LOAD
0 to 50 mV
POWER
SUPPLY
TRANSMITTER
Figure 8: Voltage (0 to 50 mV)
OPERATION
The sensor offset can be changed through the TBU-00 software. The USB cable may
be connected to the transmitter without causing any measurement errors. See item 5
Zero Offset on the first page of this manual.
The user must choose the most suitable sensor and range to the process. The selected
range must not exceed the maximum range of measurement defined for the sensor
and should not be smaller than the minimum range for the same sensor.
Note:
The transmitter accuracy is based on the maximum range of the sensor used,
even when a narrower range is programmed.
Example:
• The Pt100 sensor in the range 0 to 100°C and accuracy of 0.12%, the maximum
error will be 1.02°C (0.12% of 850 °C )
• The Pt100 sensor in the range of 500 to 600°C and accuracy of 0.19%, the maximum
error will be 1.61°C (0.19% of the 850°C )
Note:
When the measurements are made at the transmitter, ensure the Pt100
excitation current required by the calibrator is compatible with the Pt100 excitation
current used in the transmitter: 0.8 mA.
SAFETY INFORMATION
Any control system design should take into account that any part of the system has the
potential to fail. This product is not a protection or safety device and its alarms are not
intended to protect against product failures. Independent safety devices should always
be provided if personnel or property are at risk.
Product performance and specifications may be affected by its environment and
installation. It’s the responsibility of the user to assure proper grounding, shielding,
cable routing, and electrical noise filtering are in accordance with local regulations,
EMC standards, and good installation practices.
SUPPORT
This product contains no serviceable parts inside. For troubleshooting, visit our
frequently asked questions at www.dwyer-inst.com or contact our technical support
team at 1-800-872-9141.
MAINTENANCE/REPAIR
Upon final installation of the Model TBU, no routine maintenance is required. The
Model TBU is not field serviceable and is not possible to repair the unit. Field repair
should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact
customer service to receive a Return Goods Authorization number before shipping the
product back for repair. Be sure to include a brief description of the problem plus any
additional application notes.
