somogyi SMA 2101 Electronic AC-DC Clamp Instruction Manual

SMA 2101 Electronic AC-DC Clamp
Instruction Manual

SMA 2101 Electronic AC-DC Clamp

Front panel

1. current measuring clamp
2. clamp meter illumination
3. front panel
4. clamp release lever
5. function selector
6. min/max value
7. relative value/Automatic power off
8. liquid crystal display
9. negative input socket
10. positive input socket| 11. frequency/duty factor
12. save reading/backlight button
13. selector knob
14. off position
15. current direction (+)
16. current direction (-)
17. rear panel
18. battery compartment fixing screw
19. battery compartment
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This clamp meter was designed with a view to complying with the safety requirements of standard IEC 61010-1. Complies with the 600V CAT III measurement category and Category 2 contamination requirements. Before using this measuring instrument, please read this instruction manual and observe the relevant safety precautions. CAT III: Measurements inside buildings or plants. For example, fixed equipment, distribution panel, cabling, bus bars, switches, surge protection distribution box, etc. CAT II: Measurements on circuits that are directly connected to low voltage circuits. For example, measurements on household appliances, portable devices and similar equipment. CAT I: Measurements on electric circuits that are not directly connected to mains.
Warning! These operating instructions contain the information and warnings required for the safe use and maintenance of the unit. Read and understand the instructions for use before using the device. Failure to understand the instructions or observe the warnings can result in serious personal injury or property damage. For your safety, please use the probe cable included with the clamp meter. Before use, please check that yourmultimeter is intact and serviceable.

Safety Markings

| Important warning.
Read the contents of the instruction manual.
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| Alternating current
| Direct current
| Grounding
****| Double grounding (Contact protection class II)

Maintenance

Do not attempt to remove the clamp meter’s outer casing. Before opening the battery compartment lid, always unplug the probe cables from the circuit and the clamp meter.  The removal of the clamp meter’s case as well as its calibration, maintenance and servicing should only be performed by a specialist who is completely familiar with the operation of the clamp meter and the shock hazard involved. If not planning to use the clamp meter for an extended period of time, please remove the battery and avoid storing the unit in excessively warm or humid environments. Do not use any abrasives or solvents on the device. Only use a  damp cloth or mild detergent for cleaning the unit.

During Use

• If the unit is used near strong electromagnetic interference, please note that the measuring instrument’s operation can become unstable or it may indicate malfunction.
• Never exceed the safety limits specified in the instructions for each measurement range.
• Never use the unit without its rear panel fully attached.
• Remove from circuit and discharge the high voltage capacitors before measuring resistance or interruption.
• Be very careful when working with bare cables or bus bars.
• If any irregular operation is detected on the clamp meter, immediately switch it off and have it serviced.
• If the value to be measured is unknown, check the highest possible measurement range on the multimeter, or whenever possible, select the automatic measurement range mode.
• Before turning the selector dial, disconnect the probe cable from the measurement circuit.
• Never perform resistance or interruption measurements on energized circuits.
• When performing measurements on TV sets or circuits with high AC, always remember that there might be high amplitude voltage on the test points, which can damage the multimeter.
• If the voltage to be tested exceeds the effective value of 60 V DC or 30 V AC, work carefully in order to avoid sustaining an electric shock.
• If the battery symbol appears on the display, the battery must be replaced immediately. Low battery voltage may result in measurement errors, electric shock, or even injury.
• Keep your fingers away from the connecting sockets.
• Do not use the clamp meter in the presence of flammable gas, vapors or dust.
• Before each use, check the unit in order to ensure proper operation (e.g., using a known voltage source).
• When measuring CAT III voltage, the voltage may not exceed 600 V.

General description
This AC/DC clamp meter features a 4 digit, 7-segment display.
It can be used to measure direct current, alternating current, DC voltage, AC voltage, resistance, frequency, capacity, duty factor, diodes, and interruption. The minimum and maximum measured reading can be saved. Capable of performing relative measurements, has background illumination, and automatically or manually switches measurement ranges. The reading can be saved on the display. Switches off automatically.

