A copy of the calibration file resides on an EEProm on the DMM and is copied to your computer the first
time you use the instrument. A backup copy of the calibration file is included on a diskette that comes
with the DMM.
The default location of the Calibration File is “C:\SM60CAL.DAT”. If your system uses multiple
DMMs, the software will append the Calibration Records of each DMM into a single SM60CAL.DAT
file. The SM60CAL.DAT file is a text file, and can be opened using a text editor such as Notepad, should
it be necessary.
3.5 DMM Terminals
Before using the DMM, please take a few moments and review this section to understand where the
voltage, current, or resistance and other inputs and outputs should be applied.
This section contains
important information concerning voltage and current limits. Do not exceed these limits, as
personal injury or damage to the instrument, your computer or application may result.
Figure 3-1. The DMM input terminals include both, four Banana and a DIN-7 connector.
V, 2
+ This
is the positive terminal for all Volts, 2-Wire Resistance and diode test. When in 4-Wire
resistance measurement mode, it serves as the positive terminal of the current source. The maximum
input across
V, 2
+
and
V, 2
-
is 240 VDC or 240 VAC
.
V, 2
-
This is the negative terminal for all Volts, 2-Wire Resistance and diode test. When in 4-Wire
resistance measurement mode, it serves as the negative terminal of the current source.
Do not float this
terminal or any other DMM terminal more than 240 VDC or 240 VAC above Earth Ground.
I , 4
+
This is the positive terminal for all Current measurements. While in 4-Wire resistance
measurement mode it is the high sense as well as the SMU2064 6W
guarded sense.
The maximum
input across
I, 4
+
and
I, 4
-
is
2.5 A
. Do not apply more than 5 V peak across the I,4
+ and I,4
-
terminals. While the SMU2064 is in DCV or DCI source mode this terminal may be used as an additional
voltage measurement input which is limited to of
2.4V range.
I,4
-
This is the negative terminal for Current measurements. While in 4-Wire resistance measurement
mode it serves as the low sense.
The maximum input across
I, 4W
+
and
I, 4W
-
is
2.5 A
. Do not
apply more than 5 V peak across these two terminals!. While the SMU2064 is in DCV or DCI source
mode this terminal may be used as an additional voltage measurement input which is limited to
2.4V
range.
The I,4
-
Current function is protected by a 2.5 A, 250 V Fast Blow fuse (PCT type).
TRIG / SYNC / GUARD
The Trigger input, Sync output and the two Guard signals are available at the
DIN-7 connector located to the right of the
I , 4
+ terminal
. This group of pins includes the trigger
input (7) line, the Sync output line (2), the Trigger and Sync lines commong (4), and in the case of the
SMU2064, the Guarded Source (1) and Sense (6) signals. The Trigger can be setup to trigger reading(s)
Signametrics
28
