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Table 7.2  Replacement Parts List

Reference
Number

Description

Part No.

T1

Transformer

1-112996

S1

Switch Assembly (Amps)

0-008818

S2

Switch Assembly (Watts)

0-008817

R3

Resistor

10-675575

R1,R2,R5

Resistor, 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

Figure 7-1.  Model 390-2, Schematic Diagram

–

R1—1 SPOOL
R2—1 SPOOL
R3—1 RESISTOR
R4—1 BOBBIN
R5—1 SPOOL
R6—1 SHUNT RESISTOR

+A

15A

3A

T1

R6

FIELDS

ARMATURE

+V

–

150V

300V

R1

R2

R5

R4

R3

S2

WATTS
PRESS

S1

AMPS
PRESS

Содержание 390-2

Страница 1: ...Model 390 2 Volt Amp Wattmeter INSTRUCTION MANUAL...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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