Industrial pH/ORP measurement controller

Application:Industrial pH/ORP measurement controllerSuitable for water quality monitoring in fields such as chemical engineering, refining, metallurgy, pharmaceuticals, power plants, and environmental protection

Key Features:

1. It is controlled by a microcontroller and easy to operate; Features of disk mounted or wall mounted structure, easy to install, operate and maintain

2. Able to measure the pH value, temperature value (℃), and ORP value of water samples

3. Equipped with automatic slope calculation and automatic temperature compensation function

4. It has the function of automatically identifying three standard buffer solutions: 4.00, 6.86, and 9.18

5. It has isolated output (4-20) mADC signal, and the upper and lower output limits can be infinitely adjusted

6. Equipped with isolated RS-232 or RS-485 (optional) digital signal output

7. It has automatic upper and lower limit alarm functions, as well as power-off data protection function

8. It has the function of storing and querying measurement data, which can store 400 measurement data (including measurement values and storage time), and has data retention function

9.Industrial pH/ORP measurement controllerSet up six control relays, except for two for outputting upper and lower limit alarm signals, the other four relays are programmable and can be combined with their suction and release times to achieve automatic cleaning, automatic calibration, and other control functions of the instrument

10. The protection level of the electronic unit chassis is IP65, which can prevent water spray and dust intrusion

There are two ways to combine instruments:

a) PHG-217D pH/ORP measurement controller (suitable for situations where the distance between the measurement point and the instrument is large, with a maximum distance of 20 meters)

b) PHG-217D-1 pH/ORP measurement controller (suitable for situations where the measurement point and instrument are close)

Main technical indicators:

1. Measurement range:

ORP：（-1800～1800）mV

pH：（0.00～14.00）pH

Temperature: (-10.0~120.0) ℃

2. Basic instrument error:

ORP: ± 10mV ± 1 word

PH: ± 0.05pH ± 1 word

Temperature: ± 0.5 ℃± 1 word (0.0 ℃≤ T ≤ 60.0 ℃); Other range ± 1.0 ℃ ± 1 word

3. Stability of electronic unit: ± 0.02pH/24h

4. Input impedance of electronic unit: not less than 1 × 10⁺¹²Ω

5. Output current error of electronic unit: ± 1% FS; (* 750 Ω for large load)

6. Temperature of the tested water sample: (0-60) ℃

7. Isolation output signal: (4-20) mADC, * high load 750 Ω

8. Output upper and lower limits:

PH: Within the pH range of (0<~14.00), choose freely (with an output corresponding to a current of 4mA~20mA)

ORP: Choose arbitrarily within the range of (-1800~1800) mV (with an output corresponding to a current of 4mA~20mA)

9. Control accuracy: ± 0.1pH

10. Normal working conditions of the instrument

a) Environmental temperature: (-5~50) ℃;

b) Relative humidity: not exceeding 90%;

c) Power supply: AC voltage (220 ± 22) V, frequency (50 ± 0.5) Hz

d) There are no corrosive gases present in the surrounding air;

e) There are vibrations around that do not affect performance;

f) There is no electromagnetic interference that affects performance other than the geomagnetic field around.

11. Dimensions (length x width x height): 144mm x 144mm x 163mm Hole size: 138mm x 138mm

12. Weight: 2.5kg