pH CONTROLLER CP-421
CP-421 is a simple and accurate stationary device used for continuous pH and temperature measurements in clean water or sewage. The controller is available in three versions:
- equipped with two relays;
- equipped with 0 ÷ 20 mA or 4 ÷ 20 mA current loop;
- equipped with RS-232 output – current results may be stored in PC memory with use of delivered software
Characteristic features:
- Meter is equipped with backlit LCD display.
- The device has an automatic temperature compensation system.
- Controller enables 3-point calibration of the pH electrode in buffer solutions of values: 4.00, 7.00 9.00 pH or (optionally 4.00, 7.00, 10.00 pH).
- Autimatic detection of the buffers' values.
- It is possible to calibrate it without the need of disconnecting the outputs.
- Powered by 12 V adapter.
- Equipped with a hanger for mounting on a wall.
- 24 months of warranty.
- Quick warranty and after-warranty repair service.
On special order available meter which may collect up to 8000 data sets with chosen time interval. The available values of the interval are 1, 2, 5, 10, 15, 30 and 60 minutes.
If the memory capacity is used up the oldest result is deleted and replaced with a new one. The collected or actual results may be transferred to a PC with use of the USB connector. Delivered in the set software enables the transmission of data including measured result, measured temperature, time and date. Stored results can’t be viewed on the meter’s display, except the minimal and maximal values in given time.
Depending on working conditions, the appropriate type of pH electrode may be chosen and built-in the flow or immersible head. In case, when the distance between the electrode and the controller exceeds 10 m, it is necessary to use an additional preamplifier mounted inside the immersible head or next to the flow head.
TECHNICAL DATA
| Function | pH | Temperature |
|---|---|---|
| Range | 0.00 ÷ 14.00 pH | -50.0 ÷ 199.9 °C |
| Resolution | 0.01 pH | 0.1 °C |
| Accuracy (±1 digit) | ±0.01 pH* | ±0.1 °C** |
| Temp. compensation range | -5 ÷ 110 °C | - |
| Input impedance | >1012Ω | - |
| Memory*** | 8000 data sets collected with chosen time interval | |
| Relay's parameters | 2A/250VAC/30VDC | |
| Isolation class | according to PN-83/T-06500 | Radio electric interference | N level |
| Power supply | 12 V / 100 mA power adapter | |
| Weight | 210 g | |
| Dimensions (mm) | L = 149, W = 82, H = 22 | |
| * | The accuracy of the meter only. |
| ** | The accuracy of the meter only. The total error includes the meters and probe's accuracy. In the range 0 ÷ 100 °C the acceptable error of the probe with Pt-1000B resistor: ±0.8 °C , with Pt-1000A resistor: ±0.35 °C. |
| *** | Model with memory available on special order. |