Somogyi Elektronic SMA 19, Instruction Manual

Use „SEL” pushbutton to set direct current (

) function. Interrupt the circuit 

whose current is to be measured then connect the probe to the points to be 

measured.

Measurement limit

Resolution

 Accuracy (18 – 28°C)

60 µA

0,01 µA

± (0,8% + 3 dg.)

600 µA

0,1 µA

6 mA

0,001 mA

60 mA

0,01 mA

600 mA

0,1 mA

10 A

10 mA

± (1,2% + 3 dg.)

Overload protection: 

FF 600 mA / 1000 V

,  

in 10 A position: 

FF10A/1000 V

Maximum input current: 

600 mA DC/AC

,  

in 10 Amper position: 

10 A DC/AC

When the measured current is bigger than 5 A, continuous measuring time 

can not be longer than 10 seconds, and at least 1 minute has to be spent 

between two measuring.

Measurement of AC  (µA , mA , 10 A )

Connect the black probe cable to the “COM” socket. Connect the red probe 

cable and set the selector dial according to the current values to be measured:

Current to be 

measured

Red probe cable 

connection (socket)

Dial setting

0-4mA

µA mA

µA   

4-400mA

µA mA

mA   

0,4-10A

10A

A 

Use the  „SEL” button to set alternating current (

) function. Interrupt the 

circuit whose current is to be measured then connect the probe to the points 

to be measured.

Measuring limit

Resolution

 Accuracy (18 – 28°C)

60 µA

0,01 µA

± (1% + 3 dg.)

600 µA

0,1 µA

6 mA

0,001 mA

60 mA

0,01 mA

600 mA

0,1 mA

10 A

10 mA

± (1,5% + 3 dg.)

Overload protection: 

FF 600 mA / 1000 V

,  

in 10 Amper range: 

FF10A/1000V

Maximum input current: 

600 mA DC/AC

,  

in 10 Amper position: 

10A DC/AC

When the measured current is greater than 5 A, duration of continuous 

measuring should not be longer than 10 seconds, and at least 1 minute has 

to be spent between two measuring.

Frequency response: 40Hz-1kHz True RMS

FREQUENCY MEASUREMENT 

Connect the red probe cable to the 

 socket, and the black one to the 

“COM” socket. Set the dial to the „Hz%” function. Use the „Hz%” push button 

to set the frequency (Hz) function. Connect the measurement probe to the 

circuit to be measured.

Note: Frequency measurement only works with automatic measurement ran-

ge selection. Do not exceed the input voltage as this may damage the device.

Measuring limit

Resolution

 Accuracy (18 – 28°C)

9,999 Hz

0,001 Hz

± (1,0% + 3 dg.)

99,99 Hz

0,01 Hz

999,9 Hz

0,1 Hz

9,999 kHz

0,001 kHz

99,99 kHz

0,01 kHz

999,9 kHz

0,1 kHz

9,999 MHz

0,001 MHz

Input voltage measuring limit: 200 mV - 10V[AC]

Over-voltage protection: 600V DC/AC

DIODE- AND INTERRUPTION TESTING

Diode testing:

 connect the red probe cable to 

 socket, and the black 

one to the “COM” socket (the red probe is for “+” polarity). Set the dial to 

 position. Use the „SEL” pushbutton to select the diode testing (

) 

function. Connect the red probe cable to diode’s anode, and the black one to 

its cathode. The display will show the diode’s approximate forward voltage. If 

the connection is reversed, “OL” will appear in the display. 

Interruption testing:

 a Connect the red probe cable to the 

 socket, , 

and the black one to the “COM” socket (the red probe is for “+” polarity).  Set 

the dial to the     position. Use the „SEL” pushbutton to select interruption 

testing (

) function. Touch the circuit to be measured with the probe cable.  

If the circuit is connected to a power source, switch off the power source and 

discharge the capacitors before starting measurement. Short-circuits (less 

than 60 Ω) will be indicated by the built-in buzzer.

Function Meas. limit Resolution

Measuring environment

0-3 V

0,001 V

Measuring current: approx. 1mA, 

idle voltage: approx. 3,2 V, overload 

protection: 600V DC/AC

600 Ω

0,1 Ω

idle voltage approx. 1V, overload pro-

tection: 250V[DC] or 250V[AC] RMS

CAPACITY MEASUREMENT: 

(

)

Connect the red probe cable to the 

 socket, and the black one to the 

“COM” socket.  Set the dial to the   position. Connect the measurement 

probe to the circuit to be measured. If the capacitor to be measured is con-

nected to a circuit, switch off the power source and discharge the capacitors 

before starting measurement. Note:  Capacity measurement only works with 

automatic measurement range selection. When performing measurements 

please note that the larger the capacity (µF) being measured, the more time it 

takes for the multimeter to take an accurate measurement.

Measuring limit

Resolution

 Accuracy (18 – 28°C)

6 nF

0,001 nF

± (4,0 % + 30 dg).

60 nF

0,01 nF

± (4,0% + 3 dg.)

600 nF

0,1 nF

6 µF

1 nF

60 µF

10 nF

600 µF

100 nF

6 mF

1 µF

100 mF

0,01 mF

± (5,0% + 3 dg.)

Overload protection: 600 V DC/AC

RESISTANCE MEASUREMENT (Ω)

Connect the red probe cable to the 

 socket, and the black one to the 

“COM” socket. (The red probe cable is “+” polarity.) Set the dial to Ω position. 

If the resistor to be measured is connected to a circuit, switch off the power 

source and discharge the capacitors before starting measurement.

Measuring limit

Resolution

 Accuracy (18 – 28°C)

600 Ω

0,1 Ω

± (4,0% + 3 dg.)

6 kΩ

1 Ω

60 kΩ

10 Ω

600 kΩ

100 Ω

6 MΩ

1 kΩ

60 MΩ

10 kΩ

100 mF

0,01 mF

± (5,0% + 3 dg.)

Open circuit voltage: 

1 V

Over-voltage protection: 

600 V DC/AC

.

MEASUREMENT OF DUTY RATIO

Connect the red probe cable to the

 socket, and the black one to the 

“COM” socket. Set the dial to  „Hz%” function. Use the „Hz%” pushbutton to 

set the duty ratio (%) function. Connect the measuring wire to the circuit to be