Fieldpiece SC76 User Manual

OPERATOR’S MANUAL
Works with Fieldpiece
accessory heads!
AUTO RANGING
DIGITAL CLAMP
METER Model SC76
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 thermocou-
ple or the jacks when the rotary dial is on
°F.
REMOVE
THE THERMOCOUPLE
when taking voltage measurements.
DISCONNECT
THE TEST LEADS
when taking temperature measure-
ments.
DO NOT APPLY VOLTAGE TO THE
JACKS when the rotary dial is on
microamps. Even low voltages can cause
a current overload and blow the fuse.
Replace blown fuse to regain function.
!
Maintenance
Clean the exterior with clean dry
cloth. Do not use liquid.
Battery replacement: When the
multimeter displays " " the battery
must be replaced. Disconnect and
unplug leads, turn meter off, and
remove the battery cover. Replace the
battery with a NEDA type 1604 9V bat-
tery.
For your safety...
General: Disconnect the test leads
before opening the case. Inspect the
test leads for damage to the insulation
or exposed metal. Replace if suspect.
Never ground yourself when taking
electrical measurements. Do not touch
exposed metal pipes, outlets, fixtures,
etc., which might be at ground poten-
tial. Keep your body isolated from
ground by using dry clothing, rubber
shoes, rubber mats, or any approved
insulating material. When disconnect-
ing from a circuit, disconnect the
"RED" lead first, then the common
lead. Work with others. Use one hand
for testing. Turn off power to the circuit
under test before cutting, unsoldering,
or breaking the circuit. Keep your fin-
gers behind the finger guards on the
probes. Do not measure resistance
when circuit is powered. Do not apply
more than rated voltage between input
and ground.
All voltage tests: For model SC76
all voltage ranges will withstand up to
600VDC or 600VAC. Do not apply
more than 600VDC or 600VAC.
AC tests: Disconnect the meter
from the circuit before turning any
inductor off, including motors, trans-
formers, and solenoids. High voltage
transients can damage the meter
beyond repair. Do not use during elec-
trical storms.
Symbols used:
Caution, risk of electric shock
Caution, refer to manual.
Ground
Double insulation
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, alter-
ation, or unreasonable use of the
instrument.
Any implied warranties arising from
the sale of a Fieldpiece product,
including but not limited to implied war-
ranties 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 limita-
tions or exclusions may not apply to
you.
!
Works with Fieldpiece
accessory heads
Connect your Fieldpiece accessory
head to SC series meter through
included deluxe silicone leads. Use
340mVDC or 3400mVDC range for
most heads.
SC76 connected to
ARH4 through leads.
Available Fieldpiece
accessory heads
There is a Fieldpiece accessory
head available for just about any job.
There are heads to measure tempera-
ture, RH%, wet bulb, dew point, vacu-
um (microns of mercury), manometer
(inches of water column), amps
AC&DC, high voltage, CO, CO2, air
velocity, and many more.
Non-contact voltage
With the NCV tab on the tip of the
clamp close to an AC voltage, press
the NCV button. The NCV LED will
light and the beeper will beep. The
NCV function is sensitive enough to
detect 24VAC on thermostats.
Hi voltage indicator
In any VAC/VDC range, when you
touch a voltage greater than 30V, the
beeper will beep and the red Hi-V LED
will blink. BE CAREFUL!
Current measurements
The fixed jaw is longer than the
moveable jaw to make it easier to
select just one wire from a bundle.
With the jaws closed, separate one
wire using the long fixed jaw. Slide it to
the corner where the two jaws meet.
Then open the jaws to let it in. You can
select the wire without having to hold
the jaws open.
Microamps
For measuring the flame diode cur-
rent in a heater control.
Capacitance
For motor-start and motor-run
capacitors. Disconnect the capacitor
from power first. Short the terminals to
discharge the capacitors. Disconnect
any resistors that might be between
the terminals of the capacitor.
Temperature
Plug any K-type thermocouple
directly into the meter to measure tem-
perature. Temperature measurement
will maintain good accuracy in fast
changing environments. One thermo-
couple is included. No adapter is
required.
Display ºC or ºF
Remove back of meter, locate
jumper on lower right corner of PCB
(just below VR3) and close jumper to
read temperature in °C.
Field ºF calibration
For accuracies of ±1°F calibrate the
SC76 to a known temperature. A glass
of stabilized ice water is very close to
32°F and is usually very convenient.
1. Select the °F range on the SC76.
2. Remove back case. Hold the bat-
tery in place with a rubber band.
3. Stabilize a large cup of ice water.
4. Immerse the probe and let it stabi-
lize.
5. Adjust VR3 (lower right corner of
PCB) to get close to 32°F then
adjust VR4 (below VR3) to get
within 0.1°F of 32°F.
6. To calibrate in °C, close the jumper
that is to the left of VR3.
Using & storing test leads
Because the wire insulation is sili-
cone they will stay flexible in cold
weather and will not melt if bumped by
a soldering iron.
Use the single test probe holder on
clamp to make voltage testing easy.
For convenient lead storage, wrap
the leads as shown.
Opman SC76 v11
!

