PHR-7W pH Controller
The PHR-7W pH controller is used to adjust or monitor a liquid solution for a prescribed pH range.
The unit is equipped with all the inputs and outputs necessary to independently control a neutralization system.
The program controller for the neutralization process is supported by the software and is selectable. The control function can be switched between three-point and pulse frequency operation.
For recording purposes, the unit is equipped with a freely configurable current output and optionally 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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| Power 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 potential difference 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...100°C, temperature measurement from -50°C ... 150°C. Resolution: 0.5K (rounded internally). |
| Relay outputs | 2 x phase-positioned (neutral possible) 6 x neutral, max. 230 V AC, 2 A |
| Data output (optional) | 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 Operating temperature -20 ... +55 °C |
| Housing | DIN plastic housing for wall installation IP54 |
| Dimensions | W / H / D : 243 x 193 x 116 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 5m KC0019 pH measuring cell (other lengths available on request) |
| Ordering information | PHR-7W E1745
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