PMS PROCEDURE (continued) NM2C
6.1 ELECTRICAL SAFETY
( ) 6.1.1 Ground Continuity
6.1.1.1 Turn the System Power switch to STANDBY.
NOTE: 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.
NOTE: 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.)
6.1.1.2 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.
6.1.1.3 Set the safety analyzer GROUND switch to NORMAL. Set the
POLARITY switch to OFF.
6.1.1.4 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
( ) 6.1.2 Circuit Isolation
6.1.2.1 Disconnect the respiratory volume sensor cord from the interface
panel.
6.1.2.2 With a multimeter set to its highest resistance
range, check for continuity between the power
supply chassis and the circuit common at the
sensor interface connector keyway pin (use the 12
o’clock position for the Spiromed connector or the
position indicated in the illustration for the
ultrasonic flow sensor connector). There shall be no continuity
between these points.
Rev. P
6-2
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