Model 390-2
Volt-Amp-Wattmeter
INSTRUCTION MANUAL
Page 1: ...Model 390 2 Volt Amp Wattmeter INSTRUCTION MANUAL...
Page 2: ...f its authorized service centers with transportation charges prepaid and which its examination shall disclose to its satisfaction to have been thus defective this warranty being expressly in lieu of a...
Page 3: ...where a leakage current from that part to ground exceeds 0 5 milliampere when mea sured with an appropriate measuring instrument defined in Section 11 6 1 of ANSI C39 5 NOTE The proper measuring instr...
Page 4: ...ements 0 150V 0 300V 9 4 6 AC Current Measurements 0 3A 0 15A 9 4 7 AC Watts 0 300 0 1500 Using Break In Plug Line Voltage 0 150 11 4 8 AC Watts 0 600 0 3000 Using Break In Plug Line Voltage 0 300 12...
Page 5: ...us ranges apparent All markings are screened on the panel with epoxy white enamel for maximum legibility The ammeter connectors are identified with a red dot and the voltmeter connectors are identifie...
Page 6: ...ing or shipping of the Instrument 2 2 Power Source Requirements No supply source is required The Instrument is energized by the circuit being measured 2 3 Installation The Instrument can be set horizo...
Page 7: ...connection for 150 volt range Also common for 300 1500 watt range wattmeter con nection 8 300 VOLTS Jack white dot Voltage coil connection for 300 volt range Also common for 600 3000 watt range wattm...
Page 8: ...proper input jacks before applying power 4 Make sure work area as well as hands and shoes are dry 5 Avoid making tests and measurements under humid damp or other envi ronmental conditions that could a...
Page 9: ...4 5 AC Voltage Measurements 0 150V 0 300V 1 Connect the leads from the Break in Plug Assembly according to color as shown in Figure 4 1 Connect the white lead to the jack marked 150V when testing 120...
Page 10: ...by 10 The first heavy line above zero represents 0 5A on the 3A range and 2 5A on the 15A range 7 Special test leads can be substituted for the Break In Plug when necessary paragraph 4 3 Open break t...
Page 11: ...Connect the leads from the Break In Plug according to their color as shown in Figure 4 1 NOTE When the red lead is connected to the 3A terminal and the white lead is connected to the 150V terminal as...
Page 12: ...s indicates that the 600 watt range is being used When the red wire is connected to the 15A terminal the range is 3000 watts as indicated by the line on the panel connecting the 300V and 15A terminals...
Page 13: ...itions as shown in Figure 4 4 Figure 4 4 Connections for Measurement in Single Two and Three Phase AC Three Wire Circuits 4 11 Troubleshooting You will find many uses for the Model 390 2 in checking t...
Page 14: ...faulty circuits with certain wattage readings 5 THEORY OF OPERATION 5 1 AC And DC Voltmeter Circuit Figure 5 1 shows the circuit used when making voltage tests The multiplier resis tors for the 150V a...
Page 15: ...ure 5 1 5 2 and 5 3 together with the AMPS and WATTS pushbuttons are combined in the complete schematic diagram shown in Figure 7 1 5 5 Break In Plug The special Break In Plug supplied permits connect...
Page 16: ...ase Service data or shipping instructions will be sent to you promptly If an estimate of charges for non warranty or other service work is required a maxi mum charge estimate will be quoted This charg...
Page 17: ...r Spool 10 675328 R4 Resistor Bobbin 10 805200 Phenolic Case 3 360107 Meter Cover Assembly 10 560179 Lower Cover 3 230372 Banana Plug 5 131969 Pushbutton 3 310214 Break In Cord Assembly 10 863226 Figu...
Page 18: ...18 SIMPSON ELECTRIC COMPANY 853 Dundee Avenue Elgin IL 60120 3090 847 697 2260 FAX 847 697 2272 Printed in U S A Part No 05 118348 Edition 6 2 03 Visit us on the web at www simpsonelectric com...
