Proservo NMS81
Endress+Hauser 39
Custody transfer approval
Ordering feature 150
"Accuracy, Weight +
Measure Approval"
1)
Accuracy properties
ICR Standard version (±1 mm), without calibration certificate
ICW Standard version (±1 mm), 3-point calibration certificate
ICX Standard version (±1 mm), 5-point calibration certificate
NTA Maximum performance (±0.4 mm), type approval according to NMi, OIML
R85, API 3.1B, ISO4622, factory calibration certificate
NTC Custody transfer (±1 mm) type approval according to NMi, OIML R85, API
3.1B, ISO4622, factory calibration certificate
PTA (in preparation) Maximum performance (±0.5 mm), PTB type approval, factory calibration
certificate
PTA (in preparation) Maximum performance (±0.4 mm), PTB type approval, factory calibration
certificate
PTC (in preparation) Custody transfer (±1 mm) type approval per PTB, factory calibration certificate
1) Position 25 to 27 in the order code (e.g. NMS8x-xxxxxxxxxxxxxxxxxxxxxxxxICR...)
• Depending on the displacer (ordering feature 120) some of these versions will not be
available.
• Proservo NMS8x that are certified for Custody Transfer applications are calibrated on a
certified production rig. The production rig reference standard is a laser tracker with an
absolute accuracy of ±0.010 mm and a resolution of 0.0002 mm. Calibration is performed at
10 equally-spaced measuring points over the full measuring range (up to 40 m (131 ft)).
Additionally, hysteresis is checked at three points.
• The Maximum Permissible Error (MPE) is 0.4 mm (0.016 in) for maximum performance
models, and ±1 mm (±0.04 in) for custody transfer models. The resultant factory calibration
certificate is included in the scope of delivery along with the respective type approval
certificate.
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