OFF
VAC
VAC
%
NCV
V
DC
µADC
MFD
H
Z
AAC
50
HZ
A
AC
400
°F
°C
H
Z
Select
INRUSH
VAC
%
V
DC
H
Z
AAC
HZ
AAC
400
H
Z
INRUSH
OFF
VAC
VAC
%
NCV
V
DC
µADC
MFD
H
Z
AAC
50
HZ
AAC
400
°F
°C
H
Z
Select
Range Hold
INRUSH
TRUE RMS
VAC
VAC
%
V
DC
µADC
H
Z
AAC
50
HZ
AAC
400
H
Z
INRUSH
Fieldpiece
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
SC56
SEL
HOLD
INRUSH
O
F
F
M
FD
NCV
VAC
VDC
AAC
Hz
Hz
%
°C
SC56
SEL
HOLD
INRUSH
O
F
F
FD
NCV
VAC
VDC
AAC
Hz
Hz
SC56
SEL
HOLD
INRUSH
NCV
VAC
VDC
AAC
Hz
SEL
HOLD
INRUSH
SEL
HOLD
INRUSH
HOLD
INRUSH
HOLD
INRUSH
NCV
SEL
HOLD
INRUSH
O
F
F
NCV
VAC
VDC
AAC
Hz
SEL
HOLD
INRUSH
HOLD
INRUSH
HOLD
INRUSH
O
F
F
NCV
VAC
VDC
AAC
Hz
SC56
SEL
HOLD
INRUSH
NCV
VDC
SEL
HOLD
INRUSH
NCV
VDC
AAC
Hz
SEL
HOLD
INRUSH
!
OFF
V
AC
V
AC
%
NCV
V
DC
µA
DC
MFD
H
Z
A
AC
50
H
Z
A
AC
400
°F
°C
H
Z
SC640
AUTO OFF
TYPE K
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
OFF
V
AC
V
AC
%
NCV
V
DC
µA
DC
MFD
H
Z
A
AC
50
H
Z
A
AC
400
°F
°C
H
Z
SC640
AUT
O OFF
K-TYPE
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
!
Loaded
Clamp
Meters
OPERATOR'S
MANUAL
Models SC640 SC620
99 Washington
Street Melrose,
MA 02176
TestEquipmentDepot.com
01
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.
02
Description
The SC600 series are the new loaded clamp
meters for the HVACR professional. Hang your
SC600 series clamp meter to any metallic surface
with the redesigned heavy-duty magnet and
conveniently store your test leads when the
job is done. See both voltage and amperage
readings at the same time on the big dual LCD
display, even in low light conditions using the
bright blue backlight (backlight SC640 only).
Easily see your amperage readings no matter
how you clamp around a wire with the swivel
head AAC clamp.
Take more accurate VAC and AAC readings on
variable frequency drives with True RMS sensing
technology (SC640 only). Measure the starting
amp draw of a compressor with Inrush current
feature (SC640 only). Use the clamp jaw light to
easily light up the test area. (SC640 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.
The SC600 series clamp meters are built to
withstand the rigors of HVACR with high impact
plastic and a display you can read in very hot or
very cold environments.
03
Controls
Z
H
OFF
50
AAC
HZ
VAC
400
NCV
MFD
°F
°C
Rotate dial to the function you want to use.
Press to cycle Amps AC and frequency
within VAC/AAC/Hz switch position.
Press to illuminate backlight (SC640).
Press to activate inrush current
INRUSH
capture mode (SC640).
Press to manually select a range.
Press to freeze the display.
04
VAC
µADC
AAC
DC
V
Z
H
%
Display
Battery Life (replace 9V if blinking)
Auto Power O Enabled
High Voltage Warning (>30VAC/VDC)
Manual Range (RNG) Mode
Data Hold Mode
Inrush Amps Mode (SC640)
Continuity Test
Diode Test
Frequency Test (hertz)
Resistance Test (ohms)
Capacitance Test (farads)
Duty Cycle Test (percentage)
Micro Unit (10−6, one millionth)
Milli Unit (10−3, one thousandth)
Kilo Unit (103, one thousand)
Mega Unit (106, one million)
05
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 measurements. 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.