Display symbols

Pushbuttons

SEL
If more than one secondary function is available at any given dial setting, this pushbutton can be used to toggle them. Each push of the button shifts to the next function.
MIN/MAX
Minimum/maximum value. When minimum value is set, the clamp meter saves the measured minimum figure while at maximum setting it saves the maximum figure. Each push of the button shifts to the next function. Keep ing the button pressed for approx. 2 seconds will cause the clamp meter to leave the MIN/MAX function.
REL
Relative value. The current reading is stored at the moment the button is pressed, the “REL” symbol appears on the display and the display is cleared. Afterwards, the reading  appearing on the display will be of a value relative to the previous one. Pressing the button again or changing functions will cause the instrument to clear the relative reading.  Keeping the button pressed for approx. 2 seconds turns off/ activates the automatic power off function.
B.L/HOLD
Pressing this button will store the measured reading on the display. Pressing the button again or changing functions will cause the instrument to clear the data. Keeping the  button pressed for approx. 2 seconds turns off the display backlight and the clamp meter’s illumination for approx. 30 seconds.
Hz/Duty
Frequency/duty factor measurement toggle button.
Each push of the button shifts to the next function.

Input sockets
COM common input socket for all quantities to be measured (negative)
INPUT Common input socket for all quantities to be measured (positive)
Accuracy
Accuracy is ensured for one year after calibration, at an operating temperature of 18 °C–28 °C and a relative humidity of 0%–75%.

FEATURES

Automatic power off
In order to conserve power, the multimeter automatically switches off after approx. 15 minutes if no measurement is performed or function is changed. This is indicated by 5  short beeps 1 minute before switching off then the unit switches into sleep mode with a beep. Pressing any button will wake up the clamp meter.
DC voltage measurement ( V)
Connect the red probe cable to the “INPUT” socket, and the black one to the “COM” socket. Set the dial to the DC voltage position. Connect the measurement probes to  the circuit to be measured.
Note: The reading can be unstable, especially in the 400mV measurement range, if the probe cable is not connected to the circuit being measured. If the measured figure is  more than 600 V, the “OL” symbol will appear on the LCD display, and the built-in buzzer will emit a beep.

Input impedance: 10 MΩ, Maximum input voltage: 600 V DC
DC measurement ( A)
Warning! Before performing a measurement, unplug the probe cables from the unit. Set the dial to the desired measurement range. Use the “SEL” pushbutton to set the  direct current (DC) function. Clear the display by pressing the “REL” pushbutton.
Open the clamp, place it around the cable then close it. The measured figure can be read off the display.
Note: Only measure one conductor at a time. For optimum results, center the conductor in the clamp meter.

Max input current: 400A DC
Measurement of AC voltage (~V)
Connect the red probe cable to the “INPUT” socket, and the black one to the “COM” socket. Set the dial to the AC voltage position. Connect the measurement probes to  the circuit to be measured.
Note: If the measured figure is more than 600 V RMS AC, the “OL” symbol will appear on the LCD display, and the built-in buzzer will emit a beep.

Input impedance: 10 MΩ
Maximum input voltage: 600 V DC or 600 V AC RMS
Measuring range: 40 Hz- 400 Hz

Measurement of AC current (A )
Warning! Before performing a measurement, unplug the probe cables from the unit. Set the dial to the desired measurement range. Use the “SEL” pushbutton to set the  alternating current (AC) function. If the displayed figure is unstable, clear the display by pressing the “REL” pushbutton. Open the clamp, place it around the cable then close  it. The measured figure can be read off the display.
Note: Only measure one conductor at a time. For optimum results, center the conductor in the clamp meter.

Max input current: 400 A AC
Measuring range: 40 – 400 Hz

Frequency measurement (Hz)
In the frequency measurement function: Connect the red probe cable to the “INPUT” socket, and the black one to the “COM” socket. Set the dial to the frequency  measurement function (HZ%). Use the “Hz%” button to set the frequency measurement function (Hz). Connect the measurement probes to the circuit to be measured.
Note: Do not exceed the input voltage, as this will damage the instrument.

When measuring AC:
Warning! Before performing a measurement, unplug the probe cables from the unit.
Set the dial to the desired measurement range (40 A , 400 A ). Use the “SEL” pushbutton to set the alternating current (AC) function. Use the “Hz%” button to set the  frequency measurement function (Hz). Open the clamp, place it around the cable then close it.

