13. Leave an empty sample tube in the freezing chamber to help avoid
having to clean out accidentally-introduced material.
The 4250 may be left on continuously. When idle for five minutes or
more, it automatically enters standby mode: the fan slows, the freezing
chamber warms slightly, and the display changes to the date and time.
The 4250 remains in standby mode until another test is needed. It auto-
matically exits from standby mode when any keypad is pressed.
Sample test errors
Occasionally, a test will not run to completion and your instrument will
display an error message. Refer to the Troubleshooting Table, Appendix
A at the end of this user’s guide for an explanation of a particular mes-
sage.
Changing operating settings
Your 4250 has been individually set up at the factory for normal opera-
tion, but SETUP may be required for changing the date and time, or
customizing the SETUP parameters for your own individual needs.
NOTE The Supervisor/Operator keyswitch must be in the
Supervisor position to enable
the use of the SETUP menu.
1. To access the setup menu parameters (see Table 3), enter the setup
mode by pressing the SETUP soft key while your instrument is dis-
playing “Cryoscope Ready” or the date and time.
2. When you press SETUP, the display will change to “Select Setup
Item”. There are two methods of selecting a particular item. You may
use the Select Startup Item function by pressing START, or you may
step through the options by pressing the < and > soft keys. If you
choose to directly select a startup item, the cryoscope
will display, “Setup Menu: # 0”. At “Setup Menu: # 0”, key in the
number of the item you would like to change, and press ENTER.
That item will be displayed.
25
Instrument Operation
To Next Page
Loading...
Need help?
General
