Temperature Control System Test; Alarm Tests - CardioQuip MCH-1000 Operators & Service Manual

Temperature Control System Test

1. From the STANDBY screen, set the temperature at 0°C, touch the
ensure the system enters cooling mode (water flows into the water tank, temperature
control status reads "COOLING"). Note that the output temperature will only decrease to
the nominal water temperature in the tank.
2. Set the temp at 42°C and ensure the system enters heating mode (no water flow in
water tank, temperature control status reads "HEATING").
3. Set the system to various temperatures throughout the scale and allow time for
stabilization. Check each set point temperature, at the water output, with a reliable
temperature standard, to ensure that the temperature displayed is within ± 0.5°C of the
actual output water temperature. Note that sterile or 0.22-micron filtered ice must be
added to the water tank in order to achieve set points below nominal water temperature.
WARNING: Only use sterile or 0.22-micron filtered tap water in the MCH.
Unfiltered tap water cannot be used with the MCH device for any reason.

Alarm Tests

1. From the RUN screen, set the temperature at 42°C. Once the temperature has stabilized
at 42°C, check the actual output water temperature with a reliable temperature
standard, to ensure that the temperature does not exceed 42°C (±0.5°C). Add sterile or
0.22-micron filtered hot water (not more than 60°C) to the water tank. Adjust the temp
setting to 30°C to cause the system to pull from the water tank. Carefully monitor the
system and ensure that the Overtemp Alarm activates at 42.5°C (±0.5°C). The
OVERTEMP screen should appear, an audible alarm should sound, and the pump should
stop.
2. Touch the Silence Alarm
approximately 60 seconds, and the OVERTEMP screen should remain.
3. Touch and hold the Cold Water Control button
to Low pump speed and water should flow into the water tank. Add sterile or 0.22-
micron filtered cold water to the tank, and the alarm should clear. With hot water in the
water tank, the alarm will not clear until the water temp in the tank falls below 42°C.
42 MCH OPERATION | Initial Operation Check
button. The audible alarm should silence for
Run button, and
. The system should change