BUCHI Melting Point M-565 - Manual (Page 52)

8 Troubleshooting
52 Melting Point M-565 Operation Manual, Version D
8 Troubleshooting
The following section describes how to resume operation of the instrument in the event of any minor
problem. It lists some possible occurrences, their probable cause, and suggests how to remedy
the problem. The troubleshooting table below lists possible instrument malfunctions and errors and
describes courses of action that can be used by operators to correct some of those problems. The
appropriate course of action is listed in the column “Remedy”.
More complicated malfunctions or errors are usually handled by a BUCHI technical engineer who has
access to the official service manuals. In this case, please contact your local BUCHI customer service
agent.
8 .1 Malfunctions and their remedy
Table 8-1: General malfunctions and their remedy
Malfunction Possible cause Remedy
Instrument does not work Main switch off Switch on mains switch
Instrument is not connected to mains
supply Check mains connection
No or unreadable printout Not activated in the settings Activate automatic printout in the
settings
Bad cable connection Check cable connection
Printer switched OFF Switch ON printer
No paper Replace paper roll
Baud rate settings of printer faulty See section 8.1.1
No melting curve is shown Not activated in the settings Activate graphic in the settings
No automatic detection of samples Manually register the melting point/
boiling point
Measuring finished before detecting
a result for all samples Turn off in the settings “Stop after
detection” and check stop tempera-
ture.
In the automatic melting point deter-
mination, no value and no melting
curve are determined Sample is unstable, it decomposes,
turns brown, or melts non-uniformly
The temperature parameters have
been entered incorrectly and the
sample does not melt at all
Automatic detection is disabled
e.g. select higher maximum point
Enable the Automatic detection in the
Settings
Sometimes no results or only 1 or 2
results instead of 3 results START button was pressed before
insertion of all sample capillaries Put all sample capillaries in the oven
first, then press the START button.
Do not move the sample capillaries
again.
Unexpected results Sample-specific preparations:
Sample is not dry or is contaminated
by another substance
Sample should be dried before use