MACHEREY-NAGEL PF-12 Plus Handbuch Seite 51

11.2.8 Signal tone (Method 961)
Use /
11.2.9 20–80 % range (Method 957)
Use / to turn the 20–80 % range bar on or off and press
the 20–80 % range will be displayed at every measurement and provides information on where
the result lies in relation to the measurement range. If the measured value is located in the
thickly marked area of the measuring range bar, measured result is outside the 20–80 % range.
In this case the sample either has to be diluted or a test kit with a different measurement range
has to be used.
11.2.10 Turbidity control (NTU-Check) (Method 958)
Use /
firm. An input mask for entering the turbidity warning limit appears. Enter the desired
numerical value using the keyboard and confirm with
nephelometric turbidity of the sample is determined parallel to each measurement. If the limit
value entered is exceeded, an exclamation mark is displayed to the left of the measured value
as a warning. The measured turbidity can be displayed after a measurement by pressing the
key.
11.2.11 Filter 8
Enter the wavelength of the special filter using the keypad and press
This configuration can only be performed in the service mode. To calibrate the special
filter insert the calibration tube (see scope of delivery) and press
the entry of the special filter. Press
11.2.12 AUTO-OFF (Method 953)
Use /
off of the instrument after the last action. The following options are possible: Off (the in-
strument is not turned off automatically), 5 min (default setting), 10 min, 15 min, 20 min, 60 min.
Press to confirm.
11.2.13 SYSTEM-RESET
This configuration can only be made in the service mode. After an additional security
confirmation, the photometer performs a SYSTEM-RESET, thus restoring the state of
delivery.
When the SYSTEM RESET is executed, all measured data is deleted. Save your
measurement data and your special methods if necessary.
to turn the signal tone on or off and press
to turn the turbidity control (NTU-check) on or off and press
to reset the settings.
to adjust the AUTO-OFF time option, which affects the automatic switch
Manual Photometer PF-12
. When this function is enabled, the
NOTICE
Plus
EN, V2.00, 08.2021
to confirm.
to confirm. When enabled,
to confirm.
. Confirm with
to con-
to store
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