Hach-Lange SI794 I User Manual - Manual (Page 77)

77
Information on Calibration
Calibration can be performed by:
• Entry of cell factor
• Determining the cell factor with a known calibration solution taking
account of the temperature
• Product calibration
• Zero calibration in air or with calibration solution
• Temperature probe adjustment
Note:
If measurements are performed in fittings with A < 110 mm,
be sure to choose a calibration beaker with the same cross-
section and of the same material (metal/plastic).
Important Note:
All calibration procedures must be performed by trained person- •
nel. Incorrectly set parameters may go unnoticed, but change the
measuring properties.
When another sensor is used, its sensor data (cell factor, transfer ratio, •
measuring frequency, temperature probe) must be entered in the
configuration menu before calibration.
Each time a new sensor is connected, the transmitter must be •
calibrated.
Exit Press cal to exit. The measured
value is shown in the main
display alternately with “Hold”,
“enter” blinks, Sensoface is
active. Press enter key to end
the Hold mode. The measured
value is dispålayed. The output
current remains frozen for
another 20 sec (HOLD icon on,
“hourglass” blinks).