Amprobe DM-4 Power-Quality-Recorder - Manual (Page 40)

1) Check, and if needed modify, the basic settings of the instrument (see
paragraphs 5.2 and 5.3). Particularly, the 3 wires mode must be set.
2) Connect the phase and neutral voltage wires respecting the connections shown
in the picture.
3) If you want to measure current and power, connect the clamp meter to the phase
conductor respecting the specifications shown on the clamp and the connections
shown in the picture. Check if:
a) The phase sequence is correct
b) The active power P of each phase is positive.
c) The value of the Pf of each phase is not excessively low (typically it’s not lower
than 0.4). In case the Pf is lower than 0.4, check if the phase voltage is
associated to the right clamp meter (for example the voltage of phase 1 must
be associated to the clamp meter no. 1).
d) After checking, and if needed modifying, the connection of the instrument to
the equipment re-set the 3 wires mode and the connections shown in the
picture (yellow and red wire together).
4) Apply voltage to the electrical equipment under test (if previously shut off for the
instrument connection).
5) The values of the available electrical parameters will be displayed of the instrument.
6) If you want to record:
a) Check and eventually modify the values of the basic parameters (see
paragraphs 5.2-5.3).
b) Check and eventually modify the recording parameters (see How to set the
parameters using Remote User Interface (PDA).
c) To start the recording press RECORD
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DM-4 Power Quality Recorder