HT INSTRUMENTS HT14D Pocket Digital Multimeter User Manual

: June 4, 2024
: HT INSTRUMENTS

Table of Contents

HT INSTRUMENTS HT14D Pocket Digital Multimeter
SAFETY PRECAUTIONS AND PROCEDURES
GENERAL DESCRIPTION
INSTRUMENT DESCRIPTION
OPERATING INSTRUCTIONS
BATTERY REPLACEMENT
INTERNAL FUSE REPLACEMENT
TECHNICAL SPECIFICATIONS
GENERAL SPECIFICATIONS
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HT INSTRUMENTS HT14D Pocket Digital Multimeter

HT-INSTRUMENTS-HT14D-Pocket-Digital-Multimeter-product-
image

HT14D POCKET DIGITAL MULTIMETER

User manual

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

GENERAL DESCRIPTION

The HT14D instrument performs the herewith measurements:

DC Voltage
AC sine voltage
Detection of AC voltage without contact
DC Current
Resistance
Diode test
9V battery test

INSTRUMENT DESCRIPTION

HT-INSTRUMENTS-HT14D-Pocket-Digital-Multimeter-01

OPERATING INSTRUCTIONS

DC VOLTAGE MEASUREMENT

Switch on the desired measurement range among the options: 200mV , 2000mV , 20V , 200V , 500V
Insert the test leads into the jacks, the red plug into V mA A jack and black plug into COM jack and connect the red and black 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
If the message “OL” is displayed the higher range is reached

AC VOLTAGE MEASUREMENT

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
Switch on the desired measurement range between the options: 200V , 500V
Insert the test leads into the jacks, the red plug into V mA A jack and black plug into COM jack and connect the red and black test leads to the circuit under test. The voltage value is displayed. Press the HOLD key to fix the result at display
If the message “OL” is displayed the higher range is reached

DC CURRENT MEASUREMENT

Power off the circuit under test
Switch on the desired measurement range between the options: 2000 A , 200mA
Insert the test leads into the jacks, the red plug into V mA A jack and black plug into COM jack. Connect the red and the black plugs in series with the circuit whose current is to be measured respecting the polarities. Energize the circuit under test. The current value will be displayed. Press the HOLD key to fix the result at display. The symbol “-” on the instrument display indicates that current has opposite direction with regard to the connection performed
If the message “OL” is displayed the higher range is reached

RESISTANCE MEASUREMENT

Switch on the desired measurement range among the options: 2000k , 200k 20k , 2000 , 200
Insert the test leads into the jacks, the red plug into V mA A jack and black plug into COM jack and connect the red and black test leads to the circuit under test. The resistance value is displayed. Press the HOLD key to fix the result at display
If the message “OL” is displayed the higher range is reached

DIODE TEST

Switch on the position

Insert the test leads into the jacks, the red plug into V mA A jack and black plug into COM jack and connect the red test lead and the black test lead on the anode and cathode of the diode respectively. The threshold voltage value (mV) is displayed
If the message “OL” is displayed the diode terminals are reversed or the diode P-N junction is damaged

BATTERY TEST

Switch on the position 9V BATTERY
Insert the test leads into the jacks, the red plug into V mA A jack and black plug into COM jack and connect the red test lead and the black test lead on positive and negative pole of a 9V (IEC 6F22) battery respectively. The voltage value is displayed

BATTERY REPLACEMENT

Turn off the instrument by means ON/OFF key
Disconnect the test leads from the input terminals
Remove the fixing screw from the battery cover and detach it
Replace the battery with a new one of the same type (12V MN21) observing the proper polarities
Replace the battery cover and screw
Use the appropriate battery disposal methods for your area1. Turn off the instrument by means ON/OFF key
Disconnect the test leads from the input terminals
Remove the fixing screw from the battery cover and detach it
Replace the battery with a new one of the same type (12V MN21) observing the proper polarities
Replace the battery cover and screw
Use the appropriate battery disposal methods for your area

INTERNAL FUSE REPLACEMENT

Turn off the instrument by means ON/OFF key
Disconnect the test leads from the input terminals
Remove the fixing screws from the back case and detach it
Replace the fuse with a new one of the same type (200mA/600V, Fast)
Replace the back case and screws

TECHNICAL SPECIFICATIONS

The accuracy is indicated as [% rdg + (num. dgt* resolution)] at 18°C 28°C, <75%RH

Function| Range| Resolution| Accuracy| Overload protection
---|---|---|---|---

DC Voltage

| 200.0mV| 0.1mV|

±(0.5%rdg + 2 dgt)

| 200Vrms
2000mV| 1mV|

500V DC/AC

20.00V| 0.01V
200.0V| 0.1V
500V| 1V| ±(0.5%rdg + 4 dgt)
AC Voltage (50/60Hz)| 200.0V| 0.1V| ±(1.2%rdg + 10dgt)| 500V AC
500V| 1V
DC Current| 2000mA| 1mA| ±(1.2%rdg + 2 dgt)| Fuse fast 200mA/600V
200.0mA| 0.1mA| ±(1.5%rdg + 2 dgt)

Resistance

| 200.0W| 0.1W|

±(0.8%rdg + 4 dgt)

|

250Vrms for 15s max

2000W| 1W
20.00kW| 0.01kW
200.0kW| 0.1kW
2000kW| 1kW| ±(1.5%rdg + 2 dgt)
Battery test| 9V| 10mV| ±(1.2%rdg + 2 dgt)