Fluke 225C Programming Reference Manual page 51

'
'****************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'*******
ClearReadings:
WHILE LOC(1) > 0
LINE INPUT #1, dummy$
WEND
RETURN
'******************
Acknowledge subroutine
Clears pending data from the RS232 port *********
End example program
Page 3.37
'Reads acknowledge from ScopeMeter.
******************
******************