H75.0.01.6C-02
User’s guide GPH 114
Page 7 of 8
6 Points to be observed during measuring
The electrode is equipped with a storage bottle.
The bottle has to be pulled off before measuring.
Then it is best to rinse the electrode with tap water.
As resistance values (resulting from both the pH
electrode and from the measuring device) are generally very high when conducting pH measurements, the
electrode should not be hand-held but put down during the measuring operation in order to avoid a shift in
voltage parameters between the electrode and the measuring device.
In case there is no suitable place where to position the device during measuring, we recommend that the
device is held as far away from the plug as possible and that there is as little movement as possible. Holding
the electrode in one hand and the device in the other, could also help to minimize a shift in voltage
parameters.
Make it a rule never to touch the device near the sensor plug as your hand may cause electrostatic coupling
resulting in measuring inaccuracies. Sudden jumps and changes in the values given on the display when
touching or shaking the plug are not normally due to a loose contact in the plug but result from electrostatic
changes caused by interference from hand contact.
7 Reshipment and Disposal
7.1 Reshipment
DANGER
All devices returned to the manufacturer have to be free of any residual of measuring media
and/or other hazardous substances. Measuring residuals at housing or sensor may be a risk for
persons or environment
Use an adequate transport package for reshipment, especially for fully functional devices.
Please make sure that the device is protected in the package by enough packing materials.
7.2 Disposal instructions
Batteries must not be disposed in the regular domestic waste but at the designated collecting
points.
The device must not be disposed in the unsorted municipal waste! Send the device directly to us
(sufficiently stamped), if it should be disposed. We will dispose the device appropriate and
environmentally sound.
8 Specification
Measuring ranges
0,00 ... 14,00 pH
Resolution
0,01 pH
Accuracy (only device)
± 0,02 pH ± 1 Digit (at nominal temperature = 25°C
Working conditions
0 to 45 °C; 0 to 80 % r.F. (non condensing)
Storage temperature
-20 to 70 °C
Connection
BNC bayonet
pH-electrode
GE 114 (standard electrode, incl. In scope of supply), combined measuring
and reference electrode with gel-electrolyte. Measuring range: 0 to14 pH,
temperature 0 to 90°C conductivity >200
μS/cm
Input resistant
approx.10
12
Ohm
Display
3 ½ digit, approx. 13 mm high LCD
Calibration
3 turning knobs for: 1. temperature compensation 0 to 90°C, 2. pH 7-value
and 3. pH X-value (e.g. pH 1,09, pH 4, pH 10 or pH 12, depending on working
environment)
Dimensions H*W*D
119 x 69 x 33 mm
Weight
Approx. 210g (incl. battery und electrode GE 114)
Power supply
9V-battery, type IEC 6F22 (incl. in scope off supply)
Battery service life: approx. 200 hours
Change battery indicator
Automatic: ’bAt ’displayed in case of low battery voltage
EMV
The device corresponds tot he essential protection ratings established in the
Regulations oft he Council fort he Approximation of Legislation fort he
member countries regarding electromagnetic compatibility (2004/108/EG).
Additional error < 1%
picture with storage bottle
picture without bottle
