Instructions for use

Using standard clip leads M210/9A

(Supplied as Standard)

1. Plug either black plug into either black socket in the top of

the instrument and red plugs into red sockets.

2. Clip leads to circuit or component to be tested. Ensure that

both faces of clip make good electrical contact.

3. Press the ON button to read resistance.

1. Insert plugs into their respective sockets as illustrated.

The outer plugs form the current circuit via the clips.The inner

plugs (with yellow bands) connect the probes in the voltage

measuring circuit.

2. Clip leads to circuit under tester.

3. Press ON button to read resistance when probes are in

contact with the circuit.

Using probe and contact connectors

clip leads M210/9B

(Optional Extras)

Interpreting the display

1. The Milli-ohmeter will read directly in ohms or milli-ohms.

2. Fluctuating readings displayed. Check that the clips are

making good contact with the circuit under test, then look for

the cause of intermittency, e.g. dry solder joint, oxydised

or corroded terminals; slight mechanical movement of the

component(s) in the circuit under test should quickly reveal

the source of the problem.

3. Flashing “1” indicates that resistance in circuit exceeds

Slide down the cover at the rear, bottom of the instrument.

Fit new battery 9 volt pp3 (MN1604 or equivalent). Replace

cover.

Battery Replacement

200 ohms.

4. “LO-BAT” displayed indicates low battery.

The ratio between the current and the voltage drop is calculated by the instrument using Ohm’s law (R=E/I) to display the result

in ohms.

Four clips would normally be required for connection but this could be tedious so a form of clip is used with the Milli-ohmeter.

The jaws are moulded in robust plastic and inset into each jaw face is a copper / silver inlay contact; these are insulated from

each other by the plastic mouldings. One contact face on each clip is connected to the current-generating circuit, the other face

is connected to the voltage-measuring circuit. In this way four wires are connected instantly by two clips. The resistance of the

connecting wires plays no part in the measuring so no “backing-off” is required as would be the case if a multi-meter were to be

used for the same measurment.