Section 3: Using a remote interface
DMM6500 6½ Digit Multimeter User's Manual
3-10
DMM6500-900-01Rev. A / April 2018
To install the communications card:
1. Turn the instrument off and disconnect the power line cord and any other cables connected to the
rear panel.
2. Position the instrument so that you are facing the rear panel.
3. Remove the slot cover plate from the slot on the back of the instrument. Retain the plate and
screws for future use.
4. Align the card with the connector toward the inside edge of the slot and slide the card into the
chassis. For the last ¼ inch, press in firmly to mate the card to the connector.
5. On each side of the card, there is a spring-loaded mounting screw. Tighten these two screws,
either by hand or with a Phillips-head screwdriver, to secure the card in the case. Do not
overtighten.
6. Reconnect the power line cable and any other cables to the rear panel.
7. Turn on the instrument.
Connect GPIB cables to your instrument
To connect a DMM6500 to the GPIB interface, use a cable equipped with standard GPIB connectors,
as shown below.
Figure 22: GPIB connector
To allow many parallel connections to one instrument, stack the connectors. Each connector has two
screws on it to ensure that connections remain secure. The figure below shows a typical connection
diagram for a test system with multiple instruments.
To avoid possible mechanical damage, stack no more than three connectors on any one
instrument. To minimize interference caused by electromagnetic radiation, use only shielded
GPIB cables. Contact Keithley Instruments for shielded cables.
