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...
Service
Why does the specified range of the ECO BB sensors (expressed in m^-1) not match the maximum output calculated from my calibration sheet (expressed in m^-1 sr^-1)?
The back-scattering measurements are a portion of the total beam attenuation coefficient of the water being sampled. The beam attenuation is measured during the back-scattering calibration. Therefore, the range specification on the data sheet for the BB sensor (0 – 3...
How should I store the ISFET pH probe on my Navis BGC float? What should I do before testing and deploying it?
The pH sensor will be shipped dry but was pre-conditioned in seawater (generally from Pacific Ocean waters near Hawaii). While conditioning and evaluating the pH sensor, only expose it filtered, sterilized natural seawater. Do not use seawater CRMs (Certified...
How will cell fouling / contamination affect the conductivity / salinity data of a Sea-bird CTD?
Cells that have been contaminated with foreign material generally read low of the actual conductivity. Your zero (in air) conductivity reading is generally unaffected. The conductivity error due to fouling will generally be proportional to the conductivity value....
What maintenance can a user perform in the field on my ECO sensor’s wiper and optics face?
The primary maintenance procedures that are outlined in the manual are for the bio-wiper (shutter) installation, the internal battery replacement and the bulkhead connector inspection. The shutter replacement is not always necessary; however, having the copper shutter...
Why do some older CTDs have an RTC calibration in addition to the temperature, conductivity, and pressure calibrations?
An RTC (real time clock) is an electronic component which maintains an accurate time reference for the CTD. In the past, clock chips could be periodically calibrated to account for slow drift. As of the early 2000s, Sea-bird has been using components with improved...
My SUNA nitrate sensor is not transmitting or storing valid nitrate concentration data in high sediment, high turbidity, low light transmission environments, or freshwater inrush events. What can I do to mitigate this?
SUNAs ordered with the 5mm path length coupler as a factory option will perform much better in low light transmission waters due to the shorter length the light needs to travel leading to less absorption. Equipping your SUNA with the factory bio-wiper option will also...
How can I determine if an SBE9 or SBE9plus CTD is compatible with a specific SBE11 or SBE11plus deck box?
There are several considerations when determining whether the deck box and CTD underwater unit will be compatible. (1) In most cases (with the exception being (2), below), instruments with the "-plus" designation are compatible with each other, but the "-plus"...
When should the SUNA (V1 or V2) be sent in for service to get the lamp replaced?
When your max lamp counts drop below 30,000 during the self test and cannot recover with cleaning, you can send the lamp in for inspection. If your lamp time remaining is less than 25% then it is best to send the SUNA in for a lamp replacement. We will automatically...
When should the SUNA (V1 or V2) be sent in for service to get the lamp replaced?
When your max lamp counts drop below 30,000 during the self test and cannot recover with cleaning, you can send the lamp in for inspection. If your lamp time remaining is less than 25% then it is best to send the SUNA in for a lamp replacement. We will automatically...
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