TENSION CELL
A tension cell is used to monitor the towing strain on the snow streamer cable.
Two units will be used - one old, and one that was recently ordered.
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!Old tension cell
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* Model: Strainstall type 922
* Rating: 2,5 Tonne
* Sensitivity: 1.92 mV/V
* S/N 53438
* Display unit
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[[Attach:30012009361.jpg | Attach:tension-sensor.png"Tension sensor - click to enlarge."]]<br />''Tension sensor (click to see larger version).''
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Attach:display.png"Tension sensor diplay unit"<br />''Tension sensor display unit.''
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!!Calibration
<pre class='escaped'>
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Readings
Weight S/N 53438 S/N 55206
[all numbers in kg ]
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0 15 15
5 20 20
55 71
66 83 83
150 166 166
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Conclusion: This was just a functional test. The linearity is good enough for our purpose. There is an offset of 15 kg. Readings on both sensors are stable over time.
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!New tension cell
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* Manufacturer:
* Norwegian representative:
** %newwin%[[http://www.strainstall.no/ | Strainstall AS]]
** Phone: +47 33 34 61 00
* Model:
** P/N 1849S with ”eye-ends” (similar to exsiting mod. 922 unit)
* Measurement range: 0 - 2500 kg
** 10 mtr. cable
** Display unit, battery powered, model Strainstall type 5900.
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