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Quick Start
1. For electrical testing, connect test leads to
"COM" and "+" jacks. For temperature testing,
remove test leads and slide TEMP switch to
the right.
2. Rotate the dial to your desired function. Press
SEL to cycle through the parameters within
the switch position.
3. Connect to test points and read measurement
on display.
Certifi cations
UL 61010-1, Second Edition
IEC/EN61010-1
IEC/EN61010-2-032
EMC
EN61326-1
C-Tick
(N22675)
WEEE
CATIII 600V, class II and pollution degree 2
indoor use comply with CE, RoHS compliant.
Description
Your SC55 or SC56 is a swivel clamp multimeter
specifi cally designed for the HVAC/R technician.
The swivel on the SC55/SC56 allows you to
get a good viewing angle on the display while
taking amperage readings through the clamp,
regardless of wire orientation. The SC55 and
SC56 also contain the functions that are most
relevant for an HVAC/R technician.
The unique temperature circuit allows
the SC55/SC56 to get accurate temperature
readings faster when moving from a rooftop to
a freezer. The easily accessible fi eld calibration
allows you to calibrate the temperature on your
SC55/SC56 without hassle.
Inrush current (SC56) allows you to get a
reliable measurement of a motor's startup amp
draw. You can use the inrush measurement to
help diagnose a motor before it fails.
The jaw light (SC56) and backlight (SC56)
make it easier to use in any lighting condition.
True RMS (SC56) helps you take more accurate
voltage readings on variable frequency drives.
Controls
O
F
F
MFD
NCV
V
AC
V
DC
A
AC
Hz
Hz
%
°C
°F
Rotate dial to the function you want to use.
O
F
F
SEL
Press to cycle through parameters
within a dial position.
O
F
F
Press to illuminate backlight for 60 sec
O
F
F
INRUSH
Press to activate Inrush current
capture mode (SC56).
O
F
F
Press to manually select resolution.
O
F
F
HOLD
Press to freeze both displays (SC55).
Fieldpiece
Swivel
Clamp
Meter
OPERATOR'S
MANUAL
Models SC55 SC56
Display
O
F
F
Battery Life (replace 9V if blinking)
O
F
F
Auto Power Off Enabled
O
F
F
High Voltage Warning (+30V)
O
F
F
Manual Range (RNG) Mode
O
F
F
Data Hold Mode (Model SC55)
O
F
F
Inrush Amps Mode (Model SC56)
O
F
F
Continuity Test
O
F
F
Diode Test
O
F
F
Frequency Test (hertz)
O
F
F
Resistance Test (ohms)
O
F
F
Capacitance Test (farads)
O
F
F
Duty Cycle Test (percentage)
O
F
F
Micro Unit (10
−6
, one millionth)
O
F
F
Milli Unit (10
−3
, one thousandth)
O
F
F
Kilo Unit (10
3
, one thousand)
O
F
F
Mega Unit (10
6
, one million)
O
F
F
Safety Information
• Never ground yourself when taking electrical
measurements. Do not touch exposed metal
pipes, outlets, fi 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 fi ngers behind the fi nger guards on
the probes while taking measurements.
• When disconnecting from a circuit, disconnect
the “RED” lead fi rst, then the common “BLACK”
lead. Use one handed testing when possible.
Work with others.
• Turn off power to the circuit under test be-
fore 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 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.
• Do not apply more than rated voltages between
input and ground.
• Isolate capacitors from system and discharge
them safely before testing.
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
Specifi cations
Display:
5000 count dual display with backlight
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 coeffi
cient:
0.1 x (specifi ed 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 Off ):
Approx. 30 minutes
Power:
Single standard 9-volt battery, NEDA 1604, JIS 006P, IEC 6F22
Battery life:
200 hours typical alkaline (SC55); 100 hours typical
alkaline (SC56)
Low battery indication:
Battery icon blinks and "LO.bt" is displayed
when the battery voltage drops below the operating level
Dimensions:
258.3mm(H) x 71.2mm(W) x 42.7mm(D)
Weight:
Approx. 278g including battery
Overload protection:
600 VDC or 600VAC rms unless otherwise
stated
Test leads:
Use the test leads that are supplied with the meter or UL
listed test leads rated CATIII 600V or above.
Please operate the instrument following all instructions
of the operator's manual to avoid imparing safety of the
product.
Functions
Temperature (°F/°C)
Plug any K-type thermocouple directly into the meter to measure
temperature. Cold junction is located “inside meter” and allows for
extremely accurate measurements even in rapidly changing ambient
temperatures (going from rooftop to freezer). No adapter is required.
See Temp Calibration section for calibration instructions.
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:
K-type thermocouple
Overload protection:
30 VDC or 30VAC rms
Non Contact Voltage (NCV)
Use the non contact voltage (NCV) feature to test if a wire is hot
or not. Always test on a known live source before using. A three
segment graph will show intensity of fi eld (EF) detected. A red LED
blinks when beeping sound is emitted at >24VAC
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 SC56 only
Crest factor:
≤ 3
Input impedance:
>100MΩ (500mV), 10MΩ (5V),
9.1MΩ (50V-600V)
O
F
F
MFD
NCV
V
AC
V
DC
A
AC
Hz
Hz
%
°C
°F
AUTO OFF
TRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
Unplug Leads and Slide
TEMP Switch to the Right
O
F
F
MFD
NCV
V
AC
V
DC
A
AC
Hz
Hz
%
°C
°F
SEL
RNG
O
F
F
MFD
NCV
V
AC
V
DC
A
AC
Hz
Hz
%
°C
°F
!
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. (Use
only k-type thermocouples)
REMOVE THE THERMOCOUPLE when taking voltage measurements.
DISCONNECT TEST LEADS when measuring temperature.
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.
O
F
F
MFD
NCV
V
AC
V
DC
A
AC
Hz
Hz
%
°C
°F
SC56
AUTO OFF
TRUE RMS
CAT III
600V
TEMP
K-TYPE
30V
MAX
SEL
IN
O
F
F
!
99 Washington Street
Melrose, MA 02176
Phone
781-665-
1400
Toll Free 1-800-517-8431
