Chapter 7
Diagnostics
51
Osmo1
®
Single-Sample Micro-Osmometer User Guide
2.
Select a set point temperature from the drop-down
menu at the top of the screen.
Testing begins.
3.
After five minutes, the block temperature should
roughly equal the set point temperature.
NOTE:
Power level is expressed as a percentage,
indicating how much power the thermoelectric
cooler uses to reach a temperature set point
sensed by the block probe. An increasing
power level requirement indicates
deteriorating performance of the cooling
assembly.
4.
If you select Fixed Resistance, the test runs with
known resistor values, (bypassing the cooling
circuitry) to verify that the A/D is operating
correctly.
NOTE:
When testing in this mode, appropriate
readings are 6200 ohms ±50 ohms. Readings
outside this range might point to issues with
the A/D. Contact Advanced Instruments
Hot-Line Technical Service.
5.
When you are finished working on this screen, tap
Exit
to return to the Diagnostics menu.
7.3 Consumables
The Consumables function allows you to check the
status of the instrument’s consumables (Micro-Sample
Test Kit).
NOTE:
The Micro-Sample Test Kit must be positioned
correctly on the Osmo1 for this diagnostic to
function properly. (See “Placing the Micro-Sample
Test Kit on the instrument” on page 18.)
From the Diagnostics menu, select
Consumables
to open
the Consumables status screen (Figure 75).
•
When the sampler tip count is between 500 (new box)
and 50, the Consumables screen shows the current
count of consumables and the Status field is empty.
•
When the count is below 50, the Consumables screen
shows the current count of consumables in yellow as a
warning that the sampler tips are low. The Status field
displays the message, “Replace AI Consumable Box.”
•
When the system does not detect a Micro-Sample Test
Kit
, the current count of consumables is empty and the
Status field displays the message, “AI consumable box
not detected.”
Tap
Exit
to return to the Diagnostics menu.
Figure 75: Consumables screen