Fluke Biomedical DALE601 - Manual (Page 30)

DALE601/601E
Operators Manual
2-6
Measuring Line (Mains) Voltage
Line Voltage (V
L
) is the mains power supplied by the electrical distribution
system of the hospital. It is shown as a three-wire system of HOT, NEUTRAL
(L2) and GROUND with NEUTRAL, like GROUND, returned to true earth at
entry into the building.
Measurement is made between the HOT and NEUTRAL wires via transformer
coupling to isolate the measuring circuits from the line.
To measure line voltage:
1. Set the FUNCTION switch to MAINS VOLTAGE ( the recommended
starting position).
MAI N S V OLTAGE
CURRE N T AMPS
EARTH RESISTA N CE
EARTH LEAKAGE
E N CLOSURE LEAKAGE
PATIE N T LEAD LEAKAGE
PATIE N T AUX CURRE N T
M.A.P.
EXTER N AL
fcu03.eps
The Analyzer displays the mains voltage with a resolution of 1 V.
2. Set the OUTLET switch to the NORMAL position and POWER ON the
DUT.
3. The Analyzer displays mains voltage, but under the load of the device
being tested. Depending on the DUT operating current and the electrical
supply wiring, the voltage differential may be significant.
Note
The difference between the line voltages with the DUT powered off
and powered on indicates whether the line is adequate for the device.
A large drop may suggest that a dedicated, higher ampacity line
should be run in for the device.