Amprobe FS-3 User manual

How to Use as an
OHMMETER
■ CAUTION
Make certain no voltage is present in circuit before con¬
necting ohmmeter to circuit. The ohmmeter is fused to
help protect against misapplication of voltage but under
certain conditions it is still possible to damage the meter
and/or obtain incorrect readings.
1. Insert both red and black
voltage leads into voltage
receptacles at bottom of
instrument. See Fig. 3.
2. Move rotary switch to
either of two ohms range
position.
3. With both leads far apart
(not touching), pointer
should line up with the
division marked on
ohms scale.
4. With test leads shorted or
touching, line up pointer
with “0” mark on ohms
scale by turning zero ad¬
just knob. See Fig. 4.
NOTE: If turning ohm¬
meter zero adjust knob
does not line up pointer
on zero mark replace bat¬
tery and/or fuse. (See
page 6 for fuse and bat¬
tery information).
1
ACCESSORIES
Used with FS-3, FS-3C
Description Model
Fuse - 0.5 Amps.8AG-361.5
Battery -1 “AA”.S915
Immersion Probe.RBT-11P
Universal Probe.RBT-12P
Vented Probe.RBT-13P
Carrying Case.“L”
Clip Leads.VL-11S
Replacement Tips for VL-11S.PT
SERVICE
Manufacturing number is die stamped in upper left hand
corner of the scale plate.
For factory service, package instrument and packing slip
with sufficient cushioning material in a shipping carton;
make certain your name and address also appear on box
as well as packing slip; ship prepaid via U.P.S. (where
available) or Air Parcel Post insured to:
Service Division
AMPROBE INSTRUMENT
630 Merrick Road (Use for U.P.S.)
P.O. Box 329 (Use for Parcel Post)
Lynbrook, NY 11563-0329
Outside the U.S.A. the local Amprobe representative will
assist you.
How to Use as a
THERMOMETER
1. Move rotary switch to Temperature position (X100) and
keep switch at this position for all temperature
measurements.
2. With both leads inserted, short leads together and zero
adjust by moving knob. If this is not possible then
change fuse or battery.
3. Remove voltage leads and insert temperature probe. See
Fig. 4. Use an RBT-11P, RBT-12P or RBT-13P depending
on medium. (See page 6 for probe information).
A AMPROBE INSTRUMENT
A UNITED DOMINION COMPANY. LYNBROOK. NEW YORK 11563
a
Part No. 956750
10/96
OPERATING INSTRUCTIONS
for
AMPROBE®
Volt • Amp • Ohm • Temperature
FLAT SCALE CLAMP-ONS
Model FS-3 (Fahrenheit Scale)
and
Model FS-3C (Centigrade Scale)
NOTE: Do not move zero adjust knob after initially zero¬
ing. If knob is turned it will result in incorrect temper¬
ature or ohms readings.
A
AMPROBE INSTRUMENT'
A UNITED DOMINION COMPANY, LYNBROOK. NEW YORK 11563
Pan<a A

LIMITED WARRANTY
general
Congratulations! You are now the owner of an AMPROBE®
instrument. It has been quality crafted according to quality
standards and contains quality components and workman¬
ship. This instrument has been inspected for proper opera¬
tion of all of its functions. It has been tested by qualified
factory technicians according to the long-established
standards of AMPROBE INSTRUMENT.
Your -AMPROBE instrument has a limited warranty
against defective materials and/or workmanship for one
year from the date of purchase provided that, in the opin¬
ion of the factory, the instrument has not been tampered
with or taken apart.
Should your Instrument fall due to defective materials, and/or
workmanship during the one-year warranty period, return it
along with a copy of your dated bill of sale which must iden¬
tify instrument by model number and Mfg. number.
For your protection, please use the instrument as soon as
possible. If damaged, or should the need arise to return
your instrument, it must be securely wrapped (to prevent
damage in transit) and sent prepaid via Air Parcel Post in¬
sured or UPS where available to:
Service Division
AMPROBE INSTRUMENT
630 Merrick Road (For U.P.S.)
P.O. Box 329 (For P.P.)
