Fieldpiece LT16A User Manual

DIGITAL MULTIMETER
Model: LT16A

OPERATOR’S MANUAL

General description

The LT16A is an excellent true RMS digital multi­meter 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 accesso­ry 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 dis­plays 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 materi­al. When disconnecting 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 fingers on the plastic and behind
the ridge of the probes.

All Voltage Tests: All voltage ranges will with­stand 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 serv­ice. 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

15SEC FOR

200mV

RANGE

MAX

500V 3 PHASE

600V FOR 3O SEC

FUSED

2A

MAX

V

MF

D

V

2A

MF

D

A

A

TRUE RMS PHASE ROTATION
AUTO-OFF CAPACITANCE

LT1 6A

L1

L2

L3

MAX

MIN

General specifications

Auto-off: off after 25 minutes to extend battery.
Indicators: Continuity beeper (<100Ω). 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 but­ton 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 with­in the limits of the crest factor. True RMS is needed to cal­culate power. Either sensing method will give the same
results on a clean sine wave but they may differ on a non­sinusoidal waveform.

DC voltage

Ranges: 200mV, 2000mV, 20V, 200V, 600V
Resolution: 0.1mV

Accuracy: 0.5%±1
Input impedence: 10MΩ

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: 10MΩ

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: 200Ω, 2kΩ, 200kΩ, 20MΩ, 2000MΩ
Resolution: 0.1Ω
Accuracy: 1.0%±4 (200Ω to 200kΩ ranges),

2.0%±4 (20MΩ range),
(5.0%-10)+10 (2000MΩ range)

Open circuit voltage: 0.3VDC typical, (3.0VDC

on 200Ω 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 INSTRU­MENT OR OTHER INCIDENTAL OR CONSEQUEN­TIAL DAMAGES, EXPENSES, OR ECONOMIC LOSS,
OR FOR ANY CLAIM FOR SUCH DAMAGE, EXPENS­ES, 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

Re si sta n ce 500VAC/DC rms
Diode Test 500VAC/DC rms
Continuity 500V AC/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

!

v14

V

MF

D

V

A

A

VW

COM

How To Use Your Multimeter

For DC voltage and currents, set the meter to the DC parameter instead of AC as shown to the left. For all ranges and functions choose range just above value

you expect. If display reads "OL” or “-OL" (overload), select a higher range. If display shows less than three numbers, select a lower range for better resolution.

Voltage Amps Microamps Resistance & Continuity Beeper

V

MF

D

V

A

A

COM

2A

V

MF

D

V

A

A

COM

2A

V

MF

D

V

A

A

COM

V

W

Optional accessory heads

Fieldpiece accessory heads convert the desired
parameter into a millivolt signal. For example, the
ARH4 converts one °F into one milli-volt DC. The
multimeter must then be set to read millivolts DC.
One exception is the ACH4 current clamp which
must be set to read AC millivolts. Any digital multi­meter with these scales can be used in conjunction
with Fieldpiece Accessory Heads.

Use Fieldpiece deluxe silicone test leads
(model# ADLS2) with removable probe tips to use
the accessory heads with the LT16A.

AirVelocity
&Temperature
Head

English

READLOBATT

ON

LCDX
100

Average

(16sec)

Metric

Real
time

AAV3

AUTO-

OFF

English Metric

Ft/min M/s

KM/hrMPH
ºF ºC

OFF

V

MF

D

V

A

A

COM

MFD

AUTO­OFF

T/C
Cal

STABLE

Pressure

Temp

SHor SC

ON

LOBATT

Air
Conditioner
Superheat
andSubcooling

ENGLISH

METRIC

R22

R410A

Set
ATM

ASX14

SH

SC

Frequency AC Current Clamp Capacitance (MFD)

V

MF

D

V

A

A

COM

VW

V

MF

D

V

A

A

L1

L2

L3

Phase Rotation Diode Test Accessory Heads

V

V

COM

V

Ω

A

D

MF

Ω

V

V

V

COM

ACH4

!

400AAC MAX

A

A

D

MF

A

0
0

4
V
0

0
3

1AAC / 1mVAC

Clamp

AC Current

AT.III

C

P

M

A
L

C

V

A

D

MF

V

300V

CLAMP

CAT.III

A

400A

AC Current
Clamp

1AAC / 1mVAC
400AAC MAX

ACH4

AUTO OFF

!

ARH4

COM

V

Ω

A