Measuring Range Check (In Process Conditions) - Ametek DR5200 Supplementary Instructions Manual

SERVICE
8

8.5.3 Measuring range check (in process conditions)

The complete device (the signal converter, the process connection and the antenna) is installed
on the tank in process conditions. We recommend that you use this procedure to do a measuring
range check.
CAUTION!
Make sure that the accuracy of the calibrated device agrees with the safety loop requirement.
The accuracy of the device must also agree with the reference conditions given in the "SIL-
specific technical data" section.
Procedure
• Attach the signal converter to the antenna. For more data, refer to the "How to replace device
components" section in the handbook.
• Change the level of the tank contents until you have level reference point 1 (ref_pt1
test device to make sure that you have level reference point 1. We recommend that the
location of this point is 33% of the measuring range (from the bottom of the tank).
• Measure the level at reference point 1 with the reference device (refer to "Equipment needed"
on page 23). Record the value (meas_pt1
• Change the level of the tank contents until you have level reference point 2 (ref_pt2
test device to make sure that you have level reference point 2. We recommend that the
location of this point is 66% of the measuring range (from the bottom of the tank).
• Measure the level at reference point 2 with the reference device (refer to "Equipment needed"
on page 23). Record the value (meas_pt2
• End of the procedure.
The tolerance is ±5 mm / 0.2¨ in reference conditions. If the difference between ref_pt1
meas_pt1 meas_pt1 and between ref_pt2
meas_pt1 meas_pt1
results of the test are satisfactory. If the 2 values do not agree with the tolerance, then the
results of the test are unsatisfactory. To change the device settings to get satisfactory results,
speak to the supplier.
For more data about reference conditions, refer to
25
meas_pt1). meas_pt1 meas_pt1
meas_pt2).
meas_pt2 meas_pt2
ref_pt2 and meas_pt2 meas_pt2 agrees with the safety loop tolerance, then the
ref_pt2 ref_pt2 meas_pt2 meas_pt2
www.drexelbrook.com
SIL-specific technical data
DR5200
ref_pt1). Use the ref_pt1 ref_pt1
ref_pt2). Use the
ref_pt2 ref_pt2
ref_pt1 and
ref_pt1 ref_pt1
on page 29.
DR5200-LM SIL2 Issue 2