TESTBOY TB 4000 Bedienungsanleitung Seite 19

Explanation of switches, buttons and jacks
®
Testboy TB 4000
(1) Hz/%
For switching between frequency measure-
ment and duty cycle
(2) SEL/BT button
Pressing the button switches the active
measurement function, e.g. from DC to AC.
Pressing and holding down the button
(de)activates Bluetooth.
(3) MAX/MIN
Depending on the function, pressing this
displays the maximum value or the mini-
mum value of the measurement.
(4) Input jack V/Ω
Red test lead for all types of signals sup-
ported by the instrument.
(5) Earth jack COM
Black test lead for all types of signals sup-
ported by the instrument.
(6) µA/mA jack
For current measurements up to 600 mA.
(7) 10 A jack
The 10 A jack must be used for current
measurements above 600 mA.
(8) ON/OFF switch / measurement func-
tion selection switch
Switches the instrument on. The measure-
ment function is selected depending on the
switch position.
(9) RAN
Pressing this button selects the measure-
ment range manually.
(10) Hold/BL
Pressing this button saves the reading on
the display. Pressing and holding down the
button switches on the display lighting.
(11) REL/APO
Pressing this button activates relative meas-
urement. Pressing and holding down the
button switches the Auto Power Off function
on and off.
(12) Display
Displays the readings.
Operation
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