pH – Regler PHR-7W

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

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 db Data Sheet (german)
  be Description (german)
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