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In the this mode, press HOLD key to stop the recording of readings, all
values are frozen, press again to restart recording.
To prevent accidental loss of MIN, MAX and AVG data, in this mode can only
be cancelled by pressing and hold down the MIN MAX key for 2 seconds to
exit and erased recorded readings.
WARNING
MIN, MAX and AVG readings can be recorded for a period of up to 20 hours
maximum. If this 20 hours period is exceeded the unit readings will not be
accurate.
REL Relative mode (only Main display)
Pressing REL key to enter the Relative mode, zero the display, and store
the displayed Reading as a reference value and annunciator REL is
displayed. Press REL key again to exit the relative mode.
The relative value can also be entered by the user. (See "SET mode" later
in this manual.)
When the desired Relative value has been entered, press REL key to enter
the Relative mode, press SET key use set Relative value as a reference
value. Press REL key again to exit the relative mode.
In the Relative mode, the value (can not >±3000.0 counts) shown on the
LCD is always the difference between the stored reference and the present
reading.