64
360093-1/H
Platelet Incubator Operation Manual
►
Water to be used for the low alarm test. The water should be at least 1 °C lower than the low alarm
setpoint, and there should be enough to fill the tube for alarm checks to a depth of at least 2 inches
(5 cm). Avoid using extremely cold water: the temperature reading should change slowly so you can
identify the alarm activation temperature more precisely.
►
Water to be used for the high alarm test. The water should be at least 1 °C higher than the high alarm
setpoint, and there should be enough to fill the tube for alarm checks to a depth of at least 2 inches
(5 cm). Avoid using extremely hot water: the temperature reading should change slowly so you can
identify the alarm activation temperature more precisely.
To test the temperature alarms manually
1
Verify that the temperature controller readout has been calibrated. For calibration instructions, see
Section 7.6, “Calibrating the temperature controller readout.”
2
Verify that the reading for the upper temperature monitoring probe has been calibrated. For calibration
instructions, see Section 7.7, “Calibrating temperature readings on the i.Center.”
3
Identify the current settings for the low alarm setpoint and high alarm setpoint. For instructions, see
Section 4.2, “Viewing current settings.”
4
Test the low temperature alarm.
a
Using the water for the low alarm test, fill the tube for alarm checks to a depth of at least 2 inches
(5 cm). After returning the tube to its holding bracket, slide the tube upward to immerse the tip of
the temperature monitoring probe.
b
Watch the chamber temperature reading on the i.Center display. The temperature should decrease
slowly (at a rate of about 0.5 °C per minute). When the temperature reaches the low alarm
setpoint, an alarm should sound and Low Temp should appear on the i.Center display.
5
Test the high temperature alarm.
a
Using the water for the high alarm test, fill the tube for alarm checks to a depth of at least 2 inches
(5 cm). After returning the tube to its holding bracket, slide the tube upward to immerse the tip of
the temperature monitoring probe.
b
Watch the chamber temperature reading on the i.Center display. The temperature should increase
slowly (at a rate of about 0.5 °C per minute). When the temperature reaches the high alarm
setpoint, an alarm should sound and High Temp should appear on the i.Center display.
6
Dispose of the water and return the tube to the bracket. Slide the tube so that it is below the probe.
!
CAUTION:
Leaving the probe covered during normal operation prevents the probe from
accurately reading the chamber temperature.
7.8.2.2
Testing temperature alarms manually on i.Series models other than PC100i
You must have the following to complete this procedure:
►
A container for holding the water to be used during the tests. The container should be deep enough
to keep the tip of the probe immersed in water. The volume of the container should be large enough
to accommodate additional water that is used to raise or lower the temperature. The opening in the
container should be at least 3.25 inches (8 cm) wide to accommodate the probe bracket (for more
information, see steps 6-7 in the procedure that follows).
►
Room-temperature water. The water should be at least 1 °C higher than the low alarm setpoint, and
at least 1 °C lower than the high alarm setpoint. There should be enough to fill the test container to a
depth of about 1 inch (2 cm).
