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Block Bin Setting Troubleshooting
10. If the current sample bin number is not the same as the one recorded in step 5, enter the
correct number, press ENTER twice, and then press STOP twice to exit the menu.
Recalibration will be required.
Block Bin Setting
1. Turn off the power and unplug the instrument.
2. Remove the cover and record the block probe bin number located on the block probe
wire.
3. Replace the cover.
4. Plug in the instrument and turn it on. If there is a Supervisor/ Operator keyswitch, turn it
to the Supervisor position (if required).
5. At Press START to Continue”, press SETUP.
6. At Select Setup Item, press < or > to select Select Block Bin #, and then press START
7. Enter the correct number and then press ENTER twice.
8. Press STOP to exit the menu. Recalibration will be required.
Stir Amplitude
1. Turn on the instrument. If there is a Supervisor/Operator keyswitch, turn it to the
Supervisor position (if required).
2. Press SETUP.
3. Press < or > to select Set Stir Amplitude, and then press START.
4. Watch the vibration blur at the tip of the stir/freeze wire. If the amplitude is not within
the range specified below, press > to increase the amplitude, or press < to decrease the
amplitude. (The default is 100, but your value may differ.)
– 3250: The stir wire movement should be no wider than the width of the sample probe.
– 4250: The stir wire movement should be twice the width of the sample probe.
5. If using a glass sample tube, check the setting by placing a sample (water or standard
solution) in position on the probe. If bubbles form in the sample, or if the stir wire hits the
tube, the current setting is too high and must be adjusted downward.
6. When the setting is correct, record the new stir amplitude number for your records, and
press ENTER.
7. At Set Stir Amplitude, press STOP to return to Osmometer Ready or Cryoscope Ready .
Note Stir wire movement should be stable. If movement has erratic amplitude, driver
transistor PCB520 may need replacement. Use an oscilloscope at J9-1 to verify the
presence of a clean, square wave (see Stir Driver Noise procedure).
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