
| New Method of Checking Tape Length mobile What is the big deal about this?Service Centres all over the world for the Portable Tank Gauging of Oil Tankers are busy with the annual temperature calibration work, as a Standard Procedure required by the ship Operation for the Portable Tank Gauge, this is according to the requirement of the API and ISO standard. Most of the stations will do the temperature calibration in-house and send the tape length validation to external laboratory for auditing. However, in 2007, the laser time-of-flight or phase measurement was introduced. This instrument measures the time difference for a laser beam to travel from point A to point B and reflected back to the instrument. The distance is measured in the time it took to come back and it is in nano second. That is what separates this instrument from the ultrasonic, the beam is not interfered by any obstacles nearby, but for a longer distance, it needs a reflective target. | ||||
| | LASER Technology Victor 851A
We did this tape length test for the tape marked 20N at 20oC, placed reflecter at the 14.6 M mark and used the Laser Rangefinder to measure the distance between the tip of the sensor and the mark with greataccuracy. Then we have to subtract the "Dead Zone" of the sensor for the Electrical Zero to get the actual reading. | |||
| Tape with marking of elongation stress at temperature. | ||||
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