Example: Making
2-Wire Ohms
Measurements by
Scanning
Use the same setup shown in the first program example in this section,
except change the command in line 10 and add the following command
before the SCAN <channel_list> command in line 40, as follows:
10 OUTPUT 722;"TRIG EXT;OHMF"
Changes multimeter to 4-wire ohms
OUTPUT 70914;"SCAN:MODE RES"
Closes the appropriate channel
switches and DT Tree Switch
This command automatically closes the channels defined in the channel list
and the DT Tree Switch during scanning.
Note
The Analog Bus cable automatically connects the I-, IG, and G terminals to
the HP E1326/E1411 multimeters. These connections are not necessary
with an external multimeter such as the HP 3457A.
Example: Making
Multiple Scans
The ARM:COUN <number> command selects multiple scanning cycles.
Add the command to the first program example in this section, as follows:
OUTPUT 70914;"ARM:COUN 10"
Enables 10 scanning cycles
OUTPUT 70914;"SCAN (@100:247)"
Sets scan list
Example: Making
Continuous Scans
The INIT:CONT ON command selects continuous scanning cycles
(INIT:CONT OFF disables continuous scanning cycles). Add the command
to the first program example in this section, as follows:
OUTPUT 70914;"INIT:CONT ON"
Enables continuous scanning cycles
OUTPUT 70914;"SCAN (@100:247)"
Sets scan list
Comments
See Chapter 4 for more information on scanning.
Scanning Requirements of a Switchbox (in an HP Mainframe with an HP
Command Module). To scan modules in a switchbox, you must:
•
know the card numbers (see Chapter 1) of all the modules to be
scanned
•
sequentially address the modules (e.g., Logical Address 112, 113,
114, etc.)
•
set lowest addressed module to a logical address that is a multiple of
8 (see the HP 75000 Series B Installation and Getting Started Guide,
or other appropriate manual, for more information).
Chapter 3
Using the HP E1346A Multiplexer Module 31
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