Toya Vorel 81801 Manual De Instrucciones página 17

GB
Accuracy: ± (% of indication + weight of the least signifi cant digit)
Measurement of DC voltage: 1.396 V
Accuracy: ±(0.8% +5)
Calculation of error: 1.396 x 0.8% + 5 x 0.001 = 0.011168 + 0.005 = 0.016168
Measurement result: 1.396 V ± 0.016 V
Voltage measurement
Connect the test leads to the jacks marked "VΩ" and "COM". Set the range switch to the DC or AC
voltage measurement position. Connect the test leads in parallel to an electrical circuit and read the
resultant voltage. Never measure a voltage which is higher than the maximum measuring range.
This can damage the meter and cause electric shock.
Measurement of AC current using a clamp
Use the selector to set the appropriate measuring range. Open the measuring clamp by pressing
the lever. Place a single wire through which alternating current is fl owing within the clamp and close
it. Make sure that the jaws of the clamps adhere exactly to each other. For the most accurate meas-
urement it is necessary to make sure that the cable is held centrally between the jaws. The error due
to the non-central location of the wire is 1% of the measured value, but it can be avoided by placing
the wire centrally inside the jaws. Read the result. Do not touch exposed conductive surfaces during
measurement. This may cause electric shock.
Resistance measurement
Connect the test leads to the jacks marked "VΩ" and "COM" and set the range switch to the re-
sistance measurement position. Touch the probes to the terminals of the measured element and
read the measurement result. In order to obtain more accurate measurement results, change the
measuring range if necessary. It is absolutely forbidden to measure the resistance of elements
through which electric current is fl owing. For measurements greater than 1 MΩ, the measure-
ment may take a few seconds before the readout becomes stable, which is the normal response for
high resistance measurements.
Before touching the probes to the terminals of the workpiece, an overload symbol is shown on
the display.
Diode test
Connect the test leads to the jacks marked "VΩ" and "COM" and set the knob to the LED symbol.
The probes are now touched to the diode terminals: once in the forward and then in the reverse
direction. If the diode is working, it will show a voltage drop in its forward direction expressed in mV.
If connected in the reverse direction, the display will show the overload symbol. Working diodes
are characterized by a low resistance in the forward direction and a high resistance in the reverse
direction. It is absolutely forbidden to test diodes through which electric current is fl owing.
Conduction t est
O R I G I N A L I N S T R U C T I O N S
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