Fluke 45 IEEE-488Operating Limitations, Installing the IEEE-488Interface, Addressing the Meter

Operating the Meter Using the Computer Interface	5
Preparing the Meter to be Operated via IEEE-488 Interface

Preparing the Meter to be Operated via IEEE-488 Interface

To turn the meter into a fully programmable element of an automated testing system, use the IEEE-488 Interface option, as described below.

IEEE-488 Operating Limitations

The following limitations govern the IEEE-488 interface:

•A maximum of 15 devices can be connected in a single IEEE-488 bus system.

•The maximum length of IEEE-488 cable used in one IEEE-488 system must be the lesser of 20 meters or 2 meters times the number of devices in the system.

Installing the IEEE-488 Interface

If the meter was not shipped with the IEEE-488 option installed, install the IEEE-488 interface according to the instructions provided with it.

To determine if the IEEE-488 interface is installed, perform the procedure under "Enabling the IEEE-488 Interface" (below). "IEEE" is displayed only if the IEEE-488 interface is installed in the meter.

Enabling the IEEE-488 Interface

The IEEE-488 interface can only be enabled from the front panel. Perform the following procedure to enable the IEEE-488 interface:

1.Press in the POWER button on the front panel to turn the meter on.

2.Press S, then press R.

The baud rate currently selected is shown in the primary display and "baud" in the secondary display.

3.Press the Tto scroll to "IEEE"; then press Eto enable the IEEE-488 interface. RS- 232 capability is now disabled.

Note

"IEEE" can only be selected if the IEEE-488 interface board has been installed and the meter is connected to line power. If the meter is under bat- tery power and you attempt to select "IEEE" the N flashes and "IEEE" cannot be selected until the meter is connected to line power.

Addressing the Meter

After the IEEE-488 interface board has been installed and enabled, the meter must be assigned an address between "0" and "30".

Perform the following procedure to assign the meter a valid address:

1.Press in POWER to turn the meter on.

2.Press S, then press J(ADDR).

3.Press Uor Tto scroll to the desired address. Then press Eto select that address. The address will remain selected until it is changed.

4.To exit and return the meter to normal operation without changing the address, press any button but E, U, or T.

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