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Operating Manual
MHM-97884
Table 11-12: Sensor temperature inaccuracies
Measuring range
12 mm
(Extended range factor: 3.0)
1
Stated linearity errors apply to maximum cable lengths and maximum temperatures. Linearity
errors for shorter cables and lower temperatures are lower. Contact support for details.
11.4.6
AMS EZ 1000 Converter with PR 6425
Typical accuracy of the standard measuring chain following API 670 consisting of PR
6425/010-1x0 and AMS EZ 1000 Converter with standard target material 42CrMo4 (AISI
4140) and calibration methods Automatic or Multipoint.
Table 11-13: Accuracy following API 670
Temperature range
0°C to 45°C
1
Measuring range
2
Requires previous Automatic calibration, see
sensors
The deviation from straight line (DSL) error is the maximum error (in mm) in the sensor
gap reading at a given voltage compared to a 4.0 mV per micrometer best fit straight line.
DLS errors are associated with errors in axial position or sensor gap readings.
The incremental scale factor (ISF) error is the maximum amount the scale factor varies
from 4.0 mV per micrometer when measured at specified increments throughout the
linear range. Measurements are taken at 500 µm increments. The ISF error is associated
with errors in radial vibration readings.
Basis of the data are measurements with:
•
PR 6425 cable at the temperature of the AMS EZ 1000 Converter.
•
First meter of the PR 6425 cable at the temperature of the PR 6425 tip.
•
No ambient temperature change of the AMS EZ 1000 Converter during 1 hour before
the measurement. Power and sensor connected to the AMS EZ 1000 Converter for at
least 10 minutes before measurement and calibration.
•
Emerson reference target material is 42CrMo4 (AISI 4140), unless otherwise stated.
MHM-97884, Rev. 1.8
Temperature range
-35°C to +180°C
(Operating range sensor)
-35°C to +85°C
(Operating range converter)
-35°C to +180°C
(Operating range sensor)
Automatic calibration
2
Multipoint calibration
(continued)
Additional linearity error
± 25.0%
± 25.0%
± 25.0%
DSL
1
± 4.0% of MR
1
± 1.0% of MR
Calibration – PR 6424, PR 6425, and PR 6426
Technical data
October 2023
1
ISF
± 10% of nominal value
± 10% of nominal value
117
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