User`s manual

Agilent E8462A Relay Multiplexer Command Reference 89
• Closure order for multiple channels with a single command is not guaranteed.
Note Channel numbers can be in the channel_list in any random order but when the
sequential channel list is used (ccbnnn:ccbnnn), the second channel identifier must
be greater than the first.
Closing the Control Relays: The control relays (9000 to 9021, 9100 to 9108) can
be closed to perform special functions (for example, connecting channels to the
analog bus). However, if the multiplexer has not been configured to the NONE
mode with
[ROUTe:]FUNCtion command, then doing a CLOSe or SCAN of any
bank switch channel will automatically close the associated control relays. Closing
other control relays may cause undesired results. Close:
9000 to 9021 to connect the associated bank of relays to the common terminals (Ter0
- Ter15). These are the T0 to T21 switches of Figure 1-1.
9100 to 9107 to connect the low side of the banks to the high terminal. These are the
C100 to C107 form-C switches of Figure 1-1. These switches are used for making
one-wire connections.
9108 to connect the low side of the banks to the high terminal when making one-wire
measurements and the scan port is set to the analog bus. This switch is switch C108
in Figure 1-1.
9200 to 9204 to connect the banks to the analog bus. These switches are labeled
AB200 - AB204 in Figure 1-1.
- 9200 connects analog H1 to switch C108 (9108).
- 9201 connects analog L1 to the low side of the channel connection.
- 9202 connects analog G to analog L1. This is needed to connect the Guard of
an Agilent E1411B to the Low connection.
- 9203 connects analog H2 to the high side of the second pair of a four-wire
connection or connects H2 to the high side of a two-wire conection through
9109 and 9102 for resistance measurements with meters that have a separate
current source such as the Agilent E1411B.
- 9204 connects analog L1 to the low side of the second pair of a four-wire
connection or connects L2 to the low side of a two-wire conection through
9109 and 9102 for resistance measurements with meters that have a separate
current source such as the Agilent E1411B.
*OPC? Command: Using the *OPC? command after the CLOSe command in your
programs will ensure that the channel
CLOSe command has executed prior to
performing the next function (measure, read, and so on). This programming practice
is highly recommended.
Related Commands:
[ROUTe:]OPEN, CLOSe?, SCAN
*RST Condition: All multiplexer channels are open.
Example Closing Multiplexer Channels
This example closes channel 0 in card 01, and channel 67 in card 02 of a two-module
switchbox. Both modules are in two-wire mode.
CLOS (@1000,20067)
10000 closes channel 0 of card #1, and