To Replace the Current Input Fuses
The front and rear current input terminals are protected by two series
fuses. The first fuse is a 3 A, 250 Vac, fast-blow fuse and is located on
the rear panel. To replace this fuse, order Agilent part number
2110-0780.
A second fuse is located inside the multimeter to provide an additional
level of current protection. This fuse is a 7 A, 250 Vac, high-interrupt
rated fuse (Agilent part number 2110-0614). To replace this fuse, you
must remove the multimeter’s case by loosening three screws (see the
mechanical disassembly drawing on page 9-3).
To Connect the Pass/Fail Output Signals
The RS-232 connector on the multimeter’s rear panel is a 9-pin connector
(
DB-9, male connector). When the RS-232 interface is not selected
(
IEEE-488 interface is selected), the internal pass and fail TTL output
signals (limit testing) may be connected to the
RS-232 connector.
The pass and fail signals are low true and indicate the Math Pass/Fail
Limit Test result for the next reading to be output to the
GPIB interface.
The signals are active low for approximately 2 ms for each reading taken.
Pin Number
1
2
3
4
5
6
9
Input/Output
Output
Input
Output
Output
–
Input
Output
Description
* Limit Test Pass
Receive Data (RxD
)
Tr
ansmit Data (TxD)
Data Terminal Ready (DTR)
Signal Ground (SG)
Data Set Ready (DSR)
*
Limit Test Fail
* TTL output is available only after installing two jumpers inside the multimeter.
RS-232 Connector
6
Chapter 6 Service
To Replace the Current Input Fuses
115
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