Keithley 2750, User Manual

Page: 132 / 452

Model 2750 Multimeter/Switch System User’s Manual Basic DMM Operation 3-41
Figure 3-13
Continuity connections
Continuity testing procedure
NOTE Make sure the INPUTS switch is in the correct position. To use front panel
inputs, it must be in the “F” (out) position. For switching modules, it must be in
the “R” (in) position.
1. Apply the resistance to be tested, and, if using a switching module, close the appro-
priate channel.
2. Press SHIFT and then CONT to display the present threshold LEVEL.
3. Use , ,
Δ
, and
∇
to key in the desired level (1 to 1000
Ω
), and press ENTER.
4. If the measurement is below the threshold level, the beeper will sound and the
ohms reading will be displayed. If the measurement is above the threshold level,
the message “OPEN” will be displayed.
5. To disable continuity testing, select a different function (i.e., press DCV).
NOTE The beeper can be disabled using the SYSTem:BEEPer:STATe OFF command.
However, the beeper will automatically enable the next time the continuity test-
ing function is selected.
Limits and digital outputs cannot be used when testing continuity with the conti-
nuity (CONT) function. If you need to use these operations, use the
Ω
2 function
to test continuity.
H
L
CH 1-20
Model 7700
Switching Module
Resistance
Under Test
Note: Source current flows from input high to input low.
Input HI
Input LO
Resistance
Under Test
A. Front Panel Connections
B. Model 7700 Connections
Model 2750
2750-900-01.book Page 41 Wednesday, August 3, 2011 7:56 AM