When disconnecting from a circuit, disconnect
Keep your ngers behind the nger guards
on the probes while taking measurements.
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
06
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, 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.
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
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.
07
Specifications
Display: 5000 count dual display
Backlight: 60 second duration with auto-o. Blue color. SC640 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 (SC620); 100 hours typical
alkaline (SC640)
Low battery indication: Battery icon blinks and "LO.bt" is displayed
when the battery voltage drops below the operating level
Dimensions: 287.5mm(H) x 79.5mm(W) x 50.0mm(D)
Weight: Approx. 450g 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.
08
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 SC640 only Crest factor: ≤ 3
Audio/Visual Hi-V indicator: >30VAC/VDC
Input impedance: >100MΩ (500mV), 10MΩ (5V),
9.1MΩ (50V-600V)
09
10
NCV
MFD
NCV
MFD
OFF
°F
°C
OFF
°F
°C
TYPE K
COM
AUTO OFF
MAX
30V
Z
H
50
AAC
HZ
VAC
400
AAC
VAC
DC
V
Z
H
%
µADC
Z
H
50
AAC
VAC
400
VAC
H
µADC
Unplug Leads and Slide
TEMP Switch to the Right
HZ
AAC
DC
V
Z
%
MicroAmps DC (µADC)
SEL
HOLD
INRUSH
HOLD
INRUSH
!
HOLD
VAC
V
DC
HOLD
VAC
V
DC
VAC
%
V
DC
H
Z
AAC
HZ
A
AC
400
H
Z
INRUSH
VAC
%
V
DC
H
Z
AAC
HZ
AAC
400
H
Z
INRUSH
OFF
V
AC
V
AC
%
NCV
V
DC
µA
DC
MFD
H
Z
A
AC
50
H
Z
A
AC
400
°F
°C
H
Z
OFF
V
AC
V
AC
%
NCV
V
DC
µA
DC
MFD
H
Z
A
AC
50
H
Z
A
AC
400
°F
°C
H
Z
SC640
AUTO OFF
TYPE K
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
OFF
V
AC
V
AC
%
NCV
V
DC
µA
DC
MFD
H
Z
A
AC
50
H
Z
A
AC
400
°F
°C
H
Z
SC640
AUTO OFF
K-TYPE
30V
MAX
Select
Range Hold
INRUSH
COM
TRUE RMS
A
B
C
TEMP
CAL
DO NOT SWITCH
FROM J2
T1
Microamps for ame rectier diode test on a heater control.
Connect leads between ame sensor probe and control module and
turn heating unit on to read µA measurement. When the ame is on,
there should be a measurable µADC signal, typically under 10µADC.
Compare measurement to manufacturer’s specication to determine
if replacement is necessary.
Ranges: 500µA Resolution: 0.1µA
Accuracy: ±(1.0% + 2) Volts burden: 1V
Overload Protection: 600VDC or 600VAC rms
Frequency (Hz) Through Leads
Check incoming voltages to ensure they are cycling at 60Hz. For
frequency measurements on VFD equipment, use the amp clamp.
Ranges: 500Hz, 5kHz, 50kHz, 500kHz, 1MHz Resolution: 0.1Hz
Accuracy: ±(0.1% + 5) Sensitivity: 10Hz to 1MHz: >3.5Vrms
PW: >1µs Duty Cycle Limits: >30% and <70%
Duty Cycle (%)
Duty cycle shows the % On Time of a 5V logic signal square wave.
Ranges: 5%-95% (40Hz to 10kHz), 10%-90% (10kHz to 20kHz)
Accuracy (5V logic): ±(2% + 10) Resolution: 0.1% PW: >10µs
Overload Protection: 600VDC or 600VAC rms
Capacitance (MFD)
Set to MFD to test motor start and run capacitors. Capacitors
are one of the most failure prone components in a HVACR system.
