HP 850F Operating Manual page 7

Digital power clamp meter
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SAVE
SELECT
MIN /▼
CLEAR
●At Active power (main display) + Phase angle (secondary
display) mode, press ∑once button to sum up the current
first phase of 3 phase measurement result. Then carry out
second phase power measurement.
● Press ∑ again to sum up the second phase power
measurement result, then carry out third phase power
measurement.
● Press ∑ again to sum up the third phase power
measurement result, then press SELECT to enter the
measurement of sum of the watts mode, the display
shows the 3 phase sum of the watts value.
● If got needless phase result when measure 2 phases,
don't press Σ , just press SELECT for skip direct, and got
the total power of 2 phases .
● Press once to store single reading, MEM appears
and the Meter beeps.
●The maximum number of data store is 99, when it
achieves 99, the Meter shows FUL. Press CLEAR to
clear the stored reading in order to store next reading.
● At active power (main display) + phase angle
(secondary display) mode, press SELECT button to
step through first phase, second phase, third phase
and sum of watts.
● At other mode, press SELECT to step through first
phase, second phase and the third phase.
●Press to start recording of minimum value, it valid at
voltage, current, active power and apparent power
ranges only.
● Press once at LOAD mode, MR icon
shown, the Meter displays the previous stored reading,
the left secondary display showing the index decrease
one.
● Press once at mode, CAL icon shown,
the Meter steps through sum of active power (main
display) + sum of reactive power (secondary display)
and sum of power factor (main display) + sum of
apparent power.
● At active energy range, press to reset time the zero,
then restart the timing.
● At all other ranges, press to clear stored readings.
7

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