12 Chapter 2: TempScan/1100 & MultiScan/1200 TempScan / MultiScan User's Manual
Front Panel Indicators
Ten (10) LED indicators on the front panel of either the TempScan/1100 or MultiScan/1200 display the
status of the temperature-and-voltage measurement system:
• ALARM: ON when an alarm has occurred. The indicator remains ON until the alarm condition
clears. OFF when no alarm condition exists.
• TRIGGER: Flashes when
Armed and waiting for a Trigger; is ON continuously when triggered; is
OFF when data collection is finished. The Trigger is also turned OFF by IEEE
DCL or SDC.
• SCAN: ON when the unit is storing a channel scan in its internal buffer.
• SEND: (For RS-232/RS-422 operation only) ON when transmitting data to the serial interface.
• RECEIVE: (For RS-232/RS-422 operation only) ON when receiving data from the controlling
computer.
• TALK: (For IEEE 488 operation only) ON when the unit is in the Talker state, OFF when the unit
is in the Idle or Listener state.
• LISTEN: (For IEEE 488 operation only) ON when the unit is in the Listener state, OFF when the
unit is in the Idle or Talker state.
• SRQ: (For IEEE 488 operation only) ON when the unit has generated a Service Request (SRQ),
OFF when no SRQ is pending. For more information, see command Set SRQ Mask (
M).
• ERROR: ON when an error has occurred, OFF when no error condition exists. For more
information, see command Query Error Status (
E?).
• POWER: ON when power is applied to the unit and the power switch on the back panel is in the
ON position (depressed). OFF if power is not present.
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