A highly integrated loop calibrator featuring several patented technologies, ConST 312 is an ultra-compact, rugged, and ease-to-use hand-held device for sourcing, simulating and measuring current, mV and V checking loop integrity, and capture switches. Its smart phone-like menu and interface make the operation simpler and easier. The
ConST 312 is ideal for calibrating, maintaining, and troubleshooting various loop devices on site.

• Measuring and sourcing loop current, mV and V
Measures loop current up to 30mA with 0.1µA resolution
Measures voltage signals up to 30 V, 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
Automatic switch test

• Data statistics and analysis
Display max, min, peak-t -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 x52mm ), and weight 1.6 lb (0.7 kg)
One hand operation

• Snapshot
Save and manage up to 100 snapshots

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

• Rugged
Rugged design for harsh environments
Passed a 1-meter drop test
Three years warranty for the ConST 312, and one year for the battery pack

• Misuse protection
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.

ConST 312 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 current loops.

Electrical Specifications:

Ordering Information

Model number: ConST 312

Accessories (included)
1pc 110V/220V external power adapter (Available standards: USA, EU)
1pc chargeable Li-ion battery
4pcs test leads
2pcs short circuit cable

Optional Accessories:

ConST312 Multifunction Loop Calibrator Datasheet
ConST312 Multifunction Loop Calibrator User Manual