HT INSTRUMENTS HT14D Pocket Digital Multimeter User Manual

HT INSTRUMENTS HT14D Pocket Digital Multimeter

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

OPERATING INSTRUCTIONS

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 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
3. If the message “OL” is displayed the higher range is reached

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 , 500V
3. 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
4. If the message “OL” is displayed the higher range is reached

DC CURRENT MEASUREMENT

1. Power off the circuit under test
2. Switch on the desired measurement range between the options: 2000 A , 200mA
3. 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
4. If the message “OL” is displayed the higher range is reached

RESISTANCE MEASUREMENT

1. Switch on the desired measurement range among the options: 2000k , 200k  20k , 2000 , 200
2. 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
3. If the message “OL” is displayed the higher range is reached

DIODE TEST

Switch on the position

1. 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
2. If the message “OL” is displayed the diode terminals are reversed or the diode P-N junction is damaged

BATTERY TEST

1. Switch on the position 9V BATTERY
2. 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

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

INTERNAL FUSE REPLACEMENT

1. Turn off the instrument by means ON/OFF key
2. Disconnect the test leads from the input terminals
3. Remove the fixing screws from the back case and detach it
4. Replace the fuse with a new one of the same type (200mA/600V, Fast)
5. 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)

GENERAL SPECIFICATIONS

• Input impedance: 1M
• Diode test: Max test current 1mA, open voltage 2.8V DC (typical)
• Over range indication: “OL” symbol at display
• Display: LCD, 3½ dgt, 2000 counts + symbol and decimal point
• Sampling rate: 2 times/second
• Low battery indication: “BAT” symbol at display
• Power supply: 1x12V battery type MS21 / MN21
• Protection fuse: Fast, 200mA/600V, 5x20mm (“mA” and “A” inputs)
• Safety: IEC/EN61010-1
• Insulation: double insulation
• Pollution degree: 2
• Measurement category: CAT III 300V, CAT II 600V
• Max height of use: 2000m (7000ft)
• Dimensions (L x W x H): 105 x 50 x 25mm (4 x 2 x 1in)
• Weight (included battery): 100g (4 ounces)
• Standard accessories: couple of test leads, battery, user manual

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