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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 8 : Analog & Digital Multimeters"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example No. 8_1 Page No. 251"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The Current through Shunt at Full Scale Deflection = 0.000950 Amps\n",
"i.e 950 uAmps\n"
]
}
],
"source": [
"# A shunt extends the range of a 50-u\u0002A meter movement to 1 mA. How much is the current through the shunt at full-scale deflection?\n",
"\n",
"# Given data\n",
"\n",
"It = 1*10**-3# # Total Current=1 mAmps\n",
"Im = 50*10**-6# # Current (cause of meter movement)=50 uAmps\n",
"\n",
"Is = It-Im#\n",
"print 'The Current through Shunt at Full Scale Deflection = %0.6f Amps'%Is\n",
"print 'i.e 950 uAmps'"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example No. 8_2 Page No. 252"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The Shunt Resistance Rs needed to extend the range to 500 uA = 111.11 Ohms\n"
]
}
],
"source": [
"# A 50 u\u0002A meter movement has an Rm of 1000 Ohms\u0002. What Rs is needed to extend the range to 500 uA?\n",
"\n",
"# Given data\n",
"\n",
"It = 500*10**-6# # Total Current=500u Amps\n",
"Im = 50*10**-6# # Current (cause of meter movement)=50 uAmps\n",
"rm = 1000# # Resistance of moving coil=1000 Ohms\n",
"\n",
"Is = It-Im#\n",
"Vm = Im*rm#\n",
"\n",
"Rs = Vm/Is#\n",
"print 'The Shunt Resistance Rs needed to extend the range to 500 uA = %0.2f Ohms'%Rs\n"
]
}
],
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|
