Fluke 225C Programming Reference Manual page 36

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Purpose:
Queries the contents of the ScopeMeter's status register.
The returned value reflects the present operational status
of the ScopeMeter. This is a 16-bit word, presented as an
integer value, where each bit represents the Boolean value
of a related event.
Command Syntax:
IS<cr>
Response Syntax:
<acknowledge><cr>[<status><cr>]
where,
<status> =
<status>
Bit Value
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0 1
1 2
2 4
3 8
4 16
5 32
6 64
7 128
8 256
9 512
10 1024
11 2048
12 4096
13 8192
14 16384
15 32768
Example:
Page 3.25
INSTRUMENT STATUS
integer value 0 to 65535
Status Description
Maintenance mode
Charging
Recording
AutoRanging
Remote
Battery Connected
Power (Net) Adapter connected
Calibration necessary
Instrument Held (HOLD status)
Pre Calibration busy
Pre Calibration valid
Replay buffer full
Triggered
Instrument On
Instrument Reset occurred
Next <status> value available
IS