Water cooled high-temperature concentration meter - Explanation

General fault diagnosis and troubleshooting

When there is no signal output from the concentration meter, the first thing to check is whether the extended cable is broken or short circuited, or whether the working voltage of the concentration meter is normal

2. If there is suspicion of a malfunction in the concentration meter, the following methods can be used to check and determine. Remove the concentration meter and measure the concentration of water and a certain concentration of medium separately. Use a multimeter to measure the mA current range. The blue electronic wire: 4-20 outputs positive and the yellow electronic wire: 4-20 outputs negative. The current signal should be 4mA, and the current output corresponding to the measured medium is normal. Otherwise, the concentration meter is faulty.

Concentration Meter User Manual Shanghai Chaohui Pressure Instrument Co., Ltd

maintenance

Regular/scheduled maintenance (can be operated through a cleaning device): wipe the glass of the concentration meter probe clean, add 0.3mL of tap water, and if the test value is not equal to 4mA, short-circuit the reset line to reset.

The concentration meter used for measuring high temperature, corrosive media, or operating under vibration conditions should be calibrated every six months. After 5 years of operation, the concentration meter should undergo an insulation resistance test, and the insulation resistance should be above 500M Ω.