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How to integrate a voltage meter in a circuit?

What am I doing wrong that the 15v voltage meter that I'm installing on my power supply would peg out with 1.2v on the output?

I have a Jameco 20626 (JE215) Adjustable Dual Power Supply Kit that I've pu t together. I want to put two Jameco 2162863 15vdc power meters on the out puts when I finish enclosing the device. When I have connected one of thes e meters over either the negative or positive outputs, the meter pegs out o n 1.2vdc.

I'm working under the understanding that I should be able to just install t he meters in parallel with the load to observe the output voltage. I'm uns ure where I'm going wrong because I have limited experience and no datashee t on the voltage meter.

Thanks for your help!

Here is a link to the Jameco 20626 instruction manual with the circuit sche matic.

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.pdf

Reply to
Jason Pirok
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Use a known voltmeter to monitor the output of your power supply before hooking up the 15v meter. Perhaps your power supply is not performing properly...

Otherwise check that there was supposed to be a series dropping resistor with the 15v meter, not that I could see anything about that on either the Velleman or Jameco sites, so the meter should read properly. you could always hook the meter to a 1.5V battery or 9V battery to see if it is correct. It may be defective of course...

John :-#)#

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Reply to
John Robertson

my power supply would peg out with 1.2v on the output?

e put together. I want to put two Jameco 2162863 15vdc power meters on the outputs when I finish enclosing the device. When I have connected one of these meters over either the negative or positive outputs, the meter pegs o ut on 1.2vdc.

ll the meters in parallel with the load to observe the output voltage. I'm unsure where I'm going wrong because I have limited experience and no data sheet on the voltage meter.

schematic.

%203..pdf

Thanks for the reply!

I found simpson panel meter data sheets on mouser.com. They suggested 1k p er volt measured for those products, so.... I'll try a 15k ohm resistor to night when I get home.

Thanks again!

Reply to
Jason Pirok

No problemo! Send a note to Edmonds if the series resistor is needed. They don't say anything about that on their listing for the 15V meters that I could easily find.

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup) 
John's  Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) 
                      www.flippers.com 
        "Old pinballers never die, they just flip out."
Reply to
John Robertson

I meant JAMECO, not Edmonds - was on another topic about lens replacement and got the names mixed up!

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup) 
John's  Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) 
                      www.flippers.com 
        "Old pinballers never die, they just flip out."
Reply to
John Robertson

I just got home and tested the theory out. I put a 15k resistor in series with the meter and it works great! Guess I'll write to Edmonds, I mean Jameco ;) about that detail.

Thanks for your help John!

Reply to
Jason Pirok

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