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Model 3465B
Section III
3-21. CURRENT MEASUREMENTS.
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A
f CAUTIONS
Do not exceed a maximum input voltage of
250 V dc + peak ac or a maximum dc or ac
rms input current of 2 A or the amps fuse,
located directly behind the "A" terminal, will
open. See the following paragraph for replace
ment instructions.
3-22. The Multimeter is protected from the application of
excessive current by a 2 A fuse located directly behind the
front panel "A" terminal. If it is necessary to replace this
fuse, use the side slots on the "A" terminal to rotate the
terminal. The terminal and fuse will protrude from the
front panel. Remove the terminal and fuse, replace fuse
with a 2 A rated fuse as listed in Table 6-3 Miscellaneous
Parts General, and designated Fl.
3-23. AC Current Ranges.
3-24. AC current measurements are specified over a fre
quency range of 40 Hz to 20 kHz. There are five current
ranges from 200 ph to 2000 mA. See current measure
ments Caution in Paragraph 3-21.
3-25. DC Current Ranges.
3-26. DC Current measurements can be made on five cur
rent ranges from 200 pA to 2000 mA. See current measure
ments caution in Paragraph 3-21.
3-27. OHMS MEASUREMENTS.
A
Do not apply voltage greater than ± 250 V dc -r
Peak AC between the ohms and common input
terminals in the ohms function or damage to
the instrument will occur.
3-28. Ohmmeter Ranges.
3-29. Resistance measurements can be made on six ranges
from 200 ohms to 20 megohms. Both input terminals (f2
and COM) are floating with respect to circuit ground.
3-30. Ohmmeter Reference Current.
3-31. The ohmmeter reference current through the un
known resistance for each range is shown in Table 3-1.
Table 3-1. Ohmmeter Current Through Unknown.
Current
Range
Through Unknown
200 a
1 mA
2 ka
1 mA
20 ka
10 mA
200 kn
10 mA
2000 kn
1 mA
20 Mn
0.1 mA
Maximum open-circuit voltage at the ohms input terminals
is less than 5 V.
3-3/3-4
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