Economical,
Portable 4 Wire Measurement
The 4021 is
Valhalla's most economical ohmmeter. Although the 4021 is
available at a surprisingly low cost, this unit is packed
with features you would expect to find only on
instruments priced two to three times higher. To start
with the 4021 is built around a low noise, high
resolution analog to digital converter. The measurement
is then displayed from 1mohm resolution to 2Mohms
full scale on a high intensity, 4.5 digit, L.E.D.
readout. As with all Valhalla ohmmeters, the 4021 uses a
four-terminal output configuration to eliminate lead wire
length and lead contact resistance errors. This means no
more pot twiddling to compensate for lead resistance. The
4021's four-terminal measurement technique provides for
stable and repeatable low resistance readings. This kind
of measurement performance cannot be obtained with a
typical two-wire digital multimeter.
This tough
benchtop instrument features a high impact injection
molded case with handy tilt bail/handle that is easily
adjusted to perfect viewing angle. The 4021 comes
standard with "no hassle" AC power capability and a
detachable line cord. As an added convenience in portable
applications, the 4021 is available with an optional
heavy duty rechargeable (option HDB) battery pack. A 6
VDC battery charger/eliminator is included with the
battery pack option and is designated as Option
"A".
For
applications requiring data output the 4021 is available
with "BCD". Click here for Data Sheet.
The "BCD" talk only interface is fully
compatible with our 1248 Dual Limit Comparator and is
mutually exclusive with the battery pack option. As with
all Valhalla digital ohmmeters, the 4021 is available
with a host of 4-wire probes and cable sets. Consult the
end of this section for complete information on digital
ohmmeter accessories.
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