General DT61 Manual Del Usuario página 10

After adjusting the APO triggering time, press the
SETUP button again to proceed to Step 4.
Step 4 enables you to reset the relative time clock to
a time other the default value: how long it has been
since the thermometer was powered on. The usual
reason to change the value is to establish a new
"zero" for the measurement timeline following any
change that does not involve powering the
thermometer off.
At the beginning of Step 4, the term S - t appears on
the primary readout with 00:00 (hours and minutes)
showing on the relative time clock readout (Fig. 2,
Callout 15). To switch the display to show minutes
and seconds, press the HOLD (ENTER) button. The
relative clock setting can be adjusted to any value
between 0 and 24 hours, with 1-second resolution.
Each press of the button increases the setting
by 1 minute or 1 second, and each press of the
button decreases it by 1 minute or 1 second.
You can press and hold either button to make a large
change quickly.
After adjusting the relative time clock, press the
SETUP button again to proceed to Step 5.
Step 5 enables you to compensate for thermocouple
measurement errors caused by nearby power lines.
By default, the thermometer automatically
compensates for the effects of electric power
transmission and distribution at a frequency of 60Hz.
Upon entering Step 5, the thermometer shows the
term LinE on the primary readout and 60H on the
secondary readout. Press either the or button
to change 60H to 50H if your local power grid
operates at 50Hz.
After adjusting the relative time clock, press the
SETUP button again to proceed to Step 6.
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