product overview

Applied to production process control and bus monitoring in industries such as petrochemicals, pharmaceuticals, power generation, brewing, and fine chemicals

Can be equipped with extended cables or long guide rods made of PPR, stainless steel, stainless steel lining F4 and other materials, providing various installation forms such as pipe thread installation, flange installation, sanitary installation, etc., to meet the installation requirements of different application environments

Product parameters:

1.0 constant, applicable to 10μ Range of S/cm -20mS/cm

Electrode Material: Graphite

Liquid receiving material: PPS/PA、PP、 graphite

Equipped with Pt1000 temperature sensor (Pt100, RTD10K can be customized)

Installation method: 3/4 NPT

Connection method:

VP gold-plated plug/cable type/aviation plug optional

Suitable for measuring seawater, civil and industrial wastewater, and low concentration acid-base salt solutions

Principle of conductivity measurement:

Two mutually insulated electrodes form a conductivity cell, in which the electrolyte solution to be tested is placed and an electrical circuit is formed by applying a constant voltage alternating current. If the voltage and electrode size are fixed, the circuit current I is a linear function of the conductivity S: I0 = f(s) = KS+d

In the equation, K is the slope of the linear equation, which is related to the power supply parameters of the conductivity cell. Changing the power supply parameters can change the slope (measurement range). In the linear equation, since the output current range is specified, when S=0, the constant term d can be calculated to determine the current flowing through the test solution, and thus the conductivity of the test solution can be measured.

Conductive click material

Measurement electrodes with high conductivity, such as seawater and sewage, can cause serious electrode errors due to their large electrode constants, reduced electrode area, and increased current density. Choosing graphite electrodes with porous surfaces can effectively alleviate these problems. Meanwhile, graphite is a material with strong chemical stability, especially suitable for corrosive media such as chlorine.

Installation diagram of conductive electrode:

1. Wiring instructions

Wiring instructions for compact conductivity transmitter

Hosman plug wiring instructions

Please wire the Hosman plug according to the following diagram

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1. Unscrew the screw and pull out the plug upwards

2. Pry open the plug and follow the wiring diagram to connect the wires.

Aluminum alloy junction box wiring instructions?

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2. Verification

(1) Zero point verification

Clean and drain the conductive electrode with distilled water to expose it to the air. At this point, the theoretical conductivity should be zero, and the transmitter output should be 4mA. Otherwise, adjust the zero potentiometer and correct the deviation. If it cannot be adjusted, it indicates that the electrode is severely contaminated and should be cleaned.

(2) Full degree verification

Wash the electrode with a portion of the prepared standard conductivity solution before calibration. Example: If the range is 0-100 μ s/cm and a conductivity solution of 50 μ s/cm is configured, the theoretical value on the ammeter should be 16mA × 0.5+4mA=12mA. Otherwise, adjust the "full adjustment" potentiometer, correct the deviation, and calculate the instrument error based on the measured display current and theoretical current.

(Measure the actual value with a standard electrode, measure the same solution with an assembled electrode and a standard electrode, and the measured value should be within the error range.)

Attention: The product has been accurately calibrated at the factory and does not need to be re calibrated during installation. If measurement errors occur during use, they can be calibrated according to the above steps.

3. Installation and operation

When installing the transmitter, do not apply excessive force or collide violently to avoid damaging the electrodes. After wiring, it is necessary to carefully check to prevent incorrect connections. Only after confirming that there are no errors can the power be turned on. During the operation of the instrument, it is important to note that the conductivity cell must be filled with the measured solution. The accumulation of gas in the conductivity cell due to improper pipeline installation is an important cause of measurement errors.