Hach-Lange 2100P iso - Portable Turbidimeter Instrument - Manual (Page 30)

Page 30
TROUBLE SHOOTING
4650098 diagnostics.fm
Section 5 TROUBLE SHOOTING
5.1 Instrument Diagnostics
5.1.1 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.
5.2 Error Messages
Error messages indicate sample interferences and/or instrument malfunction.
5.2.1 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. The display will stop flashing if a
sample within range is inserted and read.
5.2.2 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.
5.2.3 CAL?
A flashing CAL? appears when the instrument is using the default calibration
programmed at the factory. CAL? (not flashing) appears when a calibration has
questionable validity.