LC-110 Precision Loop Calibrator

Features a user friendly interface with dedicated buttons and a rotary encoder 

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Rapidly dial in precise values with one hand for the troubleshooting and tuning of process control loops

The Martel LC-110 mA loop calibrator features a user friendly interface with dedicated buttons and a rotary encoder (Quick-Set Knob). This combination dramatically reduces the time it takes to measure, or source voltage or current and power up a loop. The Quick-Set knob features an integral push button that you press to enter a selection. A dedicated menu key brings up a list of functions. The Quick-Set interface highlights an item on that list, and then pressing the knob (clicking it) selects that item to drive further in the menu or implement the task at hand. The “Menu/Exit” key is used to go back to the previous menu or exit from menu structure into measure/source mode. When used a mA calibrator only, there are dedicated keys for automatic step and ramp generation as well as keys to perform a quick zero and span (4 mA, 20 mA, and 25% steps). The rugged case is contoured to easily fit a technician’s hand and the large backlit graphics LCD is best in class.

General Features

  • Best in Class Accuracy at 0.01% Reading
  • Small Rugged design operates on (6) alkaline AAA batteries
  • Intuitive interface that features a Quick-Set Knob
  • 24 VDC loop power with mA Measure Mode (-25% to 125%)
  • Resolution of 1µA on mA ranges and 1mV on voltage ranges
  • Built in selectable 250Ω 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)
Functions mA source, mA simulate, mA read, mA read/loop power, and volts read
Ranges mA (0 to 24 mA) and Volts (0 to 30 VDC)
Resolution 1uA on mA ranges and 1mV on voltage range
Accuracy 0.01% ± 2 LSD all ranges (@23 °C ± 5 °C)
Operating Temperature Range -10 °C to 55 °C
Operating Humidity 10-95% RH non-condensing
Stability 20ppm of FS/°C from -10 °C to 18 °C and 28 °C to 55 °C
Display 128 x 64 pixels, LCD Graphic w/backlight, .34" high digits
Power 6AAA alklaline, lithium, or NiMH batteries
Battery Life >40 hours continuous use (measure mode using alkaline)
Loop Compliance Voltage 24VDC @ 20mA
Over-Voltage Protection 240 VAC
Overload Current Protection 28mA DC
EMC EN61326 Annex A (Portable Instruments)
Dimensions 6" x 3.6" x 1.3' (H x W x D)
15 cm x 9 cm x 3 cm
Weight 9.5 ounces (0.3 kg)
Included Accessories batteries, test leads, NIST Cert with data, and manual

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