User's Manual

FIELD EQUIPMENT
NUSEIS
Geophysical Technology Inc Field Equipment Page | 26
o The longer an NRU is deployed in a location, the better the accuracy of the GPS position
being recorded in the node. Collecting that GPS position contained in the NRU status
with the NuSite device improves the accuracy of the NuScribe databases for later
transcription of data.
o Connecting an external Bluetooth GNSS device to the NuSite device will increase the
accuracy of the positioning being stored.
o Revisiting NRUs to collect status also improves spread QA/QC.
Picking Up
• Use the retrieval tool to dislodge the NRU from the ground. DO NOT HAMMER ON THE NRU TO
DISLODGE IT.
• When picking up the NRUs, they can be undeployed in 2 different ways, either undeploy with a
NuSite tablet (refer to the steps in the NuSite manual Deploy/Undeploy section) or remove the
NRU from the ground and turn it upside down until the yellow LEDs flash (see the Undeploy
section). Undeployment is very important information that is gathered with the NuSite database
and also in the NRU ancillary data and is synchronized to the NuScribe database for use during
SegY generation.
o There may be circumstances that require an NRU to roll through several receiver point
locations prior to having data uploaded. In this case, undeployment is extremely
important between station locations for later data uploading and SegY generation.
o Never move an NRU that is still deployed and recording, to another location. Always
undeploy it first.
• It is not recommended to shut down the NRUs during pickup, but if it is required for operational
reasons, refer to the NuSite manual Shelf/Cannot Shelf section for the proper steps. Please take
note of the cautions for those steps.
• During un-deployment, a NuSite device carried with the pickup crew will receive updated status
from each NRU it visits before and after each unit is un-deployed.
Uploading
• Ideally each NRU should be brought back, after it is picked up, to the location of the NuScribe
computer and the Data Management Panels to upload data from the NRUs.
o As noted in the section above it may be, for various operational reasons, that the NRU
could roll through several receiver points prior to upload.
• Prior to uploading, ensure 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 clean towel.
• 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 if necessary but must be rinsed
off with clear water.
• Let the NRUs dry off prior to insertion into the Data Management Panel.
o Never use CRC or any other type of aerosol cleaning agent to clean the case of the NRU.