Instructions

KBM-110 Maintenance | 7
B-H86.0.12.DB214-1.0 19 / 32
Ready-to-use buffer solutions in 250 ml dosing bottles with a dosing volume of 20 to 25 ml.
Prerequisite
– Plastic bottle
– approx. 100 ml of distilled water
– Buffer capsule
Instruction
Colour 10 °C 20 °C 25 °C 30 °C 40 °C
GPH 4.0 Orange 3.99 3.99 4.01 4.01 4.03
GPH 7.0 Green 7.06 7.01 7.00 6.99 6.98
GPH 10.0 Blue 10.18 10.06 10.01 9.97 9.89
GPH 12.0 White 12.35 12.14 12.00 11.89 11.71
Buffer capsules for 100 ml buffer solution
1. Fill a plastic bottle with approx. 100 ml of distilled water.
2. Open the buffer capsule carefully by twisting the capsule halves and pulling. It
should be ensured that nothing is spilled. They can also be used without opening
them; opening the capsules only reduces to time for dissolving.
3. Place the buffer capsule and its contents in the plastic bottle.
4. Wait at least 3 hours.
5. Shake well before using for the first time.
Outcome of an action
Then you can begin with calibration of the product.
7.3.1.3 Automatic pH calibration
Description
The following steps describe how to calibrate the product automatically.
Prerequisite
– The product is switched on.
– The pH electrode and, if applicable, a temperature sensor are inserted in the
product.
– Ready-to-use GPH 7.0 buffer solution.
– Ready-to-use GPH 4.0 or GPH 10.0 buffer solution.
NOTE
Automatic calibration can also be carried out with the pre-mixed PHL buffer solutions.
Since the temperature compensation relates to the GPH capsules, an error of a few
hundredths pH should be taken into account, depending on the temperature. Refer
also to the differences in the tables of the buffer solutions in Buffer solutions [}p.18]
and --- FEHLENDER LINK ---.
Instruction
1. Press the Function key for 4 seconds to open the Calibration menu. (AL appears in
the display.
2. Release the Function key.
3. PK 7 appears in the display.
4. Place the electrode in the GPH 7.0 buffer solution.
5. The product determines the correct value automatically. If the value is determined,
the display flashes and an acoustic signal is issued to indicate a change to the
next calibration point.
6. If the temperature sensor is not inserted, enter the temperature of the buffer solu-
tion by pressing the Up key and Down key and confirm the entry by pressing the
Function key again.
7. PK 4 and PK 10 alternate in the display.
8. Then, rinse the electrode with distilled or deionised water.