1.0 Introduction
Congratulations! You have purchased a PXI/CompactPCI Plug-in instrument with analog and systems performance
that rivals the best, all-in-one box instruments. The SMX2040 series digital multimeters (DMMs) are easy to setup
and use, have sophisticated analog and digital circuitry to provide very repeatable measurements, and are protected
to handle any unexpected situations your measurement environment may encounter. To get years of reliable service
from these DMMs, please take a few moments and review this manual before installing and using this precision
instrument.
This manual describes the SMX2040 and SMX2044 DMMs. Each DMM delivers unmatched breakthrough
performance in a PXI and CompactPCI plug-in instrument. With a rich repertoire of functions, the SMX2040 series
out performs all other plug-in DMMs, including the trusted Signametrics SM-2020CT, and most brand named
bench top units.
Note: In this manual, all references to the "SMX2040" and “DMM” apply to the SMX2040 and SMX2044.
Features unique to the SMX2044 will be identified as such.
1.1 Safety Considerations
Safety Considerations
The SMX2040 series of DMMs is capable of measuring up to 300 VDC or 250 VAC across the Volt HI
and LO terminals, and can also measure common mode signals that "float" the DMM above EARTH
ground by up to 300 VDC or 250 VAC. When making common mode measurements, the majority of the
circuits inside the DMM are at the common mode voltage.
These voltages can be lethal and can KILL!
During and after installing your DMM, check to see that there are no wires or ribbon cables from
your PXI/CompactPCI chassis trapped inside the DMM.
The DMM comes installed with two shields (bottom and top) that
must not be removed for performance
as well as safety reasons.
Removal of these shields and/or improper assembly of the shields can result in
lethal voltages occurring within your chassis. Also make sure the chassis is 3U in size.
Warning
Check to see that no loose wires or ribbon cables infringe upon any of the internal circuits of the
DMM, as this may apply measurement voltages to your computer, causing electrocution and/or
damage to your PXI/CompactPCI chassis !
To avoid shock hazard, install the DMM only into a 3U PXI and CompactPCI chassis that has its
power connector connected to a power receptacle with an earth safety ground.
When making any measurements above 50 VDC or 40 VAC, only use Safety Test Leads.
Examples of
these are the Signametrics Basic Test Leads and Deluxe Test Leads, offered as an optional accessory with
the Signametrics DMMs.
Do not
use these units in a
6U
chassis as an
electrocution hazard will be
present
.
7
Signametrics
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