Ac Voltage Measurement - HT Instruments HT14D Manuel D'utilisation

1. SAFETY PRECAUTIONS AND PROCEDURES

Avoid doing that in humid or wet places

Avoid doing that in rooms where explosive gas, combustible gas, steam or excessive dust is present

Keep you insulated from the object under test

Do not touch exposed metal parts such as test lead ends, sockets, fixing objects, circuits etc

Avoid doing that if you notice anomalous conditions such as breakages, deformations, fractures, leakages of battery liquid, blind
display etc

Be particularly careful when measuring voltages exceeding 20V to avoid risks of electrical shocks
The following symbols are used:
CAUTION - refer to the instruction manual - an improper use may damage the instrument or its components
Double insulated meter
AC Voltage
DC Voltage or Current
CAUTION: this symbol indicates that equipment, the battery and its accessories shall be subject to a separate collection
and correct disposal
2. GENERAL DESCRIPTION
The HT14D instrument performs the herewith measurements:

DC Voltage

DC Current
3. INSTRUMENT DESCRIPTION
4. OPERATING INSTRUCTIONS
4.1. DC VOLTAGE MEASUREMENT
1. Switch on the desired measurement range among the options: 200mV , 2000mV , 20V , 200V , 500V
2. Insert the test leads into the jacks, the red plug into VmAA
test leads to the positive and negative poles of the circuit under test respectively. The voltage value is displayed. Press the HOLD
key to fix the result at display. The symbol "-" on the instrument display indicates that voltage has opposite direction with regard to
the connection performed
3. If the message "OL" is displayed the higher range is reached
4.2.

AC VOLTAGE MEASUREMENT

1. Turn on the instrument in any position of the rotary switch, approach it closest to AC source and note the turn on of red LED which
is placed to the top (see Fig.1 – part 7) which detect the AC voltage
2. Switch on the desired measurement range between the options: 200V
3. Insert the test leads into the jacks, the red plug into VmAA
test leads to the circuit under test. The voltage value is displayed. Press the HOLD key to fix the result at display
4. If the message "OL" is displayed the higher range is reached
HT14D POCKET DIGITAL MULTIMETER

AC sine voltage

Resistance
Fig. 1: Instrument description
User manual

Detection of AC voltage without contact

Diode test
CAPTION:
1. LCD display
2. ON/OFF key
3. HOLD key
4. Functions selector
5. COM input jack
6. VmAA
7. Red LED for AC voltage detection
8.
Battery cover
jack and black plug into COM jack and connect the red and black
, 500V
jack and black plug into COM jack and connect the red and black
EN - 1
Release EN 1.00 - 26/11/2014

9V battery test
input jack
HT14D