Local And Remote Operation; Computer Interfaces - Fluke 8845A Manual

8845A/8846A
Programmers Manual
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Local and Remote Operation

When the Meter is operated from a host, it is said to be operated remotely. When operated
from the front panel, it is said to be operated locally.
Most operations that can be performed locally can also be performed remotely over the
remote interface. Some operations, like setting communications parameters for the
RS-232 interface, and addressing the Meter for IEEE-488 operations can only be set
through the front panel.
To avoid electric shock, turn off the signal source to the Meter
before touching the test leads. The front panel display may not
indicate the true input voltage while in remote mode. Always
assume lethal voltages exist on the front-panel inputs.

Computer Interfaces

Both the 8845A and 8846A Multimeters come equipped with an RS-232, Ethernet, and
IEEE-488 interface. Only one remote interface can be enabled at a time. Using any of the
interfaces turns the Meter into a fully programmable instrument that can be integrated
into an automated instrumentation system. For a PC with only USB ports, Fluke makes a
cable (Fluke PN 2675479) that converts between USB and RS-232 ports.
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Table 1. Safety and Electrical Symbols
Description
Risk of danger. Important
information. See manual
Hazardous voltage. Voltage > 30 V
dc or ac peak might be present
AC (Alternating Current)
DC (Direct Current)
AC or DC (Alternating or Direct
Current)
Continuity test or continuity beeper
tone
Potentially hazardous voltage
Double insulated
Static awareness. Static discharge
can damage part(s)
Symbol
Display ON / OFF
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Earth ground
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Capacitance
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Diode
 Fuse
Digital signal
Y
Maintenance or Service
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IEC 61010 Overvoltage (installation or
CAT II
measurement) Category 2.
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Recycle
Do not dispose of this product as unsorted
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municipal waste. Go to Fluke's website for
recycle information.
 Warning
Description