PL-573
AiRanger SPL
Page 57
Enhancement Param.
P651
Sound Velocity Calibration
Use this feature if:
•
The vessel atmosphere is other than "air".
•
The vessel atmosphere temperature is unknown and a temperature sensing device is
not used.
•
The Reading accuracy is acceptable at higher material levels only.
To perform a Sound Velocity Calibration:
With the material at a low steady level...
1. Allow sufficient time for the vapour concentration to stabilize.
2. Press
to display the calculated distance*.
3. Repeat step 2 at least 5 times to overcome Echo Lock (P721) and verify repeatability.
4. Measure the actual distance* (e.g. with a tape measure).
5. Enter the actual value. (Velocity parameters P653 and P654 are adjusted accordingly).
Repeat this procedure if the vessel atmosphere type, concentration, or temperature
varies from that present when the last sound velocity calibration was performed.
Values:
-999 to 9999
* When Operation (P001) is set for:
•
"level", the distance is from Empty (P006) to the material/object surface.
•
"space" or "tripper", the distance is from Span (P007) to the material/object surface.
•
"distance", the distance is from the transducer face to the material/object surface.
P652
Offset Correction
View the amount of offset applied to the Reading.
This value is automatically adjusted when an Offset Calibration is performed.
Alternatively, if the amount of Offset Correction required is known (and performing an
Offset Calibration is not desired), enter the amount to be added to the Reading
before display.
Values:
-999 to 9999
P653
Velocity
View the current vessel atmosphere sound velocity.
This value is based on Velocity at 20°C (P654) for the current Temperature (P664),
based on the sound velocity vs. temperature characteristics of "air".
When a Sound Velocity Calibration is performed, this value is automatically adjusted
as required to suit the current atmosphere type, concentration, and temperature.
Summary of Contents for AiRanger SPL PL-573
Page 1: ...AIRANGER SPL Instruction Manual PL 573 March 2001 IRANGER SPL 33455730 Rev 1 2 ...
Page 8: ...Page 8 AiRanger SPL PL 573 Specifications ...
Page 24: ...Page 24 AiRanger SPL PL 573 Installation ...
Page 86: ...Page 86 AiRanger SPL PL 573 Enhancement Param ...
Page 102: ...Page 102 AiRanger SPL PL 573 Maintenance ...
Page 108: ...Page 108 AiRanger SPL PL 573 Troubleshooting ...