H74.0.05.6C-06
Operating Manual GMH 3651
page 16 of 18
12 GLP
GLP (Good Laboratory Practice) includes regular check of devices and accessories. For oxygen
measurements it is highly important to ensure correct pH calibration. The device provides the following
functions to help with this.
The usage of the GLP functions is only reasonable if the sensor is not changed. Although all data is stored in
the device, it refers to the particular sensor.
12.1 Calibration interval (
[.INT
)
You can enter the interval after which the device reminds you to recalibrate in the configuration.
The interval times should be chosen according to the application and the stability of the sensor.
“CAL” flashes on the display as soon as the interval has expired.
12.2 Calibration storage (rEAd CAL)
The last calibrations are stored with results and date and can be read out.
Display calibration data:
Historical calibration data can be comfortably read out via PC software GMHKonfig and GSOFT3050 or
displayed directly at the device:
Press for 2 seconds
The display will show:
or
(configuration level)
Press several times until this is
displayed:
read cal. = “read calibration data”
Press shortly:
switch between
-
ELE[
= total electrode state evaluation in %
-
SL. 1
= Slope at 0% ... Air saturated water *
1)
-
SL. 2
= Slope at air saturated water ... 100% *
1)
-
Date + time display of data set
or
Change between the different calibration data sets
Abort calibration storage display
*
1
at 1 and 2-point calibration is SL.1 = SL. 2
at 3-point calibration there are different slopes for the referring range segments.
13 Alarm
(„AL.“)
There are three possible settings:
Alarm off (AL. oFF), on with buzzer (AL. on), on without buzzer (AL. no.So).
Following conditions will display an alarm, when the function is activated (on or no.So):
-
Value is below lower (AL. Lo) or above upper alarm rail (AL.Hi).
-
Sensor error
-
Low battery (bAt)
-
Err.7: System error (always with buzzer)
In case of an alarm and when polling the interface the “prio”-flag is set in the returned message.
14
Real Time Clock („CLOC“)
The real time clock is used for the logger and GLP functions: Recorded values are also containing the point
of time, when they were measured. Please check the settings when necessary.
If the battery was replaced the referring menu ‚CLOC‘ will automatically be started
1
2
3
4
5
6
ON
OFF
max
Store
CAL
min
Set
Menu
Quit
1
2
3
4
5
6
ON
OFF
max
Store
CAL
min
Set
Menu
Quit
1
2
3
4
5
6
ON
OFF
max
Store
CAL
min
Set
Menu
Quit
1
2
3
4
5
6
ON
OFF
max
Store
CAL
min
Set
Menu
Quit
1
2
3
4
5
6
ON
OFF
max
Store
CAL
min
Set
Menu
Quit
