Appliance+Testing

= Appliance Testing  =

= =  On the 8-6-2011 we carried out appliance testing on various type 1 and type 2 appliances. = =  The tests that we carried out were:visual inspection, protective earth conductor, insulation resistance, polarity, circuit continuity.

Protective earth conductor: test between earth pin and exposed metal (<1ohm is acceptable)  Insulation reistance test: test between bonded phase and neutral pins to exposed metal and/or to earth pin (>1Mohm is acceptable)   Polarity: test from phase pin to phase terminal (<1ohm is acceptable)   Circuit continuity: test between phase pin and neutral pin with appliances switch closed (depends upon circuit resistance) = =  Test 1: class 1 appliance   The Toaster..............of malice Based on the tests carried out i would say the toaster can be used but from a personal opinion, the toaster is old and pritty had it, i suggest buying a new one.
 * visual inspection went well, nothing was wrong
 * Protective earth conductor: a digitech QM-1520 multimeter was used and set on the 200ohms scale, a result of 0.8 was produced which is satisfactory
 * Insulation Resistance Test: a digitech QM-1453 IR tester was used and set on 500v, a result of 853Mohms was produced which is satisfactory
 * Polarity: a digitech QM-1520 was used and set on 200ohms, a result of 120ohms was produced which showed that the phase is connected to the switch
 * Circuit continuity: a digitech QM-1520 was used and set on 200ohms, a result of 54.5ohms was produced. The calculated value of this is R=V^2/P, R=240^2/1000, R=57.6ohms Which are close enough to deem the result satisfactory.

Test 2: class 1 appliance The Kettle.............of doom From my results i belive the element to be broken causing an open circuit, this should be sent away for repair but i suggest buying a new kettle due to the current state of this one.
 * Visual inspection: the lid and two of the feet were missing, plus the maximum load warnings werent present causing unsatisfactory inspection
 * Protective earth conductor: digitech QM-1520 multimeter was used set on the 200ohms scale, no result leads me to belive there is an open circuit some where in the applainace
 * Insualtion resistance test: a digitech QM-1493 IR tester was used, set on 500v, the result was 1825Mohms which is satisfactory
 * Polarity: a digitech QM-1520 multimeter was used, set on 200ohms, the result was the same as the protective earth conductor test
 * Circuit continuity: same as the polarity

Test 3: class 2 appliance The Fan Heater.............of the ages
 * Visual inspection: aside from the front cover having slight melting from an unknown source the appliance is satisfactory
 * Protective earth coductor: class 2 appliances dont have an earth wire, they are double insulated insulated insteed
 * Insulation resistance: i decided that there was no point on doing this test as the heater was made so that the only way to touch the exposed metal was to dismantle the appliance to get to them
 * Circuit continuity: a digitech QM-1520 was used, set on 2000ohms, a result of 600ohms was measured which is well off what the calculated resistance should me ( calculated resistance=26.45ohms).