TTI 1705 - Page 25

Watts
The Watts function calculates power using the formula
Watts = V
2
/R
It can only be run when Vdc or Vac are selected in the main display. The reference impedance
can be set anywhere between 1 and 99999 Ohms.
To select Watts press the FUNCTION key until the W symbol flashes in the menu of modifiers.
Pressing Edit will then permit the reference impedance to be set as described earlier in the
Number Editing section; rEF shows in the main display while the reference impedance (in the
secondary display) is being edited.
VA
The VA function calculates power by multiplying voltage and current readings. The meter must be
connected for both voltage and current measurement, see Making Voltage and Current Dual
Measurements section, with Vdc or Vac selected for the main display.
To select VA press the FUNCTION key until the VA symbol flashes in the menu of modifiers.
Pressing Run will run the modifier; the meter automatically switches to dual measurement mode
and selects Iac or Idc as the secondary measurement for Vac or Vdc main display settings
respectively. The VA symbol will show in the display and the secondary display will show the
power in VA units.
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