M210 datasheet(4/4 Pages) ETC

4 / 4 page

RHOPOINT

INSTRUMENTATION LTD

RHOPOINT INSTRUMENTATION LTD

Beeching Road, Bexhill-on-sea

East Sussex,TN39 3LG

email: instrumentation@rhopoint,co,uk

2. Testing the resistance of

windings to determine

continuity, good electrical

connection to tails, and to

ascertain resistive imbalance

in centre-tapped transformers.

6. Testing ring mains circuits

to meet Appx. 15 1 EE wiring

regulations. The resistance in

the ring, including the

resistance of the protective

conductor are checked

before and after connection.

1. Checking continuity value

and mechanical stability of

resistive components. Also

used to measure resistance/

temperature coefficient . R2

- R, X 100 R, (t2- tl)

3. Checking the electrome-

chanical stability of printed

circuits and mounted

components. Dry solder joints

can be located by connecting

one clip to the track, the other

clip to the component tail or tag.

4. Ensuring that earth points

make good electrical contact

to earthing strip or chassis.

Looking for defects due to

rust, corrosion or defective

plating and anodic films.

5. Plugs and sockets of all

types rely on friction contact

between mating surfaces.

Looking for defects due to

oxydisation, grease or dirt.

7. Multi-tapped transformers

are quickly checked and the

tapping points identified on

an unknown transformer or

coil assembly.

8. Etching defects show up

as an unexpected variation

in track resistance.

9. Through hole plated tracks

on a P C B are checked for

continuity and unexpectedly

high resistance.

10. Clipping the leads to the

probes makes for an

easy-to-use continuity tester

which is accurate.

11. Welded joints which are

imperfect have a high

resistance. Aluminium welds

over 0.7 ohms are rejected.

Small variations in resistance

may indicate inclusions or

voids in the weld.

Test procedures

Using standard lead set for dhecking

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