User's Manual

FIELD EQUIPMENT
NUSEIS
Geophysical Technology Inc Field Equipment Page | 20
NRU-1C Preparation
Cleaning
• Make sure that the top caps of the NRUs are clean and free of mud or wet material, or a large
amount of dust.
• Dust can be removed using a dry brush or rag.
• Mud can be washed off with clean water and a brush. Do not pressure wash the NRUs.
• A very light soap/water mixture can be used to wash the NRUs but must be rinsed off with clear
water.
➢ Never use CRC or any other type of aerosol cleaning agent to clean the case of the
NRU. Use of an aerosol cleaner or chemical cleaner could result in damage to the case.
• Let the NRUs dry off prior to charging or downloading.
Charging
• See the sections for use of the Charging Panel and Portable Charging Case.
• Ensure that the NRUs are clean as stated in the section above.
• The NRU LEDs will blink yellow while charging
• The NRU should charge until the LEDs switch to a blinking green color. This indicates the battery
is charged to ~90%. The charger will now apply a top off charge to complete the charging.
• Once the battery has fully charged, the LED will change to a solid green.
➢ If an NRU shows yellow blinking LEDs for over 12 hours, or never blinks yellow when
charge current is applied, the NRU should be removed from charge and checked for
defects.
States
• Deployed – in this state the NRU is active. The NRU is recording seismic data, GPS receiver is on
at intervals, system clock is locked, and status is being broadcast via BLE.
o This state can be set during offload, parameter programming or by NuSite in the field.
See NuSite manual Deploy/Undeploy section, NuScribe manual Appendix B.
o During commissioning an NRU can be put into a deployed state then shutdown. In this
case, the NRU will need to be bumped first, but will power up in a deployed state after
acquiring GPS and running internal tests. If commissioned in the Deploy state, the NRU
will not deploy after being undeployed.
o An NRU should never be moved in a Deployed state. Always undeploy an NRU before
moving it to another location. An NRU can also be undeployed then shutdown for long
moves.
• Auto-Deploy – Deploys when bumped from low power or shutdown state. Auto-Deploy can be
used as an alternative to NuSite deployment, if NuSite is not being used on the project (line and
station being assigned in NuScribe) or if the NuSite devices will be used well after deployment of
the NRU.