Using the best range
Autoranging meters automatically select the range
that gives you the best resolution. For example, when
measuring 24VAC, the meter will select the 40VAC
range and display "24.0". In the 400Vrange, you'd
see "24" and in the 4V range you'd see "OL" for overload. When an n (nano), m (micro), m (milli), K, or M
shows up in the display, you must multiply by 10
-9
,
10
-6
, 10-3, 103, and 106respectively.
You can manually select the range by pressing the
O button until you get the range you want. This can
keep the decimal from bouncing around when measuring a parameter that varies from just a little below
the top of the range to a little over.
Backlight (SC46)
The SC46 has a backlight that allows the user to
read the display in any lighting conditions. Make sure
the area being tested is well lit. The backlight comes
on when the button is depressed and stays on for
60sec before turning off to conserve battery life.
Symbols used:
Caution, risk of electric shock
Caution, refer to manual.
Ground
Double insulation
OPERATOR’S MANUAL
For your safety...
General: Disconnect the test leads before opening
the case. Inspect the test leads for damage to the
insulation or exposed metal. Replace if suspect.
Never ground yourself when taking electrical measurements. Do not touch exposed metal pipes, outlets,
fixtures, etc., which might be at ground potential.
Keep your body isolated from ground by using dry
clothing, rubber shoes, rubber mats, or any approved
insulating material. When disconnecting from a circuit, disconnect the "RED" lead first, then the common lead. Work with others. Use one hand for testing. Turn off power to the circuit under test before cutting, unsoldering, or breaking the circuit. Keep your
fingers behind the finger guards on the probes. Do
not measure resistance when circuit is powered. Do
not apply more than rated voltage between input and
ground.
All voltage tests:All voltage ranges will withstand
up to 600V. Do not apply more than 600VDC or
600VAC rms.
AC tests: Disconnect the meter from the circuit
before turning any inductor off, including motors,
transformers, and solenoids. High voltage transients
can damage the meter beyond repair. Do not use
during electrical storms.
Maintenance
Clean the exterior with clean dry cloth. Do not use
liquid.
Battery replacement: When the multimeter dis-
plays " " the battery must be replaced.
Disconnect and unplug leads, turn meter off, and
remove the battery cover. Replace both of the two
AAA (1.5V) batteries.
Limited warranty
This meter is warranted against defects in material or workmanship for one year from date of purchase. Fieldpiece will replace or repair the defective
unit, at its option, subject to verification of the defect.
This warranty does not apply to defects resulting
from abuse, neglect, accident, unauthorized repair,
alteration, or unreasonable use of the instrument.
Any implied warranties arising from the sale of a
Fieldpiece product, including but not limited to
implied warranties of merchantability and fitness for a
particular purpose, are limited to the above.
Fieldpiece shall not be liable for loss of use of the
instrument or other incidental or consequential damages, expenses, or economic loss, or for any claim of
such damage, expenses, or economic loss.
State laws vary. The above limitations or exclusions may not apply to you.
Obtaining service
Send the meter freight prepaid to Fieldpiece
Instruments. For warranty service also send proof of
date and location of purchase. For out-of-warranty
service send $45 (SC44), $50 (SC45), $65 (SC46)
check or money order. The meter will be repaired or
replaced, at the option of Fieldpiece. We will pay for
the shipping to you using the same method (ground,
air, next day, etc.) used to ship product to us.
!
AUTO-RANGING DIGITAL
CLAMP METERS:
SC44, SC45, SC46
Description
The mini clamp-on meters are made for the technician who is looking for a small, low cost meter that
has most of the functions he needs, day in and day
out, without some of functions and convenience features available on bigger meters.
Non-contact voltage
With the grey tip on the amp clamp head close to
an AC voltage, press and hold the NCV button. The
NCV LED will light and the beeper will beep. The
closer you get to AC voltage, the louder the beep.
The NCV function is sensitive enough to detect
24VAC on thermostats. (24V to 600V, 50Hz to 60Hz)
Capacitance (SC45 amd SC46)
For motor-start and motor-run capacitors.