When measuring AC voltage:
Connect the red probe cable to the “INPUT” socket, and the black one to the “COM” socket. Set the dial to the AC voltage position (~V). Use the “Hz%” button to set the  duty factor function (%). Connect the measurement probes to the circuit to be measured.
Note: If the duty factor is less than 10%, the “UL” symbol will appear on the LCD display. If it is greater than 94,9%, the “UL” symbol will appear on the LCD display.
Measurement limit: 10 Hz-10 KHz
Input voltage: ≥ 1 V AC RMS
Input impedance: 10 MΩ
Maximum input voltage: 600 V AC RMS

Diode and interruption testing
Diode testing: Connect the red probe cable to the “INPUT” socket, and the black one to the “COM” socket (the red probe is “+” polarity).
Set the dial to the position. Use the “SEL”  pushbutton to set 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: Connect the red probe cable to the “INPUT” socket, and the black one to the “COM” socket (the red probe is “+” polarity). Set the dial to the position.
Use the “SEL” pushbutton to set the interruption testing ( ) function. Connect the measurement probe to the circuit to be tested. If the circuit is connected to a power  source, switch of the power source and discharge the capacitors before starting measurement. Short-circuits (less than 40 Ω) will be indicated by the built-in buzzer.
Note: If the measured value is more than 400 Ω, the “OL” symbol will appear on the display.

Idle voltage: approx. 3.3 V
| Under 40 0 the built- in buzzer will beep wile  over 400 0 the ‘ OL” symbol will appear on the display| Idle voltage: approx. 1.2 V

Overload protection: 250 V DC or 250 V AC RMS.
Capacity measurement ( )
Connect the red probe cable to the “INPUT” socket, and the black one to the “COM” socket. Set the dial to the position.
Use the “SEL” pushbutton to set the capacity measurement ( ) function. Connect the measurement probe to the circuit to be measured. If the capacitor to be measured is  connected to a circuit, switch of the power source and discharge the capacitors before starting measurement.
Note: Measurement might take a while when measuring high capacities (approx. 30 seconds in the 400 µF and 4000 µF range). Press the “REL” button (clear the display)  when measuring capacities lower than 20nF.

Overload protection: 250V DC or 250V AC RMS
Resistance measurement (Ω)
Connect the red probe cable to the “INPUT” socket, and the black one to the “COM” socket (the red probe is “+” polarity). Set the dial to the position. Use the “SEL”  pushbutton to set the resistance measurement (Ω) function. If the resistor to be measured is connected to a circuit, switch of the power source and discharge the capacitors  before starting measurement.
Note: When measuring resistances over 1 MΩ the instrument needs a few seconds to obtain an accurate reading.

Open circuit voltage: 0.4V
Over-voltage protection: 250V DC or 250V AC RMS

Battery and fuse replacement
If the “ ” icon appears on the display, the batteries require replacing. Prior top replacing the battery, turn off the instrument and unplug the probe cables. Remove the  screw from the rear panel. Replace the batteries. Observe the correct polarity.
Replace the cover and tighten the screw.
Warning:
Before opening the instrument, make sure that the probe cables have been removed from the measuring circuit. Replace and tighten the screws so that the device operates in  a stable manner during use and accident hazards are avoided.
Accessories:

• Instructions for Use
• probe cable
• 9 V (6F22) battery
• box

DISPOSAL
Waste equipment must be collected and disposed separately from household waste because it may contain components hazardous to the environment or health. Used or  waste equipment may be dropped off free of charge at the point of sale, or at any distributor which sells equipment of identical nature and function. Dispose of product at a  facility specializing in the collection of electronic waste. By doing so, you will protect the environment as well as the health of others and yourself.
If you have any questions, contact the local waste management organization. We shall undertake the tasks pertinent to the manufacturer as prescribed in the relevant regulations and shall bear any associated costs arising.
DISPOSING OFALKALINEAND RECHARGEABLE BATTERIES
Batteries, whether alkaline or rechargeable, must not be handled together with regular household waste. It is the legal obligation of the product’s user to dispose of batteries at  a nearby collection center or at a retail shop.
This ensures that the batteries are ultimately neutralized in an environment- friendly way.

SPECIFICATIONS

• measurement category:
  CAT III 600V and Category 2 contamination

• ambient temperature and humidity:
  0 – 40 °C (<80% relative humidity)

• operating altitude:
  <2000 m

• storage temperature and humidity:
  -10 – 50 °C (<70% RH and remove the battery)

• maximum allowed voltage between the measurement device and ground:
  600 V DC or 600 V AC RMS

• display:
  4 digit LCD display

• sampling frequency:
  On 7-segment display: approx. 3/sec.

• On graphic display: approx. 30/sec.

• power supply:
  3 x 1.5 V (AAA)

• reading over measurement limit:
  “OL” appears in the display window.

• polarity indication: “-” is displayed for negative polarity.

• exhausted battery: “ ” icon appears on the display.

• dimensions: 208 mm x 78 mm x 35 mm

• weight: approx. 340 g (including battery)

References

• Zed d.o.o.

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