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Calibration Procedure
Figure 11-7: Setup for Alloy Test at Thermocouple Connector
9.
Connect the Type E thermocouple to the Model 1140A thermocouple connector,
inserting the bare wire ends all the way into the holes. Optionally, cover the terminals
to shield them from air flow.
10.
After at least one minute (to allow any thermal emf's created when connecting the
equipment to subside) note and record the reading on the DMM. It should be the
known error of the thermocouple at 26°C in microvolts to within the tolerance shown
on the test report.
Output-current Test
1.
Connect the DMM to the binding posts using copper leads as is shown in Figure 11-8.
2.
Press the DCI key to set the DMM to measure milliamperes.
3.
Restore the Model 1140A to its default settings.
Press MENU to go the MAIN MENU (the cursor must be absent).
a.
Scroll to MAINTENANCE and press ENTER to go to the MAINTENANCE MENU.
b.
Scroll to RESET INSTRUMENT TO DEFAULT VALUES and press ENTER.
c.
Scroll to YES and press ENTER.
d.
Press ESC to return to the MAIN MENU.
e.
Figure 11-8: Setup for Output-current Test
11-8
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