RBR quartz3 BPR zero, Инструкция по эксплуатации инструмента

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RBR#0008819revA – 6
5 RBRquartz BPR|zero
5.1 Overview - RBRquartz BPR|zero
5.1.1 Description
The RBR quartz ³ BPR | zero is a special version of the robust RBR quartz ³ BPR implementing an internal quartz barometer
and a switching valve. The novel AzeroA technique is used to provide in-situ reference measurements to correct for long
term drift in the Paroscientific Digiquartz® pressure gauge. Configured with one or two Digiquartz® pressure gauges, an
internal barometer is used in conjunction with a hydraulic manifold to periodically make reference measurements of
internal housing pressure. This instrument is intended for deep water, long-term deployments where high stability and
resolution of absolute pressure measurements are critical. The RBR
quartz ³ BPR | zero may be supplied with external
power from RBR fermata (power) or RBR cervata (power and memory) canisters or cabled to an observatory for external
power and realtime data access.
The RBR quartz ³ BPR | zero uses the AzeroA technique to assess drift in the Digiquartz® pressure gauge. This is done by
periodically switching the applied pressure that the gauge measures from seawater to the atmospheric conditions
inside the housing. The drift in quartz sensors is proportional to the full-scale rating, so a reference barometer - with
hundreds of times less drift that the marine gauge - is used to determine the behaviour of the marine pressure
measurements.
5.2 Specifications - RBRquartz BPR|zero
Physical
Weight:
~30kg in air (one Paros)
~18kg in water (one Paros)
Size:
~750mm x Ø140mm
Housing:
Titanium
Depth rating:
7000 m
Operational temperature:
-20°C to 50°C*
Storage temperature:
-20°C to 50°C