HT instruments HT710 - Manual (Page 27)

HT710
EN - 5
4. OPERATING INSTRUCTIONS
4.1. INSTRUMENT - DESCRIPTION
4.1.1. Front
panel
Fig. 1: Instrument description
LEGEND:
1. V+/Ω input terminal
2. REL key
3. HOLD key
4. COM input terminal
5. LCD
6. RANGE key
7. Rotary selector
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. REL
The REL function subtracts a stored value from the present measurement and displays the
result. Press “
” to set the relative mode. It will set the display to zero and stores the
displayed reading as a reference value, also “REL” is displayed. Press this button again to
exit the relative mode.
4.2.3. RANGE
In autorange press “
” button momentarily to select manual range and turn off the
“AUTO” symbol. In manual range, press this button momentarily to step up 1 range at one
time, press this button for more than 1 second to select autorange. In autorange, the meter
will select an appropriate range for measurement being made.
4.3. SPECIAL FUNCTIONS
4.3.1. Turning on
When the instrument is turned on, all display segments are lit for just one second. Then
the instrument is ready for operation.
4.3.2. Auto power off
The instrument automatically turns off 15 minutes after last pressure of keys or last
selector rotation. To resume operation turn the selector on OFF and turn on the instrument
again.