70
SECTION 5,
continued
5.3 Other Instrument Diagnostics
5.3.1
Display Test
Pressing and holding the
I/O
key turns on all the display icons and
elements so you can determine if all the elements and icons are
functioning. The display test sequence will cycle as long as the key
is held down.
5.4 Error Messages
Error messages indicate sample interferences and/or
instrument malfunction.
5.4.1
Flashing Numeric Display
If the highest value in the range selected is flashing in the display, the
sample is too turbid (or overrange) for the selected range. In automatic
or manual range,
1000
flashes if the sample is over the instrument's
range. In manual range mode, select the next higher range mode if
9.99
or
99.9
flashes. See
Section 2.3.6
on page
31
for measuring overrange
samples. The display will stop flashing if a sample within range is
inserted and read.
5.4.2
E Messages
An error message indicates either an instrument failure or an operation
cannot be performed.
An error message can be cleared by pressing
DIAG
(display will return to previous measurement or calibration value).
The meter continues to operate as best it can. If the message occurs
during a calibration, calibration can continue. If the error message
occurs when a calibration is being calculated, the instrument will
discard the new calibration and retain the old calibration. Error
messages and corrective actions are listed below.
5.4.3
CAL?
A flashing
CAL?
appears when the instrument is using the default
calibration programmed at the factory. It will appear if the analyst has
erased the user-entered calibration using the procedure to restore the
default calibration or after and E 4 error is cleared by pressing
DIAG
.
Recalibrate as soon as possible when
CAL?
appears.
CAL?
(not
flashing) appears when a calibration has questionable validity.
