The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Correct rotation, wrong sequence
by Potseal
Yesterday at 03:14 PM
Industrail Control Panel bonding per 409.108
by sparkyinak
12/09/16 06:29 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 11
HotLine1 10
Potseal 9
sparkyinak 8
Texas_Ranger 7
Who's Online
0 registered (), 224 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#161732 - 04/07/07 03:55 AM Sperry multimeter non true rms
Frank Cinker Offline
Member

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
I just purchased a nice little Sperry DSA-500 multimeter at Home Depot for $49.00. It seems to work just fine. However, it is not a true rms multimeter. Will it still measure voltage accurately?

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#161790 - 04/07/07 05:16 PM Re: Sperry multimeter non true rms [Re: Frank Cinker]
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
Depends on what sort of accuracy you require.
Any non-TrueRMS meter will test the Average voltage (as in 63.7% of the peak voltage) as opposed to 70.7% (RMS).
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin

Top
#161838 - 04/08/07 03:31 AM Re: Sperry multimeter non true rms [Re: Trumpy]
Frank Cinker Offline
Member

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
I just need it to test voltage drop at the outlet, neutral-ground voltage etc.

Top
#161840 - 04/08/07 03:40 AM Re: Sperry multimeter non true rms [Re: Frank Cinker]
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
By rights, there should be no voltage between these conductors.
I could be wrong too.
Frank,
A T-RMS meter is only of value to those that measure voltages with lots of harmonics on the supply.
The average electrician doesn't need to worry , I have one, but I wouldn't recommend every guy runs out and gets one.
My Fluke 80 does just as gooder job and why spend good cash when you don't have to?.


Edited by Trumpy (04/08/07 03:49 AM)
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals