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Brief Introduction
Thank you for purchasing Environmental Express Portable Optical Dissolved Oxygen Meter.
This meter adopts luminescence technology through an optical sensor and displays data with
intelligent instrumentation. Compared to conventional polarographic dissolved oxygen meter, the
meter is more accurate, stable and easier to use. To improve instrument performance constantly, we
reserve the right to change the manual and accessories without giving notice in advance.
1.1
Luminescent optical sensor
⚫
Stability and Accuracy: Oxygen is not consumed during measurements. It is not affected by sample
flow rate and thus provides a stable measurement.
⚫
Easy to Use: No electrolytes or membranes are required; frequent calibration is not necessary.
⚫
Interference-Free: Sensor cap is coated with a light-shielding layer and minimizes the impact from
external light sources. The use of non-chemical sensors helps reduce a variety of heavy metal ions
interference in the aqueous environment with H
2
S and NH
4
and other chemical substances.
⚫
Long service life: except for mechanical deterioration (such as scratches to the light shielding layer),
the sensor cap has up to 8000 hours of service life.
⚫
Easy to calibrate and maintain. Probe is equipped with a calibration/storage sleeve, which makes
calibration and maintenance more convenient and reliable.
1.2
Intelligent instrumentation
⚫
Auto. Temperature Compensation, Auto. Air Pressure Compensation, Manual Salinity Compensation.
⚫
Clear large-size LCD with white backlight.
⚫
Stable reading and automatic lock-up modes available.
⚫
Meets IP57 waterproof rating; In addition, a rugged carrying case is provided with the instrument.
Special Notes
⚫
Sensor cap surface coating cannot withstand high temperature, so the optical
dissolved oxygen electrode cannot test water with temperature over 122
°F
(50°C).
⚫
When the electrode is not in use, it should be kept in the storage sleeve and the
sponge in the cap should be kept moist, so that the fluorescent cap will not dry out. If
the sponge is dried out or the probe is exposed in dry air for more than 8 hours, soak
the electrode in tap water for 24~72 hours (see section 4.2), otherwise it may cause
unstable measurements or slow response.
⚫
Before getting readings or performing other operations, wait about 30 seconds after
meter is powered on.
