The SUNA V2 has capacitors that maintain internal power for to the electronics long enough for a proper shutdown process when external power is removed. However, these capacitors must completely discharge between power cycles, or else the SUNA may fail to properly...
Field Procedures & Deployment
How do I use Polled Mode of Operation on my SUNA?
The polled mode setting allows the user to program the SUNA to sample when a command is sent. Customers who would like to integrate an SDI-12 controller with their SUNA should use the polled mode setting. Please note that the SDI-12 operation is not available on SUNA...
Can I program my SUNA to start at a preferred time?
Unfortunately, users cannot currently program their SUNA to start at a preferred time. As soon as the SUNA is powered, the instrument will begin it’s programmed sampling mode on the hour. Users can use the offset feature to change the start time. For example, an...
How do I use Continuous Mode on my SUNA V2?
The continuous mode setting allows the user to program their SUNA to run continuously for an indefinite amount of time. When power is supplied to the SUNA, it will start data acquisition without an end time or maximum number of frames to measure. In general, we do not...
How do I use Periodic (Autonomous) Mode on my SUNA?
The periodic mode setting allows the user to select how often, and how long sample intervals are based on frame-based or time-based operation. For example, if a user would like to program their SUNA to sample every two hours, they would use a sample interval of two...
Why is my SUNA V2 reading high humidity? What effects does that have on the data?
High humidity is often signs of a leak- the SUNA V2 is sealed at the factory and is not meant to be opened outside of service, and an internal desiccant should prevent any moisture left over after assembly from affecting the electronics. In the case that your self...
Can the SBE9/11+ system have a video camera feed or other data sources integrated into its sea cable?
The SBE9/11+ system does not have the capability to support any instrumentation data or signals via its sea cable that are not directly connected to the SBE9+ CTD and associated carousels. There is a hardware upgrade on the 9/11+ system that provides a serial RS-232...
When should I replace my pH electrode on my SBE 18 or 27?
The lifespan of the probe is typically between 3 months and 2 years, depending on where and how often it is deployed, storage conditions, and the particular electrode performance. It is a good idea to periodically check the storage solution to make sure that it is...
What is the effect of temperature drift on practical salinity for my CTD?
Temperature and Conductivity are two of the most important values taken into consideration when our instrument calculates the practical salinity of seawater. When one sees a change in a measured value, such as temperature, that change will affect your salinity reading...
What are is the recommended temperature ranges for CTD storage between deployments?
In general, the best practice is to store instruments at temperatures above freezing (0 degrees C), and below 35 degrees C (keeping out of direct sunlight while on deck whenever possible). It is best to minimize exposure at high temperatures, as this could contribute...
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