Fieldpiece SC420 SC440 Essential Clamp Meters User Manual
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Quick Start
1. For electrical testing, connect test leads to
"COM" and "+" jacks.
2. Rotate the dial to your desired measurement.
3. Connect to test points and read measurement.
4. For temperature testing, remove test leads,
slide TEMP switch to the right and connect
Type K thermocouple.
Certifications
UL 61010-1, Third Edition
EN61010-1
EN61010-2-032
EN61010-2-033
EMC EN61326-1
C-Tick (N22675)
WEEE
CATIII 600V, class II and pollution degree 2
indoor use comply with CE, RoHS compliant.
CATIII is for measurements performed in the
building installation.
Description
The new SC400 series clamp meters are
designed for HVACR service. Hang clamp meter
to any metallic surface with the redesigned
heavy-duty magnet and keep your hands free
to do more (SC440 only). See both voltage and
amperage readings at the same time on the
dual LCD display, even in low light conditions
using the bright blue backlight (backlight SC440
only). Take measurements with one hand using
the single test lead holder for added safety. Test
leads come with removable gold plated tips to
connect with Fieldpiece accessory heads.
Take more accurate VAC and AAC readings
on VFDs with True RMS sensing technology
(SC440 only). Measure the starting amp draw of
a compressor with Inrush current feature (SC440
only). Find the wire you want to test with the
automatic clamp jaw light (SC440 only).
The SC400 series clamp meters are built to
withstand the rigors of HVACR with high impact
plastic and a display you can read in hot or
cold environments. Move from a cold freezer
to a hot roof top and get accurate temperature
measurements that lesser thermometers can
not measure properly.
Controls
Rotate dial to the function you want to use.
OFF
VAC
VAC
%
NCV
V
DC
µADC
MFD
H
Z
AAC
50
HZ
AAC
400
°F
°C
H
Z
SC640
AUTO OFF
TYPE K
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
Cycle through parameters
within VAC/AAC/Hz and Ω/
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
/
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
switch positions.
OFF
VAC
VAC
%
NCV
V
DC
µADC
MFD
H
Z
AAC
50
HZ
AAC
400
°F
°C
H
Z
SC640
AUTO OFF
TYPE K
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
Illuminate backlight (SC440).
OFF
VAC
VAC
%
NCV
V
DC
µADC
MFD
H
Z
AAC
50
HZ
A
AC
400
°F
°C
H
Z
SC640
AUTO OFF
TYPE K
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
Activate inrush current and scroll
through dierent inrush ranges (SC440).
OFF
VAC
VAC
%
NCV
V
DC
µADC
MFD
H
Z
AAC
50
HZ
A
AC
400
°F
°C
H
Z
SC640
AUTO OFF
TYPE K
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
Manually select a range.
OFF
VAC
VAC
%
NCV
V
DC
µADC
MFD
H
Z
AAC
50
HZ
AAC
400
°F
°C
H
Z
SC640
AUTO OFF
TYPE K
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
Freeze the display.
Fieldpiece
Essential
Clamp
Meters
OPERATOR'S
MANUAL
Models SC440 SC420
Display
Battery Life (replace 9V if blinking)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Auto Power O Enabled
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
High Voltage Warning (>30VAC/VDC)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Manual Range (RNG) Mode
Data Hold Mode
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Inrush Amps Mode (Model SC440)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Continuity Test
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Diode Test
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Frequency Test (hertz)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Resistance Test (ohms)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Capacitance Test (farads)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Duty Cycle Test (percentage)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Micro Unit (10
−6
, one millionth)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Milli Unit (10
−3
, one thousandth)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Kilo Unit (10
3
, one thousand)
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
HOLD
INRUSH
Mega Unit (10
6
, one million)
Safety Information
Never ground yourself when taking electrical
measurements. Do not touch exposed metal
pipes, outlets, xtures, etc., which might be
at ground potential, while taking measure-
ments. Keep your body isolated from ground
by using dry clothing, rubber shoes, rubber
mats, or any approved insulating material.
Disconnect the test leads before opening the
case. Inspect the test leads for damage to the
insulation or exposed wire. Replace if suspect.
Keep your ngers behind the nger guards
on the probes while taking measurements.
When disconnecting from a circuit, disconnect
the “RED” lead rst, then the common “BLACK”
lead. Use one handed testing when possible.
Work with others.
Turn o power to the circuit under test before
cutting, unsoldering, or breaking the circuit.
Do not measure resistance (ohms) when circuit
is powered. Isolate load by disconnecting
from circuit.
Disconnect the meter from circuit before turning
any inductor o, including motors, transform-
ers, and solenoids. High voltage transients
can damage the meter beyond repair.
Do not use during electrical storms.
Do not apply more than rated voltages between
input and ground.
Isolate capacitors from system and discharge
them safely before testing.
Temperature switch prevents leaving thermo-
couple plugged in while measuring voltage.
When measuring high frequency AC current, do
not exceed the rated 400AAC of the clamp.
Failure to adhere may cause the clamp to heat
up dangerously.
All voltage tests: All voltage ranges will
withstand up to 600V. Do not apply more than
600VDC or AC rms.
