Elenco Electronics M-1006K, Assembly And Instruction Manual

Page 1: ...DIGITAL MULTIMETER KIT MODEL M 1006K Assembly and Instruction Manual Elenco Electronics Inc Copyright 2001 Elenco Electronics Inc 753096...

Page 2: ...ld 162200 1 R2 352k 5 1 2W orange green red orange green 163551 5 R18 R22 470k 5 1 4W yellow violet yellow gold 164700 1 R1 548k 5 1 2W green yellow gray orange green 165451 1 R23 1M 5 1 4W brown blac...

Page 3: ...nit 1 000 nano units 1 micro unit 1 000 milli units 1 unit 1 000 kilo units 1 kilo unit METRIC UNITS AND CONVERSIONS IDENTIFYING CAPACITOR VALUES Capacitors will be identified by their capacitance val...

Page 4: ...Component Lead Solder Soldering Iron Drag Foil 1 Solder all components from the copper foil side only Push the soldering iron tip against both the lead and the circuit board foil 2 Apply a small amou...

Page 5: ...W Resistor white brown black black brown see Figure A R14 4 7k 5 1 4W Resistor yellow violet red gold see Figure A R13 100 5 1 4W Resistor brown black brown gold see Figure A R19 470k 5 1 4W Resistor...

Page 6: ...e component side as shown in Figure D Adjust the wire so that it sticks out the other solder side of the PC board 3 16 of an inch Solder the wire to the PC board on the component side only Be sure tha...

Page 7: ...ver backing Place the LCD zebra frame and zebras into the top case as shown in Figure E Be sure that the LCD tab is in the same direction as shown in the figure Cut open the plastic envelope containin...

Page 8: ...Place the PC board over the selector knob Be sure that the 8 pin socket slides into its hole Then fasten the PC board with two 6mm screws as shown in Figure G Insert the 0 25A 250V fuse into the fuse...

Page 9: ...t wire so that there is less wire between the 10A DC and COM sockets If the meter reads low resolder the shunt wire so that there is more wire between the sockets 1 ACV Range 750 0 0 0 200 0 0 0 2 DCA...

Page 10: ...e following table Read the currents shown and compare to a known accurate meter If any of the above tests fail a Check the fuse b Check the value and soldering of resistors R7 R8 and R9 DC VOLTS TEST...

Page 11: ...ring of resistors R1 R6 and R12 hFE 1 Set the range switch to hFE and insert a small transistor into the appropriate NPN or PNP holes in the transistor socket 2 Read the hFE of the transistor The hFE...

Page 12: ...t is clocked at about two readings per second The digitized measurements are presented to the display as four decoded digits seven segments plus polarity The decimal point position on the display is d...

Page 13: ...switch closes This applies a known reference voltage to the input to the A D converter The polarity of this voltage is automatically selected to be opposite that of the unknown input voltage thus cau...

Page 14: ...erters One inverter shown for clarity 7 6 4 OSC 1 OSC 2 OSC 3 DIGITAL SECTION ANALOG SECTION of 7106 CREF RINT CAZ CINT INT CREF REF HI REF LO CREF BUFFER V 35 42 44 43 41 36 37 1 AUTO ZERO A Z Z1 A Z...

Page 15: ...alue required to give the correct RMS reading CURRENT MEASUREMENT Figure 6 shows a simplified diagram of the current measurement function Internal shunt resistors convert the current to between 0 199...

Page 16: ...mple series circuit is formed by the voltage source a reference resistor from the voltage divider selected by the selector switches and the test unknown resistor The ratio of the two resistors is equa...

Page 17: ...t known set the switch to the highest range 4 Connect the leads across the points to be measured and read the display If the range switch is too high reduce it until a satisfactory reading is obtained...

Page 18: ...lay it indicates that the battery should be replaced To replace battery and fuse 250mA 250V remove the 2 screws in the bottom of the case Simply remove the old fuse battery and replace with a new fuse...

Page 19: ...18 SCHEMATIC DIAGRAM...

Page 20: ...Elenco Electronics Inc 150 W Carpenter Avenue Wheeling IL 60090 847 541 3800 www elenco com e mail elenco elenco com...