Disconnect from power and resistors between terminals. Discharge
capacitor before testing. If dIS.C is displayed, capacitor is not
discharged completely.
Ranges: 5µF, 50µF, 500µF, 5mF Resolution: 1nF
Accuracy: ±(3% + 15) 5µF, ±(3% + 5) 50µF to 500µF, ±(5% + 20) 5mF
Overload Protection: 600VDC or 600VAC rms
11
12
NCV
MFD
NCV
MFD
NCV
MFD
OFF
°F
°C
OFF
°F
°C
OFF
°F
°C
50
VAC
µADC
50
VAC
µADC
50
VAC
µADC
H
AAC
H
AAC
H
AAC
Z
400
VAC
H
Z
400
VAC
H
Z
400
VAC
H
HZ
AAC
DC
V
Z
%
HZ
AAC
DC
V
Z
%
HZ
AC
A
DC
V
Z
%
Discharge Cap First!
Voltage DC (VDC)
Select VDC and measure DC voltages on circuit boards on more
advanced HVACR systems.
Ranges: 500mV, 5V, 50V, 500V, 600V Resolution: 0.1mV
Accuracy: ±(0.5% + 2)
Input impedance: >100MΩ (500mV), 10MΩ (5V),
9.1MΩ (50V-600V)
Resistance (Ω)
Used for “ohming out” a compressor motor. 0.1Ω resolution is
useful to test the resistance between the motor poles because the
values are typically very low.
Ranges: 500Ω, 5kΩ, 50kΩ, 500kΩ, 5MΩ, 50MΩ
Resolution: 0.1Ω Overload Protection: 600VDC or 600VAC rms
Accuracy: ±(1.0% + 5) 500Ω to 500kΩ, ±(1.5% + 5) 5MΩ, ±(3.0%
+ 5) 50MΩ
Continuity (
Use the continuity feature to test if a circuit is open or closed. Use
this feature to check fuses as well. A steady “beep” and green LED
indicate you have continuity.
Range: 500Ω Resolution: 0.1Ω Response time: 100ms
Audible beep: <30Ω Overload Protection: 600VDC or 600VAC rms
Diode Test (
Test diodes for proper forward and reversed-biased functions.
Test current: 0.8mA (Approx.) Accuracy: ±(1.5% + 5)
Open circuit volts: 3.2VDC typical Audible beep: <0.03V
Visual Indicator: Green LED
Overload Protection: 600VDC or 600VAC rms
13
)
)
14
MFD
MFD
NCV
MFD
MFD
NCV
NCV
NCV
OFF
°F
°C
OFF
°F
°C
OFF
°F
°C
OFF
°F
°C
Z
H
50
AAC
HZ
VAC
400
AAC
VAC
V
DC
Z
H
%
µADC
Amps AC (AAC) True RMS
Test any isolated power line. Press SELECT on VAC/AAC/Hz
position. Read AAC in upper display. True RMS on SC640 only.
Ranges: 50A, 400A Resolution: 0.01A Crest factor: ≤ 3
Accuracy: ±(2.0% + 10) 50-60Hz Jaw Opening: 1.2in (30 mm)
Frequency (Hz) Through Clamp
Measure Hz on variable frequency drive motors. Turn dial to VAC/
AAC/Hz and press SELECT twice. Hz will show in upper display.
Z
H
50
AAC
HZ
VAC
400
AAC
VAC
DC
V
Z
H
%
µADC
Range: 10Hz to 400Hz Accuracy: ±(0.1% + 5)
Minimum current range: > 5AAC Overload Protection: 400AAC
Resolution: 0.1Hz
Inrush Current (SC640 only)
Inrush feature captures starting current of a compressor motor.
Z
H
50
AAC
HZ
VAC
400
AAC
VAC
DC
V
Z
H
%
µADC
Z
H
50
AAC
HZ
VAC
400
AAC
VAC
V
DC
Z
H
%
µADC
Starting current can assist in diagnosing a motor before it fails.