Disconnect the capacitor from power first. If the
capacitor is connected to the meter and “dsc” symbol
is shown on the LCD, it means there is voltage existing in the tested capacitor and needs to be discharged before testing. Short the terminals to discharge the capacitors. Disconnect any resistors that
might be between the terminals of the capacitor.
Hold
Press HOLD once to keep the latest reading displayed on the meter in the memory. Press the HOLD
button again to go back to normal mode.
True RMS (SC46)
Digital multimeters use two different types of AC
sensing. The most common is average sensing, normalized to a true RMS value of a sine wave. The
other is true RMS sensing. The actual true RMS
value is sensed. Either sensing method will give the
same results on a clean sine wave but they may differ on a non-sinusoidal waveform.
Temperature (SC45 and SC46)
Plug any K-type thermocouple directly into the
meter to measure temperature. Temperature measurement will be accurate even in fast changing environments because of excellent temperature compensation. One thermocouple is included. No adapter is
required.
Field °F calibration (SC45 & SC46)
For accuracies of ±1°F, calibrate to a known temperature. A glass of stabilized ice water is very close
to 32°F and is usually very convenient but any known
temperature can be used.
1. Select 400°F range and connect thermocouple.
2. Remove back case (2 screws on back, one near
clamp, other near base). Leave battery cover
attached so batteries stay within back case.
3. Stabilize a large cup of ice
water.
4. Immerse the thermocouple
tip and let it stabilize.
5. To change the temperature
scale to °C, close the
jumper just below VR5.
6. Adjust VR5 calibration pot
with a small screwdriver to
get within 0.1°F of 32°F.
Each 1/4 turn should
adjust the temperature
about 3°F, no more than 10°F total. There’s no
need rotating the screw more than 360°; doing so
gets you back to where you started.
7. Attach case without screws to preview the tem-
perature and continue until you have it dialed in.
Disable auto off
Set to OFF position, press and hold (SC44 and
SC45) or (SC46) button while turning rotary dial to
desired range position. Release the button when
LCD displays normally. Note: “APO” annunciator will
be missing from the display. The Auto Power Off
mode is on when “APO” indicated on the display.
VR5
Jumper
CLAMP
CAT.III
NCV
300V
400A
SPECIFICATIONS
Display: 3¾ digit liquid crystal display (LCD) with a maxi-
mum reading of 3999.
Range : Manual ranging mode (SC44 & SC45), hold
button for 2 seconds to return to autoranging mode.
Overrange: "OL" or “-OL” mark indication.
Auto power off: 10 minutes.
Operating environment: 32°F to 122°F at <70% R.H.
Storage temperature: -4°F to 140°F, @ <80% R.H. with
batteries removed.
Accuracy: Specifications good in ambient conditions of
74°F ±8°F, <75% relative humidity.
Temperature coefficient: 0.1×(specified accuracy) per °F.
(32°F to 66°F, 82 °F to 122°F).
Altitude: 6561.7 feet (2000m).
Power: Two AAA 1.5V batteries.
Battery life: 400 hours typical with alkaline (SC44),
300 hours typical with alkaline (SC45),
200 hours typical with alkaline (SC46).
Accessories: One pair test leads, (2) 1.5V AAA batteries
(installed), carrying case and operating instructions.
Safety: Designed to meet IEC61010-1 (EN61010-1) and
IEC61010-2-032 (EN61010-2-032), CATIII 300V, class II
and pollution degree 2 indoor use comply with CE,
UL61010B-1, UL61010B-2-032.
