Hach-Lange BIOGAS User Manual - Manual (Page 41)

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Standard Operations
5.10.3.1 Edit a method
1. Enter the Method menu and press 5 (Method
library).
2. Press the validation key and select the method
to be edited from the list.
3. Press 2 Edit method.
Note: The RIGHT and LEFT arrow keys allow you to
move from one screen to the other.
4. Select the method mode. The modes available
are:
•
Measurement (pH, mV or mV at imposed
current)
• End point (titration to a preset mV or pH
end point)
• Coupled (methods chained in a same bea-
ker)
• Continuous IP (Inflection point detection
with continuous addition of the titrant)
• Monotonic IP (Inflection point detection
with incremental addition of the titrant,
increments of equal size)
• Dynamic IP (Inflection point detection with
incremental addition of the titrant, incre-
ments of varying size)
5. Select the measurement mode:
•
pH
• mV
• mV at imposed current.
6. Select Temperature.
•
If a temperature sensor is in use, select
Probe.
• If the temperature is entered manually via
the numeric keypad, select Entered.
• If the calibration is to be performed at 25°C,
select Fixed 25°C.
7. Enter the Number of tests, i.e. the number of
times the method is to be repeated.
8. Select the way the cell grounding of the
measuring electrode will be performed:
•
Reference: reference electrode connected
to the Ref socket on the titration system.
• Metal: metal electrode connected to the
GND socket on the titration system. For tit-
rations in very resistant medium.
• Other: an electrode which does not belong
to the electrode system.
9. If you want a message to be displayed upon
starting the method, select Notification = Yes
then enter the message (3 lines of 32
characters maximum).