Calibrating analog output, Rt-30ex flow transmitter, Operation and programming manual – AW Gear Meters RT-30EX User Manual
Page 30
RT-30EX Flow Transmitter
Operation and Programming Manual
30
RT-30EX User Manual, Rev. 1.7 02/07/2012
Calibrating Analog Output
The analog output can be calibrated to correct for any variances caused by the users input equipment.
The calibration routine allows the user to adjust the 4mA and 20mA output values.
The calibration routine is entered from the STATUS screen. NOTE: When entering the calibration
routine, any incoming frequency to the RT-30EX is ignored. Before starting the calibration routine,
make sure the analog output is connected to the intended readout equipment. To calibrate the RT-30EX
it is necessary to enter the analog value read from the user’s readout equipment.
From the run mode STATUS screen, press and hold the
ENT
button for 3 seconds to enter the I/O
Function programming screen. Press the
UP
or
DN
button to display the ‘Calibrate Output’ choice and
then press
ENT
.
At the first mA adjustment screen, the RT-30EX outputs the value that should equal 4mA output. Adjust
the mA value to match the value shown on the user’s readout equipment and press
ENT
when done.
At the second mA adjustment screen, the RT-30EX outputs the value that should equal 20mA output.
Adjust the mA value to match the value shown on the user’s readout equipment and press
ENT
when
done.
At the next screen, the RT-30EX outputs the corrected 4mA value. At the last screen the RT-30EX
outputs the corrected 20mA value. If either measured output is still not close enough to the required
value, enter the calibration routine again. When done, press
EXIT
until back at STATUS screen.
STATUS
L1 OFF : L2 OFF
RA 12345.67 HZ
TO 0123456789 PUL
ANLG 20.00 mA
I/O Function
> Calibrate Output
ENT
ENT
Enter measured mA
value :
04.000 mA
Enter measured mA
value :
20.000 mA
ENT
ENT
Trim Analog Out 4mA
Press ENT When Ready
Trim Analog Out 20mA
Press ENT When Ready
Measure 4mA Value
and Press ENT
Measure 20mA Value
and Press ENT
EXIT
ENT
ENT
ENT
(hold for 3 seconds)
Figure 39: Analog output calibration routine