Simulate 2-wire transmitters to calibrate receivers, recorders, controllers, indicators and computers. Loop power eliminates the need for batteries. Loop current is clamped at the key value you select. Accuracy is ±0.08% of 4 to 20mA, even with changes in load and supply voltage.

Switch settings of 0, 25, 50, 75 and 100% give you fast, full range checkout of instrument or system. The single switch and palm-sized case have been designed for simple, one handed operation. Just clip the built-in leads to the 2-wire terminals in the field, junction box or control room.

When you check out receivers, recorders or controllers in a 2-wire 4 to 20mA loop, simply disconnect the 2-wire transmitter and hook up a Model 46. Flip a switch to get instant full scale and zero outputs. The calibrator operates like a 2-wire transmitter by modulating the external power supply voltage into a 4 to 20mA signal.

The Model 46 receives all of its operating power from the loop. This lets you operate continuously for days when long term loop testing is required. Use it as a manual loading station when a controller needs repair or replacement. Minimize process shutdowns installing a new controller.