American Magnetics 185 & 186 Liquid Level Instruments (CE-Marked) - Manual (Page 30)

20 Rev. 3
Calibration
Calibration methods
Figure 3-2.
Calibration method selection diagram.
Instrument &
sensor purchased
together?
START
Verify sensor
specifications
Verify calibration
sticker on bottom of
instrument
Perform Open
Dewar Calibration
Is factory
calibration
correct?
Can Open
Dewar Calibration be
performed in target
liquid?
Can Closed
Dewar Calibration be
performed in target
liquid?
Perform Closed
Dewar Calibration
Perform
Approximate
Calibration
Go to Operation
Y
N
N
Y
N
Is factory
calibration
Approximate?
Y
Y**
N
** Factory Approximate Calibration should only be used if
open dewar or closed dewar calibration is not feasible in
the target liquid at the customer’s facility.
N
Can Open
Dewar Calibration be
performed in target
liquid?
Can Closed
Dewar Calibration be
performed in target
liquid?
Y
Y
N
N Y