Metrohm 827 pH lab - Manual (Page 54)

8.2 Messages
46
826/827 pH meter, Instructions for Use
Message Situation Cause Remedy
battery low Mode pH/U/T The batteries are almost
empty Change batteries (see Sec-
tion 8.4.1)
buffer error calibration Buffer not recognized 1. Replace buffer
2. Press
<OK>
buffer not de-
fined calibration pH value of a buffer has
not been defined for the
given temperature pH values are only defined
in the range of 0 ... 95 °C
calibration OK calibration Calibration has been con-
cluded successfully Exit display with <OK> or
<QUIT>; this happens au-
tomatically after 30 s; cali-
bration data will be ac-
cepted in either case
cal. interval
exp. mode pH Set calibration interval has
expired Recalibrate electrode (see
Section 6.1.2
cal. out of
limits calibration Determined calibration
data are outside limits de-
fined as calibration para-
meters Accept calibration data with
<OK> or reject them with
<QUIT>; check electrode,
buffer or limits under 6.1.2 /
6.1.3
change buffer
<OK> calibration Instrument is waiting for
new buffer 1. Change buffer
2. Press
<OK>
check T sensor Mode T Temperature sensor is faul-
ty or not connected Connect a properly function-
ing temperature sensor
delta T >2 °C calibration Temperature difference
between two buffers is too
large 1. Match temperatures
2. Continue with <OK> or
cancel with < QUIT> and
restart
Err #X System test after
switch on pH meter fault 1. Note error number
2. Contact Metrohm Service
IR off Print report /
measured value The IR interface is not acti-
vated Activate the IR interface (see
Section 5.4
manual stop calibration The calibration has been
stopped manually
mv memory
overflow Saving measured
values Attempt made to store a
further measured value
when 200 have already
been stored Delete measured values
(see
Section 7.2 )
no IR connec-
tion No connection with printer 1. Press <QUIT>
2. Switch on printer
3. Switch pH meter off and
on again