Emerson Machinery Health PR 642 Series, Installation Manual

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5 Technical data
Only specifications with tolerances are guaranteed. Data without tolerance or without
error limits are informative data and not guaranteed.
All specifications are valid for a measuring chain consisting of a sensor PR 6422, PR 6423,
PR 6424, PR 6425 or PR 6426 and one of the following converters CON 011, 021, 031 or
041 respectively an integrated converter in a MMS 3000 transmitter adjusted on it.
5.1 Measuring targets
Measuring target shafts and plain surfaces
Sensor PR 6422 PR 6423 PR 6424 / PR 6425 PR 6426
Shaft diameter >20 mm >40 mm >80 mm ---
Height of target
(measuring collar)
on the shaft >20 mm >25 mm >40 mm >80 mm*
Speed of shaft
circumference 0 ... 2500 m/s
Object material electrical conducting materials
Reference material 1.7224 (42 Cr Mo 4; SAE 4140)
* may be less for special installation of the PR 6426
Upon request,
measuring chains
can be adjusted
on the following
materials. Material Description Material Description
1.7733 24 CrMo V5 5 1.7220 34 CrMo 4
1.0060 St 60 − 2 1.7258 24 CrMo 5
1.0501 C 35 1.1181 CK 35
1.1191 CK 45 1.8519 31 CrMo V9
1.4021 X 20 Cr 13 1.4057 X 22 CrNi 17
1.4122 X 35 CrMo 17 1.4922 X 20 CrMo V12
1.6582 34 NiCrMo 6 1.7218 25 CrMo 4
Adjustments on brass, copper or other electric conducting materials are possible − in this
case differences of the specifications will apply, refer to section Measuring chain and
material of measuring target .
Installation Guide Technical data
MHM-97857 January 2020
MHM-97857, Rev 1.5 23