Greisinger GMH 3530 pH measurement equipment 600425 Data Sheet
Product codes
600425
H33.0.02.6C-09
Operating Manual GMH 3530
page 6 of 14
’Address’: Selection of Base Address
01, 11, 21, ..., 91:
Base address for interface communication. Channel 1 will
be addressed by the base address set, channel 2 and 3 will
have the following addresses.
(Example: base address 21 - channel 1 = 21, channel 2 =
22, channel 3 = 23)
be addressed by the base address set, channel 2 and 3 will
have the following addresses.
(Example: base address 21 - channel 1 = 21, channel 2 =
22, channel 3 = 23)
Using the interface converter GRS3105 it is possible to connect several devices to a single interface. As a precondi-
tion the base addresses of all devices must not be identical. In case several devices are connected via one interface
make sure to configurate the base addresses accordingly.
tion the base addresses of all devices must not be identical. In case several devices are connected via one interface
make sure to configurate the base addresses accordingly.
7
Manual Setting of Temperature
when operating device without temperature probe
When operating in pH, mV
H
or rH mode, the device requires the temperature of the liquid being measured.
We recommend using a temperature probe (which will be automatically detected); the measured temperature will be
used to calculate the measuring values (ATC: automatic temperature compensation).
used to calculate the measuring values (ATC: automatic temperature compensation).
If no temperature probe is connected, temperature may be entered manually:
To do so press the
To do so press the
-key shortly.
0 ... 105 °C:
Input of temperature of liquid
Use the
-key to acknowledge input; device returns to measuring mode.
8
Manual Setting of pH-Value
for measuring function rH
Running the GMH 3530 in the rH-measuring mode requires both temperature and pH value. Press
shortly again
to switch over to the pH-value entering mode:
0.0
… 14.00 pH:
Input of pH-value
Use
-key to acknowledge input and to return to measurement.
9
Calibration of ’pH’-Measurement
The electrode data of pH-electrodes are subject to a lot of fluctuation due to ageing and manufacturing tolerances.
Therefore it is necessary to check the calibration with buffer solutions before measurements take place. If deviations
are too large, a recalibration is necessary.
Therefore it is necessary to check the calibration with buffer solutions before measurements take place. If deviations
are too large, a recalibration is necessary.
Buffer solutions are liquids with an accurate pH-value. The following buffers can be used for calibration:
- Standard-series (4.01pH, 7.00pH and 10.01pH)
- DIN-series (1.68pH(A), 4.01pH(C), 6.87pH(D), 9.18pH(F) and 12.45pH(G))
- Any buffer (neutral buffer ranging from 6.5 ... 7.5pH)
Service life of a buffer solution is limited and will be further reduced unless the electrodes are properly rinsed and dried
when changing over the solutions. This may even result in incorrect calibration! We recommend to use new buffer solu-
tion for calibration, as far as possible, and to rinse with non-ionising or distilled water.
when changing over the solutions. This may even result in incorrect calibration! We recommend to use new buffer solu-
tion for calibration, as far as possible, and to rinse with non-ionising or distilled water.
pH
mV
mV
H
rH
ATC
ok
CAL
AL Logg
pH
max
min
2
5
pH
mV
mV
H
rH
ATC
ok
CAL
AL Logg
pH
mbar
max
min
2
5
pH
mV
mV
H
rH
ATC
ok
CAL
AL Logg
pH
mbar
max
min
2
5