Chapter 7 - Maintenance and Calibration Procedures
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7.2.4 Ultrasonic Clamp-On Sensor Verification
This procedure is used to verify that the Ultrasonic clamp-on sensors operate at the
appropriate alarm conditions. The clamps are removed one at a time and then monitored at
the System Test menu under Digital Input.
1.
Locate the 2 Ultrasonic sensors mounted at their respective locations and note the
mounting location for each, refer to Figures 7-3, 7-4 and 7-5
▪
Res Overfull
– Yellow – Vent Line, Above V4 – ULS2
▪
Liquid in Vac Line
– Black – Vacuum Source, Above V7 – ULS3
NOTE: Bulk Empty Sensor, ULS1 mounted on the external refill line is not used
2.
To verify the alarm activates for each, remove each sensor one at a time to verify the
alarms appear on Main Display and changes states;
▪
Sensor wet shown as LIQ in red
▪
Sensor dry shown as GAS in white
3.
Carefully replaced sensor and press the alarm field on the Main Display to verify the
alarm clears from the Main Display to reset alarm. Do not over tighten knurled
thumbscrew as this can crack and damage sensor
NOTE
: The sensors when removed will cause an additional Ultrasonic Failure alarm
4.
Verify the Res Overfull sensor by entering Configuration Menu and then selecting
SYSTEM TEST and then TEST DIGITAL IN
5.
Find Input labeled RES OVERFULL, DI 13. The Input displayed will show the
corresponding state of the input (closed or open). When the sensor is removed from the
tubing, the status will change from closed to open
6.
Reinstall the Res Overfull sensor and verify the status returns to the closed
7.
Repeat for the Liquid In Vac Line sensor, DI 12.
