Elenco 3 1/2 Digit Cap. / Trans. Kit - Manual (Page 30)

-6-
ASSEMBLY
The meter kit has been divided into a number of
sections to make the assembly easy and avoid
major problems with the meter operation.
ONLY OPEN COMPONENT BAGS THAT ARE
CALLED FOR IN YOUR ASSEMBLY PROCEDURE.
DO NOT OPEN ANY OTHER BAGS.
Do not build more than one section of your meter at
a time. Your instructor must approve the proper
operation of the section you have built before you
proceed to the next section. This procedure will
minimize the problems you may have at the
completion of the project.
Your kit program is divided into Sections “A – F”. The
small parts bags will be marked accordingly. The
sections are listed below.
Section A - Meter Display Circuit Assembly.
Section B - DC Voltage and Current Circuit
Assembly.
Section C - AC Voltage and Current Circuit
Assembly.
Section D - Resistance & Buzzer Circuit Assembly.
Section E - Capacitance and Transistor Circuit
Assembly.
Section F - Final Assembly.
IMPORTANT CONSTRUCTION NOTES
1. Wash your hands with soap and water before you
assemble this kit. The high impedance areas on
the circuit board can be contaminated by salt and
oil from your skin. If these areas become
contaminated, your completed multimeter may
not meet the listed specifications. Handle the
circuit board only by its edges.
2. Avoid any excessive accumulation of resin build-
up whenever you solder a connection.
3. Take your time assembling the circuit board.
Work at a slow pace. Remember that accuracy is
far more important than speed.
4. When you perform the steps in assembly, identify
each respective component before you install it.
Then position it over its outline on the top legend
side of the PC board, unless otherwise indicated.
5. Check for the proper polarity of ICs, diodes,
electrolytic capacitors, battery snap and LCD.
BATTERIES
• Do not short circuit the battery terminals.
• Never throw battery in a fire or attempt to open its
outer casing.
• Use only 9V type, alkaline or carbon zinc battery
(not included).
• Insert battery with correct polarity.
• Non-rechargeable batteries should not be
recharged. Rechargeable batteries should only be
charged under adult supervision, and should not
be recharged while in the product.
• Remove battery when it is used up.
• Batteries are harmful if swallowed, so keep away
from small children.
-29-
AC Voltage
Range Resolution Accuracy Maximum Input
200mV 100
μ
V +1.5% of rdg + 2dgt
2V 1mV +1% of rdg + 2dgt
20V 10mV +1% of rdg + 2dgt AC 750V maximum 50Hz - 400Hz
200V 100mV +1% of rdg + 2dgt
750V 1V +1.5% of rdg + 2dgt
Resistance
Range Resolution Accuracy Test Current Input Protection
200
Ω
0.1
Ω
+1% of rdg + 2dgt
2k
Ω
1
Ω
+0.8% of rdg + 2dgt
20k
Ω
10
Ω
+0.8% of rdg + 2dgt Approximately Protected By
200k
Ω
100
Ω
+0.8% of rdg + 2dgt 1.2mA PTC
2M
Ω
1k
Ω
+0.8% of rdg + 3dgt
20M
Ω
10k
Ω
+2.0% of rdg + 4dgt
Maximum open circuit voltage: 2.8V
DC Current
Range Resolution Accuracy Protection
200
μ
A 100nA +1.5% of rdg + 2dgt
2mA 1
μ
A +1.5% of rdg + 2dgt Protected by
20mA 10
μ
A +1.5% of rdg + 2dgt 250V/2A Fuse
200mA 100
μ
A +2% of rdg + 2dgt
20A 10mA +2.5% of rdg + 3dgt
AC Current
Range Resolution Accuracy Protection
200
μ
A 100nA +1% of rdg + 3dgt
2mA 1
μ
A +1% of rdg + 3dgt Protected by
20mA 10
μ
A +1% of rdg + 3dgt 250V/2A Fuse
200mA 100
μ
A +1.5% of rdg + 3dgt
20A 10mA +2.0% of rdg + 3dgt
Capacitance
Range Resolution Accuracy Protection
2nF 1pF +2.5% of rdg + 3dgt
2nF 10pF +2.5% of rdg + 3dgt
200nF 100pF +2.5% of rdg + 3dgt Test frequency 400Hz
2
μ
F 1nF +2.5% of rdg + 3dgt
20
μ
F 10nF +2.5% of rdg + 3dgt
200
μ
F 100nF +5% of rdg + 3dgt