TFM VT-222 Vortex Flowmeter User Manual
Frequency test mode
1. After selecting the frequency test menu, the interface prompts "frequency test", the unit is Hz, and the
second line initially prompts 0. It doesn't go into test mode at this point.
2. After inputting the new frequency and saving it, after selecting the current test menu, the interface
prompts "current test", the unit is mA, and the second line initially prompts 0. It doesn't really go into test
mode at this point. Enter the test mode, at this time the instrument outputs the specified pulse frequency
value. The backlight flashes to remind the operator that it is in the test mode at this time. If there is no key
operation within 10 minutes, it will automatically exit.
Current test mode
1. After inputting the new current value and saving it, it actually enters the test mode, and the meter outputs
the specified current value at this time. The backlight flashes to remind the operator that it is in the test
mode at this time. If there is no key operation within 10 minutes, it will automatically exit.
Loop current calibration
Custom units
The current custom unit is fixed at **/s. Change the custom unit to 3, namely SPC/h, SPC/m, SPC/s. The user can
set the corresponding unit through the key or RS485 communication.
When the instantaneous flow unit is set, the cumulative flow unit is also automatically determined. The
corresponding relationship table is below:
Instantaneous flow unit
Corresponding total flow unit
Nm
3
/h
，
Nm
3
/m
，
Nm
3
/s
Nm
3
m
3
/d
，
m
3
/h
，
m
3
/m
，
m
3
/s
m
3
l/h
，
l/m
，
l/s
L
Scf/s
，
Scf/m
，
Scf/h
，
Scf
cf/s
，
cf/m
，
cf/h
，
cf
USG/s
，
USG /m
，
USG /h
，
USG
UKG/s
，
UKG /m
，
UKG /h
，
UKG
bbl/h
，
bbl/d
，
bbl
TFM VT-222 Vortex Flowmeter Quick Manual Rev 10f page 12 of 30
