Fieldpiece SC420 SC440 Essential Clamp Meters - Manual (Page 2)

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MicroAmps DC (µADC)
Microamps for flame rectifier diode test on a heater control.
Connect leads between flame sensor probe and control module and
turn heating unit on to read µA measurement. 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: 500µA Resolution: 0.1µA
Accuracy: ±(1.0% + 2) Voltage 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
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. 0.1Ω resolution is necessary
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 (
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
HOLD
INRUSH
)
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. Press SELECT once.
Range: 500Ω Resolution: 0.1Ω Response time: 100ms
Audible beep: <30Ω Overload Protection: 600VDC or 600VAC rms
Diode Test (
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
HOLD
INRUSH
)
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
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 SC440 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.
Range: 10Hz to 400Hz Accuracy: ±(0.1% + 5)
Minimum current range: > 5AAC Overload Protection: 400AAC
Resolution: 0.1Hz
Inrush Current (SC440 only)
Inrush feature captures starting current of a compressor motor.
Starting current can assist in diagnosing a motor before it fails.
To activate Inrush feature
1. Turn selector switch to VAC/AAC/Hz
2. Press SELECT once to show AAC on upper display.
3. Press INRUSH once to select 50AAC range. Press INRUSH twice to
select 400AAC range.
4. Clamp meter around compressor start wire. Turn motor on. The
starting current will hold on the upper display.
5. 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.
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).
Visit www.fieldpiece.com to see all of the
different accessory heads that Fieldpiece offers.
Temp. Calibration
For accuracies of ±1°F, calibrate 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
probe and let it stabilize.
Keep stirring water to prevent
micro-environments.
6. Do not let the thermocouple
come in direct contact with
ice.
7. 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.
Auto Power Off
Auto power off or APO will automatcially turn
off your meter after 30 minutes of inactivty. By
default it is activated and APO will show on the
display. To disable, turn meter off. Hold
HOL
D
COM
CAT III
600V
Fieldpiece
Select
Range M/m
SC240
V AC NCV
A AC
°F°C V DC
MFD
TEMP
AUTO OFF
TYPE K 30V
MAX
and
power on the meter by turning the selector dial
to any range. Release
HOL
D
COM
CAT III
600V
Fieldpiece
Select
Range M/m
SC240
V AC NCV
A AC
°F°C V DC
MFD
TEMP
AUTO OFF
TYPE K 30V
MAX
after the beep. APO will
no longer display over the battery icon.
Auto Hold
Press and hold
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
for two seconds. Meter
will beep and HOLD will blink on LCD. After
6 seconds the measurement on screen will
freeze automatically. Press
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
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 off.
Turn dial to OFF position, disconnect test
leads and remove the battery cover with magnet
strap (SC440 only) 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.
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 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
Call Fieldpiece Instruments for one-price-
fix-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.
www.fieldpiece.com
© Fieldpiece Instruments, Inc 2014; v21
V AC
NCV
MFD
H Z
A AC
°F°C
%
V DC
µA DC
H Z
V AC
NCV
MFD
H Z
A AC
°F°C
%
V DC
µA DC
H Z
V AC
NCV
MFD
H Z
A AC
°F°C
%
V DC
µA DC
H Z
V AC
NCV
MFD
H Z
A AC
°F°C
%
V DC
µA DC
H Z
V AC
NCV
MFD
H Z A AC
°F°C
% V DC
µA DC
H Z O FF V A C V A C %
N C V
V D C µA D C
M FD
H Z A A C 50 H Z A A C 40 0 °F °C H Z SC6 4 0 AU TO O FF
TY PE K
30 V M AX
Se le ct Ra ng e
Ho ld INRU SH
C O M
TR UE R M S
V AC
NCV
MFD
H Z
A AC
°F°C
%
V DC
µA DC
H Z
Discharge Cap First!
SC440
Fieldpiec e
TRUE RMS
VAC
NCV MFD
HZ AAC
°F°C
Select
Range Hold
% VDC µADC HZ
TEMP
AUTO OFF
COM TYPE K 30V MAX
CAT III 600V
V AC
NCV
MFD
H Z
A AC
°F°C
%
V DC
µA DC
H Z
Air Velocity & Temperature Head English
READ LO BATT
ON LCD X 100
Average (16 sec)
Metric Real time
AAV3
AUTO- OFF
English Metric Ft/min M/s KM/hr MPH ºF ºC OFF
TEMP CAL
DO NOT SWITCH
FROM J2
A
B
C
V AC
NCV
MFD
H Z
A AC
°F°C
%
V DC
µA DC
H Z
V AC
NCV
MFD
H Z
A AC
°F°C
%
V DC
µA DC
H Z