522 Digital Wattmeter Instruction Manual
1522 DIGITAL WATTMETER Instruction Manual M-00270 EDITION : 2 ( SEP., 2005 ) Global Specialties,LLC 22820 Savi Ranch Parkway Yorba linda,CA 92887 WWW.globalspecialties.
SAFETY INSULATION CLASS I, POLLUTION DEGREE 2:IEC 1010-1 This instrument has been built & tested as per IEC publications prepared by Technical Committee No.66 ( Ref. No. CEI/IEC 10101:1990 ) : Safety requirements for electrical equipment for measurement, control & laboratory use. This instructions manual provides information and warning data which must be taken into consideration by the user for safety of operator and instrument.
PCB Components DPM-0295 PCB REV- 01 contd.. ======================================================================= Ref Designator Value ======================================================================= FND's DS1 Anode(GREEN) 0.5''Common DS2 Anode(GREEN) 0.5''Common DS3 Anode(GREEN) 0.5''Common DS4 Anode(GREEN) 0.5''Common CONNECTORS TABLE OF CONTENTS SECTION PARTICULARS CON1 5PIN,2.54MM MALE CON2 3PIN,2.
SECTION - 1 GENERAL INFORMATION DESCRIPTION : Vector model 1522 Digital Wattmeter is an accurate low cost instrument designed for use in Engneering, Quality control and Production Test departments to determine the power consumption of equipments operating directly from a standard 110 - 150V AC, 60Hz line. Instrument features large L.E.D. display. In addition to power measurement, the wattmeter measures AC (true RMS) voltage and AC (true RMS) current. The Digital Wattemeter is easy to operate.
PCB Components 767E/01 PCB REV-01 contd... ======================================================================= Ref Designator Value ======================================================================= ICs SECTION - 2 SPECIFICATIONS LINE INPUT VOLTAGE : 110 - 150V AC, 60Hz MAXIMUM AC CURRENT rms peak : : 20Amps. 35Amps peak. MAXIMUM POWER : 1999W. 0.5 to unity.
SECTION - 3 INSTALLATION OPERATION : Before operating the instrument, read the manual thoroughly and make sure that you understand and observe all safety instructions.The maximum continuous output current on the outlets(Front/Rear) should not exceed the maximum current indicated on the front panel. The "ON" Switch provided on the front panel can be used to connect or disconnect the power to the load. Initally, keep the Power 'ON' switch on the front panel in the 'OFF' position.
PCB Components 767E/01 PCB REV-01 contd... ======================================================================= Ref Designator Value ======================================================================= RESISTORS R36 200K(390K),1/4W,0.1%,MFR R37 10M(20M),1/4W,0.1%,MFR R38 10M(20M),1/4W,0.1%,MFR R39 200K(390K),1/4W,0.
The instantaneous power consumed by the load. : w(t) = v(t) * i(t) where, w(t), v(t) and i(t) are instantaneous values of power, voltage and current respectively. The instantanous power waveform is filtered by R32, C11 and buffered by IC17 (TL071). IC18 (TL071) is configured as a non-inverting amplifier. The gain is decided by the ratio of R34 and R42. Preset PR15 (WCAL) is used to set this gain to 2. The DC voltage at test point TPW2 should be adjusted to 200mV for a load power of 1000 W.
COMMON MODE REJECTION (CURRENT MEASUREMENT) : Monitor the waveform on TPI1 on an oscilloscope and adjust preset PR5 (I-CMRR) so that the trace is flat. This can also be verified on an AC millivoltmeter. The reading will be minimum at the correct setting. With the Digital Wattmeter switched off, reconnect the VIN H and VIN L inputs on the Main pcb. Switch on the Digital Wattmeter. VOLTAGE CALIBRATION : Measure the line voltage with a multimeter (AC voltage measurement).
