Resistance Measurement; Diodetest; Battery Test; Battery Replacement - HT Instruments HT14D Manuel D'utilisation

4.3. 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
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
4.4.

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
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
4.5. DIODE TEST
1. Switch on the position
1. Insert the test leads into the jacks, the red plug into VmAA
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
4.6.

BATTERY TEST

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

5. 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 area
6. 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

7. TECHNICAL SPECIFICATIONS

The accuracy is indicated as [% rdg + (num. dgt* resolution)] at 18°C  28°C, <75%RH
Function
200.0mV
2000mV
DC Voltage
AC Voltage
(50/60Hz)
DC Current
200.0mA
Resistance
20.00k
200.0k
Battery test

8. GENERAL SPECIFICATIONS

Input impedance:
Diode test:
Over range indication:
Display:
Sampling rate:
Low battery indication:
Power supply:
Protection fuse:
Safety:
Insulation:
Pollution degree:
Measurement category:
Max height of use:
Dimensions (L x W x H):
Weight (included battery):
Standard accessories:
Range Resolution
0.1mV
1mV
20.00V 0.01V
200.0V 0.1V
500V 1V
200.0V 0.1V
500V 1V
2000A 1A
0.1mA
200.0 0.1
2000 1
0.01k
0.1k
2000k 1k
9V 10mV
1M
Max test current 1mA, open voltage 2.8V DC (typical)
"OL" symbol at display
LCD, 3½ dgt, 2000 counts + symbol and decimal point
2 times/second
"BAT" symbol at display
1x12V battery type MS21 / MN21
Fast, 200mA/600V, 5x20mm ("mA" and "A" inputs)
IEC/EN61010-1
double insulation
2
CAT III 300V, CAT II 600V
2000m (7000ft)
105 x 50 x 25mm (4 x 2 x 1in)
100g (4 ounces)
couple of test leads, battery, user manual
jack and black plug into COM jack. Connect the red and the black
jack and black plug into COM jack and connect the red and black
jack and black plug into COM jack and connect the red test lead
jack and black plug into COM jack and connect the red test lead
Accuracy
±(0.5%rdg + 2 dgt)
±(0.5%rdg + 4 dgt)
±(1.2%rdg + 10dgt)
±(1.2%rdg + 2 dgt)
±(1.5%rdg + 2 dgt)
±(0.8%rdg + 4 dgt)
±(1.5%rdg + 2 dgt)
±(1.2%rdg + 2 dgt)
EN - 2
HT14D
Release EN 1.00 - 26/11/2014
Overload protection
200Vrms
500V DC/AC
500V AC
Fuse fast 200mA/600V
250Vrms for 15s max