Metrohm 781 pH/Ion Meter - Manual (Page 128)

8.2 Messages
118
780/781 pH/Ion Meter, Manual
Message Situation Cause Remedy
buffers
unsuitable Electrode test Electrode test has been
started with a set of buffers
that does not contain all
the necessary buffers • Change buffers
• Check selected buffer
type in the calibration pa-
rameters (see Sec-
tion 8.6.1)
change buffer
<ENTER> pH calibration Instrument is waiting for
new buffer 1. Change buffer
2. Press
<ENTER>
buffer alloc.
impossible? pH calibration • Buffer not recognized or
not defined (buffer type
'special', 'own' or 'mixed')
• Offset potential Uoff is
set too high
1. Replace buffer
2. Press
<ENTER>
or
1. Stop calibration
2. Define buffer
3. Restart calibration
or
Enter Uoff (see
Sec-
tion 6.2.2 ) and restart cali-
bration
report output
... Standard addi-
tion,
sample addition Instrument is busy with the
output of a RS232 report Wait until report output is
finished
RS error 36 RS232 remote
control RS receiver error:
parity unmatched 1. Press <QUIT>
2. Match the parities of both
instruments (see Sec-
tion 5.7 )
RS error 37 RS232 remote
control RS receiver error:
stop bit unmatched 1. Press <QUIT>
2. Match the stop bits of
both instruments (see
Section 5.7 )
RS error 38 RS232 remote
control RS receiver error:
data overflow, at least one
character cannot be read
(incorrect baud rate) 1. Press <QUIT>
2. Match the baud rates of
both instruments (see
Section 5.7 )
RS error 39 RS232 remote
control RS receiver error:
internal receiver buffer
overflow 1. Press <QUIT>
2. Repeat process
RS error 42 Report output RS transmitter error:
handshake not replied to
for at least one second 1. Press <QUIT>
2. Check reception readi-
ness at other end
RS error 43
Report output RS transmitter error:
transmission from the pH
Meter has been interrupted
by XOFF for at least three
seconds
• Press <QUIT>
• Send XON