Lynbrook, NY 11563-0329
Outside the U.S.A. the local Amprobe representative will
assist you. Above limited warranty covers repair and
replacement of instrument only and no other obligation is
stated or implied.
PRECAUTIONS FOR PERSONAL
AND INSTRUMENT SAFETY
IMPORTANT:
1. Read these instructions thoroughly and follow
them carefully.
2. In many instances you will be working with
dangerous levels of voltage and/or current,
therefore, it is important you avoid direct contact
with any uninsulated, current-carrying surfaces.
Appropriate insulating gloves and clothing
should be worn.
3. Before connecting or disconnecting the voltmeter
to or from the circuit to be tested, turn off all
power to the circuit.
4. Before applying test leads to circuit under test,
make certain that leads are plugged into proper
jacks and switches are set to proper range and
function.
5. Before using any electrical instruments or tester
for actual testing, the unit should be checked on a
low energy high impedance source. Do not use
power distribution lines or any other high energy
sources.
6. Make certain no voltage is present in circuit,
before connecting ohmmeter to circuit.
7. The jaws of clamp-on instruments should not,
under any circumstances, be used as a device to
hold or hang the instrument. When using the
instrument as a voltmeter or ohmmeter, never
clamp the jaws around or on to a conductor box or
anything else — conducting or non-conducting.
Models FS-3, FS-3C are supplied with a set of test leads
(VL-11S) and an 0.5 Amp fuse. Temperature Probes and
other accessories are available separately.
The Flat Scale Clamp-Ons FS-3, FS-3C are capable of
measuring Volts, Amps, Ohms and Temperature. By turn¬
ing the rotary switch to the particular area, any one of these
functions can be selected. No separate attachment is
necessary for ohms. Temperature measurements can easi¬
ly be made by inserting probe in side of instrument housing.
Refer to individual instructions for each function.
The ohmmeter of the FS-3, FS-3C uses an “AA” battery
and an 0.5 amp 250 volt fuse. To replace either fuse or bat¬
tery remove two screws on back case, slide case horizon¬
tally toward you and lift off. See Fig. 2. Replace with cor¬
rect fuse. See page 6. Observe proper polarity when
replacing battery.
SPECIFICATIONS OF FS-3 & FS-3C
Functions: Volts AC, Amps AC, Ohms, Temperature
Ranges: 6, 15, 40, 100, 300 Amps
150, 300, 600 Volts AC
RX1 and RX100 Ohms with 25 Ohms midscale
on RX1 %
FS-3 - 25° F to 225° F
FS-3C -32°C to 107°C
Frequency: 50/60 HZ.
Accuracy: ± 3% of F.S. on Amps, Volts
‘ ± 3% of Scale Length Ohms, Temperature
Battery: 1 “AA”
Fuse:t).5 Amps 250V - Fast blow
How to Take
CURRENT READINGS
1. Make certain meter lock is in off position. See Fig. 1.
Meter is free when button is pushed to the far right.
2. Make sure pointer is reading zero. For greater ac¬
curacy, the pointer should be set on the zero line. This
is done by manually moving the zero adjust screw. See
Fig. 1.
3. Turn rotary switch to highest current range if current to
be measured is unknown.
4. Press trigger to open jaws.
5. Encircle conductor with transformer jaws.
6. Release trigger and be sure that jaws close properly
before taking reading.
7. If reading is below half scale, move rotary switch to the
next lower range. Keep moving rotary switch to lower
ranges until pointer is indicating in the upper half of
the scale.
How to Take
VOLTAGE READINGS
IMPORTANT
Read “PRECAUTIONS FOR PERSONAL AND
INSTRUMENT SAFETY” before using instrument.
1. Insert bayonet type voltage test leads into voltage
receptacles at bottom of instrument. Push against
receptacle spring and twist to lock in place. See Fig. 3.
2. Turn rotary switch to highest voltage range if voltage
to be measured is unknown.
3. Connect one alligator clip to one side of voltage to be
measured. Then with meter in one hand touch the
other side of voltage source with other lead. If reading
is below half scale move rotary switch to the next
lower range. Keep moving rotary switch to lower
ranges until pointer is indicating in the upper half of
the scale.
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