GE Voluson 730, Руководство по обслуживанию

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GE M
EDICAL
S
YSTEMS
- K
RETZTECHNIK
U
LTRASOUND
D
IRECTION
105844, R
EVISION
1 V
OLUSON
® 730 S
ERVICE
M
ANUAL
Chapter 10 Periodic Maintenance 10-17
10-7-5-3 Data Sheet for Chassis Source Leakage Current
The test passes when all readings measure less than the value shown in Table 10-11 . Record all data
on the PM Inspection Certificate.
10-7-6
Isolated Patient Lead (Source) Leakage–Lead to Ground
10-7-6-1 Definition
This test measures the current which would flow to ground from any of the isolated ECG leads. The
meter simulates a patient who is connected to the monitoring equipment and is grounded by touching
some other grounded surface. Measurements should be made with the ground open and closed, with
power line polarity normal and reversed, and with the ultrasound console Off and On. For each
combination the operating controls, such as the lead switch, should be operated to find the worst case
condition.
Table 10-14 Typical Data Sheet for Chassis Source Leakage Current
Unit Power
Tester Polarity
Switch
Tester Neutral
or Ground
Switch
Test 1
Probe
Connector
Test 2
Wheel Test 3
CRT
Optional
Test 4
Optional
Test 5
Enter Name of tested peripheral here:
ON NORM OPEN
ON NORM CLOSED
ON REV OPEN
ON REV CLOSED
OFF NORM OPEN
OFF NORM CLOSED
OFF REV OPEN
OFF REV CLOSED
CAUTION
Equipment damage possibility. Never switch the Polarity when the unit is powered ON. Be sure
to turn the unit power OFF before switching the polarity using the POLARITY switch. Otherwise,
the unit may be damaged.