ADT220 Multifunction Loop Calibrator

Additel ADT220 Multifunction Loop CalibratorAdditel's ADT220 is a highly integrated loop calibrator featuring several patented technologies, the calibrator is an ultra-compact, rugged, and best of all, easy to use hand-held device that will source, simulate and measure loop current, mV/V, loop integrity, and also perform switch testing. Its smart phone-like menu and interface makes it simple and easy to use. The ADT220 is ideal for calibrating, maintaining, and troubleshooting various loop devices in the field.


The 220 loop calibrator is a process tool for measuring, sourcing and simulating mA, mV and V, captures switch values and provides 24 V loop power. It is a high performance solution for calibration, repair and maintenance of various loops devices, loop integrity check, and switch capture.




Electrical Specifications
Order Info
Video Demo

Measuring and sourcing loop current, mV and V

  • Measures loop current up to 30mA with 0.1µA resolution
  • Measures voltage signals up to 30V, and mV signals up to 200 mV
  • Sources loop current, mV and V
  • 24V loop power supply with simultaneous current measurement
  • Simultaneous dual reading capability
  • Pressure switch test

Data statistics and analysis

  • Display max, min, peak-to-peak, average, and percentage simultaneously 
  • Convert data to a real physical value through re-scaling function

Data logging

  • High-capacity storage with up to twenty thousand records
  • On-line view, index, analyze, auto-curve, and list the data

Various sources and converting mode

  • Support linear, flow, valve, and 25% stepping source
  • Auto-source of ramping and stepping
  • Gauge span examination

"As Cal" on-site calibration tools

  • Four on-site calibration tools preset: loop indicator, sensor/transmitter, signal isolator/converter, and limit
  • alarm/switch

Support 2W transmitter connection

Multi lingual interface :English, Chinese

Easy to use 

  • Smartphone-like menu and interface make the operation simpler and easier
  • Ultra-compact, size 3.9” x 7.6” x 2.0” (100mm x 192mm x 52mm), and weight 1.6 lb (0.7 kg)
  • One hand operation


  • Save and manage up to 100 snapshots


  • 3.5 inch TFT color screen
  • 4, 5, or 6 digits adjustable display


  • Rugged design for harsh environments.
  • Passed a 1-meter drop test
  • Three year warranty for the ADT 220, and one year for the battery pack

Misuse protection and Electrical isolation

  • Up to 30V voltage on any two sockets and up to 1A current on current sockets will not damage the
  • calibrator. The calibrator will return to normal condition as soon as the voltage or current is removed.
  • Measuring, sourcing and loop power circuits are electrically isolated each other.

Convenient tools

  • Calculator, thermocouple converter, HOLD screen lock

Rechargeable battery

  • Rechargeable Li-ion battery for 15 hours uninterrupted use.
  • Battery life will be reduced when 24V is applied.
  • The rechargeable battery is replaceable.
  • Firmware upgrade
  • Support firmware upgrade when available

Warranty 3 years 

Electrical Measure Specifications

Measurement Accuracy

Voltage DC
-300.000 to 300.000 mV
-60.0000 to 60.0000 V
0.01%RD+15 μV
0.01%RD+3 mV
Current DC
-30.0000 to 30.0000 mA
0.01%RD+1.5 μA
Loop integrity test
0 to 2000.0 ohm
0.1 Ω
0.02%RD+0.2 Ω
Switch test
 In case the switch comes with voltage, the voltage range: 3 to 24V


Source Accuracy

Voltage DC
-10.00 to 200.00 mV
0 to 12.000 V
0.02%RD+10.5 μV
0.02%RD+0.6 mV
Current DC
0 to 22.000 mA
0.02%RD+1.1 μA



 Environmental Specifications
 Operating Temperature
 -10°C to 50°C
 Storage Temperature
 -20°C to 60°C
 <90%, non-condensing
 Safety Specifications
 European Compliance
 CE Mark
 Mechanical Specifications
 3.5 inch TFT color screen
 Electrical Connection
 φ4mm sockets and flat mini-jack thermocouple socket
 RS232 Interface
 standard RS232-DB9 socket
 3.9” x 7.6” x 2.0” (100mm x 192mm x 52mm)
 1.6 lb (0.7 kg)
 Power Supply
 Polymer Li-ion rechargeable battery,or 10V DC adaptor
 Rechargeable Li-ion battery (included)
 Battery Life
 15 hours uninterrupted use
 Battery life will be reduced when 24V is applied
 Battery Charge
 110V/220V external power adapter (included)

Model Number:  ADT220 
Accessories (included)
 110V/220V external power adapter
1 pc
 Chargeable Li-ion battery
1 pc
 Test leads
2 sets (4 pcs)
 Short circuit cable
1 sets (2 pcs)
1 pc
 NIST traceable calibration certificate
1 pc
Optional Accessories
Model number
 USB to RS232 (DB-9 Male) Adapter
 Spare chargeable Li-ion battery for multifunction calibrator
 110V/220V external power adapter for multifunction calibrator
 Carrying case for multifunction calibrator