Fluke 5502A, Руководство оператора

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5502A
Operators Manual
4-10
•
Properly terminate the sense leads to prevent exposure to
hazardous voltages on the sense terminals. The voltage
sense terminals are at output voltage when the two-wire
function is set.
•
Do not touch exposed metal on banana plugs, they can have
voltages that could cause death.
•
Do not use a two-conductor mains power cord unless you
install a protective ground wire to the Product ground
terminal before you operate the Product.
•
Make sure that the Product is grounded before use.
Cables to the Calibrator are connected to the NORMAL and AUX terminals. To prevent
errors caused by thermal voltages (thermal emfs), use connectors and conductors made of
copper or materials that supply small thermal emfs when connected to copper. Do not use
nickel-plated connectors. For best results use the Fluke Model 5440A-7002 Low Thermal
EMF Test Leads, which are made of well-insulated copper wire and tellurium copper
connectors. See Chapter 8, “Accessories.”
When to Use EARTH
Figure 4-1 shows the internal connections made by

.
Chassis gro u nd
Internal g u ard shield
N ORMAL LO
signal gro u nd
N ORMAL LO
b inding
post
Safety gro u nd
thro u gh
ac line cord
N ot lit = open
EARTH
gvx003f.eps
Figure 4-1. EARTH Internal Connections