Which Multimeter...?
Discussion
If you've survived life so far without needing one you probably don't need anything fancy. Like buying a calculator you can end up with a lot of whistles and bells you never use (and may not even know how to effectively).
I would think your main requirements are for voltage measurement, and continuity/resistance checks. Any multimeter around the £10 mark will do these functions. Digital display is fine - and probably inevitable at this price point.
I would think your main requirements are for voltage measurement, and continuity/resistance checks. Any multimeter around the £10 mark will do these functions. Digital display is fine - and probably inevitable at this price point.
http://www.ebay.co.uk/itm/VC97-Accurate-DIGITAL-LC...
Cheap & cheerful, does everything you will EVER want it to do & then some, pretty reliable & robust too, I have used mine for about 5 years with NO issues at all.
Cheap & cheerful, does everything you will EVER want it to do & then some, pretty reliable & robust too, I have used mine for about 5 years with NO issues at all.
Bear in mind that a digital multimeter can mislead.
As an example, my RRC had a non running fuel pump. According to the MM there was at least 12v (full battery voltage) at all of the points tested incl the connection of the loom to the pump. 12v applied to the pump live & earth from a spare battery made the pump run normally.
So what was the problem?
A 12v test bulb connected to the loom end live terminal didn't come on. A pin pushed through the live wire just back from the connector put the bulb on. Stripping the connector revealed extensive corrosion to the wire & most of the strands had gone. So whilst 12v was present there wasn't enough being delivered due to the lack of conductor.
So make yourself up a test bulb while you're at it - bulb holder & a couple of lengths of wire will do it plus a couple of small crocodile clips.
As an example, my RRC had a non running fuel pump. According to the MM there was at least 12v (full battery voltage) at all of the points tested incl the connection of the loom to the pump. 12v applied to the pump live & earth from a spare battery made the pump run normally.
So what was the problem?
A 12v test bulb connected to the loom end live terminal didn't come on. A pin pushed through the live wire just back from the connector put the bulb on. Stripping the connector revealed extensive corrosion to the wire & most of the strands had gone. So whilst 12v was present there wasn't enough being delivered due to the lack of conductor.
So make yourself up a test bulb while you're at it - bulb holder & a couple of lengths of wire will do it plus a couple of small crocodile clips.
Edited by paintman on Friday 19th February 20:54
paintman said:
Bear in mind that a digital multimeter can mislead.
As an example, my RRC had a non running fuel pump. According to the MM there was at least 12v (full battery voltage) at all of the points tested incl the connection of the loom to the pump. 12v applied to the pump live & earth from a spare battery made the pump run normally.
So what was the problem?
A 12v test bulb connected to the loom end live terminal didn't come on. A pin pushed through the live wire just back from the connector put the bulb on. Stripping the connector revealed extensive corrosion to the wire & most of the strands had gone. So whilst 12v was present there wasn't enough being delivered due to the lack of conductor.
So make yourself up a test bulb while you're at it - bulb holder & a couple of lengths of wire will do it plus a couple of small crocodile clips.
You should always test voltage with the load connected. Only with the load connected will you get current flow. Without current flow you will not see the voltage drop. You can get 12v through a wet finger but not enough current to run anything. As an example, my RRC had a non running fuel pump. According to the MM there was at least 12v (full battery voltage) at all of the points tested incl the connection of the loom to the pump. 12v applied to the pump live & earth from a spare battery made the pump run normally.
So what was the problem?
A 12v test bulb connected to the loom end live terminal didn't come on. A pin pushed through the live wire just back from the connector put the bulb on. Stripping the connector revealed extensive corrosion to the wire & most of the strands had gone. So whilst 12v was present there wasn't enough being delivered due to the lack of conductor.
So make yourself up a test bulb while you're at it - bulb holder & a couple of lengths of wire will do it plus a couple of small crocodile clips.
Edited by paintman on Friday 19th February 20:54
Something a lot don't understand. The MM says 12 volts so the fault must be elsewhere.
My most useful car electrics tools are a couple of long lengths of wire with a small crocodile clip at each end, a pin & a test bulb! (I owned a Scimitar in the early 80s & due to the GRP body everything is earth by wire!)
My most useful car electrics tools are a couple of long lengths of wire with a small crocodile clip at each end, a pin & a test bulb! (I owned a Scimitar in the early 80s & due to the GRP body everything is earth by wire!)
Gassing Station | Home Mechanics | Top of Page | What's New | My Stuff



