Dissolved Oxygen Test Meter

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Portable dissolved oxygen test meter LH-D9 can test the dissolved oxygen in water, which is used in many fields like aquaculture, water treatment, environmental monitoring, river regulation, and so on

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Hangzhou Lohand Biological Technology Co.,Ltd

Zhejiang, China

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A new type of waterproof water treatment instrument satisfies the demand of most users with a high rate between price and performance. There are three types: portable dissolved oxygen (DO) meter LH-D9, portable PH/ORP meter LH-P5, portable conductivity meter LH-C6 with the classification of waterproof IP67, and shockproof design. It is suitable for the fields of monitoring under rugged environments and underwater works.

Parameter:

DO meter
Mode	Saturation%	Oxygen (Mg/L)	Temperature
Range	0 to 199.9	0~19.99	0.0-50.0℃(32-122℉)
resolution	0.1	0.01	0.1℉(0.1℃)
Accuracy	±1.5% FS	±1.5% FS	±0.9℉(±0.5℃)
Responding Time	1min	1min	1min
Calibration	At most 2 points
Temperature Compensation	Auto (ATC) from 32-122℉ or 0-50℃
Operating Temperature	32-122℉(0~50℃)
Battery	2*AA
Probe	Plastic electrode

Operation processes:

Calibration

1. Turn on the meter or return to the Measurement Mode.

2. Select % Mode and Immerse the DO probe in the zero-oxygen solution until READY shows.(Get high accuracy, please immerse the probe for 3min or longer. The next steps must be performed only when the expectation value will be below 5%.)

3. Press MODE a few times until the Calibrating is flashing on the Second Display, press HOLD/SET to enter Calibration Mode. (Calibrating stop flashing)

4. The meter will automatically recognize the standard solution and automatic calibration. During this process, the calibration value will be shown on the Second Display.

5. After Calibration, the meter automatically returns to Measurement Mode.

100% Calibration

In the Measurement Mode

1. Turn on the meter or return to the Measurement Mode.

2. Select % Mode and Place the probe at 1cm above the liquid until READY shows.(Get high accuracy, please keep the probe for 1min or longer .)

3. Press MODE a few times until the Calibrating is flashing on the Second Display, press HOLD/SET to enter Calibration Mode. (Calibrating stop flashing)

4. The meter will automatically recognize the standard solution and automatic calibration. During this process, the calibration value will be shown on the Second Display.

5. After Calibration, the meter automatically returns to Measurement Mode.

At most 2 points calibration: 0% and 100%, when the solution cannot be recognized, show “Err” for 2s. Then automatically returns to Measurement Mode.

NOTE: For 100% calibration, the air calibration way is a simple, quick, approximate method. (For high accuracy, we recommend that users should regularly calibrate. In the following situation, users must recalibrate meters.)

Replace probe after measuring aggressive chemicals

A Portable DO meter can test the dissolved oxygen in water, which is used in many fields like aquaculture, water treatment, environmental monitoring, river regulation, and so on.