Operation
Copper Voltage Offset
The offset is used to compensate for any inaccuracies attributable to the instrumentation being
used. For example if a meter being used has a known offset at 0 V, that offset in the opposite
polarity should be entered so that in the source mode, the meter being calibrated will read
correctly, and in the meter mode, the Model 1140A will correctly display the temperature or
voltage of the thermocouple junction being measured.
Copper Offset Units
Select VOLTS, MILLIVOLTS, or SYSTEM UNITS, which are those units set under the INSTRUMENT
MODE MENU.
Copper Voltage Offset
Select any voltage from −11000 mV to +11000 mV.
Autozero Enabled
Autozero is used in the meter mode to allow the user to measure the deviation that an input has
from its nominal value. For example, if a thermocouple at a known temperature is being
measured, enabling autozero will “zero” the reading on the screen so that any subsequent
readings will reflect a deviation, if any, from the initial reading. When using the meter mode,
pressing the 0 key evokes the AUTOZERO screen from which the user can enable autozero.
MEMORY MENU
WORKING FILE: <NO FILE>
SAVE AS
Figure 4-6: Memory Menu with No Saved Files
MEMORY MENU
WORKING FILE: XYZ
OPEN
SAVE
SAVE AS
RENAME
DELETE
Figure 4-7: Memory Menu with Saved Files
Memory Menu
The MEMORY MENU allows the user to program up to 31 files into memory for easy recall. A file
contains all the settings that are shown on the operating screen at the time the file is created.
Figure 4-6 shows the MEMORY MENU when there are no files stored, and Figure 4-7 shows the
menu when there is one file or more stored.
4-12
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