960-58A0-030 Datasheet, PDF (8/16 Pages) Magnetrol International, Inc. – Actuator- Sensor-Interface (AS-Interface®) Ultrasonic Level Switch

2.5.2.2 Level Test Push button
The level test push button is used to manually test the liquid
level measurement operation of the Model 960 unit. Pressing
this push button will reverse AS-i output. If the transducer gap
is dry, pressing this pushbutton causes the unit to report a wet
gap condition. If the gap is wet, pressing this pushbutton causes
the unit to report a dry gap condition. The time delay pot does
not affect the operation of the level test pushbutton.
2.5.2.3 Malfunction Test Push button
The malfunction test pushbutton is used to manually perform
a complete diagnostics check of the 960 unit. Pressing the mal-
function test push button stops all pulses between the electronics
and the transmit piezoelectric crystal in the transducer. This
simulates a failure of the 960 unit which is reported as follows.
• AS-i output indicates a malfunction.
• The diagnostic LED comes on to indicate that there is a
fault condition.
• AS-i output indicates a wet gap condition and the WET
LED comes on.
2.5.3 LED Status Indications
Model 960 units have four status indicating LEDs:
• Green POWER LED is on when power is applied to the unit.
• Yellow WET LED is on when liquid fills the bottom ¹â„4" of
the transducer gap.
• Red DIAGNOSTIC LED is on continuously when the
Model 960 diagnostics detects any unit failures. This LED
may also be used to diagnose what type of failure has
occured (see troubleshooting section).
• Red FAULT LED is on continuously to indicate AS-i
communications fault. This LED also flashes when a unit
failure occurs as indicated when the diagnostic LED is on
continuously.
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51-632 Echotel Model 960 Ultrasonic Level Switches