Wide/50-60Hz/Compare Key; Range Key; Auto Backlight Sensor - HT HT77N Manual De Instrucciones

HT77N

4.2.2. Wide/50-60Hz/Compare key

Wide/50-60Hz
Shortly pressing the Wide/50-60Hz/Compare key allows enabling the low-pass filter,
which has a cutting frequency of approx. 100Hz. When the function is enabled, the full
scale is forced in manual mode and the display shows "50-60Hz". Shortly pressing the
Wide/50-60Hz/Compare key again, with enabled function, allows disabling the low-pass
filter and going back to the normal measuring mode.
Compare
Long pressing the Wide/50-60Hz/Compare key (> 1 second) allows enabling the
Compare function. The display shows "Compare" and the set current limit value flashes.
By pressing the Range key it is possible to set the limit comparison current among the
following values: 0.25mA, 0.50mA and 3.5mA. To confirm the set value, press the
Wide/50-60Hz/Compare key again. With active Compare function, if the measured current
exceeds the set limit value, the internal buzzer sounds continuously and the current value
shown on the display flashes. Long pressing the Wide/50-60Hz/Compare" (> 1 second)
key again, with enabled function, allows disabling the Compare function and going back to
the normal measuring mode.

4.2.3. Range key

Shortly pressing the Range key allows setting the measuring full scale in manual mode. In
this condition, the display does not show "Autorange". Pressing the Range key again
allows setting the desired full scale. To restore the Autorange mode, press the Range key
for a time > 2 seconds.

4.2.4. Auto Backlight sensor

The clamp is equipped with a brightness sensor which, in case of low light, automatically
activates the display's backlight.
EN - 7