Symbols used:
Caution, risk of electric shock
Caution, refer to manual.
Ground
Double insulation
Specifications
Display: 5000 count dual display
Backlight: 60 second duration with auto-o. Blue color. SC440 only.
Overrange: (OL) or (-OL) is displayed
Measurement rate: 3.3 times per second, nominal
Zero: Automatic
Operating environment: 32°F to 122°F (0°C to 50°C) at <70%
relative humidity
Storage temperature: -4°F to 140°F (-20°C to 60°C), 0 to 80% RH
(with battery removed)
Accuracy: Stated accuracy @ 73°F±9°F (23°C±5°C), <75%RH
Temperature coecient: 0.1 x (specied accuracy) per °C [0°C to
19°C (32°F to 66°F), 28°C to 50° C(82°F to 122°F)]
APO (Auto Power O): Approx. 30 minutes
Power: Single standard 9-volt battery, NEDA 1604, JIS 006P, IEC 6F22
Battery life: 200 hours typical alkaline (SC420); 100 hours typical
alkaline (SC440)
Low battery indication: Battery icon blinks and "LO.bt" is displayed
when the battery voltage drops below the operating level
Dimensions: 233mm(H) x 79mm(W) x 45mm(D)
Weight: Approx. 315g including battery
Altitude: Up to 6562 ft (2000m)
Overload protection: 600 VDC or 600VAC rms unless otherwise
stated
Test leads: Use UL listed test leads that comply to UL61010-031
rated CATIII 600V or above. Included test leads are gold-plated
and have removeable safety caps.
Please operate the instrument following all instructions
of the operator's manual to avoid impairing the safety
of the product.
Functions
Temperature (°F/°C)
Plug any Type K thermocouple directly into the meter to measure
temperature. Cold junction is located inside the meter and allows for
extremely accurate measurements even in rapidly changing ambient
temperatures (going from rooftop to freezer). No adapter is required.
Range: -30°F to 932°F, (-35°C to 500°C) Resolution: 0.1°
Accuracy: ±(1°F)* 32°F to 120°F, ±(1°C) 0°C to 49°C
±(1%+2°F) 32°F to 572°F, ±(1%+1°C) 0°C to 300°C
±(2%+6°F) -30°F to 32°F, ±(2%+3°C) -35°C to 0°C
±(2%+6°F) 572°F to 932°F, ±(2%+3°C) 300°C to 500°C
Sensor type: Type K thermocouple *After eld calibration
Overload protection: 30 VDC or 30VAC rms
Non Contact Voltage (NCV)
Use NCV to check 24VAC from a thermostat or live voltage up to
600VAC. Always test a known live source before using. A segment graph
and RED LED will display the presence of voltage. Audible beep increases
from intermittent to continuous as intensity of eld (EF) increases.
AC Voltage Detection Range: 24VAC to 600VAC (50-60Hz)
Voltage AC (VAC) (50Hz-500Hz)
Test power lines (120, 220, 480), test 24V going to controls, and
test for transformer failure.
Ranges: 500mV, 5V, 50V, 500V, 600V Resolution: 0.1mV
Accuracy: ±(1.2% + 8) 500mV range (50-60Hz)
±(1.2%+8), 5V, 50V, 500V; ±(1.5% + 8) 600V range
True RMS: model SC440 only Crest factor: ≤ 3
Audio/Visual Hi-V indicator: >30VAC/VDC
Input impedance: >100MΩ (500mV), 10MΩ (5V),
9.1MΩ (50V-600V)
!
SC440
Fieldpiece
TRUE RMS
V
AC
NCV
MFD
H
Z
A
AC
°F°C
Select
RangeHold
%
V
DC
µA
DC
H
Z
TEMP
AUTO OFF
COM
TYPE K
30V
MAX
CAT III
600V
VAC
NCV
MFD
H
Z
AAC
°F°C
%
VDC
µADC
HZ
AUTO OFF
TYPE K
30V
MAX
COM
Unplug Leads and Slide
TEMP Switch to the Right
VAC
NCV
MFD
H
Z
AAC
°F°C
%
VDC
µADC
HZ
VAC
NCV
MFD
H
Z
AAC
°F°C
%
VDC
µADC
HZ
SC440
Fieldpiece
TRUE RMS
V
AC
NCV
MFD
H
Z
A
AC
°F°C
Select
Range Hold
%
V
DC
µA
DC
H
Z
TEMP
AUTO OFF
COM
K-TYPE
30V
MAX
CAT III
600V
VAC
NCV
MFD
H
Z
AAC
°F°C
%
VDC
µADC
HZ
!
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 °F°C. (Use
only Type K thermocouples)
DO NOT APPLY VOLTAGE TO THE JACKS when the rotary dial is on
microamps. Even low voltages can cause a current overload and
potentially harm the meter.
1
2
Summary of Contents
Page 1 - Fieldpiece
01060207030804090510Quick Start1. For electrical testing, connect test leads to "COM" and "+" jacks. 2. Rotate the dial to your d
Page 2 - Discharge Cap First!
11161217131814191520MicroAmps DC (µADC)Microamps for ame rectier diode test on a heater control. Connect leads between ame sensor probe and contr
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