TC26-9
4-20mA Calibration
b)
Refers to the “TC” S/W operating manual
The TC26-9 calibration can be done in two different ways
:
a)
By means the P1 and P2 push-buttons.
b)
With PC or PLC soft. communication with RS485 port.
a)
To calibrate by-means 2 push-buttons P1 and P2 (see figure), needs to lodge the “TC26-29” into the head connection of the
capacitance sensor and to install into the vessel or tank to be measured.
Depends to the possibility to reach easily 0% and 100% level is possible to use “Full-Empty Calibration” or , when 0% and
100% level can’t be reached the “High and Low-point Calibration” methods can be used, see fig.8.
fig.8
Full, Empty Calibration(fig.9)
The TC26-9 transmitter can be calibrate in
respectively at the level of 0% and 100%
level, in order to memorise the relevant
capacity electronically.
In the measuring mode, the TC has the
Mode LED flashing.
To calibrate 0% (4mA)
needs to have the
level at the 0%.
Press simultaneously P1 and P2, release
them and verify that “Mode led” will stay fix
lightened.
Press two times P1. The measured
capacity has been memorised and
associated to 4mA output.
Press simultaneously P1 and P2 again to
switch in measure mode (Mode led
flashing.
To calibrate 100% (20mA)
needs to have
the level at the 100%.
Press simultaneously P1 and P2, release
them and verify that “Mode led” will stay fix
lightened.
Press two times P2. The measured
capacity has been memorised and
associated to 20mA output.
Press simultaneously P1 and P2 again to
switch in measure mode (Mode led
flashing.
Important!
The calibration can be done first with
empty and than with full (as the above
procedure) or first with full and than with
empty as well.
fig.9
Full(100%), Empty(0%) Calibration
