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  User's Manual
Package Art
Features and Benefits
Competitive Advantages
What's Included?
Recommended
Specifications
What is It?
Classic Style Digital Multimeter with Phase Rotation - LT16A - The HVAC/R Detective’s True RMS Meter - LT16A
The LT16A is a classic style multimeter with True RMS meter and phase rotation. This manual ranger covers the electrical parameters you need for HVAC/R and, with detachable test leads, works with our accessory heads to test non-electrical parameters too. The LT16A meter measures current, resistance, voltage, capacitance, frequency, continuity and more. Test leads store in the meter body along with the tilt stand and magnetic hanger. The body is constructed of durable ABS plastic and a blue backlight makes the large LCD even more visible. We like to call this the HVAC/R detective’s meter. It’s the meter for technicians that like to search down, figure out and solve electrical mysteries on a system.
How Does it Work?
The LT16A is a True RMS manual ranging DMM that comes with an amp clamp and includes phase rotation for testing three-phase motors. Use the MIN/MAX function to record highs and lows. The continuity beeper tells you if a circuit is open or closed. Operation of the LT16A is easy. Simply select a range and test to hunt down those electrical culprits.
Selecting Ranges
For DC voltage, set the meter to the VDC parameter instead of VAC as shown below. For all ranges and functions choose a range just above the value you expect. If display reads "OL" (overload), select a higher range. If display shows less than three numbers, select a lower range for better resolution.
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Voltage
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AC Amps
Connect the included Fieldpiece accessory head model ACH4 s to the LT17A using the included deluxe silicone leads. Make sure the mter is on the 200mVAC range. Read 0 to 400AAC directly on the LCD.
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Resistance and Continuity Beeper
To check a diode or continuity, select the range with the diode and continuity symbols as shown. To measure resistance, select the range just above the value you expect to read.
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Accessory Heads
For all other Fieldpiece accessory heads switch the meter to 200mVDC or 2000mVDC range to measure other parameters.
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DC Current
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Phase Rotation
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Capacitance
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Frequency
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Features and Benefits
Designed specifically for HVAC/R field service, the LT16A offers specific features and benefits to HVAC/R field service pros including:
Works with Fieldpiece Accessory Heads
There is a Fieldpiece accessory head available for just about any job. There are heads to measure temperature, superheat, subcooling, RH%, wet bulb, dew point, vacuum (microns of mercury), manometer (inches of water column), amps AC&DC, high voltage, CO, %CO2, air velocity, and many more.
Continuity Indicator
If you were doing lab testing, these features would probably drive you crazy. We’ve heard from more than one HVAC/R veteran that these features really remind you of what you’re doing and they’ve avoided potentially dangerous situations in the field. The Hi-V LED and beeper let you know when you’ve hooked up to a circuit over 30V. The continuity LED and beeper tells you if a circuit is open or closed.
400AAC
Using the detachable test leads and the accessory head amp clamp, read 0-400 amps directly on your meter.
Capacitance (MFD)
Measure microfarads on motor-run and motor-start capacitors using this range. Disconnect the capacitor from power first. Short the terminals to discharge the capacitor. Disconnect any resistors that might be between the terminals of the capacitor and measure to check for degradation.
Microamps DC – Flame Rectification Tests
The most common ‘no heat” call has to do with a malfunctioning flame sensing diode. Simply turn the meter to microamps DC, hook up, and see if the flame sensing rod is functioning properly.
Phase Rotation
Measure the poles of 3-phase motors to make sure it’s spinning in the right direction..
Frequency
Measure from 10Hz to 40kHz using this range with 1 Hz resolution.
True RMS
Digital multimeters use two different 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. Either sensing method will give the same results on a clean sine wave but they may differ on a non-sinusoidal waveform.
Silicone Leads with Detachable Probe Tips
Because the wire insulation is silicone, the leads stay flexible in cold weather and will not melt if bumped by a soldering iron. When testing electrical circuits with two hands, there is a risk that a careless mistake may complete a circuit through your body and potentially cause death or injury. Use the either probe clip on rubber boot to connect and firmly hold the V lead in place, detach the COM probe tip, connect an alligator lead tip to COM and ground, and perform a one-hand test more easily than most meters on the market. Built-in lead storage makes it easy to keep everything together from job to job.
Tilt Stand and Magnetic Hanger
One thing we hear from technicians every day is how much they enjoy the magnetic hanger because it keeps the meter out of the way while testing. The LT17A includes the magnet and a tilt stand to give you a choice in the way you want to use it.
Bright Blue Backlight
Easily read the display in overcast conditions or in dimly lit areas.