Temperature (SC45 and SC46)
Range: -30°F ~ 400°F
Resolution: 0.1°F
Accuracy:
±(1°F) 32°F ~ 120°F,
±(1% + 1.5°F) -4°F ~400°F,
±(2% + 4°F) -30°F ~ -4°F,
Sensor type: K-type thermocouple
Capacitance (SC45 and SC46)
Range: 4μF, 40μF, 400μF, 4mF
4.000mF = 4000μF
Resolution: 1.0nF
Accuracy: ±(3% rdg + 10 dgts) on 4μF
±(3% rdg + 5 dgts) on 40μF to 400μF
±(5% rdg + 20 dgts) on 4mF (4000μF)
Minimum input range: >100nF
Safety: “dsc” symbol on LCD indicates that the
capacitor must be discharged before testing.
DC volts
Ranges: 400mV (except SC46), 4V, 40V, 400V,
600V
Resolution: 0.1mV (1mV for SC46)
Accuracy: ±(0.5% rdg + 2 dgt)
Input impedance:
400mV > 100MΩ
4V = 10MΩ
40V~600V = 9.1MΩ
Transient protection: 6kV for 10μ sec
AC volts (50Hz - 500Hz)
True RMS: SC46 only, Crest factor: ≤3
Ranges: 4V, 40V, 400V, 600V
Resolution: 1mV
Accuracy(SC44, SC45): ±(1.2% rdg + 5 dgts),
±(1.5% rdg + 5 dgts) on 600V range
Accuracy(SC46): ±(1.2% rdg + 8 dgts),
±(1.5% rdg + 8 dgts) on 600V range
Input impedance:
4V = 10MΩ
40V~600V = 9.1MΩ
Resistance
Ranges: 400Ω, 4kΩ, 40kΩ, 400kΩ, 4MΩ, 40MΩ
SC45 and SC46 only have a 400
Ω
range.
Resolution: 0.1Ω (1Ω for SC45, SC46)
Accuracy:
±(1.0% rdg + 4 dgts) on 400Ω to 400kΩ ranges
±(1.5% rdg + 4 dgts) on 4MΩ range
±(3.0% rdg + 5 dgts) on 40MΩ range
Open circuit volts: -0.45VDC typical, (-1.2VDC on
400Ω range)
AC Current (50Hz - 60Hz)
True RMS: SC46 only, Crest factor: ≤3
Ranges: 40A, 400A, Resolution: 0.01A
Accuracy(SC44, SC45): ±(2.0% rdg + 6 dgts)
Accuracy(SC46): ±(2.0% rdg + 10 dgts)
Continuity
Audible indication: Less than 25Ω
Response time: 500ms
Diode Test
Test current: 1.2mA (appoximate)
Accuracy: ±(3.0% rdg + 3 dgts)
Resolution: 10mV
Audible indication: Less than 0.25V
Open circuit volts: 3.0VDC typical
Voltage
Amps AC Through Clamp
Resistance
Capacitance
Disconnect test
leads from voltage
before plugging in
thermocouple!
Insure the
temperature being
measured is stable.
Maintain good
contact between the
thermocouple and
what's being
measured.
WARNINGS
DISCONNECT AND UNPLUG TEST LEADS
before opening case.
TEST
NCV FUNCTION ON KNOWN LIVE
WIRE before using.
DO NOT APPLY VOLTAGE greater than
30VAC or 60VDC to the thermocouple or the
jacks when the rotary dial is on OFF.
REMOVE
THE THERMOCOUPLE when
taking voltage measurements.
DISCONNECT THE TEST LEADS when
taking temperature measurements.
DO NOT
APPLY VOLTAGE TO THE JACKS
when the rotary dial is on microamps. Even low
voltages can cause a current overload and blow
the fuse. Replace blown fuse to regain function.
Temperature
VAC/DC 600VDC or AC RMS
AAC 400 AAC
Resis tance 500VDC or AC RMS
Continuit y 500VDC or AC RMS
Diode 500VDC or AC RMS
Capacitance
(SC45 and SC46)
500VDC or AC RMS
Temperature
(SC45 and SC46)
60VDC or 30VAC RMS
Over l o ad Protection (S C44, SC45 and S C66)
A
0
0
4
V
0
0
3
I
II
.
T
A
P
C
AM
CL
NCV
CLAMP
CAT.III
NCV
300V
400A
! !
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