Magnetostrictive and Ultrasonic Probes

Minimum procedures to be conducted by a qualified service technician.

Has all input wiring been inspected for proper entry and termination, including testing for ground faults? 

Yes

No

Have the probe and sensors been checked for visible damage such as residue buildup, cracks, or breaks? ^1,2

Yes

No

Has the accuracy of the level sensor been tested? ³

Yes

No

Has the accuracy of the water sensor been tested? ⁴

Yes

No

Has the appropriateness of the high water level alarm setting been verified? ⁵

Yes

No

Are all alarms activated and functioning properly?

Yes

No

Notes:

• 1.  Damaged probes must be cleaned or replaced as appropriate. Probes used in heavier products such as waste oil should be checked more frequently. Heavier products can leave deposits on the probe shaft and float assemblies that may restrict the measurement capacity of the probe.
   

• 2.  Because the magnetostrictive probe consists of moving parts, its sensors can be damaged by excessive frictional wear as well as residue build-up. Residue build-up can affect the weight of the sensor as well as inhibit its ability to slide freely along the guide tube. Inaccuracies in the product level measurements could indicate a problem with the probe sensors. For additional testing of the probe sensors, perform the following test:
   

  • Remove the probe from the tank and place it carefully on the ground.

  • Place the water sensor flush with the bottom of the probe shaft and place the product float near the middle of the probe shaft. 

  • Check the height reading on the tank gauge monitor (after allowing sufficient time for the monitor to respond). Measure the distance from the bottom of the probe to the bottom of the product float and compare it with the reading on the monitor.
     

• 3.  To test the accuracy of the product sensor: 

  • Using the tank console monitor, take an initial fuel level reading.

  • Dispense one gallon of product into a calibrated container.

  • Using the tank console monitor, take a second fuel level reading. 

  • Verify that the change in tank volume is one gallon.
     

• 4.  To test the accuracy of the water sensor: 

  • Remove probe from the tank.

  • By hand, move the water float up the probe to a point higher than the high-water alarm set point.

  • The monitor should respond with a high water alarm report. (The water height may also appear on the tank monitor display console.

  • Check this height against its actual location. The high water level alarm should not be set so high that water ingress into the tank goes undetected for long periods of time.

Disclaimer:
This checklist is not intended to tell the technician how to perform the maintenance and system check.  Technicians should follow manufacturers' detailed instructions while making sure that all of the items on the checklist have been covered.

Mass Buoyancy Probes

Minimum procedures to be conducted by a qualified service technician.

Has all input wiring been inspected for proper entry and termination, including testing for ground faults?

Yes

No

Has the probe been checked for visible damage (such as residue buildup or cracks)? ¹

Yes

No

Has the battery been tested within the last 3 months?

Yes

No

Has the accuracy of the product sensor been tested? ²

Yes

No

Has the accuracy of the water sensor been tested? ³

Yes

No

Has the appropriateness of high-water level alarm setting been verified? ⁴

Yes

No

Are all alarms activated and functioning properly?

Yes

No

Notes:

• 1.  Damaged probes must be cleaned or replaced, as appropriate. The mass displacement probe is very susceptible to dirt and residue build-up and should be checked semi-annually and cleaned, if necessary. Mass displacement probes used in viscous products such as waste oil should be checked more frequently. Products of this type can leave heavy deposits on the probe which may inhibit the accuracy of the probe. Checking a reconciliation report and/or manual sticking could verify the system's accuracy.
    

• 2.  To test the accuracy of the product sensor:

  • Using the tank console monitor, take an initial fuel level reading.

  • Dispense one gallon of product into a calibrated container.

  • Using the tank console monitor, take a second fuel level reading. 

  • Verify that the change in tank volume is one gallon.
     

• 3.  To test the accuracy of the water sensor: (Note: water sensor is separator from the mass buoyancy probe.)

  • Remove the probe from the tank. 

  • By hand, move the water float up the probe to a point higher than the high water limit.

  • The monitor should respond with a high water alarm. (The water height may also appear on the tank monitor display console.)

  • Check this height against its actual location.
     

• 4.  The high water level alarm should not be set so high that water ingress into the tank goes undetected for long periods of time. Disclaimer: This checklist is not intended to tell the technician how to perform the maintenance and system check. Technicians should follow manufacturer�s detailed instructions while making sure that all of the items on this checklist have been covered. by Pro calvin silver

Disclaimer:
This checklist is not intended to tell the technician how to perform the maintenance and system check. Technicians should follow manufacturers' detailed instructions while making sure that all of the items on this checklist have been covered.