MAX/MIN hold
Record the minimum or maximum reading during a measurement. To exit the MIN/MAX function, hold the button for more than 2 seconds
And More:
- Volts AC.
- Volts DC.
- Resistance (Ohms).
- Diode Test
- Rugged ABS case with rubber boot.
- Fits naturally in your hand despite classic design.
- Auto power-off (APO) to conserve battery life.
Competitive Advantages
The electrical parameters on this meter are among the most comprehensive in the industry. Add the capability of testing all the other parameters you need for HVAC/R field service through accessory head instruments, and this meter goes from contender to a hands-down favorite. Literally. Use the included deluxe silicone lead set to hook up the V and COM leads, hang or tilt the meter out of the way, and use the included third yellow lead to perform a “no-hands” test on a three-phase motor. ALlthough there are a lot of great electrical meters out there, not many can match the LT16A in it’s versatility for HVAC/R electrical testing.
What's Included
- Classic Style Digital Multimeter with Phase Rotation - LT16A
- Deluxe Silicone Test Leads - ADLS2
- One (1) Yellow Phase Rotation Test Lead - AYL1
- Short Alligator Lead Extensions - ASA2
- 400A Amp Clamp Accessory - ACH4
- Mail Pouch-Style Instrument Case - ANC5
- 9-Volt battery (installed)
- Operator’s manual
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Recommended Accessories and Replacement Parts
Technicians who like the LT16A may also enjoy these instruments and accessories:
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Classic Style Digital Multimeter with Temperature - LT17A
The LT17A is the classic style meter the boss calls the biggest “Bang for the Buck”. He’s got a point. This manual ranger covers most of the parameters and ranges you need for most HVAC/R applications. The LT17A meter measures current, resistance, voltage, capacitance, frequency, continuity, and temperature. Test leads store in the meter body and, with the probe tips removed, connect the LT17A to Fieldpiece accessory heads. The body is made out of durable ABS plastic and comes with a bright blue backlight for poorly lit test areas. Get great accuracy using the included k-type thermocouple and an easily accessible temperature calibration pot.
Read More..
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600 AAC / ADC Current Clamp Accessory – ACDC6
The ACDC6 is a high-current AC / DC Current Clamp Accessory that gives technicians more flexibility when testing line current. Measures up to 600A AC or DC. The clamp enables most multimeters to measure current without breaking the circuit. The jaw opens to 1.18 inches (3 cm). A coiled cable keeps clutter out of the testing area, Quickly zero out the clamp using the adjustable dial on the face. Use with any multimeter with industry standard Volt and COM jacks and mV AC and DC ranges. Green mechanical contractors tell us they are also using the clamp to measure high-current lines on integrated solar panel powered HVAC / hot water systems.
Read More..
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Superheat and Subcooling Accessory for Air Conditioning – ASX14
The Fieldpiece Superheat and Subcooling Accessory for Air Conditioning, model ASX14, measures suction line, or low side, line temperature and pressure. It then calculates actual superheat in real time using built in P/T charts. It also measures liquid line, or high side, line temperature and pressure, and calculates actual subcooling. Use it to get actual superheat on R-22 and R-410A fixed orifice systems and actual subcooling on TXV / TEV regulated systems. Use the “T” fitting to charge to actual superheat or subcooling by putting the ASX14 in-line between your refrigerant bottle and the system.
Read More..
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Large Deluxe Meter Case - ANC8
The Large Deluxe Meter Case, model ANC8, is a technician favorite because it handles a lot of gear for an affordable price. It has four pockets in all, including a deep center pocket that holds a combination of 2 full-size meters and 4 accessory head instruments. Features include rugged nylon construction, padding, durable pockets inside and out, a rugged double zipper and a shoulder strap. The ANC8 is a must have upgrade for any technician that has multiple Fieldpiece meters and accessory heads.
Read More..
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Specifications
TECHNICAL 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)).
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.
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 “forward”. 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.”
Fuse Replacement: When only certain ranges quit working, check the fuse. Open the case and replace according to the Overload Protection values below. If that doesn’t work visit our Warranty Page.to check for other problems.
Overload Protection
VAC/DC:
(200mV range ) 600VAC/DC rms for 15 sec
(>200mV range) 600VAC/DC rms
Phase Rotation: 500VAC/DC RMS for 30 sec
AAC/DC: 0.25A/500V fuse (6.3X32mm) model RFM66
Capacitance: 0.25A/500V fuse (6.3X32mm) model RFM66
Frequency: 500VAC/DC rms
Resistance: 500VAC/DC rms
Diode Test: 500VAC/DC rms
Continuity: 500VAC/DC rms
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