Explosion proof integrated conductivity meter

Principle of explosion-proof conductivity measurement：

To avoid electrode polarization, the instrument generates a high stability sine wave signal applied to the electrode. The current flowing through the electrode is proportional to the conductivity of the measured solution. The instrument converts the current from a high impedance operational amplifier to a voltage signal, which is amplified by a programmable signal, phase sensitive detection, and filtered to obtain a potential signal reflecting the conductivity; The microprocessor alternately samples the temperature signal and conductivity signal through switch switching, and after calculation and temperature compensation, obtains the conductivity value and temperature value of the measured solution at 25 ℃. Temperature compensation principle: The conductivity of electrolyte solution is affected by temperature changes and requires temperature compensation. Generally speaking, the temperature coefficient of weak aqueous solutions is 2.00% ℃, and the higher the concentration, the smaller the temperature coefficient. The temperature coefficient for solutions with lower concentrations (1 µ S · cm-1) is not set at 2.00% ℃, but is set by the user within the range of 0.00-99.9%.

Explosion proof conductivity technology parameters:

At the bottom1) Measurement range: (Different electrodes are configured according to the requirements of the measurement range to determine the electrode constant, and the range is automatically switched)

Conductivity: 0-2-20 µ S·cm^－1 ，0～200µS·cm^－1

0～2000～20000～10mS·cm^－1，0～100mS·cm^－1

Wen Degree: 0-100 ℃

At the bottom2) Basic difference of electronic unit: conductivity: ± 0.5% F · S, temperature: ± 0.5 ℃

At the bottom3）Automatic temperature compensation range of electronic unit: 0-100 ℃ (reference temperature 25 ℃)

At the bottom4) Electronic unit automatic temperature compensation difference: ± 1% F · S

At the bottom5) Basic instrument error: Conductivity: ± 1.0% F · S, Temperature: ± 0.8 ℃

At the bottom6) Electronic unit stability: ± 0.2% F · S/24h

At the bottom7) Poor repeatability of electronic units: ≤ 0.2% F · S

At the bottom8) Electronic unit output current difference: ± 0.1mA

At the bottom9) Electronic unit output current: 0-10mAOr 4-20mA

At the bottom10) Electronic unit alarm error: ± 0.1% F · S

At the bottom11) Two sets of relay contacts: 3A/240VAC, 6A/28VDC or 120VAC

At the bottom12) Power supply: AC: 200-265V/50-60Hz; DC: 24V (DC ordering requires declaration)

At the bottom13) Power consumption: ≤ 3W

At the bottom14) Electronic unit weight (base type): approximately 600g

At the bottom15) The water sample pressure borne by the electrode: ≤ 0.6MPa

At the bottom16) Dimensions of electronic unit base: 96 (length) x 96 (width) x 125 (depth) mm

At the bottom17) Installation hole size for electronic unit base type: 91 × 91mm

At the bottom18) The hard pipe connecting short pipe is used to connect the inlet and outlet pipes of the flow cell (conductivity cell) equipped with conductive electrodes for installation,

At the bottomIt can be welded with a hard tube with an outer diameter of Ø 8; Alternatively, a short hose with an inner diameter of 8 can be used to connect the joint.

At the bottom19) Working conditions: Environmental temperature: -10~45 ℃; Relative humidity: not exceeding 90%.

Explosion proof conductivity functional characteristics:

※Intelligent type: using a single-chip microprocessor to complete conductivity measurement, temperature measurement, and automatic temperature compensation, etc;

※ Human computer dialogue interface: menu operation structure, users can operate according to the prompts on the screen;

Network based: capable of remote transmission, monitoring, and control;

※ Isolation output current: software selects 0-10mAOr 4-20mA output;

Measurement range: The upper and lower limit parameters corresponding to the output current can be freely set;

※ The upper and lower limit over limit alarms can be set arbitrarily, and over limit alarms will flash to indicate the measurement status;

※ Two sets of relay control, adjustable hysteresis, can be connected to external control equipment such as metering pumps and solenoid valves, and implement self controlI Control of dynamic drug addition, etc;

※ Self set password, users can set or modify their own password to prevent unauthorized personnel from entering and causing misoperation; And it can help you retrieve your forgotten instrument password; We also provide users with contact information for technical consultation and after-sales service;

※ It has the function of calibrating electrodes using standard solutions; Correction functions such as measurement errors;

According to the user's order statement, RS485//RS232 communication interface (communication protocol CD provided) can be provided;

According to the user's order statement, we can provide a 24VDC power supply;

According to the user's project requirements for export to foreign countries, the ordering statement can provide: English version including software menu, operation panel, manual, etc. of the instrument.