8711 pH regulator
direct connection to pH electrodes / 4-20 mA analog output / Front panel with IP44 protection / 2 control relays and 1 alarm relay / fixed or automatic temperature compensation

The 8711 pH regulator is a three-point discontinuous pH regulator which has been designed to be installed in control cabinets. The 8711 pH regulator can be used in many industrial sectors as well as for research. The regulation of the pH value is carried out through two dosing relays which are connected to a metering pump or to a magnetic valve for the acid or the base. The pH electrode is directly connected to the 8711 pH regulator. The maximum cable length is 10 m. For longer distances the analog input(4-20 mA) can be used. In this case, it is necessary to install a transducer in the measurement place. This transducer will convert the pH value into a 4-20 mA signal. The 8711 pH regulator is handled by the front panel keys (these keys are protected). Measured values are shown on a LCD display. The front LEDs shows the user the mode in which the 8711 pH regulator is operating. The working mode can be additionally selected through a switch. There are three modes available: On, Off and auto modes. Additionally, built-in test functions allow the user to get fast checking of both sensor and internal electronics. To transfer the pH value to a display system or other process systems, the 8711 pH regulator has an analog output (0/4-20 mA). The polystyrene cover (IP44) at the front panel, offers protection when the device is used in adverse industrial ambient. At the following link you will find an overview of the pH regulators available at PCE-Instruments.

View or print user's manual of the HI 8711 pH regulator

- Setting of the maximum dosing time
- Input resistance: 10¹²Ω
- Three-point regulation

- 4-20 mA input
- 2 control relays and 1 alarm relay
- Direct connection to pH electrodes

Technical specifications

Measurement Range

-2.00 ... 16.00 pH

Resolution

0.01 pH

Accuracy

±0.02 pH ... 100 ºC)
±0.05 pH (-20 ... 0 ºC)
Analog input: ±0.05 %

Resistance

10¹²Ω

Analog input

4-20 mA

Power supply for the amplifier electrode

±5 V, 150 mA

Calibration

Absolute zero:± pH 2
Transconductance: 80 to 110 %

- Automatic compensation

Control mode

3 point regulation

Display

LCD display

Analog output

Control relay

Alarm / control relay

Operation modes

OFF, AUTO, ON

Maximum dosing time

5 to 60 minutes

Temperature

Humidity

Case

black anodized aluminum
(ABS in back and front)

Dimensions

72 135 mm

Panel-mount dimensions

Protection

Weight

Power supply voltage

Delivery contents
1 x HI 8711 pH regulator and user's manual

Contact:
PCE Instruments UK Limited
Unit 11 Southpoint Business Park
Ensign Way, Southampton
United Kingdom, SO31 4RF
Phone: +44(0) 23 809 870 30
Fax: +44(0) 23 809 870 39

Contact:
PCE Americas Inc.
1201 Jupiter Park Drive, Suite 8
Jupiter 33458 FL
USA
Phone: +1-410-387-7703
Fax: +1-410-387-7714

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Below you will find an overview of the different product groups of measuring instruments