Fieldpiece SC76 Specifications

Display

display type	LCD
analog bar graph segments	34
measurement rate	20 times per second

Operating Environment

operating temperature	32°F to 122°F
storage temperature	-4°F to 140°F
altitude	6561.7 Feet

Power

power source	9-volt battery
battery life	300 hours
auto power off	Approx. 10 minutes

Voltage Measurement

DC voltage ranges	340mV, 3400mV, 34V, 340V, 600V
DC voltage resolution	0.1mV
AC voltage ranges	3.4V, 34V, 340V, 600V

Current Measurement

AC current ranges	34A, 300A
AC current resolution	0.01A
DC current ranges	340μA, 3400μA

Resistance Measurement

resistance ranges	340Ω, 3.4kΩ, 34kΩ, 340kΩ, 3.4MΩ, 34MΩ
resistance resolution	100mΩ
open circuit volts	-0.45VDC typical

Temperature Measurement

temperature range	-30°F ~ 1000°F, -35°C ~ 600°C
temperature resolution	0.1°F, 0.1°C
sensor type	K-type thermocouple

Summary

Clamp Meter SC76 General Operation

Accessory Head Compatibility

Meter works with Fieldpiece accessory heads for expanded measurement capabilities.

Non-Contact Voltage Detection

Detects AC voltage via NCV function, lighting LED and beeping for alerts.

Hi Voltage Indicator

Beeps and blinks red LED when voltage exceeds 30V, providing a warning.

Current Measurement

Features a longer fixed jaw for easier single wire selection in bundles.

Microamp Measurement

Used for measuring flame diode current in heater controls.

Capacitance Measurement

Suitable for measuring motor-start and motor-run capacitors.

Temperature Measurement

Uses K-type thermocouple for accurate temperature readings in dynamic environments.

Temperature Unit Selection

Allows display of temperature in Celsius (°C) or Fahrenheit (°F) via jumper.

Field Temperature Calibration

Procedure for calibrating temperature readings to within ±1°F using ice water.

Test Lead Usage and Storage

Tips for using and storing silicone test leads for flexibility and durability.

Safety and Maintenance

General Safety Warnings

Essential precautions for safe operation, including test lead inspection and isolation.

Instrument Symbols Explained

Explanation of symbols indicating caution, manual reference, and double insulation.

Instrument Maintenance

Guidelines for cleaning the exterior and replacing the 9V battery.

Specifications and Measurement Functions

Display and Measurement Rate

Details on the LCD display, analog bar graph, and measurement update rate.

Operating Environment

Specifies acceptable temperature and humidity ranges for operation and storage.

Accuracy and Coefficients

Defines accuracy standards, temperature coefficients, and altitude limitations.

Power and Included Accessories

Information on battery type, battery life, and standard accessories provided.

DC Voltage Measurement

Ranges, resolution, accuracy, input impedance, and overload protection for DCV.

AC Voltage Measurement

Ranges, resolution, accuracy, input impedance, and overload protection for ACV.

AC Current Measurement

Ranges, resolution, accuracy, and overload protection for ACA.

DC Current Measurement

Ranges, resolution, accuracy, voltage burden, and overload protection for DCA.

Resistance Measurement

Ranges, resolution, accuracy, open circuit volts, and overload protection for Resistance.

Diode Test Function

Details on test current, resolution, accuracy, open circuit volts, and indication.

Continuity Test Function

Information on audible indication, response time, and LED status for continuity.

Capacitance Measurement

Ranges, resolution, accuracy, test frequency, voltage, and overload protection.

Temperature Measurement

Ranges, resolution, accuracy, sensor type, and overload protection for temperature.

Hi-V (Voltage) Warning

Indicates meter beeps and red LED blinks for voltages >30VAC/DC.

Non-contact Voltage Sensing

Senses AC voltage from 24V to 600V, activating beeper and LED.

Warranty and Service Information

Limited Product Warranty

Covers defects in material/workmanship for one year, subject to terms.