Operating Instructions - Ht Instruments Ht4010 Bedienungsanleitung

By pushing HOLD key the parameter's measured value is frozen on
the display and the symbol "HOLD" appears on it. Pushing HOLD key
another time deactivates this mode
key
By pushing and hold
backlight function on the display. By pressing and hold
for approx.. 3s to exit from the function or waiting the automatically
disable after about 20 seconds. The function is available on each
position of the rotary selector
RANGE key
By pushing RANGE key, the manual mode is activated, and the
"AUTO" symbol disappears from the display. Press RANGE cyclically
to change the measuring range and fix the decimal point on the
display. For reading more than the maximum range the "OL"
indication is shown at display. To exit this function, keep RANGE key
pressed for at least 1 second or rotate the selector to another
position. This feature is disabled for AC current diode test and
continuity test measurements
MAX key
By pushing MAX key, maximum value are measured. The symbol
corresponding "MAX" is displayed. This value is stored and
automatically updated as soon as an higher value is measured by
meter. Press MAX key again or rotate the selector to another
position to exit from this function. This feature is disabled for
resistance, diode test and continuity test measurements
MODE key
By pushing MODE key the selection of a double measured functions
which are present at display is possible. In particular this key is
active only in 
/
diode test and continuity test
Detection of AC voltage without contact
•
Firstly, use the NCV sensor on a known AC source to
verify its proper operation
•
The thickness of the cable
the distance from the source may influence the
operation
1. The NCV function is always active even with the instrument off
Take the instrument near an AC source and look for the red LED
on the top to turn on (see Fig. 1 – part 2); this indicates that the
instrument has detected the source's presence

5. OPERATING INSTRUCTIONS

32
key for about 1s it's possible to activate the
position to select among resistance test,
ATTENTION
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s insulating sheath and
HT4010
key again