Specifications

• Closing Channels - FET multiplexers: To close:
– a single channel, use CLOSe (@ccnn);
– single channels on different cards, use CLOSe (@ccnn,ccnn).
Closure order for multiple channels with a single command is not
guaranteed.
• Related Commands: [ROUTe:]OPEN, [ROUTe:]CLOSe?,
[ROUTe:]SCAN:MODE, [ROUTe:]SCAN:PORT
• *RST Condition: All multiplexer channels are open.
Example Closing Multiplexer Channels
These examples close channel 00 of switchbox multiplexer card number 1.
Relay Multiplexer Switchbox:
CLOS (@100) Closes channel 0 of multiplexer #1.
FET Multiplexer Switchbox:
SCAN:MODE VOLT Selects the voltage scanning mode.
SCAN:PORT ABUS Selects the analog bus port.
CLOS (@100) Closes channel 0 of multiplexer #1.
CLOSe? [ROUTe:]CLOSe? <channel_list> returns the current state of the channel
queried. The channel_list is in the form (
@ccnn). The command returns 1
if the channel is closed or returns 0 if the channel is open.
Comments • Query is Software Readback: The [ROUTe:]CLOSe? command
returns the current software state of the channel specified. It does
not account for relay hardware failures.
Example Query Multiplexer Channel Closure
CLOS (@100) 100 closes channel 0 of multiplexer
#1.
CLOS? (@100) Query channel 0.
Chapter 5 Strain Gage Multiplexer Command Reference 81
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