To activate Inrush feature
1. Turn selector switch to VAC/50AAC/Hz or VAC/400AAC/Hz
2. Press SELECT to show AAC on upper display. Press INRUSH, on right
side of the meter, to activate.
3. Clamp meter around compressor start wire. Turn motor on. The
starting current will hold on the upper display.
4. Hold INRUSH for 2 seconds to exit Inrush feature or press and
release INRUSH to measure starting current again.
Inrush measurement period: 100-milliseconds
Minimum input: >2A on 50A range; >20A on 400A range
Note: AAC through the clamp and voltage through the test
leads can be measured simultaneously. However, if only AAC,
Frequency (Hz), or Inrush is measured through the clamp, test
leads and thermcouple must be unplugged from the meter.
15
Modular
Expandability
Your new Swivel Clamp Meter is compatible
with all Fieldpiece Accessory Heads. With
Fieldpiece Accessory Heads, you can measure
any available parameter, and read the
measurement on your new meter's display in
real-time.
Just set the range to VDC and press the
RANGE button until mV is displayed. Remove
the probe tips of your test leads, and connect
your accessory head (model AAV3 shown).
NCV
MFD
16
see all of the different accessory heads that
Fieldpiece offers.
Visit www.testequipmentdepot.com to
Z
H
OFF
50
AAC
VAC
400
VAC
H
%
µADC
°F
°C
HZ
AAC
DC
V
Z
AirVelocity
&Temperature
Head
English Metric
Ft/min M/s
ºF ºC
OFF
Temp. Calibration
For accuracies of ±1°F, calibrate thermocouple
to a known temperature. A glass of stabilized
ice water is very close to 32°F (0°C) and is usually
very convenient but any known temperature
can be used.
1. Select the °F °C range.
2. Plug thermocouple to be
calibrated into the Type K
jack.
3. Unscrew A and B and
remove the battery cover.
4. Stabilize a large cup of ice
water. Stir the ice with the
water until temperature
stays at a stable value.
5. Immerse the thermocouple
LCDX
100
ON
READLOBATT
Average
English
(16sec)
Real
Metric
time
KM/hrMPH
AUTOOFF
AAV3
probe and let it stabilize.
Keep stirring water to
prevent thermocouple from
direct contact with ice.
6. Use a small screwdriver
to adjust calibration pot C
below the battery as close to
32°F(0°C) as you would like.
Note: J1-J2 switch is for auto-
calibration purposes only. Do
not switch from J2.
17
Auto Power Off
Auto power o or APO will automatcially turn
o your meter after 30 minutes of inactivty. By
default it is activated and APO will show on the
display. To disable, turn meter o. Hold
Range
power on the meter by turning the selector dial
to any range. Release
Range
after the beep. APO will
no longer display over the battery icon.
Auto Hold
Press and hold
will beep and HOLD will blink on LCD. After 6
seconds the measurement on screen will freeze
automatically. Press
for two seconds. Meter
to exit this mode.
Battery Replacement
When your meter’s battery is low, the battery
icon will appear empty and blink for 30 seconds.
“LO.bt” will display and meter will power o.
Turn dial to OFF position, disconnect test
leads and remove the battery cover with magnet
strap on the back of your meter. Remove old
battery and replace with a standard 9V battery
only. Be sure to re-insert the magnet strip before
re-installing the battery cover.
18
and
Maintenance
Clean the exterior with a dry cloth. Do not
use liquid.
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 verication 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
tness 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.
19
Obtaining Service
Call Fieldpiece Instruments for one-pricefix-all out-of-warranty service pricing. Send
check or money order for the amount quoted.
Send the meter freight prepaid to Fieldpiece
Instruments. Send proof of date and location
of purchase for in-warranty service. The meter
will be repaired or replaced, at the option
of Fieldpiece, and returned via least cost
transportation.
For international customers, warranty for
products purchased outside of the U.S. should
be handled through local distributors.
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
© Fieldpiece Instruments, Inc 2014; v28
20
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