Sencore FE149 - Page 2

Safety Precautions
When testing electronic equipment, there is always a danger present. Unexpected
high voltages can be present at unusual locations in defective equipment. The tech-
nician should become familiar with the device that he is working on and observe
the following precautions.
1. An isolation transformer should always be used on equipment having the chassis
tied to one side of the AC power line.
2. When making test lead connections to high voltage points, remove the power.
If this cannot be done, be sure to avoid contact with other equipment or metal
objects. Place one hand in your pocket as a safety precaution and stand on an
insulated floor to reduce the possibility of shock.
3. Discharge filter capacitors before connecting test leads to them. Capacitors
can store a charge that could be dangerous to the technician.
4, Be sure your equipment is in good order. Broken or frayed test leads can be
extremely dangerous and can expose the technician to dangerous potentials.
5. Remove the test leads immediately after the test has been completed to reduce
the possibility of shock ||
6. Do not work alone when working оп hazardous circuits. Always have anot
person close by in case of accident. Remember, even a minor shock can be
the cause of a more serious accident, such as falling against the equipment,
or coming in contact with higher voltages.
TABLE OF CONTENTS PAGE
Description . 3
Specifications . . 3
Controls оп the FEI 49 4
Operating the FE149 5
Reading DC Volts. : 9
Reading DC Volts Center Scale. 5
Reading AC Volts. dts 6
Reading Ohms . ; 6
Measuring DC Current А 6
Measuring AC Current . 7
Measuring Decibels (db). ^. 7i
Measuring Extremely Small Currents 8
Measuring High Voltage. 8
Checking the Batteries 9
Replacing the Batteries . LES AO UL ОСА ONIS ORAE SERE E ARP M)
Charging the Battery . . 5 o Ee D OU О cre ER 0)
Converting the ЕЕ149 for 230 VAC Operation A a HN od OLIO TONS: Gro О.
@vyerload Protection M Ри ЛАТЫН ТАМ КАЛУ ЛЫ а О
Disassembly Instructions to = Про МА РА РОСИ Ее
Calibrating the НЕТА E ИЕ КАТЫ О ЕСС в.
Circuit Description ТЕ пе А e и 115
Proble «Short e "ea E С Urt l4
рате Бена И ЕЕ
ILLUSTRATIONS PAGE
Бени dp Conversion Chart me оао оа о о OH оос е
Fig. 2 Function РС, Boardilayouts YS ал 2 ТОСЕ ЕСЕ
Біс. 3 AC Current са Circuiti i. аума бы 2 Oe 2
Fig. 4 Range & Function PC Board Layouts NUS | отела с шо Oke arg Enni sd
Fig. 5 <спешано артап ЖИЕ сс OG ad, I Mc obo oo М