CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
November 26, 2014, 03:27:12 PM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
106611 Posts in 12428 Topics by 4790 Members
Latest Member: gmein
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  Restoration
| | |-+  amp gauge
« previous next »
Pages: [1] Print
Author Topic: amp gauge  (Read 949 times)
69RSZEE28
Newbie
*
Posts: 11



View Profile
« on: December 17, 2013, 10:55:14 PM »

How do I test the amp gauge for 69 out of the car?
Logged
69Z28-RS
Hero Member
*****
Posts: 2488


owner since '76


View Profile Email
« Reply #1 on: December 18, 2013, 08:47:48 AM »

From what's been said, it seems a very small dc voltage would engage it.   (a 1.5 vdc battery with a pot across it to allow adjusting the pot output from 0Vdc toa few millivolts?)..  (D'Arsonval movements are very sensitive to very small voltages)
Logged

Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
Ed Bertrand
CRG Member
*****
Posts: 2333


View Profile
« Reply #2 on: December 18, 2013, 10:17:18 AM »

To test the amp gauge connect a partially dead AA battery (+ on pin 3 and - on pin 4), it should register 40 amps charge (depending on condition of battery), reverse the AA battery and it should register 40 amps discharge. I got one of these at Radio Shack for a few bucks just for this purpose (see below).

I recommend you don't use a new battery since it'll be 1.5VDC. The one I have I got out of my Cable TV remote when it wouldn't work anymore! It read just under 1 volt. Also, don't leave it attached for too long. Just long enough to see the needle deflect both ways.

Ed
« Last Edit: December 18, 2013, 01:44:15 PM by Ed Bertrand » Logged
Mark
CRG Member
*****
Posts: 944



View Profile Email
« Reply #3 on: December 18, 2013, 01:23:46 PM »

Be carefull, full scale deflection on the gauge is about 0.5V (0.5V will make it read full scale one way or the other)  Don't try it with 1 12V source unless you like buying new things.
Logged

Mark C.
1969 Indy Pace Car
350/300HP RPO Z11
69Z28-RS
Hero Member
*****
Posts: 2488


owner since '76


View Profile Email
« Reply #4 on: December 18, 2013, 03:24:55 PM »

If you hook a potentiometer across a 1.5 V battery, and adjust the pot to the LOW end, you will be at 0 volts.. and the ammeter across from the low side of the battery to the mid point, then you can slowly adjust the voltage on the ammeter until you read full deflection (and you could then measure that voltage with a meter)...   and by flipping the battery leads, you can check deflection in the opposite direction.
Logged

Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
Pages: [1] Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.081 seconds with 18 queries.