Advanced Instruments 4250, User Manual

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1. At “ Cryoscope Ready ”, press the TEST key and then the > key,
respectively.
2. Press START to enter the statistics mode. Your instrument will
request the number of tests to be considered when computing sta-
tistics. Enter a number from 2 to 30.
3. Press the left ENTER key to display the average of the selected
number of last results.
4. Press the left < key to display the standard deviation of the select-
ed number of last results.
5. Press the left < key a second time to display the coefficient of
variance of the selected number of last results.
6. To return to the diagnostic menu, press the STOP switchpad.
7. To return to “ Cryoscope Ready ”, again press the STOP keypad.
NOTE The instrument will output all three values to the printer
and serial port at step 3. For example:
49
Troubleshooting & Service
0. Select Test Item
1. Statistics
2. Recall Results
3. A/D Tests
4. Stir/Freeze Test
5. Probe Bin Test
6. Barcode Test
7. Display/Print Test
8. Beeper Test
9. Keypad Test
10. Head Up/Down Test
11. Event Record
Table 4: Test Menu Items
Test Menu Items