Pressure Systems 9022 Manual do Utilizador descarregar pdf (Página 17)

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Measurement Specialties Inc. NetScanner System (9016, 9021, & 9022) User’s Manual

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1.2 Description of Instruments

The NetScanner



System family of Intelligent Pressure Scanner modules are flexible pressure

measuring devices intended for use in test and production environments. Models are available

with 12 (Model 9021/9022), or 16 (Model 9016) channels, each with individual pneumatic or all-

media transducers per channel. The most distinctive features are highlighted below:

• Pre-calibrated Transducer – a memory chip containing full calibration data is embedded

within each internal transducer (9016) or external Series 9400 transducer (9021/9022).

• Individual transducer per measurement input channel – mixed transducer ranges may be

installed in a single 9016 module or attached to a 9021/9022 module.

• Low cost per point – per—channel cost is less than a typical industrial pressure

transducer/transmitter.

• High accuracy – Model 9016 pressure scanners are capable of accuracies up to ±0.05%.

Accuracy is maintained through use of built-in re-zero, span, or multi-point calibration

capabilities. Model 9021/9022 pressure scanners provide accuracies better than ±0.10%

FS. Accuracy is maintained for six (6) months after calibration.

• Low thermal errors – each internal transducer and each external 904x transducer contains

an individual temperature sensor and thermal calibration data for internal use by software

correction algorithms. Thermal errors are reduced as low as ±0.001%FS/° C over the

calibrated temperature span.

• Re-zero upon demand (Models 9016) — an integrated calibration valve allows for

automatic re-zero adjustment calibration of dry gas transducers to null offset drift

errors.

• Ease of transducer replacement — factory calibrated transducer assemblies may

be stocked and rapidly replaced in the field. Storage of thermal coefficients

within the transducer allows for ‘plug and play’ transducer replacement.

• Ease of calibration — each 9016 module contains a pneumatic calibration

manifold and software commands to automatically perform re-zero, span, and

multi-point adjustment calibrations. New offset and gain coefficients that result

from the most recent calibration may be stored in non-volatile transducer memory.

• Measurement flexibility — each 9021/9022 module is capable of measuring

general purpose voltage signals on any channel not populated with a 9400-type

transducer. Full-scale ranges of ±50, ±100, ±250 and ±4500 mV are supported

through programmable gain amplifier circuitry.

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