Futrex 5000/XL - Manual (Page 36)

35
PROBLEM
PROBABLE CAUSE
CORRECTIVE MEASURES
1) Display shows "LOBAT"
Batteries are low
a) Replace batteries (Refer to page 3).
2) Display shows "1999.9" or
"-1999.99"
a) Bad connection between Light Wand
and Probe Socket
b) Too much/too little light
a) Be sure the Light Wand is properly
inserted into the Probe Socket.
b) Be sure the Light Wand is properly
seated in the Optical Standard when
Zero Adjusting.
3) Poor Repeatability
a) Inconsistent measurement technique
a) Make sure you are applying enough
pressure between the Light Wand and
the subject's arm.
b) The silver line on the Light Wand
must be aligned with the line on the
Optical Standard when Zero Adjusting.
c) When taking a measurement, the
sliver line on the Light Wand must point
toward the subject's shoulder.
d) Use the Light Shield to block the
external light. Always avoid
measurements under strong lights (e.g.
direct sunlight) because errors may
occur.