Fieldpiece SC680 User manual

11
Fieldpiece
Job Link® System
Power
Clamp Meter
OPERATOR'S
MANUAL
Model SC680
+
INRUSH

32
Safety Information
Understand and follow operating instructions
carefully.
A Warning identifies conditions and procedures
that are dangerous to the user. A Caution identifies
conditions and procedures that can cause damage to
the Product or the equipment under test.
!
WARNING
To avoid possible electric shock, personal injury or
death, follow these guidelines:
• Use the meter only as specified in this manual;
otherwise, the protection provided by the meter
may be impaired.
• Do not use if meter appears damaged. Visually
inspect the meter to ensure case is not cracked
and back case is securely in place.
• Inspect and replace leads if insulation is damaged,
metal is exposed, or probes are cracked. Pay
particular attention to the insulation surrounding
the connectors.
• Do not use meter if it operates abnormally as
protection maybe impaired.
• Use only correct measurement category (CAT),
voltage, and amperage rated probes, test leads,
and adapters for the measurement.
• Do not use this meter to verify the presence of
hazardous voltages on circuits that may have
voltages generated from frequencies above
1000Hz as the low pass filter limits voltage
measurements to below 1000Hz.
• Do not use during electrical storms or in wet
weather.
• Do not use around explosive gas, dust, or vapor.
• Do not apply more than the rated voltage to,
as marked on the meter, between terminals or
between any terminal and earth ground.
• Do not use without the battery and the back case
properly installed.
• Replace battery as soon as battery indicator
appears to avoid false readings.
• Remove the test leads from the circuit prior to
removing battery cover.
• Do not attempt to repair this unit as it has no
user-serviceable parts.
• Temperature switch prevents leaving
thermocouple plugged in while measuring
voltage.
• Do not measure current while the test leads are
in the input jacks.
• When measuring high frequency AC current,
do not exceed the rated 600AAC of the clamp.
Failure to adhere may cause the clamp to heat
up dangerously.
• Do not use the HOLD function to measure
unknown potentials. When HOLD is turned on,
the display does not change when a different
potential is measured.
• Do not use in CAT III or CAT IV environments with
the protective cap of test probe. The protective
cap decreases the exposed probe metal <4mm.
This decreases the possibility of arc flash from

54
short circuits.
• Do not place magnet inside Category IV panel.
Place it outside the panel instead.
!
CAUTION
To protect yourself, think “Safety First”:
• Voltages exceeding 30VAC or 60VDC pose a shock
hazard so use caution.
• Use appropriate personal protective equipment
such as safety glasses, face shields, insulating
gloves, insulating boots, and/or insulating mats.
• Disconnect circuit power and discharge all high-
voltage capacitors before testing resistance,
continuity, diodes, or capacitance.
Before each use:
• Perform a continuity test by touching the test
leads together to verify the functionality of the
battery and test leads.
• Use the 3 Point Safety Method. (1) Verify meter
operation by measuring a known voltage. (2)
Apply meter to circuit under test. (3) Return to
the known live voltage again to ensure proper
operation.
• Use the proper terminals, functions and range for
your measurements.
• Never ground yourself when taking electrical
measurements.
• Connect the black common lead to ground
or neutral before applying the red test lead to
potential voltage. Disconnect the red test lead
from the voltage first.
• Always work with a partner.
• Keep fingers behind the finger guards on the
probes.
All voltage tests: All voltage ranges will
withstand up to 1000VDC/750VAC rms. Do not
apply more than 1000VDC or 750VAC 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 APPLYVOLTAGE greater than 30VAC/VDC to the
thermocouple or the jacks when the rotary dial is on °F°C. (Use
only Type K thermocouples)
DO NOT APPLYVOLTAGETOTHE JACKS when the rotary dial is on
microamps. Even low voltages can cause a current overload and
potentially harm the meter.
!

