Problems, Causes, And Correction - Macherey-Nagel PF-3 Manual

Ensure that there is no cuvette in the cuvette shaft.
The housing of the photometer can be cleaned with a damp cloth.
Immediately wipe off liquid contaminants from the device and clean the
housing as previously described. The cuvette shaft should be cleaned
using a soft, lint-free cotton cloth and then dried. The photometer and
cuvettes must always be kept clean. The cuvettes are cleaned with a
lint-free cloth.
Do not use any solvents to clean the housing and display.

15.2 Problems, causes, and correction

Malfunction of or damage to the device due to incorrect maintenance:
The maintenance of the device may be performed only by qualified
staff.
Various messages may be displayed, depending on the operating
status. The source of the error may either be incorrect operation or a
malfunction of the device.
If errors recur, contact MACHERY-NAGEL.
Error message
Display remains dark
Device does not work
when switched on
One or more buttons
cannot be operated.
The device displays
incorrect measured
values.
44
Reason
No power supply
Device has crashed
The keyboard is
defective.
The device
calibration must be
renewed.
The device filters are
soiled or defective.
Manual Photometer PF-3 EN, 04/2021
NOTE
NOTE
NOTE
Solution
Check whether disposable/
rechargeable batteries are
inserted/USB cable is connected.
Switch off device, wait 10 s,
switch device back on
Contact MACHEREY-NAGEL or
your responsible distributor.
Perform a device calibration
(see 12.8, page 40) and check
the device (see 13, page 42).
Contact MACHEREY-NAGEL or
your responsible distributor.