A: The original 9240SI is no longer manufactured. You have two options: contact a specialized test equipment repair service or purchase the approved replacement unit, the 20549SI Loop Controller.

Increments numerical values or toggles menu parameters.

Select your sensor type (e.g., K for K-type thermocouple, PT for PT100).

Whether you are using this loop for

An insulation check tests the quality of the dielectric barrier between the sensing element core and the aircraft structure. This test is performed between the and Black terminals. The black terminal is connected to the aircraft's ground. By measuring the loop's response to the test signal, the 9240SI can determine if the insulation has degraded or if the sensing element has shorted to the airframe.

The user interface consists of two digital displays and a four-button keypad. Display Indicators