76
Description
Your SC680 is the top of the line clamp meter with
wireless functionality for the HVACR professional. Send
your electrical measurements directly to the Job Link®
System mobile app. Leave the meter behind a closed
blower door and view the current measurement on your
mobile device.
Help determine system efficiency by directly
measuring power consumption (W) of the system. Use
this value to inform your customer of energy saving
measures you can take to help them save money on
their energy bills.
The SC680 is the only meter you’ll need for
troubleshooting mini-split systems. Dual Type K
temperature ports to measure entering/exiting air
temperatures and measure frequency (Hz) directly with
clamp jaw. Reach those cramped mini-split connectors
with the included RCT2 probe tips for voltage and
resistance measurements.
Hang your SC680 clamp meter to any metallic surface
with the heavy-duty magnet.When the job is done, store
your test leads in the back case for tidy and convenient
storage. See both voltage and amperage readings at the
same time on the large dual display.
Easily see your amperage readings no matter how you
clamp around a wire with the swivel head AAC clamp.
Verify the order of 3-phase voltage lines with just two
leads. Capture L1-L2 and L1-L3 to check that motor lines
are correctly installed with Phase Rotation test.
Take more accurateVAC and AAC readings on variable
frequency drives with True RMS sensing technology.
Measure the starting amp draw of a compressor with
Inrush current mode.
Illuminate the way with a powerful LED built into the
clamp jaw. Easily see your measurements with the bright
blue backlight on the display. Safely change functions
with the backlit illuminated dial.
Take measurements more safely with one hand
using the single test lead holder. Test leads come with
removable gold plated tips to reliably connect Fieldpiece
accessory heads.
What’s Included
• SC680 Job Link® System Power Clamp Meter
• ADLS2 Deluxe Test Leads Kit
• ASA2 Alligator Clips
• RCT2 Molex Probe Tips
• 2 ATB1 Type K Thermocouples
• 2 Velcro Straps
• 9V Alkaline Battery (Not installed)
• ANC7 Protective Padded Case
• Operator’s manual
Quick Start
1. Forelectricaltesting,connecttestleadstoblack "COM"
and red "+" jacks.
2. Rotate the dial to your desired measurement.
3. Connect to test points and read measurement.
4. For temperature testing, remove test leads, slideTEMP
switchtothe rightand connectTypeK thermocouples.

98
Measurements Dial
The SC680 is loaded with the measurement
parameters essential for HVACR professionals.
Select the parameter on the dial you want to
measure with the rotating selector switch.
Buttons
Illuminatebacklight.Pressfor1secondto
zero Amps DC
Activate Inrush AAC capture mode
ActivatewirelesstoconnecttoJob Link®
System mobile app
ActivateandcyclethroughHold,Maximum,
minimum,andreal-timemeasurements
(Press for 1 second to clear and exit)
Deactivate autoranging and select the
range manually
Cycle through displayed values on
applicable switch positions (Press for 1
second to toggle °F and °C)
TRUE RMS AUTO OFF
TYPE K 30V MAX
T1
L1 L2
L3
T2
Sync
OFF
Range Select H/M/m
SC660
ZERO A
DC
°F °C
TEMP
CAT III
600V
COM
INRUSH
TRUE RMS AUTO OFF
TYPE K 30V MAX
T1
L1 L2
L3
T2
Sync
OFF
Range Select H/M/m
SC660
ZERO A
DC
°F °C
TEMP
CAT III
600V
COM
INRUSH
TRUE RMS AUTO OFF
TYPE K 30V MAX
T1
L1 L2
L3
T2
Sync
OFF
Range Select H/M/m
SC660
ZERO A
DC
°F °C
TEMP
CAT III
600V
COM
INRUSH
TRUE RMS AUTO OFF
TYPE K 30V MAX
T1
L1 L2
L3
T2
Sync
OFF
Range Select H/M/m
SC660
ZERO ADC
°F °C
TEMP
CAT III
600V
COM
INRUSH
TRUE RMS AUTO OFF
TYPE K 30V MAX
T1
L1 L2
L3
T2
Sync
OFF
Range Select H/M/m
SC660
ZERO ADC
°F °C
TEMP
CAT III
600V
COM
INRUSH
+
INRUSH

1110
Display Icons
Battery Life Monitor
Auto Power Off Enabled
High Voltage Warning (>30VAC/VDC)
Manual Ranging
Data Hold
Maximum
Minimum
Inrush AAC
Wireless ON to Job Link® mobile app
Watts (Active Power)
Power Factor
Reactive Power
Apparent Power
Temperature Inputs
Delta T
Fahrenheit / Celsius
Continuity Test
Diode Test
Frequency (Hertz)
Duty Cycle (percentage)
Resistance Test (Ohms)
Capacitance Test (farads)
Microamps DC
Nano Unit (10−9, one billionth)
Micro Unit (10−6, one millionth)
Milli Unit (10−3, one thousandth)
Kilo Unit (103, one thousand)
Mega Unit (106, one million)
Alternating Current
Direct Current
Easy to Read Display
Easily see your measurements on the large dual
display. You’ll never miss a reading no matter the
lighting with the bright blue backlight to illuminate
the way.

