MKS 670B - Page 134

Cha
p
ter Seven: IEEE-488 Communications O
p
tion MKS Device De
p
endent Messa
g
es
119
Channel-Specific Messages
(Continued)
Function Message
Gain Range
Command
Shortcut command
Query
Shortcut query
:sense:scan(@
chan#
):gain
value
:sens:scan(@
chan#
):gain
value
:sense:scan(@
chan#
):gain?
:sens:scan(@
chan#
):gain?
where
chan #
equals:
1 for Channel 1
2 for Channel 2
3 for Channel 3
where
value
equals X1, X0.1, X0.01, or Auto
Table 33: IEEE-488 Channel-Specific Messages
Example 1: How To Change the Pressure Units
To change the pressure units to psi on Channel 1, send the following command:
:sense:scan(@1):puni psi
ENTER
Example 2: How To Set the Display and Remote Reading Resolution
To set the display and remote reading resolution to 4.5 digits on Channel 1, send the
command:
:sense:scan(@1):digit 4.5
ENTER
The 670 instrument will return the same command to indicate that the command was
accepted. The pressure reading, reported by the “:measure:function” command, will be in
4.5 digits.
Example 3: How To Set the Sensor Full Scale Value
Use the following command to set the sensor full scale to 0.1 Torr on Channel 2 (assuming
that you have a 274 multiplexer connected to the 670 instrument):
:sense:scan(@2):range 0.1
ENTER
The pressure reading will now reflect the new sensor full scale range.
Note
The 670 instrument will accept fractional entries with or without the
leading zero. For example, you may enter either “0.1” or “.1” to set the
full scale range.
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