes, data acquisition software & RS232 interface cable
Electrical Specifications
Measurement
Dissolved Oxygen
Oxygen in air
Temperature
(probe only)
Compensation
adjustments
Range
0.0 - 19.9 mg/L
0 - 100% O₂
32 to 122 ^oF
0 to 50 ^oC
Temperature (automatic)
Salt
Altitude
Resolution
Accuracy
0.1mg/L
+ 0.4 mg/L
0.1 % O₂
+ 0.7% O₂
0.1^oF/C
±1.5 ^oF
+ 0.8 ^oC
32 to 122 ^oF (0 to 50^oC)
0 to 39% (1% = ppt)
0 to 3900 meters
7
407510 V7.0 10/06