Aktakom ATK-2040 Руководство пользователя - Страница 5
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This is used to select the function user desired, such as DCA, ACA, DCV, ACV, Hz, Ohm and Continuity.
4. Data Hold Button
Once this button is pushed, reading shall be held on the LCD. Press again to release it. This button is also used to
recover from auto-power-off. Press this button to turn the power back on after auto-power-off.
5. Max/Min Hold Button
This button is used to enable the maximum or minimum value to be displayed and updated during measurement.
Press once, minimum value shall be displayed and updated. Press again, maximum value shall be displayed and
updated. The Zero/Relative function will be disabled if Max/Min function is enabled. This button is not available in Hz
function.
6. Zero/Relative Button
Once this button is pressed, the current reading shall be set to zero and be used as a zero reference value for all other
subsequent measurement.
The function is also used to remove offset value caused by the residual magetism
remained in the core for the DC current measurement. The Zero/Relative function will be disabled if the MAX/MIN
button is pressed. This button is not available in Hz function.
7. LCD
This is a 3 3/4 digit Liquid Crystal Display with maximum indication of 3999. Function symbols, units, bargraph, sign,
decimal points, low battery symbols, max/min symbols, and zero symbol are included.
8. Low Battery Symbol
When this symbol appears, it means the battery voltage drops below the minimum required voltage. Refer to Section V
for battery replacement.
9. Zero/Relative Symbol
When this symbol appears, it means a reference value has been subtracted from the actual reading. The reading
shown is a offseted value. Press the zero button again to return to normal mode.
10. Data Hold Symbol
Once the hold button is pressed, this symbol appears on LCD.
11. Bargraph
Bargraph has forty segments. It displays segments proportional to the actual reading. Each segment represent one
count.
12. Max/Min Hold Symbol
Once the max/min button is pressed, either MAX or MIN shall be displayed on LCD
13. Continuity Symbol
If ohm and continuity function is selected, this symbol shall appears on LCD.
14. Units Symbols
Once a function is selected, corresponding unit (V, Ω , A, or Hz) shall be displayed on LCD.
15. V/Hz Input Terminal
This terminal is used as input for voltage, or frequency measurements.
16. COM Terminal
This terminal is used as common reference input.
17. Hand Strap
Put your hand through the hole of hand strap to avoid accidental drop of the clamp meter.
III. Operation Instructions
A. DC/AC Current Measurements
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