1312
Measurement Dial
Volts AC (VAC) True RMS (50-400Hz)
Test power lines (120 to 480VAC), test 24VAC going to controls and test
for transformer failure.
Ranges: 1000mV, 10V, 100V, 750V Resolution: 0.1mV
Accuracy: ±(1.5% + 10) 50Hz to 60Hz
±(2.0% + 10) 60Hz to 400Hz
Unspecified at 400Hz and greater
Minimum Input Voltage Range: >20 digits
Low Pass Filter: >1 kHz
Crest Factor: ≤ 3
Audio/Visual Hi-V Indicator: >30VAC/VDC
Input Impedance: 5MΩ
Overload Protection: 1000VDC or 750VAC rms
Volts DC (VDC)
Select VDC and measure DC voltages on circuit boards on more
advanced HVACR systems and logic control boards. In VDC/ADC dial
position, VDC is shown on lower display. Press SELECT button to show ADC
on the top display at the same time.
Ranges: 1000mV, 10V, 100V, 1000V Resolution: 0.1mV
Accuracy: ±(0.5% + 5)
Input Impedance: 5MΩ
Overload Protection: 1000VDC or 750VAC 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. An audible beep increases from
intermittent to continuous as intensity of field (EF) increases.
AC Voltage Detection Range: 24VAC to 600VAC (50-60Hz)
+

1514
Amps AC (AAC) True RMS (50-60Hz)
Test isolated power lines. Press SELECT onVAC/100AAC/Hz or
VAC/600AAC/Hz position. Read AAC in upper display and VAC on the lower
display. For AC current <100AAC, select VAC/100AAC/Hz switch position
and for AC current >100AAC, select the VAC/600AAC/Hz switch position.
Range: 100A, 600A Resolution: 0.01A Crest factor: ≤ 3
Accuracy: ±(2.5% + 15) 100A, ±(2.0% + 10) 600A
Minimum Input Current Range: >20 digits
Overload Protection: 600AAC Jaw Opening: 1.2in (30 mm)
Frequency (Hz) Through Clamp
Measure Hz on variable frequency drive motors.Turn dial to either
VAC/100AAC/Hz or VAC/600AAC/Hz position and press SELECT twice. Hz
will show in upper display andVAC on the lower display at the same time.
Range: 10Hz to 400Hz Resolution: 0.1Hz
Accuracy: ±(0.1% + 5)
Minimum current range: >7AAC (10 to 100Hz); >20AAC (100 to
400Hz) on 100AAC range; >25AAC (10 to 400Hz) on 600AAC range.
Overload Protection: 600AAC
Amps DC (ADC)
Measure ADC through the clamp jaw. Press
TRUE RMS AUTO OFF
TYPE K 30V MAX
T1
L1 L2
L3
T2
Sync
OFF
Range Select H/M/m
SC660
ZERO A
DC
°F °C
TEMP
CAT III
600V
COM
INRUSH
for 1 second to zero
the ADC value in the top display.
Ranges: 100A, 600A Resolution: 0.01A Jaw Opening: 1.2in (30 mm)
Accuracy: ±(2.5% + 15) 100A, ±(2.0% + 10) 600A
Overload Protection: 600ADC
+
Amps AC (AAC), Frequency (Hz) through the clamp and Inrush AAC current
is measured in theVAC/100AAC/Hz orVAC/600AAC/Hz switch position
shown above.
Inrush AAC Current
Inrush mode captures the starting amp draw of a motor. Starting amp
draw can assist in diagnosing a motor before it fails.
Activate Inrush mode
1 Rotate selector switch to VAC/100AAC/Hz or VAC/600AAC/Hz
2 Press SELECT once to show AAC on upper display. Press INRUSH on the
right side of meter to activate Inrush Mode.
3 Clamp jaw around the motor’s start wire.
4 Turn motor on. The starting amp draw will hold on the upper display.
5 Press INRUSH to clear captured reading. Press INRUSH for 2 seconds to
exit.
Inrush measurement period: 100-milliseconds
Minimum input: >2A on 100AAC range; >20A on 600A range
!
Note: AAC or Hz through the clamp and VAC through the test leads
can be measured simultaneously. However, if only AAC, Frequency
(Hz), or Inrush AAC is measured through the clamp, test leads and
thermocouples must be unplugged from the meter.
+

