PHR-8E pH Controller
The PHR-8E pH controller is used to adjust or monitor a liquid solution for a prescribed pH range.
This unit is used for controlling neutralisation facilities, provided that the required external drive controllers or switching- and control-devices are connected.
The program sequence for the neutralisation or monitoring procedure is microprocessor - controlled and the user can select from among the basic functions of continuous dosing, program control, and drain control. The program control function can be switched between three-point control, pulse frequency, and pulse-width modulation. For recording purposes, the device is equipped with a freely configurable current output and with an RS-232 printer interface.
Multiple configuration and setting options enable the user to precisely adapt the unit to the given application.
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Technical Data |
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| Voltage supply | 230 VAC +5%/-10%, 50Hz |
| Fuse protection | 4 A mT |
| Power consumption | approx. 15 VA |
| Inputs | 5 x neutral NO switch to GND contact voltage approx. 10 VDC, I approx. 9 mA contact resistance, max. 1.5 |
| Electrode input | differential amplifier, Re > 5 x 1011 (per DIN 19265) asymmetrically fed to the input terminals for commercial single-rod measuring chains |
| Temperature sensor | PT100 in three-conductor configuration, temperature compensation in range from 0...120°C, temperature measurement from -50°C ... 150°C. resolution: 0.5K (rounded internally). |
| Relay outputs | 5 x NO contact neutral, max. 230 V AC, 2A 3 x changeover contact, neutral, max. 230 V AC, 2A |
| Data output | for standard RS-232 printer interface: 8-bit UART + start bit(0) + stop bit(1), 2400 Baud. |
| Current output | 0(4) ... 20 mA max. load 400 linearity: 0.5% FS |
| Voltage output | 0(2) ... 10 V min. 1 , linearity: 0.5% FS |
| Climatic Conditions | acc. to DIN EN 60204-1 ( 05-2010 ) |
| Ambient Temperature | operation: -20 ... +55 °C transport/storage: -25 ... +55 °C |
| Housing | control panel housing per DIN 43700 (IP40) with transparent cover up to IP65 in front of the control panel |
| Dimensions | W / H / D: 144 x 72 x 125 mm (incl. connector strip) mounting cut-out: w x H 137 x 67 mm |
| Download PDF |  Data Sheet (german) |
 Description (german) |
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| Accessories | pH single-rod measuring chain: EMK-12P: E1712 EMK-12PX: E1715 coaxial cable for pH measuring cell 5m (other lengths available on request): KC0019 |
| Ordering information | PHR-8E: E1843
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