Fluke MicroMapper Pro Instruction Sheet page 15

Calibrating Length Measurements
Length measurements are based on nominal parameters for each cable type.
Variances in cables from different batches or different manufacturers can
cause length measurements to vary up to 20% for the same cable type.
For more accurate measurements, calibrate the tester to the cable under
test:
1 In the setup menu, select the type of cable to be tested.
2 Connect a good cable of a known length between 15 m and 100 m to the
appropriate connector on the tester. Do not use a patch cord to connect the
cable to the tester.
3 Press S; then press A until the display shows
4 Press D so the display shows
5 Press Sto exit setup mode and enter length calibration mode.
If the attached cable is too short or has some other problem, the display
too 5hort
shows
connections and the cable; then start again at step 3.
6 Press D or C to adjust the displayed length to match the known length
of the cable; then press A.
The tester shows
was successful.
If the tester shows
the cable; then repeat the calibration procedure.
After calibration, the cable type in setup changes to user-defined (
CAL yES
(too short) or
CAL PASS
(calibration pass) to indicate the calibration
CAL FAiL
(calibration fail), check the connections and
CAL no
; then press A.
bAd CAbLE
(bad cable). Check the
.
USEr
).