JN28D - Mètre VOLTCRAFT - Free user manual and instructions

Product Type	Digital Multimeter
Model	JN28D
Brand	VOLTCRAFT
Dimensions (approx.)	7.1 x 3.5 x 1.6 in (180 x 89 x 40 mm)
Weight (approx.)	0.5 lbs (220 g)
Power Supply	9V battery (NEDA 1604, 6F22)
Display	LCD, 2000 counts
DC Voltage Range	200 mV to 600 V
AC Voltage Range	200 V to 600 V
DC Current Range	2 mA to 10 A
Resistance Range	200 Ω to 2 MΩ
Continuity Test	Yes, audible beep
Diode Test	Yes
Battery Test	1.5V & 9V
Safety Rating	CAT II 600V
Overload Protection	Yes, on all ranges
Data Hold	Yes
Auto Power Off	Yes (approx. 15 min)
Low Battery Indication	Yes, symbol on display
Operating Temperature	0°C to 40°C (32°F to 104°F)
Storage Temperature	-10°C to 50°C (14°F to 122°F)
Included Accessories	Test leads, 9V battery, user manual
Maintenance	Clean with damp cloth; no solvents
Reparability	Powered by standard battery; fuse replaceable

Frequently Asked Questions - JN28D VOLTCRAFT

How do I measure DC voltage with the JN28D?

Set the rotary switch to the V DC position (usually marked with a V and a straight line). Connect the black test lead to COM and red to V/Ω. Touch the probes to the circuit and read the value on the display.

What is the input impedance of the voltage ranges?

The input impedance is approximately 1 MΩ for DC and AC voltage ranges, ensuring minimal loading effect on high-impedance circuits.

Can I measure AC current?

Yes, the JN28D can measure AC current up to 10 A. Switch to the A AC position and insert the test leads in series with the load. Note that for currents above 200 mA, use the 10A jack.

How do I test continuity?

Turn the rotary switch to the continuity/buzzer position (symbol: sound waves). Connect the probes; a beep indicates continuity if the resistance is below about 30 Ω.

Why does the display show '1' or 'OL'?

'1' or 'OL' indicates an overload or open circuit. The measured value exceeds the selected range; switch to a higher range if possible or check your connections.

How do I replace the battery?

Turn off the meter and remove the test leads. Unscrew the battery cover screw on the back, slide off the cover, and replace the 9V battery (NEDA 1604/6F22). Reattach cover.

What is the safety category of the JN28D?

The JN28D is rated CAT II 600V. It is suitable for measuring on circuits directly connected to low-voltage installations (household outlets).

Can I measure temperature?

The JN28D does not have a temperature measurement function. It is a basic multimeter for voltage, current, resistance, and continuity.

What does the 'Auto Power Off' function do?

The meter automatically shuts off after 15 minutes of inactivity to save battery. To wake it, rotate the switch or press a button (if available).

How do I clean the multimeter?

Disconnect test leads and remove battery. Wipe the casing with a damp cloth and mild detergent. Do not use solvents or immerse the meter.

USER MANUAL JN28D VOLTCRAFT

NÁVOD K OBSLUZE

Hand holding a metallic rotary knob with a black handle (no visible text or symbols)