Thermo Scientific HB-S2000, Руководство пользователя

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Sarasota 2000 Ultrasonic Multipath
Flowmeter
Section 2, SYSTEM COMPONENTS, Page 2-5 Thermo Fisher Scientific
SYSTEM COMPONENTS
2.3.2 Core
items
The enclosure houses the following core items as well as the optional items listed in Section
2.3.3:
•
power supply and status/power management.
•
internal battery
•
central processor
•
display and keyboard
•
connectors for transducers and peripheral devices.
2.3.2.1 Power supply
The standard power supply requires a mains input between 85 and 264 volts AC, 47 to 64 Hz,
backed by an internal 12 V battery for operation in the event of AC power failure.
The fuses shown above are 3.15AT (slow blow) for the mains electricity input and 5AF (quick
blow) for the low voltage from the power supply module.
The “POWER” switch isolates the flowmeter and its internal battery from the external (AC)
power source. When switched off, the flowmeter will continue to operate from the internal
battery unless the “ISOLATE” switch is also off. The “ISOLATE” switch disconnects all power
from the flowmeter.
The internal battery is automatically charged by the power supply when external power is
being supplied and the “POWER” switch is on, regardless of the position of the ISOLATE
switch. When the external supply is off the battery is capable of operating the flowmeter for a
minimum of 24 hours. This period will be longer in cases when INTERMITTENT OPERATION
is being used.
Alternatives of 12 V dc and 24 V dc power sources are available as described in Appendix 3:
Specification.
See Appendix 3: Specification for details of power saving through intermittent operation
.
2.3.2.2 Central processor (CPU)
The central processor carries out the control and timing functions, stores and runs the
operating program and stores the data logs. It controls the status indicator, see “controls and
displays”, Section 2.5.
It also controls the three serial i/o ports. See section 2.3.2.4
2.3.2.3 Keyboard and display
The keyboard allows the operator to program the flowmeter and to display measurements,
computed results and diagnostic information via the display (see Section 2.5). These
functions may alternatively be performed via the PC based GAFA software (see Appendix 2:
GAFA Screens).