Wattmeter terminal ID

6/17/2007 11:52:44 PMplanigan

I have a Hickok Model 47 Wattmeter with limits 150V 3 Amp (meter face 300Watts) that I want to test. I have opened the meter and identified the "common" terminal and now have to figure out which of the two remaining terminals are volts and which is amps. When I had the meter open I noted that one of the remaining terminals was connected to the coil at the meter movement while the other seems to be connected to a flat coil that goes across the meter above the movement. Any ideas on how to check it with an ohm meter and if so, whats the procedure? PL

6/18/2007 4:13:04 AMJohnnysan

: I have a Hickok Model 47 Wattmeter with limits 150V 3 Amp (meter face 300Watts) that I want to test. I have opened the meter and identified the "common" terminal and now have to figure out which of the two remaining terminals are volts and which is amps. When I had the meter open I noted that one of the remaining terminals was connected to the coil at the meter movement while the other seems to be connected to a flat coil that goes across the meter above the movement. Any ideas on how to check it with an ohm meter and if so, whats the procedure? PL

The shunt coil across the meter movement is the ammeter connection--the load goes in series with this.

6/18/2007 10:18:50 AMLewis Linson

:: I have a Hickok Model 47 Wattmeter with limits 150V 3 Amp (meter face 300Watts) that I want to test. I have opened the meter and identified the "common" terminal and now have to figure out which of the two remaining terminals are volts and which is amps. When I had the meter open I noted that one of the remaining terminals was connected to the coil at the meter movement while the other seems to be connected to a flat coil that goes across the meter above the movement. Any ideas on how to check it with an ohm meter and if so, whats the procedure? PL
:
:The shunt coil across the meter movement is the ammeter connection--the load goes in series with this.

The Volts has high resistance, the Amps is low.
Lewis

6/18/2007 11:48:52 AMplanigan

::: I have a Hickok Model 47 Wattmeter with limits 150V 3 Amp (meter face 300Watts) that I want to test. I have opened the meter and identified the "common" terminal and now have to figure out which of the two remaining terminals are volts and which is amps. When I had the meter open I noted that one of the remaining terminals was connected to the coil at the meter movement while the other seems to be connected to a flat coil that goes across the meter above the movement. Any ideas on how to check it with an ohm meter and if so, whats the procedure? PL
::
::The shunt coil across the meter movement is the ammeter connection--the load goes in series with this.
:
:The Volts has high resistance, the Amps is low.
:Lewis

Thanks guys, thats great, I can confirm two ways. PL