HT21
EN - 4
2. GENERAL DESCRIPTION
The HT21 meter performs, in completely Autorange, the herewith measurements:
DC
Voltage
AC sine voltage
Resistance and Continuity test
Capacitance
Frequency
Duty
cycle
Diode
test
All selectable by means of a 5 position rotary selector (including OFF position). Also are
available the
HOLD
/
key to hold the displayed value and enable/disable backlight
feature, the
Hz%
key for manual selection of frequency and duty cycle measurements, the
REL
key for Relative measures and the
MODE
key for selection of different features which
are common to the same position of rotary selector. The selected quantity is displayed with
indication of measuring unit and active functions. The instrument disposes of an Auto
Power Off function consisting in an automatic switching off 30 minutes after last selector
rotation.
3. PREPARATION FOR USE
3.1. INITIAL
This instrument was checked both mechanically and electrically prior to shipment. All
possible cares and precautions were taken to let you receive the instrument in perfect
conditions.
Notwithstanding we suggest you to check it rapidly (eventual damages may have occurred
during transport – if so please contact the local distributor from whom you bought the
item).
Make sure that all standard accessories mentioned in § 6.3.1 are included.
Should you have to return back the instrument for any reason please follow the
instructions mentioned in § 7.
3.2. SUPPLY
VOLTAGE
The instrument is supplied by 1x9V battery type IEC 1604 NEDA 6F22. When battery is
low, a “
” low battery indication is displayed. To replace/insert battery please refer to §
5.2.
3.3. CALIBRATION
The instrument complies with the technical specifications contained in this manual and
such compliance is guaranteed for 1 year. Annual recalibration is recommended.
3.4. STORAGE
After a period of storage in extreme environmental conditions exceeding the limits
mentioned in § 6.2.1 let the instrument resume normal measuring conditions before using
it.
