SUP-DM2800 Dissolved Oxygen meter
SUP-DM2800 Dissolved oxygen is the measure of oxygen dissolved in an aqueous solution. Polarographic measurement principle, the dissolution value depends on the temperature of the aqueous solution, pressure and salinity in solution. The meter uses a liquid crystal display for measuring and displaying DO and medium temperature values, with analog and digital signal outputs and control functions.
- Description
- Installation
- Order lnformation
Installation
Host is fixed: the transmitter can be Paneled, Piped, wall-mounted installation.
Panel installation: requested to stay in the power distribution box on the Panel 138X138mm Square hole, the transmitters are attached to cage back into, and 4 M5 tighten screws.
Tested units |
% / ppm / mg/l / TEMP. |
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Range |
% |
0～600 %（According to the electrode） |
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mg/l |
0～60.00 mg/l（According to the electrode） |
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ppm |
0～60.00 ppm（According to the electrode） |
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TEMP |
0～100°C（According to the electrode） |
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Resolution |
% |
0.1 % |
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mg/l |
0.01 mg/l / 0.001 mg/l |
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ppm |
0.01 ppm / 0.001ppm |
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TEMP |
0.1C |
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Accuracy |
% |
±0.5% of reading ±1Digit |
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mg/l |
±0.5% of reading ±1Digit |
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ppm |
±0.5% of reading ±1Digit |
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TEMP |
±0.2°C± 1Digit with temperature correction |
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Temperature compensation |
0～50°C NTC30K/NTC22K automation compensation |
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0～50°C manual temperature compensation |
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Salinity compensation |
0.0～45.0 ppt manual compensation |
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Pressure compensation |
Compensation range：0.500～2.500bar or 7.25～36.25psi manual adjustment |
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Calibration mode |
Single point or two points calibrations |
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Working environment temperature |
0～50°C |
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Storage environment temperature |
-10～70°C |
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Display |
Large backlight LCD display, automatic and manual backlight sensor selection |
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Output current 1 |
Isolation-programming 4~20mA corresponding Dissolved oxygen Measuring range, maximum load 500 W |
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Output current 2 |
Isolation programming 4~20mA corresponding the temperature range, Max. load 500 W |
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Communication interface |
— |
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Relay control |
Contact output |
RELAY ON/OFF ，240VAC 0.5A Max. |
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Setting |
Set of two independent HI/LO Control point , Hysteresis setting |
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Cleaning setting |
ON 0~9999 seconds / OFF 0~999.9 hours |
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Protection level |
IP65 |
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Power supply |
100V~240VAC±10%，50/60Hz |
20V~40VDC, Imax.=0.5A |
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Installation methods |
Wall mounted/ Piped / Paneled |
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Meter size |
144 mm ´ 144 mm ´ 115 mm (H´W´D) |
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Hole size |
138 mm ´ 138 mm (H´W) |
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Weight |
0.8Kg |
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Wiring Method
Calibration note of dissolved oxygen meter
1. To make a calibration please read the manual carefully before calibration and electrode manual tells completed related to electrode polarization, zero point calibration and calibration notes in the air.
2. For calibration please select % or mg/L . One point calibration suggested the use of % calibration in the air.
3. Making one point calibration, you only need to calibrate the slope of the electrode. Under normal circumstances you can simply make one point calibration.
4. Carry out two-point calibration, calibration in an oxygen-free environment is required for electrode zero point, calibration the slope of the electrode in the oxygen-saturated environment.
5. Preparation of oxygen-free water: Configuring 250mL 5% sodium sulphite solution, you can also add a small amount of cobalt chloride as the catalyst.
6. Oxygen-saturated environment: taking distilled water 300~500mL, in relatively stable at an airborne averment at a temperature of at least 30 minutes.
7. the different brands of electrode calibration are slightly different.