Triplett TDR - Manual (Page 15)

Page 14
If display reads:
Then the adaptor lead needs replacing or repairing.
If display shows:
Check cable under test for short circuit at less than 7.5ft. Check that termi-
nators have been removed from network. Length to short circuit is outside
of range, check by reconnecting to opposite end of cable if possible.
If the display shows:
Replace battery.
If the display is blank:
Check if good battery is installed in TDR. Install or replace battery
If cable length measurement appears to be inaccurate:
Check that cable type or Vp value have been correctly selected Conductors
within cable may be broken, select alternative conductors if available.
Length
Out of Range
Short
Out of Range
Low
Battery