Amprobe MO-100 Посібник користувача - Сторінка 8

Переглянути онлайн або завантажити pdf Посібник користувача для Вимірювальні прилади Amprobe MO-100. Amprobe MO-100 18 сторінок. Milliohm meter

INTRODUCTION

• The Milliohm Meter is a battery operated instrument wich supply

a low current to the circuit under test, with which, stable, accurate

measurement of low resistance can be made, still, over a wide range of

values.

• Resolution on the lowest range is 100μ ohm and on the highest range,

1 ohm.

• The meter has 5 measuring ranges, from 200.0 milli-ohm to 2000 ohms

• Measurements are displayed on a 3½ digit custom liquid crystal display

with large digits.

• This instrument is powered from batteries only (alkaline or rechargeable

equivalent).

• It has a regulated DC constant current source with current of 1mA 10mA

and 100mA.

• The instrument supply that current to the resistance being measured

through the C1 and C2 terminals (C1 being +, C2 being -).

• The voltage drop across the resistance under test is measured by the

potential terminals P1 and P2 (P1 being +, P2 being -).

• Should the current regulation drops out, the Rc LED will lit, indicating

that the resistance in the current circuit is too high. (Lowering the

current by selecting a higher resistance range can solve the regulation.)

• Should the Rp LED lit, that mean that the voltage measured on the

resistance is too high, and therefore over-range.

• The resistance is measured precisely when the RP and RC LEDs do not lit.

If anyone of these leds lit, then the measurement can be inaccurate.

• The meter has a built-in custom 3½ digit liquid crystal display can

be viewed in most lightning conditions. This display indicates the

differences conditions (Hold, m, buzzer, polarity condition of load, + or -,

automatic decimal point change).

• The instrument takes measurements for 10 seconds if the "ON" "TEST

Re button is depressed for less than 2 seconds. If the same push button is

pressed for more than 3 seconds, the test will carry on for 60 seconds.

• The tester switch "OFF" completely when the rotary switch is in the

"OFF" position.

• The tester "Hold" the last reading before stopping the test.

• The tester is fuse protected and has a crowbar between C1 and C2.