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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 range.
In manual range mode, select the next higher range mode if 9.99 or 99.9
flashes. See Section 3.2.5 on page 46 for measuring overrange samples.
The display will stop flashing if a sample within range is inserted and
read.
5.4.2 Error 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 E4 error is cleared by pressing
DIAG.
Recalibrate as soon as possible when CAL? appears. CAL? (not
flashing) appears when a calibration has questionable validity.
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