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LC 110 & LC 110H -- Precision Current Loop Calibrator with HART



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The Martel LC-110 and LC-110H are mA (loop) calibrators designed totake the loop calibrator class to the next level. The new LC-110 series featuresa user friendly interface with dedicated buttons and a rotary encoder (Quick-SetKnob). This combination dramatically reduces the time it takes to measure, or sourcevoltage or current and power up a loop. The rugged case is contoured to easily fit a technician’s hand and the large back lit graphics LCD is best in class. The LC-110H differs from the standard LC-110 in that it incorporates HART communications and supports a select set of the HART universal and common practice commands. This unique feature allows the LC-110H to be used as both a loop calibrator and communication tool.In the communicator mode the user will be able to read basic device information, perform diagnostic tests, and trim the calibration on most HART enabled transmitters. In the past, this could only be done with adedicated communicator, high-end multifunction calibrator costing thousands of dollars, or a laptop computerwith HART modem. The LC-110H will allow many more technicians to service and support HART devices.In addition to HART communications, we also gave the user the ability to get information out of the LC-110H. Need to quickly document the parameters of all the HART transmitters in your plant? Just add theBetaLOG HART software/cable to capture and upload to twenty configurations in either (.csv) or (.txt) format. We did not stop there! How about the ability to data log or record data on aparticular transmitter for troubleshooting? The data log tool featuresselectable capture interval from 1 to 60 seconds and a logging capacity of 9800 records or 99 individual sessions. Each datasample contains the LC110H measurement, all four process variables, and the standard status conditions.

General Features

- Best in Class Accuracy at 0.01% Reading.

- Small Rugged design operates on (6) standard AAA batteries.

- Intuitive interface that features a Quick-Set Knob.

- 24VDC loop power with mA Measure Mode (-25% to 125%).

- Resolution of 1?A on mA ranges and 1mV on voltages ranges.

- Built in selectable 250? Resistor for HART communications.

- Simple two wire connection for all measurements.

- Auto Shutdown to conserve battery life (adjustable up to 30 minutes).

- Variable step & ramp time in seconds.

- Adjustable span selection (0 to 20mA or 4 to 20mA)

- Valve Test (simulate defined mA values with % keys)


The LC-110 & LC-110H utilizes a rotary encoder (Quick-SetKnob) to set the output (mA) and also to select the function toimplement. The Quick-Set Knob features an integral push buttonthat you press to enter a selection. A dedicated menu key brings up a list of functions. The Quick-Set interface highlights an item on thatlist, and then pressing the knob (clicking it) selects that item to drivefurther in the menu. The “Menu/Exit” key is used to go back to the previous menu or exit from menu structure into measure/source mode.All functions and HART commands are accessed in this manner. Whenused as mA calibrator only, there are dedicated keys for automatic stepand ramp generation as well as keys to perform a quick zero span (4mA, 20mA, and 25% steps).


Model LC 110 & LC 110H


mA source, mA simulate, mA read, mA read/loop power, and volts read


mA (0 to 24mA) and Volts (0 to 30VDC)


1uA on mA ranges and 1mV on voltage range


0.01% +/- 2LSD all ranges (@23° +/- 5°C)

Operating Temp Range

-10°C to 55°C

Humidity Range

10 to 95% non-condensing


20ppm of F.S. /°C from -10°C to 18°C and 28°C to 55°C


128 x 64 pixels, LCD Graphic w/backlight, .34” high digits


6AAA alkaline, lithium, or NiMH batteries

Battery Life

40 hours continuous use (measure mode using alkaline)

Loop Compliance Voltage

24VDC @ 20mA

Over-Voltage Protection


Overload Current Protection

28 mA DC


EN61326 Annex A (Portable Instruments)

Dimensions (LxWxD)

6” x 3.6” x 1.3” (15 cm x 9 cm x 3 cm)


9.5 ounces (0.3 kg)

Included Accessories

NIST traceable calibration certificate with data, batteries, test leads, and manual

Additional Feature

· Built in HART modem for communication capability to perform the following commands:

- Read Message, Descriptor, Cal Date, Short and Long Tag

- Read Sensor PV and Output Information

- Write Short and Long Tag

- Write Descriptor and Message

- Select PV Unit

- Write PV Ranges (Upper and Lower)

- Enter/Exit Fixed Current Mode

- Set Zero Offset

- Trim D/A at 4mA & 20mA

The ability to store up to twenty HART device configuration files for uploading via the BetaLOG Hart software. Configurations can be stored as .csv or .txt files. This allows the end user to document the entire plant for HART devices without spending thousands of dollars for plant assetmanagement software


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