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Summary of Contents for Simpson 390-2
- Page 1 Model 390-2 Volt-Amp-Wattmeter INSTRUCTION MANUAL...
- Page 2 SIMPSON ELEC- TRIC COMPANY neither assumes nor authorizes any other persons to assume for it any other liability in connection with the sales of its products.
- Page 3 0.15 microfarad capacitor connected between the terminals of the measur- ing instrument. The leakage current is that portion of the current that flows through the resistor. The Simpson Model 229-Series 2 AC Leakage Current Tester meets the ANSI C39.5 requirements for the measurement of AC leakage current and can be used for this purpose.
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Page 4: Table Of Contents
Contents 1. INTRODUCTION ................5 General ....................5 Description ..................5 Technical Data ..................5 2. INSTALLATION .................. 6 Unpacking ................... 6 Power Source Requirements .............. 6 Installation ................... 6 3. CONTROLS, CONNECTORS & INDICATOR ........6 Description ..................6 4. -
Page 5: Introduction
Approximately 2% should be added to the readings. The accuracy of the Model 390-2 is 5% or better of full scale reading. The errors due to phase angle and frequency are so small that they can be disregarded within the normal frequency range of 50 to 144 Hz. -
Page 6: Installation
FREQUENCY: 50-133 Hz, no correction required RESPONSE: 25 Hz, add 2% to reading METER SIZE: 3 inches DIMENSIONS: Height: 5-7/8" (149mm) Width: 3" (76mm) Depth: 3-1/2" (64mm) WEIGHT: 2-1/2 lbs. (1.13Kg) INSTALLATION Unpacking Examine the shipping carton for signs of damage before unpacking. If shipping carton is in good condition, unpack and inspect the Instrument for damage in- curred during shipment. - Page 7 ±Current Jack (black dot): Source side of current coil. AMPS Pushbutton: When depressed, provides an AC current indica- tion in amperes on the meter if a load is con- nected. WATTS Pushbutton: When depressed, provides an AC power con- sumption indication in watts on the meter if a load is connected.
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Page 8: Operation
Instrument. Safety Precautions The Model 390-2 is intended for use by personnel who are qualified to recognize shock hazards and trained in the safety precautions needed to avoid possible injury. Refer to the “SHOCK HAZARD” definition on page 3 of this manual. -
Page 9: Input Lead Connections
Input Lead Connections Always make the connections to the Model 390-2 in accordance with the direc- tions given in the following paragraphs before making connections to the power source. When testing line-operated devices, always use the Break-In Cable Assembly supplied with the Instrument (see Figure 4-1 on page 7). Make up a cable adapter set for use on 240 VAC line-operated devices (see Figure 4-3 on page 12). - Page 10 0-300V 0-15A 3000W 300V 0-150V 300W 0-3A 150V MODEL 390 2 PRESS BLACK ± VOLTS ± NORMAL BLACK CABLE LINE LOAD ± ± BREAK-IN WHITE PLUG Figure 4.1 Break-In Plug Connections, 150V, 3A and 300W Ranges Insert the Break-In Plug into 120V power outlet (in the AC line), or follow procedures as given in paragraph 4.3 for 240V power.
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Page 11: Ac Watts 0-300, 0-1500, Using Break-In Plug (Line Voltage 0-150)
SOURCE Figure 4.2 Model 390-2 and Special Test Lead Set Application 11. Connect the Model 390-2 as an ammeter in series with the line and the load using the Special Test Lead Set, or as a wattmeter (see Figure 4-2). -
Page 12: Ac Watts 0-600, 0-3000, Using Break-In Plug (Line Voltage 0-300)
The power factor of a circuit can be determined with the Model 390-2 in the following manner. Take the voltage, current and power readings of the circuit... -
Page 13: Use Of Wattmeter With Two & Three Phase Circuits
4.11 Troubleshooting You will find many uses for the Model 390-2 in checking the three simple tests which diagnose most cases of electrical trouble: line voltage, current drain and power consumption, . High current drain and high power consumption generally indicate shorted turns in a motor, too heavy a load or shorted sections in ele- ments of heaters, irons, etc. -
Page 14: Theory Of Operation
same indications apply to refrigerators, oil burners, washing machines, ventilat- ing fans, air conditioning systems, air compressors, water pumps, vacuum clean- ers, heaters, irons, toasters, waffle irons, food mixers, lighting circuits, heat lamps, radios, televisions and all devices which use a motor or transistorized circuitry. The wattmeter section may also be used as an indicator for problems with solid- state radios, stereo sets or television receivers. -
Page 15: Ac Wattmeter Circuit
AC Wattmeter Circuit Figure 5-3 shows the circuit used when the WATTS pushbutton is depressed and the Break-In Plug is connected for the 300 watt range. In this position the arma- ture of the meter is connected across the line through a series resistor and the field coils of the meter are connected across the current transformer T1. -
Page 16: Maintenance
Pack the Instrument carefully and ship it prepaid to the proper destination. Insure the shipment. Care The Model 390-2 has a rugged exterior, but its mechanism is delicate. Keep it clean, free from continuous, severe vibration and avoid dropping it. ORDERING INFORMATION AND... - Page 17 Lower Cover 3-230372 Banana Plug 5-131969 Pushbutton 3-310214 Break-In Cord Assembly 10-863226 WATTS PRESS 300V 150V – ARMATURE FIELDS – R1—1 SPOOL R2—1 SPOOL R3—1 RESISTOR R4—1 BOBBIN AMPS R5—1 SPOOL PRESS R6—1 SHUNT RESISTOR Figure 7-1. Model 390-2, Schematic Diagram...
- Page 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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