Dwyer TFM-LP - Manual (Page 19)

F-20-TF-L, pg. 19 of 30
7. Calibrating Units for Different Liquids
The TF Series for liquids will operate with most translucent liquids subject to
compatibility of the wetted parts. Best results are obtained with low viscosity
(less than 10 centistokes) liquids. For information regarding higher viscosity
liquids, contact Dwyer Customer Service.
Units are calibrated with deionized water as the reference media. Using
other liquids will affect the calibration. The amount of calibration error will
depend on the characteristics of the liquid being flowed.
The error in flow reading (or calibration) should be calculated and utilized
as detailed in section 6 above.
D. Maintenance and Product Care
1. General
CAUTION: Do not disassemble your flow meter or flow sensor
for any reason. If the unit appears to be malfunctioning please
contact Dwyer Customer Service.
The TF Series of flow sensors require no periodic maintenance if used within
the recommended specifications.
The next recommended recalibration date is stated on the calibration
certificate supplied with the unit. Please contact Dwyer Customer Service for
further information.
Inlet filters should be periodically checked and cleaned / replaced as
necessary.
Regularly check all electrical and process connections for damage or
deterioration.
If the sensor is to be stored, keep both the inlet and outlet ports sealed.
Do not store a sensor with any chemical other than water (or air) inside it
over an extended period of time. Prolonged exposure to chemicals other
than water may lead to precipitation or corrosion.