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ZRN-PH-A type PH meter, pH meter
bargain
add to cart Main features
• interference current output
ZRN-PH-A type PH meter, pH meter is our newly developed products. Similar products in almost all of the current output instability issues ( 430P325 chip to do the most prominent table ), Especially where there is an environment where the drive or PLC using the current output is always fluctuating, unable to stabilize my company ZRN-PH-A type Type instrument using the new circuit, and high-speed optocoupler isolation technology, completely solve the current output instability.
Second, the technical parameters
| skills requirement | Related parameters |
| Measuring range | -4.00 ~ 18.00pH or -1999 ~ + 1999mV |
| Resolution | 0.01 pH; 1mV |
| level | 0.05 |
| stability | ≤0.02pH / 24h; ≤1mV / 24h |
| pH calibration range | Zero: ± 1.50pH slope: ± 30% |
| pH standard solution | 6.86 / 4.00 / 9.18 or 7.00 / 4.01 / 10.00 (meter automatic recognition) |
| ORP standard solution | Any standard solution |
| Control range | 0 ~ 14.00pH; -1999 ~ + 1999mV |
| Control output | ON / OFF relay outputs (four groups) |
| Operating Voltage | 220V AC ± 10%, 50 / 60Hz |
| Dimensions | 96 * 96 * 125 mm |
| Relay under load | Maximum AC 220V 5A |
| Current output load | 0~500W |
| Signal Input impedance | ≥1*1012W |
| Meter installation | Indoor flush mounting (panel mount) |
| Electrode installation | Buried, pipeline, suspension |
| output signal | Output range is adjustable, reversible, optical coupler isolated two 4 ~ 20mA 0.00 ~ 14.00pH corresponding output of 4 ~ 20mA (default setting) -1000 ~ + 1000mV corresponding output of 4 ~ 20mA (default setting) 0.0 ~ 100.0 ℃ corresponding output of 4 ~ 20mA (default setting) |
| The working conditions of the instrument | Ambient temperature: -5 ~ 55 ℃, no direct exposure to the sun; Relative humidity: ≤90%; In addition to the Earth's magnetic field, has no strong magnetic interference around; No high-frequency power supply harmonic interference. |
• A key to restore factory settings
When unable to confirm the user manipulate the data or the meter calibration data set is correct, press and hold the REL key to turn on the meter display after F1, the instrument will return to the factory settings ( This feature is only Beijing in REpower instrument has) .
• a variety of special function settings
2011 ZRN-PH-A type of PH / ORP controller settings with a variety of features, in addition to the current table do 430P325 chip containing the function, but also has as Fixed-line value , reset , Four relay control , Temperature display And many other special features settings.
• Key operation audible feedback
ZRN-PH-A type PH meter / ORP controllers in addition to the old section of the key audio feedback, but also increased the feedback highlighted in blue LED light effect; in some of the larger noise industrial applications, its advantages more prominent.
• Programmable analog output range
2011 ZRN-PH-A type of PH / ORP controller comes standard with a set of 4 ~ 20mA output, and optional two 4 ~ 20mA output; two current output can be programmed to set the output range is factory set to 0.00 ~ 14.00pH or -1000 ~ + 1000mV corresponding output of 4 ~ 20mA, temperature output is 0.0 ~ 100.0 ℃ corresponding output of 4 ~ 20mA; and two outputs can be set to reverse output (20.00 ~ 4.00mA).
• Two independent relays hysteresis
2011 ZRN-PH-A type of PH / ORP controllers designed with two separate sets of relay hysteresis, solves a hysteresis control in different conflicts, high and low points have a different amount of hysteresis, respectively, Hd and Ld.
• Optional four relay outputs
2011 ZRN-PH-A type of PH / ORP controllers Up Optional Four relay control, control up to six dosing device.
• Compatible with multiple electrode
video conference All pH with a high / low impedance output / ORP electrode can be connected to the 2011 ZRN-PH-A type of PH / ORP controller on, ZRN-PH-A can be accessed only Beijing in REpower Instrument PH or ORP electrode, an electrode can be connected to other brands, may also be connected to PH antimony electrode, converted to antimony electrode pattern after the meter automatically subtract antimony electrode errors. In addition, the 2011 ZRN-PH-A type of PH / ORP Controller but also external 2-wire / 3-wire Pt1000 temperature probe.
• User-friendly interface design
The instrument user friendly interface. Blue and white LCD display ; Two operating keys;. Four function keys LCD displays pH / ORP, temperature and various error messages and the like.
• After boot automatically detect data
When turned on each meter will automatically detect the data stored is within the normal range, if not in the normal range, will automatically revert to the factory settings, ensure that the instrument can be used without an error.
Third, the same type of product comparison
| product Features | 2011 ZRN-PH-A | 430P325 chip instrumentation |
| Reverse current | Have | Have |
| Temperature display | Have | no |
| Temperature current output | Optional | no |
| Current output settings | Optional | no |
| Four relay | Optional | Have |
| Choose standard solution | Have | Have |
| Antimony electrode function | Have | Have |
| reset | Have | no |
| Fixed-line value | Have | no |
| Cycle key operation | Have | no |
| POST recovery | Have | no |
| Manual temperature compensation | Have | no |
| The latest upgrade | Have | no |
| Automatic cleaning electrode | Optional | no |
| Ion concentration conversion | Optional | no |
Note: In terms of single-chip, 430P325 than 51 series, but the current market 430P325 instrument made only a dozen years ago, outdated technology, and the vast majority are stealing other people's technology, research and development capabilities, if they did not supply. Suppliers stock, manufacturers can only downtime to be expected, no other chips to be replaced. There are more than a dozen multinational corporations worldwide production 51 series, chip out the problem does not exist. and there are a variety of imported water quality analysis instruments use 51 series microcontroller, such as hashing, Milton and other products.
Fourth, the application of occasions
Environmental protection, sewage treatment, flue gas desulphurization control, or electroplating wastewater plating process measurement and control, pH control pharmaceutical production, aquaculture PH value detection and control, chemical, food, medical, health, thermoelectric, paper, bio-engineering, fermentation technology, textile , petrochemical and other industries.
