HT instruments HT712 - Manual (Page 7)

HT712
EN - 6
4. OPERATING INSTRUCTIONS
4.1. INSTRUMENT - DESCRIPTION
4.1.1. Front
panel
Fig. 1: Instrument description
LEGEND:
1. Test probe
(accessory)
2. V+/Ω input terminal
3. DISP key
4. HOLD key
5. Metallic pad
6. COM input terminal
7. Rotary selector
8. MEAS key
9. LCD
4.2. FUNCTION
KEYS
Once pressed, the relevant symbol appears on the display and the buzzer beeps. Every
time the selector is rotated all functions activated by means of the function keys are
cancelled.
Fig. 2: Function keys
4.2.1. HOLD
The data HOLD function key holds the displayed value. Press “
” to activate or
deactivate. When the data HOLD function is active the symbol “H” is displayed.
4.2.2. DISP
Press “
” key to display voltage and frequency values during AC voltage
measurements.
4.2.3. MEAS
Press “
” key to clear the display after phase sequence and phase conformity
measurements, and prepare the instrument for further operations.
4.3. SPECIAL FUNCTIONS
4.3.1. Turning on
When the instrument is turned on, all display segments and the LEDs are lit for just one
second. Then the instrument is ready for operation.
4.3.2. Auto power off
The instrument automatically turns off 5 minutes after last pressure of keys or last selector
rotation. To resume operation turn the selector on OFF and turn on the instrument again.