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n) Low Temperature Backup Thermostat (S1) (cont’d.)
6.
When the contacts of S1 open up, the audible alarm, the
REMOVE FROM USE NOW / MACHINE SHUTDOWN
LED, and the
ALERT
LED will come on. The mercury thermometer should read
between 26.6°F (-3.0°C) and 36.5°F (+2.5°C) at this point.
7.
Turn machine off. Allow it to warm up to reset thermostat.
8.
Drain machine of water and alcohol mixture as in step 1 above.
9.
Refill with distilled water until the green band on the float stem is
fully visible.
o) Grounding Resistance
Use an ohmmeter to measure the resistance between the grounding
pin on the line cord attachment plug and an exposed metal point on
the chassis. The value should be less than 0.5 ohms.
p) Current Leakage, CHASSIS
Measure the maximum current leakage between the chassis and the
ground in all operating configurations (heating, cooling, compressor
ON,
compressor
OFF,
normal and reverse polarity with the machine
grounded and ungrounded). The current leakage should not exceed the
following:
Condition
Current Leakage
Machine grounded
10 microamps
Machine ungrounded
100 microamps
Current Leakage, PATIENT PROBE
It is first necessary to prepare a patient probe by wrapping it tightly
along its entire length with metal foil. Then measure current leakage at
the foil for all combinations: grounded, ungrounded, normal polarity, and
reversed polarity. The current leakage should not exceed 50 microamps.
NOTE: If additional information is required, refer to
AAMI American National
Standard, Safe Current Limits for Electromedical Apparatus
or contact
Gaymar's Technical Service Department.
q) Reset the RFU Code (not applicable to machines
containing Version 1.0 software)
The Medi-Therm II machine will retain the previously stored code.
Before returning a machine to service, reset the RFU code to zero so
that a previous code is not held in memory.
To reset the RFU code to zero:
1.
Place the machine in service mode 1 (see section 8.1, p. 34).
2.
Press the
TEST LIGHTS
button on the control panel.
The RFU code is reset when the number on the blanket display shows “0”.
7.3 FUNCTIONAL CHECK &
SAFETY INSPECTION
(continued)
FUNCTIONAL CHECK &
SAFETY INSPECTION
31
SERVICE MANUAL
Medi-Therm II
