PeakTech 1650 Manual De Instrucciones página 29

COM Terminal
This is the negative (ground) input for all measurement modes
except current. Connection is made to it using the black test leads.
V/Hz/ Input Terminal
This is the positive input terminal for voltage, capacitance,
frequency, ohms and diode measurements. Connection is made
to it using the red test lead.
Display
The display indicates the measured value of a signal, function
mode symbols and bargraph.
Function/Range selector rotary switch
This rotary switch selects the function and selects the desired
range (current measurements).
Hold Button
Press HOLD button to toggle in and out of the Data Hold mode. In
the Data Hold mode, the "HOLD" annunciator is displayed and the
last reading is frozen on the display. Press the HOLD button again
to exit and resume readings.
REL- Button
Press ZERO button to enter the relative mode, the ZERO 
annunciator turns on, zero the display and store the displayed
reading as a reference value. Press and hold down the ZERO
button for 2 seconds to exit the relative mode.
In the relative mode the value shown on the LCD is always The
difference between the stored reference value and the present
reading. For example, if the reference value is 24.000 V and the
present reading is 12,50 V the display will indicate –11,50 V. If the
new reading is the same as the reference value, the display will be
zero. This feature also is made as DCA ZERO adjustment.
Transformer jaws
Pick up the AC or DC current flowing through the conductor.
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