Ametek Drexelbrook ThePoint Series, Installation And Operating Instructions Manual, Page: 20 / 70

ThePoint Series
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2.10 Calibration
ThePoint™ level measurement switch features both Auto-Cal
and manual calibration. The standard Auto-Calibration mode is
applicable to most liquid and slurry point level measurements.
If preferred, the manual calibration can be used and is
recommended for some application. ThePoint electronic unit
has auto and manual calibration modes built into the standard
unit and can be accessed through a simple routine (see section
2.10.4). The inclusion of these calibration modes allows the
Drexelbrook RF Point Level Products application flexibility
that is far greater then any other point level product on the
market. This RF Point Level switch can be used in Liquids,
Solids, Slurries, and Interface applications.
2.10.1 Selecting the Calibration Mode for your application.
The following table is a list of measurement types and the
recommended calibration mode for each of these applications.
ThePoint has eight calibration modes however; only four are
used on the majority of applications.
ThePoint will be shipped in the standard Auto-Cal mode #2
unless pre-ordered in a specific mode. To determine if the
ThePoint has been shipped in a mode other than #2, look at the
label on the inside of the unit housing. The model number will
start with P X L1. The “ X ” indicates the pre-set mode typically
an “L” for mode #2.
Common Calibration Modes
Mode 2 = L - Fixed Cal 2pF: 2pF differential, set point locked
2pF above starting capacitance
Mode 6 = P - Fixed Cal 0.5pF: 0.5pF differential, set point
locked 0.5pF above starting capacitance
Mode 7 = M - Manual calibration standard sensitivity – pots
adjusts from 0 to 65pF
Mode 8 = G - Manual calibration High sensitivity – pot adjusts
from 0 to 27 pF
Additional calibration modes for specialty applications
(consult factory)
Mode # 1 = N Auto Mode 2pF
Mode # 3 = T Auto Mode 10pF
Mode # 4 = V Auto Mode 10pF
Mode # 5 = H Auto Mode 0.5pF
For explanation of mode See Section 2.10.4