Electrical Safety; Ground Continuity; Circuit Isolation - Dräger Narkomed 2B Service Manual

PMC PROCEDURE (continued)

6.1 ELECTRICAL SAFETY

( ) 6.1.1

Ground Continuity

6.1.1.1
NOTE:
NOTE:
6.1.1.2
6.1.1.3
6.1.1.4
( ) 6.1.2

Circuit Isolation

6.1.2.1
6.1.2.2
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Turn the System Power switch to STANDBY.
Do not plug the safety analyzer power cord into a line isolation
monitor, as inaccurate readings may occur.
Plug the unit into the safety analyzer, and plug the power cord of
the safety analyzer into an AC receptacle.
The BIOTECH 501 PRO will automatically test the source outlet
for open ground ( or ground resistance of 31 Ω or higher), reverse
polarity, open neutral and open line. (The latter two conditions
will prevent the analyzer from powering up.)
Set the safety analyzer function switch to the GROUND WIRE
RESISTANCE position. Attach the test lead to the SINGLE LEAD
connector of the analyzer. Connect the other end of the red test
lead to the ground socket of the front panel outlet on the safety
analyzer. Verify a displayed resistance of 0.000 Ω or, if necessary,
press the CALIBRATE key on the front panel of the analyzer to
zero the device.
Set the safety analyzer GROUND switch to NORMAL. Set the
POLARITY switch to OFF.
The safety analyzer shall indicate 0.1 Ω or less with its test lead
applied to the following points:
--Cylinder yoke
--Power supply assembly chassis
--Each convenience outlet ground socket
--Each Auxiliary Outlet Strip ground socket
Disconnect the Spiromed sensor cord from the interface panel.
With a multimeter set to its highest resistance range, check for
continuity between the power supply chassis and the circuit
common at the Spiromed sensor interface connector keyway pin (at
the 12 o'clock position). There shall be no continuity between these
points.
6-2
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NM2B
Rev. Y