ammeter clamps

universal clamp meter vorel 81801 allows you to make basic electrical measurements. for some measured values, the meter itself can select a range depending on the measurement result. the meter is equipped with test clamps that allow you to inductively measure alternating current in a single wire without having to disconnect the circuit or disconnect it from the power source. this method also allows measuring much higher currents than conventional electricity meters.

basic measurements:

• AC voltage measurement: ac 0-450 v
• DC voltage measurement: dc 0-600 v
• alternating current measurement: ac 0-400 a
• resistance measurement: r 0-200 kω
• diode test: if 1 ma, ur 1 v
• circuit continuity test: 0-100 ω

measurement accuracy:

example of determining the accuracy of an AC current measurement. calculations for the measurement result: 30 a

• The measurement accuracy of 81801 meters in this range is: ±(2.5% + 10), resolution 0.1 a
• formula for calculating measurement error: (measurement result x 2.5%) + 10 x resolution
• calculations: (30 x 2.5%) + 10 x 0.1 = 0.75 + 1 = 1.75 a

a result that takes into account the measurement error of 30 a = 30 ± 1.75 a*

• the result taking into account the measurement error, showing the measurement of alternating voltage: 235 v = 235 ± 5.82 v*
• the result, taking into account the measurement error, to show the DC voltage measurement: 12 v = 12 ± 3.144 v

For a table with resolution and accuracy of a given measurement, please refer to the user manual.

*the 81801 meter does not have a real rms measurement function, therefore the above result is consistent with the real situation only for the correct sine wave form.

built-in features:

• auto - automatic adjustment of the measurement range. when measuring unknown values ​​with a meter whose range can be changed manually by means of a button, measurements should be made sequentially from the largest range to the range that gives the most accurate result - otherwise there is a risk of damaging the device. however, with a multimeter with auto function, one measurement is enough and the meter automatically finds the optimal range. by default, the meter starts in auto mode
• data storage – storage of the currently measured value on the screen

additional information:

• LCD screen, maximum displayed result: 1999
• automatic switching of the diode test to the continuity test if the circuit resistance is less than 100ω (it is not possible to set the meter for diode test only)
• beep in continuity test for resistance below 30 ω
• the clamps open up to 25 mm and allow measuring a single wire max. diameter up to 19 mm
• design with overload protection
• measuring probes included
• low battery indicator
• power supply: two 1.5v (aaa) batteries

visual description:

attention!

current measurement with clamp meters is done only on one wire, one cable. attaching clamps to multi-core cable without disconnecting one wire will give a false result or zero current.