APM SP-300 Series, User Manual

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2.1.2 Measurement Setting
1. In the ‘Settings’ screen, press the ‘Measure Setting’ soft key to display the ‘Measure’ screen
shown below.
2. Move the cursor to highlight the position you would like to edit, then press the [Enter] key to
display a on-screen touch pad containing all 15 measurements and a Hide button. Select
the desired read-out at this position by pressing it or press Hide if you want no readout at
this position.
!
Warning
!
The upper limit for Programmable output impedance is 1.0 Ohm / 1.0 mH. If L is more than
0.5 mH and the output voltage is low (e.g. less than 100Vac), any large load current may
cause an unstable output voltage. It is important that the user adjusts the L value slowly
while monitoring the output voltage and listening for any unusual sounds coming from the
power source. If any unusual high frequency output voltage is observed or any abnormal
sound is heard, DO NOT use this feature. Instead, use an external actual impedance circuit
in series with the load.
The AC source support 15 different output measurements. All 15 can be displayed at the same
time in the Measurement display area of the Main screen.
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Glossary of Terms
V , the RMS of total output voltage (Vac and Vdc), measured in volts.
Vac , AC output voltage, measured in volts.
Vdc , DC output voltage, measured in volts.
Vpk , Peak-peak output voltage, measured in volts.
I , the RMS of total output current (Iac and Idc), measured in amps.
Iac , AC output current, measured in amps.
Idc , DC output current, measured in amps.
Ipk , Peak-peak output current, measured in amps.
Is , surge current, measured in amps.
F , the output frequency, measured in Hz.
PF , output power factor, PF=P/VA.
CF , crest factor, CF=Ipk/I.
VA , the apparent power consumed by the load due to real and reactive circuit components,
measured in VA.
VAR , the power absorbed by capacitive or inductive elements in a circuit, measured in VAR.
P , active power, measured in watts.
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