HT instruments HT4022 - Manual (Page 37)

HT4020 - HT4022
EN - 4
2. GENERAL DESCRIPTION
Those instruments HT4020 and HT4022 can perform the herewith measurements:
 AC
TRMS voltage
 DC
voltage
 AC
TRMS current
 Harmonic AC voltage (from DC to 25 th
components) and THD% (HT4022)
 Harmonic AC current (from 1 st
to 25
th
components) and THD% (HT4022)
 Voltage frequency with input test leads
 Current frequency with clamp jaws
 Resistance and continuity test
 Phase rotation and coincidence test with 1 test lead
 Active, reactive, apparent power on single-phase and balanced three phase systems
 Power factor measure on single-phase and balanced three phase systems
 Active, reactive, apparent energy on single-phase and balanced three phase systems
Each parameter can be selected using the 7-position rotary switch, including an OFF
position. There are also the following buttons: "
FUNC ", “MAX/MIN/PK”, “ENERGY”
and “D-H / ” (HT4020) or "
FUNC / HARM", “MAX/MIN/PK / H”, “ENERGY / H” and
“D-H / ” (HT4022). For their use please see § 4.2. The selected quantity appears on a
high-contrast display with unit and function indication.
3. PREPARATION FOR USE
3.1. PRELIMINARY CHECKS
This instrument has been checked mechanically and electrically before shipment. All
precautions have been taken to assure that the instrument reaches you in perfect
condition.
However, it is advisable to carry out a rapid check in order to detect any possible damage,
which might have occurred in transit.
Check the accessories contained in the packaging to make sure they are the same as
reported in § 6.3.1.
3.2. POWER
SUPPLY
The instrument is supplied with 2x1.5V AAA batteries. The instruments battery life is about
90 hours. The "
" symbol appears when the batteries are nearly discharged. Replace
them following the instructions in § 5.2.
3.3. CALIBRATION
The tester complies with the accuracy specifications listed in this manual and such
compliance is guaranteed for one year, afterwards the tester may need recalibration.
3.4. STORAGE
In order to guarantee the accuracy of the measurements, after a period of storage in
extreme environmental conditions wait for the tester to stabilize to within the specified
operating conditions (see § 6.2.1) before use.