Clamp-on Meter Model 566
7
2.4.3 ZERO (Relative) Button
This function can be used to compare two voltage
measurements (e.g. to determine a voltage drop) or to
compensate for the resistance of the leads when making
low resistance measurements.
1. Press the
ZERO
button to enter Zero mode. The
ZERO
symbol appears on the display. The reading
is stored as a reference value for subsequent
measurements.
2. To exit Zero mode, press the
ZERO
button again.
2.4.4 Backlight Button
Press the button to turn the backlight on. Press it
again to turn it off. When the backlight is on, the meter
will automatically turn it off after about 30 seconds.
2.4.5 Auto-OFF
The Model 566 will automatically shut down if there is no
activity for approximately 30 minutes.
1. To disable the Auto-OFF function, turn the rotary
switch to
OFF.
2. Press and hold down the
HOLD
button and set the
rotary switch to any position other than
OFF.
3. The symbol disappears and the Auto-OFF
feature is deactivated.
Summary of Contents for 2139.83
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