Greisinger GPH 014 User guide

H24.0.01.6C-07 page 1 of 4

Operating Manual for Digital-pH-Meter

GPH 014

Specification:

Measuring range: 0,00 to 14,00 pH
Resolution: 0,01 pH
Accuracy (device only): ± 0,02 pH ±1 digit (at nominal temperature = 25°C)
pH-electrode: pH-electrode GE014 (standard electrode, incl. in scope of supply),

plug in via front-side electrode socket (Cinch).
GE 014: combined measuring and reference electrode with refillable 3 mol-KCl-electrolyte.

measuring range: 2 to 12 pH, temperature: 5 to 45°C, conductivity: >200 µS/cm.
For permanent measurements in a highly alkaline environment, special electrodes have to
be used. (Please refer to special accessories)

Input resistance: approx. 10
Display: approx. 13 mm high, 3½ digit LCD
Working temperature: 0 to 45°C
Relative humidity: 0 to 80 % r.F. (non condensing)
Power supply: 9V-battery Type IEC 6F22 (included in scope of supply)
Battery service life: approx. 200 h
Low battery warning: Automatic; "BAT" displayed in case of low battery voltage
Dimensions: approx. 106 x 67 x 30 mm (H x W x D)
Weight: approx. 200g (incl. battery and electrode GE014)
Calibrating: 3 turning knobs for:

1. temperature compensation 0 to 90°C

2. pH 7-value

3. pH X-value (e.g. pH 1,09, pH 4, pH 10 or pH 12, depending on working environment)

EMC: The device corresponds to the essential protection ratings established in the Regulations

of the Council for the Approximation of Legislation for the member countries regarding
electromagnetic compatibility (89/336/EWG).
additional errorr: <1%

12

Ohm

Points to be observed during operation

a.) In case of low battery voltage "BAT" is displayed; make sure to exchange battery immediately as too low an operation

voltage may lead to incorrect measuring results.
We recommend to take out battery if device will not be operated for some time or storaged over 50°C.

Please note: If the battery voltage falls even lower the voltage may not be sufficient for "BAT" to be displayed so that

there will be no "BAT" indication although the battery has been used up.
We recommend to make it a rule to always check the battery if the values indicated seem to be
completely out of range.

b.) Make sure to maintain device an electrode properly and to operate it in accordance with the specification listed (do not throw,

knock etc.).

c.) The electrode must be stored in 3 mol/l KCl (ours type: KCl3M), in order to avoid drying out (excluded GE103).

d.) Before measuring the protection-cap has to be removed.

e.) Our pH-electrodes can be used in a degree range from 90° to ±45° compared to horizontal

Disposal instruction:

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.

GREISINGER electronic GmbH

Fon: 0049-9402 / 9383-0

D - 93128 Regenstauf, Hans-Sachs-Straße 26

Fax: [phone] / 9383-33

H24.0.01.6C-07 page 2 of 4

Safety Requirements:

This device has been designed and tested in accordance with the safety regulations for electronic devices.
However, its trouble-free operation an reliability cannot be guaranteed unless the standard safety measures and special
safety advises given in this manual will be adhered to when using the device

1. Trouble-free operation and reliability of the device can only be guaranteed if the device is not subjected to any other
climatic conditions than those stated under "Specification".

2. If the device is transported from a cold to a warm environment condensation may cause in a failure of the function. In
such a case make sure the device temperature has adjusted to the ambient temperature before trying a new start-up.

3. If there is a risk whatsoever involved in running it, the device has to be switched off immediately and to be marked
accordingly to avoid re-starting.

Operator safety may be a risk if:

- there is visible damage to the device

- the device is not working as specified

- the device has been stored under unsuitable conditions for a longer time.

In case of doubt, please return device to manufacturer for repair or maintenance.

4. Attention: Do NOT use this product as safety or emergency stopping device, or in any other application where failure of
the product could result in personal injury or material damage.

Failure to comply with these instructions could result in death or serious injury and material damage.

5. The electrodes contain 3 molar KCL (GE103: 1mol/l KNO3), which is acidly.

First-Aid-provisions

After contact with skin: clean with sufficient water.
After contact with eyes: rinse opened eye with sufficient water, contact oculist
After swallowing: drink much water. When feeling sick, contact doctor.

Calibrating of ph-Meter:

Accessories required: calibrating solution for ph7 and ph4 (respectively special accessories ph10, ph12)

How to prepare a calibrating solution:

- fill 2 plastic bottles (special accessories) with 100 ml distilled water (eg battery water) each.
(100 ml will cover the entire cylindrical area, ie approx. 55 mm as of bottle base).

- open ph7 capsule (green) carefully (turn one half of the capsule while pulling and make sure not to spill any solution);
put content (including both capsule parts) into one of the bottles.

- place second capsule for ph4 (orange) respectively ph10 or ph12 including both capsule parts, in second bottle.

The capsule will imbue the liquid with the respective characteristic colour:
orange = ph 4,0; green = ph 7,0, blue = ph 10,0, colourless (white capsule) = ph 12.0

Make sure to prepare buffer solutions in time as they can only be used after 3 hours. Shake well before use.

Calibration of pH-meter:

In order to ensure optimum measuring accuracy, the calibration range should be larger than the measuring range. We
recommend using the following calibration solutions for measurements.

less than pH 7: pH 4,0 and pH 7,0
more than pH 7: pH 7,0 and pH 12,0

Plug in Cinch plug of pH-electrode into corresponding socket and switch on device by means of the lateral slide switch (a
number with decimal point will be displayed on the LCD).

Determine temperature of buffer solution and set accordingly using the central turning knob (controller for temperature
compensation 0 to 90°C): 1 graduation mark = approx.10°C.

Place GPH014 meter on a solid surface; if possible try to avoid holding the meter in your hand during calibration (please refer
to "Points to be observed during measuring").

Setting of the first calibration point:

Carefully remove protection cap from electrode. (Attention: cap contains 3 mol/l KCl).
Rinse electrode with distilled water, dry electrode, place it in buffer solution pH 7.0.

Wait for approx. 20 to 30 seconds (for display to show stable value), then use turning knob at the far right side (pH 7) to set
value to 7.00.

Setting of the second calibration point:

Rinse electrode with distilled water once again, dry electrode, place it in buffer solution pH 4.0.
Wait for another 20 to 30 seconds (for display to show stable value), then use turning knob at the far left side (pH X) to set
value to 4.00.