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Observer Equipment Maintenance
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ALL Scales Require special care & maintenance Before & after each trip
Check accuracy using standard weights at LOP office (see example below)
Date: 28 Sep 2011 Observer: Kim Dietrich Trip ID: 54
Serial # and model: LOP-01 ; 2 kg Serial # and model: LOP-22 ; 50 kg platform
Standard wt (kg) Test result Standard wt (kg) Test result0.5 0.52 10 10.051.0 1.03 20 20.11.5 1.53 35 35.14
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ALL Scales Require special care & maintenance Before & after each trip (or 1X/month)
Check accuracy using standard weights at OP office
After every use, rinse with fresh water & store in a dry place
After each trip Clean thoroughly (steel wool on brass scales) Rinse with fresh water Lubricate all springs with vegetable oil Grease flatbed floating hangers with Lancote (grease)
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Hanging Scale (50kg)
Hang from 3 or 4 points to stabilize
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Brass scale – 2kg Dual units - Be
sure to use KG & NOT pounds
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Platform / flatbed scale Expensive & delicate 23 lbs – transport in yellow basket? When not in use, lock the weighing unit into
stable position (lever on side) Protect from high impact (don’t throw fish
into basket on scale) Keep as clean & dry as possible Lubricate often Move the zero adjustment daily (to prevent
from seizing
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23 lbs
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Platform
Platformlock
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Locked(up)
Unlocked(down)
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Beam balance
Beam Balance
lock
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Beam Balance
lock
Balanceindicator
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Floating hangers
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Floating hangers•Keep well greased•Rinse with fresh water & store in dry location
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Sliding weights
Zero adjustment or taring
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Sliding weightsHandle
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Always use handleto carry
NEVER use balance Beam to carry
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Upper sliding weight – 2 kg increments
Lower sliding weight – 0.2 kg increments
What’s the weight? 34.90kg
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Other equipment
Net mesh (wedge) gauge Measure 10-20 meshes – use to calculate
an average
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Acknowledgements
Thank you Rob Swanson & Karen Teig, North Pacific Groundfish Observer Program, for advice and access to flatbed scales!