Fieldpiece LT16A - True RMS Digital Multimeter - Manual

DIGITAL MULTIMETER
Model: LT16A
OPERATOR’S MANUAL
General description
The LT16A is an excellent true RMS digital multi-
meter for testing motors and electrical equipment.
The LT16A meter measures current, resistance,
voltage, capacitance, frequency, continuity, and
phase rotation. Test leads store within the meter
and can connect the LT16A to Fieldpiece accesso-
ry heads. The body is made out of durable ABS
plastic and comes with an alligator clip test lead for
measuring phase rotation. It also has a backlight.
User maintenance
Battery Replacement: When the multimeter dis-
plays the " " the battery must be replaced to
maintain proper operation. To prevent electrical
shock, turn off the meter and disconnect leads
before removing the back cover.
Fuse Replacement: When only certain ranges
quit working, check the fuse. Open the case and
replace according to the Overload Protection chart.
All other repairs must be performed by a
Fieldpiece service center
For your safety...
General: 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 potential. Keep your
body isolated from ground by using dry clothing, rubber
shoes, rubber mats, or any approved insulating materi-
al. When disconnecting from a circuit, disconnect the
"RED" lead first, then the common lead. Work with oth-
ers. Use one hand for testing. Turn off power to the cir-
cuit under test before cutting, unsoldering, or breaking
the circuit. Keep your fingers on the plastic and behind
the ridge of the probes.
All Voltage Tests: All voltage ranges will with-
stand up to 600VAC or 600VDC. Do not apply more
than 600VDC or 600VAC.
AC Tests: Disconnect the meter from the circuit
before turning any inductor off, including motors,
transformers, and solenoids. Hi voltage transients
can damage the meter beyond repair. Do not use
during electrical storms.
Safety: Designed to meet IEC 61010-1
(EN61010-1), CATIII 600V, Class II, pollution deg.2,
indoor use. CE UL61010-1. C-Tick certified.
Symbols used:
Caution, refer to manual.
Ground
Double insulation
Overload protection
Service
Call Fieldpiece Instruments for one-price-fix-all
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 serv-
ice. The meter will be repaired or replaced, at the
option of Fieldpiece, and returned via least cost
transportation.
www.fieldpiece.com
CAT.III
MAX 600V 15 SEC FOR 200 m V
RANGE MAX 500V 3 PHASE
600V FOR 3O SEC
FUSED
2A MAX
V
MFD
V
2A
MFD
A
A
TRUE RMS PHASE ROTATION
AUTO-OFF CAPACITANCE
LT16A
L1
L2
L3
MAX
MIN
General specifications
Auto-off: off after 25 minutes to extend battery.
Indicators: Continuity beeper (<100
Ω). Low bat.
Overrange: "OL" or “-OL” is displayed.
Operating environment: 32 to 122°F (0 to 50°C)
<70%RH
Storage environment (with batteries removed): -4 to
140°F (-20 to 60°C) <80%RH
Altitude: 6561.7 feet (2000m).
Battery life: 150 hours typical.
Battery type: 9V NEDA 1604 type
Stated accuracies: 74°F±8°F (23°C±4°C), 75%RH
Temperature coefficient: 0.1 x (specified accuracy)
1°F/°C (32 to 66°F (0-19°C), 82 to 122°F (28-50°C)).
MIN/MAX
Record the minimum or maximum reading during a
measurement. To exit the MIN/MAX function, hold the but-
ton for more than 2 seconds.
Backlight
Always be very careful when testing in the dark. You
should always have a separate light on the area you are
testing. The backlight will shine for 4.5 minutes when the
backlight button is pressed.
True RMS
Digital multimeters use one of two types of AC sensing.
The most common is average sensing, normalized to a true
RMS value of a sine wave. The other is true RMS sensing.
The actual true RMS value is sensed for a wave form with-
in the limits of the crest factor. True RMS is needed to cal-
culate power. Either sensing method will give the same
results on a clean sine wave but they may differ on a non-
sinusoidal waveform.
DC voltage
Ranges: 200mV, 2000mV, 20V, 200V, 600V
Resolution: 0.1mV
Accuracy: 0.5%±1
Input impedence: 10M
Ω
AC voltage True RMS (50Hz-500Hz)
Ranges: 200mV, 2000mV, 20V, 200V, 600V
Conversion: True RMS
Crest factor: Less than or equal to 3
Resolution: 0.1mV
Accuracy: 1.5%±5(200mV to 20V ranges),
2%±5(200V, 600V ranges)
Input impedence: 10M Ω
DC Current (through meter)
Ranges: 200μA, 20mA, 200mA, 2A
Resolution: 0.1μA
Accuracy: 1.0%±1 (200μA to 200mA ranges), 2.5%±1
(on 2A range)
Voltage burden: 800mV
AC Current True RMS (through meter)
Ranges: 200μA, 20mA, 200mA, 2A
Crest factor: Less than or equal to 3
Resolution: 0.1μA
Accuracy: 1.5%±5 (200μA to 200mA ranges), 3.0%±5
(on 2A range)
Voltage burden: 800mV
Frequency (autoranging)
Range: 10Hz to 40KHz
Resolution: 1Hz
Sensitivity: 3.5V rms min
Accuracy: 0.1%± 3
Resistance (ohms)
Ranges: 200 Ω, 2kΩ, 200kΩ, 20MΩ, 2000MΩ
Resolution: 0.1 Ω
Accuracy: 1.0%±4 (200 Ω to 200kΩ ranges),
2.0%±4 (20M Ω range),
(5.0%-10)+10 (2000M Ω range)
Open circuit voltage: 0.3VDC typical, (3.0VDC
on 200 Ω and 2000MΩ range)
Diode test
Accuracy: 1.5%±3
Test current: Approx. 1.0mA
Open circuit voltage: 3.0VDC typical
Capacitance (MFD)
Ranges: 200μF, 2kμF, 20kμF
Resolution: 0.1μF
Accuracy: 4%±10
Test frequency: 21Hz
Test voltage: <3.0V
Phase rotation
Range: 80VAC to 500VAC (45Hz to 450Hz)
This function enables you to connect 3-phase
power to the correct leads of a motor to insure the
motor turns in the intended direction. The terminals
the motor are marked L1, L2, and L3. The wires
supplying power are not marked. Connect meter
jacks marked L1, L2, and L3 to the power wires in
any order. Make sure all three leads are connected
(L1, L2, and L3 will be “on”). “OK” indicates “for-
ward”. Connect L1 on the meter to L1 on the motor,
L2 on the meter to L2 on the motor, etc. The motor
will turn in the direction designed. If you get “ER”
(reverse), swap any two leads. It should then say
“OK.”
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 OUT OF
THE SALE OF A FIELDPIECE INSTRUMENT’S
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 INSTRU-
MENT OR OTHER INCIDENTAL OR CONSEQUEN-
TIAL DAMAGES, EXPENSES, OR ECONOMIC LOSS,
OR FOR ANY CLAIM FOR SUCH DAMAGE, EXPENS-
ES, OR ECONOMIC LOSS.
State laws vary. The above limitations or exclusions
may not apply to you. This warranty gives you specific
legal rights, and you may also have other rights which
vary from state to state.
>200mV range 600VAC/DC rms
Resistance 500VAC/DC rms
Diode Test 500VAC/DC rms
Continuity 500VAC/DC rms
Capacitance
200mV range
VAC/DC
Phase Rot.
AAC/DC
600VAC/DC rms
for 15 sec
600VAC/DC rms
for 30 sec
2A/600V fuse
(6.35X25.4mm)
model RFM70
0.25A/500V fuse
(6.3X32mm)
model RFM66
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