Setup > Meter > Calibration
An asterisk (*) indicates the parameter default
Calibration Submenus Options/Descriptions
FACTOR MODE
FACTORY
*FIELD
Check that
FACTOR MODE
is set to
FIELD
FACTORY SETTINGS
ZERO
The zero offset entered during factory calibration
ZERO
is for reference only and
most likely the
ZERO VALUE
for your installation will be different from the factory
ZERO
Numeric display *0 000 ns
CAL FACTOR
Numeric display # *1 000 ns
SET ZERO
SET ZERO confirmation screen Select OK or CANCEL
ZERO VALUE
Numeric display ## ### ns
SCALE FACTOR
Numeric entry
Default is 1 00
Enter the cal factor from the transducer pair into the
SCALE FACTOR
Factory Calibrated Procedure
Verify that
FACTOR MODE
is set to
FIELD
and enter the factors from the transducer into the
CAL FACTOR
settings Zero the
meter after entering the
CAL FACTOR
Set Zero Procedure
SET ZERO
removes the No Flow transit time offset This is also referred to as Zeroing the meter
Because every flow meter installation is slightly different and sound waves can travel in slightly different ways through these
various installations, it is important to remove the zero offset at zero flow to maintain the meter’s accuracy To establish
Zero flow and eliminate the offset:
1 The pipe must be full of liquid
2 Flow must be absolutely zero Securely close any valves and allow time for any settling to occur
3 Press
SET ZERO
once
Field Calibration Procedure
To calibrate the TFX-500w flow meter, use a master meter or gravimetric test stand
1 Set
FACTOR MODE
to
FIELD
2 Verify
SCALE FACTOR
is set to
1
3 Zero the meter
4 Run calibration test
5 Calculate the
SCALE FACTOR
SCALE FACTOR
= (actual flow)/(meter flow rate) or (actual total)/(meter total)
6 Enter the
SCALE FACTOR
Parameter Descriptions by Menu
Page 24
May 2021
TTM-UM-02537-EN-06