Dimensions - Burkert 8205 Manuel D'utilisation

2 SPECIFICATION
pH transmitter 8205, separate, connection distance < 10 m
The separate 8205 transmitter, short distance, must be connected to a pH-sensor holder
8200 (Instruction manual ref. 428937) made up of an holder, a pH-electrode and usually a
Pt1000 temperature sensor.
The transmitter is available in a panel or a wall-mounted version.
The holder can be installed on any pipe thanks to the fittings S020.
Measuring Principle
The most important part of a pH electrode is the glass membrane of pH-selective glass.
When the electrode is immersed into the solution, an electrical charge caused by ions (H
generates a cell voltage between the glass membrane and the solution. This electrode
voltage is measured with reference to a reference electrode, located around the pH glass
electrode. The cell voltage of the combination electrode is directly proportional to the pH
value (59.16 mV per pH unit at 25°C).
The transmitter functions in a 2 wire circuit ( without relay) or 3 wire circuit (with relays) and
requires a power supply of 12...30 VDC (115/230 VAC in wall-moùnted housing).
A 4...20 mA standard signal proportional to the pH or to the T°C is available as output
signal.
2.4 Dimensions of the pH transmitter
88
76
Fig. 2.1 Dimensions pH transmitter 8205 panel-mounted version and drilling jig
PH TRANSMITTER 8205
41
25
E-4-
+ )
95
80
76
50