X-Rite 891, Operation Manual

Page: 69 / 80

B-1
A P P E N D I X B
Error Messages
Below is a list of typical error messages that can appear on your instrument’s
display screen. If any error messages listed, or not listed should appear, make
a note of it and take the appropriate steps to try to correct it. If an error
message is consistently displayed, contact X-Rite or an authorized service
center.
Message Reason Possible Cause Solution
INVALID READING -
PLEASE RE-READ! Unit did not
recognize strip. Wrong strip selection. Select correct format.
or
UNRECOGNIZABLE
STRIP
or
Strip did not have a
30.5mm (1.2”) leader
before first target. Use strip with leader or refer
to the Control Strip & Balance
Print Format Guide for
leaderless strip insertion.
BUFFER OVERFLOW
(during measurement)
Strip not inserted in the
correct direction. Refer to your Control Strip
and Balance Print Format
Guide for insertion direction.
Unit needs calibration Calibrate instrument, Sec. 2.
Measurement region
not aligned with center
diamond, or strip not
tracking properly.
Make sure measurement
patches are centered with
diamond and center line.
Usually setting the paper guides
to the numbers indicated on the
display takes care of the
problem. Make sure strip feed
straight through unit and does
not curve toward one side.
One or more
measurement patches
are cloudy, have
excessive gradients, or
have flecks. Process and then measure a
new strip.
NOTE: If first read causes invalid error message, try
re-reading strip again. Measurement tolerances across the
patch are opened slightly on second read.
Motor drive roller
slippage due to restraint
or obstruction, or
contamination of rollers
from reading wet strips. Remove restraint/obstruction
or dry drive rollers with air.
Lamp failure (weak or
bad). Perform transmission
calibration to test lamp, Sec. 2.
A-LIMIT EXCEEDED Strip measured
exceeds Action
Limit Computed values minus
aims, are greater than
the calculated Action
limit. Consult the manufacturer’s
process manual.