T-Chain Guidelines And Design Rules Brochure

T-Chain Guidelines and Design RulesCustomer Requirements will vary. Some guidelines are listed below.Guidelines• The T-Chain is not intended to be tension bearing. It is intended that this chainbe attached via cable ties to a tensioned member such as a cable. Plastic ropecan also be used, but the rope must not stretch under tension to the point wherethe attached temperature chain is loaded. The T-Chain should be attached bycable ties located a few inches from each node.• A simple deployment is to attach a surface buoy via a short length of cable orrope to the top of the birdcage. Then attach a cable or rope to the other side ofthe birdcage with sufficient length to reach the weight on the bottom. Thetemperature chain is then attached to the cable. In this configuration, tensionpasses through the birdcage, which will support a light tension.• If large tension is desired, then the same arrangement can be used except thatthe birdcage should be attached parallel to the cable at both its top and bottompoints. Care should be taken to attach the birdcage in a way that allows 3rd partysnagged lines to be pulled along the chain to the surface.• The upper end of the temperature chain should be secured to the birdcage withcable ties so that it does not rub or flex in response to currents or wave motions.• The deployment method must recognize that the logger must be accessed torefresh batteries and obtain measurements.Design RulesMaximum Depth of a Sensor 165 metersMaximum Span between Sensors 30 metersMinimum Span Between Sensors 25 centimetersNumber of Sensors No Limit