12-Bit 4-20 mA Input Adapter
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Maintenance
With normal usage, if the adapter is installed correctly, the adapter’s circuitry is protected against
excessive moisture and does not require any maintenance or cleaning. However, in an unusually wet
environment, excessive moisture can collect in the logger enclosure and adversely affect measurement
accuracy and communications in the adapter module.
The circuit board is conformal coated to provide limited protection against moisture, but if you observe
heavy condensation, consider the following options:
•
Verify that the logger is installed properly and sealed according to the instructions given in the
HOBO Weather Station User’s Guide
or the
HOBO Micro Station User’s Guide.
•
Consider moving the logger to a location that is better protected from moisture, is better
ventilated, or receives some sunlight to help keep the logger dry.
•
Apply WD-40, LPS 1, or 711 to the six-position terminal block and the modular connectors to
displace moisture and help prevent corrosion. (Other spray lubricants may be appropriate; check
product labeling to ensure that it is safe to use on plastics and electronics.)
Verifying Accuracy
You should check the accuracy of the 12-Bit 4-20 mA Input Adapter annually. Verify the accuracy of the
input adapter against a known standard, such as a calibrated current source. If it is not providing accurate
data, it may have been damaged. If you are unsure of the input adapter accuracy, you can send it back to
Onset for re-certification. Contact Onset or your place of purchase for a Return Merchandise
Authorization (RMA) number and associated costs prior to sending it.
Warranty
This product is warranted to be free from defects in material and workmanship for a period of one year
from the date of original purchase. During the warranty period, Onset will, at its option, either repair or
replace products that prove to be defective. This warranty is void if the Onset products have been
damaged by customer error or negligence, or if there has been an unauthorized modification.
Tune-up Service
Onset will examine and re-test this input adapter. A tune up fee may be charged.
© 2003 Onset Computer Corporation. All rights reserved.
Onset and HOBO are registered trademarks of Onset Computer Corporation.
Part #: MAN-C-CIA
Document #: 7583-A
