Elenco Electronics M-1250K, Assembly And Instruction Manual

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* These parts are part of the main rotary switch assembly. This may come preassembled by the factory.
SEMICONDUCTORS
Qty. Symbol Value Description Part #
2 D1, D2 2CZ Diode 314148
1 Q2 A1015 Transistor 321015
2 Q1, Q3 C1815 Transistor 321815
MISCELLANEOUS
Qty. Description Part #
1 PC Board 516001
1 Fuse 0.5A, 250V 533004
2 1.5V Battery 590001
1 9V Battery 590009
1 Buzzer 595225
1 Selector Knob 622011
1 Zero Adjust Knob 622013
1 Case Bottom 623213
1 Top Cover Assembly 623116
1 Buzzer Case Top 623117
1 Buzzer Case Bottom 623214A
1 Selector Wiper 622014
1 Selector Base 622021
1 Screw M4 x 10 642309
2 Fuse Clip 663060
4 Input Sockets M-1250 664003
6 Transistor Socket M-1250 664004
1 Ball Bearing 666401
1 Selector Spring 680020
1 Battery Clip Double 680027
4 Battery Clip Single 680028
1 Wire 30AWG Stranded, 65mm (2.5”) Red 828202
1 Wire 30AWG Stranded, 65mm (2.5”) Yellow 828204
2 Wire 30AWG Stranded, 90mm (3.5”) Red 828220
1 Wire 30AWG Stranded, 90mm (3.5”) Green 828250
1 Wire 30AWG Stranded, 65mm (2.5”) Violet 828270
2 Wire 30AWG Stranded, 90mm (3.5”) White 828290
1 Wire 27AWG Bare 65mm (2.55”) or two 25.4mm (1”) wires 83J400
1 Lead-Free Solder Tube 9LF99
1 Test Lead Set 9TL11
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Specifications
Measurement Ranges Accuracy Remarks
DC Voltage (DCV) All ranges ±3% FS Input impedance 20k
Ω
/V
1,000V ±5% FS
DCV Null Meter 0 - ±5V 0 - ±25V ±5% FS Zero centering meter type input impedance 40k
Ω
/V
DC Current 50
μ
A - 2.5mA - 25mA - 250mA (50
μ
A at the DC 0.1V position) ±3% FS Terminal Voltage drop: 250mV
10A ±5% FS 100mV . . . . 50
μ
A
AC Voltage 0 - 10V - 50V - 250V ±4% FS Input impedance 9k
Ω
/V
1,000V ±5% FS
AF Output (dB) –10dB ~ +22dB (AC10V) ~ +62dB Input impedance 9k
Ω
/V for output terminal.
0dB/0.775V (1mW through 600
Ω
impedance circuit)
Resistance All ranges ±3% of arc Internal batteries: (2) 1.5V “AA”, (1) 9V
Buzzer Conduct indicator (buzzer is emitted at 20
Ω
or less.) Same
Ω
range, Power supply optional.
Battery Test (BATT) GOOD
_
?
_
BAD Color Coded Scale Load current 250mA
Leakage Current 0 - 150
μ
A at X1k range 0 - 15mA at X10k range Current across terminals.
(Iceo) (LI) 0 - 1.5mA at X100 range 0 - 15mA at X1 range
Terminal to Terminal Voltage (LV) Common to each
Ω
range 3V - 0V (Reverse of LI scale) Voltage applied across terminal while
Ω
is measured.
DC Current Amplification Transistor h
FE
: 0 - 1000 Insert h
FE
terminal (on scale) directly.
Factor (h
FE
) (in x 10
Ω
range)
Size - 6 x 3 7/8 x 1 1/2 inches
Weight - 0.62 pounds