DO-6850

Q: What signal outputs does this controller have?

1) Isolated 4–20mA analog transmission for remote meter; 2) Two groups high/low 10A relay for auto equipment control; 3) Optional RS485 Modbus digital communication to PLC.

Q: How many types of DO sensors can it match?

Three types: polarographic probe (0–60℃), galvanic probe (0–60℃), high-temperature probe (0–100℃ optional). All probes use built-in NTC 10K for temperature compensation.

Q: How often to replace electrolyte and membrane cap?

Replace electrolyte every 6 months; replace membrane once broken. Re-polarize 30 mins and re-calibrate after replacement.

DO-6850

JIRS DO-6850 is an industrial panel-mount online dissolved oxygen (DO) monitoring & controller designed for continuous water quality measurement. Equipped with built-in NTC 10K automatic temperature compensation, large multi-data LCD English display, IP65 waterproof front panel, and complete signal output & relay control functions. It adopts imported core chips and supports three matched DO sensors (polarographic / galvanic / high-temperature type) to fit diverse water treatment working conditions.

Product Details

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Product Details

Introduction:

DO-6850 online Dissolved Oxygen Meter is that our company use introduction of foreign technology to produce intelligent dissolved oxygen detector, using imported components and dissolved oxygen membrane, based on the new polarographic analysis techniques, and advanced production technology and surface-mount technology.

Using this series of advanced analytical techniques to ensure that the instrument stable and reliable long-term work and accuracy. English menu, Notepad storage of measured data, 485 communications and other functions.

Widely used chemical fertilizer, metallurgy, environmental protection and water treatment engineering, pharmaceutical, biochemical, food, farming and running water, and the continuous monitoring of dissolved oxygen.

Main Characteristics:

The large LCD display, English menu operation.

Multi-parameter display at the same time: the value of dissolved oxygen, temperature, output current, alarm points, etc. Intuitive and easy to read, and alarm for range over run.

Screen displays alarm status and accompanied by a switch ON / OFF signal output.

Automatic Temperature Compensation: Automatic 0℃ to 60℃.

Communication function (optional): RS-485 communication interface (MODBUS protocol is partially compatible), 4 to 20 mA current output corresponding to the DO value can be set freely.

Notepad: can store 50 measurements, the user can record measurement data.

Hysteresis amount can be set freely to avoid frequent switching relay action.

Watchdog function: to ensure that the instrument will not crash.

Core devices from famous foreign brands.

Restore the factory settings. Power-down protection> 10 years.

Main Technical Index

Measuring Range	0.00 - 20.00 mg /L (ppm); 0 - 200.0 ug /L (ppd), (optional); 0-60℃, 0-100℃ (optional).
Resolution	0.1 ug/L, 0.01 mg/L, 0.1℃.
Accuracy	ug/L: ±1.0%FS； mg/L:±0.5%FS， ±0.3℃.
Display	Large Screen Multi-parameters LCD
Temp. Compensation	NTC 10K, 0.0℃-60.0 ℃, 0-100℃ (optional), Automatic temperature compensation.
Current output	isolation to protect , 4 ~ 20mA signal output.
Control output	two sets of ON / OFF relay contacts, divided into the high point, low alarm signal , optically isolated output.
Communication output	Standard Modbus RS485 function to PC (optional)
Contact capacity	10A/220V AC (Resistive Load)
Output load	load <500Ω (0-10mA), load <750Ω (4-20mA)
Power	AC 220V±10%, 50/60Hz
Working environment	Ambient Temp. 0-60℃, Relative Humidity ≤90%
Dimensions	96×96×115mm(H X W X D), 0.9kgs
Hole size	91×91mm （H X W)
Installation Mode	Panel Mounted
Protection grade	IP 65 Enclosure

DO-6850 with IP6 5Enclosure and back terminals:

A-PolographicDOsensor(0-60℃)

B-Galvanic DO sensor (0-60℃)

C-High temperature DO sensor (0-100℃)

Standard configuration

◇ One DO-6850 controller

◇One electrode, An alternate membrane, one bottle alternate electrolyte

◇ Two lock plungers

◇ Operation Manual

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FAQS

What signal outputs does this controller have?

1) Isolated 4–20mA analog transmission for remote meter; 2) Two groups high/low 10A relay for auto equipment control; 3) Optional RS485 Modbus digital communication to PLC.

How many types of DO sensors can it match?

Three types: polarographic probe (0–60℃), galvanic probe (0–60℃), high-temperature probe (0–100℃ optional). All probes use built-in NTC 10K for temperature compensation.

How often to replace electrolyte and membrane cap?

Replace electrolyte every 6 months; replace membrane once broken. Re-polarize 30 mins and re-calibrate after replacement.

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