Trouble-Shooting - MERCK RQflex plus 10 Mode D'emploi

7 Trouble-shooting

The following table shows explanations of the error messages and tips on how to
avoid incorrect measurements.
The most commonly encountered problems are caused by:
• The test strips or cells not being inserted correctly.
• Cells being dirty or strongly scratched.
• The reaction time of the strip not being right.
• Incorrect use of the tests (e. g. strips / tests not properly stored, pH range
not cor rectly adjusted).
Problem Cause
• No display • Batteries not
en
• Batteries are drained
• Display LO • Concentration is
• Display HI • Concentration is hig-
• Display - - - • No calibration pro-
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Solution
• Insert the batteries
inserted properly correctly
• Use new batteries
• State the result is
lower than the meas- smaller than the
urement range of the lowest measurement
test value
• Dilute the sample; do
her than the measu- not forget to consider
rement range of the the factor for dilution
test when reporting the
result!
• Calibrate instrument
grammed
Problem Cause
• Display OPT • Optics or strip adap-
ter is dirty
• Display ERR • Optical error
• Strip adapter is
assembled incorrectly
• Display E-1 • Surrounding is too
bright
• Strip adapter is
assembled incorrectly
• Display E-2 • Result is not plausible
Solution
• Clean optics and
adapter and switch
the RQflex® plus 10
on and then off
again; recalibrate, see
page 26
• Clean optics and
adapter; recalibrate
instrument, see page
26; if necessary, call
customer service
• Repeat measurement
in a darker place;
en
if necessary, close
the lid of the instru-
ment before switching
on
• Repeat measurement
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