VIBRATION TRANSMITTER-VT7S12E
Ref No: mVTD/om/201
Issue No: 02
User’s Manual
- 21 -
9. CALIBRATION PROCEDURE
Calibration is provided for sensor input, Retransmission output.
First select the calibration function as described below and then follow the procedure depending on the parameter to be calibrated.
The sequences of parameters that will be available for calibration are listed below:
PV Sensor input
Retransmission output (calibration for voltage or current)
PV input sensor calibration:-
When user enters in calibration menu, DATA window shows
CAL.Z
(Calibration ZERO) for sensor input zero calibration for Vibration
Input Type. Press Increment Key, DATA window shows as per the Input feed. Feed sensor input using a calibrator, such that
process value is close to lower range value.
Note:
T
he controller allows the user to calibrate sensor‟s input anywhere in the range, but it is recommended that it should be
calibrate the input at points close to lower and upper range values.
DP of last digit will blink to indicate that the value can be changed. Use Inc/Shift key to correct the displayed reading to the desired
process value and press MENU key. The controller will display message
wait
(wait) in the DATA window to indicate that it is doing
the necessary calculations.
When the calculations are over, the new calibration values are stored automatically.
So, Zero calibration is over.
Press MENU key to calibrate other parameters or press Escape key to come out to normal operation.
DATA window shows the
CAL.S
(calibration SPAN) for sensor input span calibration for Vibration Input Type. Press Increment Key,
DATA window shows as per the Input feed. Feed sensor input using a calibrator, such that proc
ess value is close to sensor‟s upper
range value. Use Inc/Shift key to arrive at the desired process value. Press MENU key to register the changes.
The controller will display message
wait
(wait) in the DATA window to indicate that it is doing the necessary calculations.
Depending on the situation, this process may take few seconds to calibrate. Zero and Span calibration is over.
In case, the controller cannot complete the calibration due to any reason, it will hold previous calibration parameters. Calibration for
input sensor is over.
For Linear or Temperature input type If you calibrate any input from group (0-10V,0-5v,1-5V) than calibration is not required for other
input types of same group.
Retransmission output calibration (Voltage/current output) (Optional):-
In VT7S12E, maximum 2 numbers of Analog Output (Retransmission Output) are available. Analog output should be measured
using a highly accurate digital multi meter. If user wants Current output then Output current value needs to be calibrated. For
Current output calibration, set output type as 4-20 mA. If user wants Voltage output, then Output Voltage value needs to be
calibrated. For Voltage output calibration, set output type as 0-10 V.
Press MENU key repeatedly, till DATA window shows message
rtr.Z
(retransmission output zero calibration).
DATA window shows the value being outputted on Retransmission output terminals. Measure the value using a highly accurate
digital multi meter. Use Inc/Shift key to change measured value observed in multi meter on DATA window. Press MENU key. The
controller will store zero calibration value. Press MENU key to calibrate retransmission output span calibration menu.
DATA window shows the message
rtr.S
(retransmission output span calibration). DATA window shows the value being outputted
on retransmission output terminals. Measure the value using a highly accurate digital multi meter. Use Inc/Shift key to change
measured value observed in multi meter on DATA window. Press MENU key. When the calculations are over, the new calibration
values are stored automatically. Calibration for Retransmission output is over.
Press Escape key to come out to normal operation.
Note: - For Calibration of PV Sensor input it is strongly recommended digital filter (
FLTR
) parameter value should be 1
(default value).
