Taylor K-8000, User Manual, Page: 43 / 100

3-17 TTi
®
Colorimeter User’s Manual
Part 3 Colorimeter Operation
TEST ALERTS
Test alerts are noncritical messages displayed during normal operation when certain test mode parameters are
not met. If a test alert is triggered, refer to the table below to determine the cause and appropriate response.
Display Message Cause User Response
↑
RANGE and result
alternately flash
Sample concentration exceeds upper range of
the test. An approximate result is calculated and
displayed. Dilute the sample. Retest; then multiply result by
the dilution factor (see Part 2, Diluting Samples for
Test Procedures).
↑
RANGE Sample concentration greatly exceeds upper
range of the test. An approximate result cannot be
calculated. Dilute the sample. Retest; then multiply result by
the dilution factor (see Part 2, Diluting Samples for
Test Procedures).
↓
RANGE and result
alternately flash
Sample concentration exceeds lower range of
the test. An approximate result is calculated and
displayed. Clean the sample cells and retest to verify. Make
sure the sample cells are capped and correctly
aligned in the sample cell compartment.
↓
RANGE Sample concentration greatly exceeds lower range
of the test. An approximate result cannot be
calculated. Clean the sample cells and retest to verify. Make
sure the sample cells are capped and correctly
aligned in the sample cell compartment.
↑
LIMIT The Adjust Calibration upper limit has been reached. Make sure the concentration of the calibration
standard (prepared standard of known concentra-
tion) is between 70%–80% of the upper test range
provided in the test instruction. (See Part 3, Adjust
Calibration.)
↓
LIMIT The Adjust Calibration lower limit has been reached. Make sure the concentration of the calibration
standard (prepared standard of known concentra-
tion) is between 70%–80% of the upper test range
provided in the test instruction. (See Part 3, Adjust
Calibration.)
ZERO ? A zero was not performed before starting the
timer’s auto-read feature. Retest. Zero before the timer expires when using
the auto-read feature. (See Part 3, Test Timers and
Auto-Read Option.)
↑
LIGHT Too much ambient light. Retest. Make sure the sample cell is capped and
correctly aligned in the sample cell compartment.
TEST TIMERS AND AUTO-READ OPTION
Test timers are included in the test screen footer for all tests. Test timers are either preprogrammed or
nonprogrammed. Preprogrammed timers are used when a test requires timing steps between addition of
reagents or to assure full color development of reagents. Up to four preprogrammed timers may be used in a
test. Preprogrammed timers can be accessed and edited at any time during the test procedure. Test instructions
will inform the user when to use a preprogrammed timer. If a preprogrammed timer is not required in a test, a
nonprogrammed (general use) timer will be available in the footer. When a test timer expires, the device emits
three sets of beeps. Each set consists of one long beep followed by two short beeps. The timer icon remains
solid until a key is pressed.
The timer will count down as long as the user does not exit the test or move to the next test in a series. It will
continue to count down during ZERO and READ operations.
AUTO-Read Option: The final preprogrammed timer in a test will include the AUTO-Read option in the
test screen footer. When this option is selected, the device will automatically READ the sample when the
timer countdown expires. The AUTO-Read option is not available for nonprogrammed timers.