I need to measure current using a multimeter in series with a resistance decade box to calibrate a test fixture and am struggling, is there any guidance on how to acheive this? I purchased the farnell part 72-7270 to acheive this

Give us some more information !

What sort of test fixture, what range of currents, what multi meter.

Have you any photos of the test fixture.

In essence the answer is simple (connect meter on current range in series with a power supply, resistance box and test fixture, wiggle the resistance to set the test current on the multi-meter - job done).

In practice it might all be rather different - can the resistance box stand the test current, does the test fixture provide the power supply (if so - how many volts) etc etc.

So to give you sensible advice I'd need to know some more.

MK

The specific instruction is below, I have a basic multimeter with the ampere function Velleman DV853, the fixture has a calibration panel which has 4mm red and black Load sockets. Test fixture is 24 volt supply

I can't find any reference to a Velleman DV853 meter on the web - are you sure about that number ?

Turn ON the 400 and the 200 switches on the resistance box - DO THIS FIRST.

Set the meter to measure current in the range 0 - 200mA (or as close as you can get.)

Connect the black terminal of the resistance box to one terminal (doesn't matter which) of the test thing.

Connect the red terminal of the test box to the red terminal of the meter.

Connect the back terminal of the meter to the free terminal of the test thing.

The meter should read a current higher than 16mA, report back if not.

Add resistance (by switching in extra resistors of value less than 100 ohms) until the meter reads between 15.8 and 16.2 mA - you'll need a bit of trial and error on this.

Don't get carried away and switch off the 400 or 200 !!

When you get to the right current do what the instructions say.

Take a photo and post it  - we need contact with the outside world during knockdown !!

MK

They have a DVM853: https://www.velleman.eu/products/view/?id=439012

Image source: link above

Thanks Jan,

Advice would work - it has 200mA range.

On a reading of 16mA the error will be about +/- 0.52mA so my suggestion of setting within 0.2mA will be OK (just) since the actual current will be within +/0 0.72mA.

MK

Success thank you your help was much appreciated.

Success thank you your help was much appreciated.

Thanks for the picture - pleased to hear that it all worked.

MK