1716
MicroAmps DC (µADC)
Test flame rectifier diodes on a heater control. Connect leads between
flame sensor probe and control module.Turn heating unit on. When the
flame is on, there should be a measurable µADC signal, typically under
10µADC. Compare measurement to manufacturer’s specification to
determine if replacement is necessary.
Ranges: 1000µA Resolution: 0.1µA
Accuracy: ±(1.0% + 5) Volts burden: 5V
Overload Protection: 600VDC or 600VAC rms
Frequency (Hz) Through Leads
Check incoming voltages to ensure they are cycling at 60Hz. For
frequency measurements onVFD equipment, use the amp clamp.
Ranges: 100Hz, 1000Hz, 10kHz, 100kHz, 1000kHz Resolution: 0.01Hz
Accuracy: ±(0.1% + 5) Sensitivity: 10Hz to 1000kHz: >3.5Vrms
Minimum PW: >1µs Duty Cycle Limits: >30% and <70%
Overload Protection: 600VDC or 600VAC rms
Duty Cycle (%)
Duty cycle shows the % OnTime of a 5V logic signal square wave.
Ranges: 5%-95% (40Hz to 1kHz), 10%-90% (1kHz to 10kHz), 20%-80%
(10kHz to 20kHz)
Accuracy (5V logic): ±(2% + 10) Resolution: 0.1%
Pulse Width: >10µs
Overload Protection: 600VDC or 600VAC rms
Capacitance (MFD)
Test motor start and run capacitors. Capacitors are one of the most
failure prone components in a HVACR system. Disconnect from power and
any resistors found between terminals. Discharge capacitor before testing. If
dIS.C is displayed, the capacitor needs to be fully discharged to test.
Ranges: 10nF, 100nF, 1000nF, 10µF, 100µF, 1000µF, 10mF
Accuracy: ±(3% + 15) 10nF, ±(3% + 5) 100nF to 1000µF, ±(5% + 5) 10mF
Resolution: 0.01nF Overload Protection: 600VDC or 600VAC rms Discharge Cap First!

1918
Resistance (Ω)
Used for“ohming out”a compressor. A 0.01Ω resolution is useful to
test the resistance between the terminal poles because the values are
typically very low. For best practice, use a megger (Fieldpiece SMG5) to
measure motor winding insultion to ground.
Ranges: 100Ω, 1000Ω, 10kΩ, 100kΩ, 1000kΩ, 10MΩ, 50MΩ
Resolution: 0.01Ω
Accuracy: ±(1.0% + 15) 100Ω, ±(1.0% + 5) 1000Ω to 100kΩ, ±(1.5%
+ 5) 1000kΩ, ±(3.0% + 5) 10MΩ to 50MΩ
Open circuit volts: -1.1VDC typical, -3.2VDC (100Ω range)
Overload Protection: 600VDC or 600VAC rms
Continuity (
OO
FF
FF
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
)
Perfect for checking isolated fuses, use the continuity function to test
whether a circuit is open (no beep, no green LED) or closed (beep and
green LED). Press SELECT once to enter Continuity mode.
Range: 100Ω Resolution: 0.01Ω Response time: 100ms
Audible beep: <30Ω
Visual Indicator: Green LED
Overload Protection: 600VDC or 600VAC rms
Diode Test (
OO
FF
FF
M FD NCV
V
AC VDC
AAC
Hz
Hz
%
°C
°F
SC56
AUTO OFFTRUE RMS
CAT III
600V
TEMP K-TYPE
30V
MAX
SEL
HOLD
INRUSH
)
Test diodes for proper forward and reversed-biased functions. A
voltage will display in forward-bias and“OL”in reversed-bias. Press SELECT
twice to enter Diode mode.
Test current: 0.8mA (Approx.) Accuracy: ±(1.5% + 5)
Open circuit volts: 3.2VDC typical Audible beep: <0.05V
Visual Indicator: Green LED
Overload Protection: 600VDC or 600VAC rms