Trifitek TR-79, Руководство пользователя, Страница: 37 / 46

14
main display displaying reading as the reference value. LCD “ ” turns on. Press the
ZERO (HOLD) button for one second or more to toggle Relative-Zero mode.
DC-Zero mode is set instead of Relative-Zero mode, however, to only offset the non-
zero DCA residuals caused by magnetic hysteresis of the jaws as in DCA & DC+ACA
functions. Press the ZERO (HOLD) button for one second or more to activate/ re-
activate this mode. Apply this mode before making any single DCA or DC+ACA
measurement for best measuring accuracy. The meter shows “dc_0” shortly to confirm
activation before continuing measurements. The beeper will sound 3 short beeps,
however, to warn for null activation if the residual is beyond a reasonable hysteresis
reading of -5 to 5 DCA.
80ms PEAK-RMS mode
Press PEAK-RMS button for one second or more to toggle PEAK-RMS mode to
capture inrush current or voltage RMS values in duration as short as 80ms. LCD
turns on. Auto-Power-Off is disabled automatically in this mode.
Backlighted LCD display
Press the SELECT button for 1 second or more to toggle the LCD backlight. The
backlight will also be turned off automatically after 32 seconds to extend battery life.
Intelligent Auto-Power-Off (APO)
The Auto-Power-off (APO) mode turns the meter off automatically to extend battery life
after approximately 32 minutes of no specified activities, where applicable:
1) Rotary switch or push button operations
2) Significant measuring readings of above 8.5% of ranges
3) Non-OL readings for Resistance, Continuity or Diode function
4) Non-zero readings for Hz function
5) Significant movement indication as in Phase Rotation functions
In other words, the meter will intelligently avoid entering the APO mode when it is under
normal measurements. To wake up the meter from APO, press the SELECT button
momentarily and release, or turn the rotary switch OFF and then back on. Always turn
the rotary switch to the OFF position when the meter is not in use