User manual SEARS 82413
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Manual abstract: user guide SEARS 82413
Detailed instructions for use are in the User's Guide.
[. . . ] If the tester is connected across a high energy circuit when set to a 1ow resistance range, a
is
current _range, or any other low impedance range, the circuit
virtually shorted.
Disconnect the tester or turn
off
the
power before
changing switch positions.
Do not connect to circuits with voltage present when switclr is in any ohms or current position. Whcn rcplacing fuses use only specificd type fuses and inscrt in correct fuse notd"j. , , _
is available. Conract a qualified person for assistance before attempting to make measurements on any high energy
circuit.
Special equipment designed
for
use with these circuits
SAFETY rS No ACCIpENT
-2-
2. PROTECTION-UL
Fully Overload hotected
- Ot*l. . d
1244, VDE O4I1
3.
SPECIFICATIONS
and
protection is accomplishcd orr rrll t;trtllcs For overvoltage protection' a seclected sparkgap witlr low capacidance is-used which proved superior in pcrlirrtttrtrrcc'than the varistors used in other instrumcnts Art ilrrrrslr ( tlrrcnt limiter combination protects 500V DC or lttrs A(l trrt all
resistance rages.
Geneil
oi"pt"y, ZUdigit LcD. [. . . ] Slide the POWER/FUNCTION switch to , , DC O, ' (mid
hFE Test
i"rt. orditior :
hFE gain 0
-
1OuA 2. 8V 1000 (NPN. PNP)
3.
Set RA, NGE switch to desired , , V', position.
position).
-7-
untill satisfactory reading is obtained.
-""r. r1"rn"rr, factor is not known, set switch to highest "ru range and reduce
of Value not only for this functioniut
If
magnitude
4. Connect test leads
5.
to device or circuit bcing measured.
Turn on power to device or circuit bcing measured. Voltage value wili appear on Digital Display aiong with
the voltage polarity.
DC Current Measurement 1. . Red lead to "mA" jack for measurcrncr)ts rrp to Black lead to "COM" jack.
For measuremenb between 2 Amps and red lead to "l0A" jack.
the resistance being measured. is connected to a circuit, discharge all capacitors before applying test prods, 4. q Read resisrance value on Digital Display.
3.
If
turn off power and
2 Amps,
Diode Tests
L. POWER/FUNCTION switch to , . DC 0, ', , and 3, Ifthe
l0
Amps, connect
)
J.
POWER/FUNCTION switch to "I)C ()", rnd RANGE switch to desired "A'' position. Open the circuit to be measured, and conncct test leads IN SERIES with the ioad in which currcnt is to be
measured.
, 4. semiconductorjunction being measured is connected to a circuit, turn off power and discharge all capacitors. In case of connection of forward (Red to anode, Black to, cathode) a good diode shows a value. If the diode under is defective, "000, ' (shorted), o, , , 1, , (opend)
_test
Read current value on Digital Display.
AC Voltage Measurements
When the test leads are connected reverse (Red to cathode, Black to anode), a good diode shows , , 1i'. Ifit is defective, "000" or other figures are to be displaved.
L. POWER/FUNCTION switch to "AC", and RANGE switch to desired "V" position. Read voltage vaiue on Digital Display.
Resistance Measurements
Continuity Checks
1. 2.
Red lead
POWER/FUNCTION switch to "DC switch to desired "OHM" position.
to "V.
f, }", Black lead to "COM".
1. POWER/FUNCTION switch to , , DC A" , and RANGE switch to Btzzer ( , r|) ) position. Built-in buzzer sounds if the circuit under test is con_
tinuous.
s2", and
RANGE
-9-
ments
th" -"t"t can be used for making temperature measureby connecting the tempelature probe (included) to , , v. o, , , and , , coM" jack.
Do not exceed 150V continuously or 300V momentary (no more than l0 seconds) to avoid any dannge between the . . V. A" and "COM" jack or instrument.
POWER/FUNCTION switch to "DC o" , and RANGE switch to "TEMP" position. [. . . ] METAL
20Ka
a)2 c1, 2, 3
C4
C5
ZENERDIODEl2V]N963
R22
R23
c6, 7, t7, 12, 73
c8 c9
('1 0
cl5,
c16
c14
17
cr8, 19, 20
c21, 26, 27
c22
c25 c28
8C1, , 2
R1
R2 R3
R4
RESISTOR l OMA IIW ( . MI-TA I
ZENER DIODI] 1, 2V 1N 94918 CAPACITOR it}pF ]6V ELECTROLYTI. ] CAPACITOR 1p F 16V IANTAI_ CAPACITOIi. 4. 7p F 1 6V E T. ECTROLYTIC CAPACITOR 0. 1rJ F 63V ME tAL|ZF, D CAPACITOR 0. 022!F 630V MrCA CAPACITOR O. 04'1 1tF 63v METAI, IZED CAITACIIOR 0. 22pF 63y MHT, ALIZED CAPACITOR 100pF 50V MtCA CAPACITOR 0. 01p F 50V CERAMIC CIAItrACITOR 30pF 50V CERAMIC CAPACITOR 0. 33pF 16V ELECTROLYTTC CAPACITOR 0. 022pF 5Ov CERAMTC CAPACITOR 0. 22pF 50y CERAMIC CAPACITOR. METAI,
P, 24, 25
\2?
R26, 28
R29 BR1 BR2
BR3. 6
VR1, 2 VR3 VR4 VR5, 6 VR7
BVR. 1
RNA
RNB RNC RND RNE
RNF
RNG
RS
RESISTOR lMf} /rW I. [. . . ]
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