Sponsler IT400, Руководство по установке и эксплуатации, Страница: 16 / 40

Liquid Controls
Sponsler, Inc.
IT400 Remote Totalizer & Rate Indicator Page: 13 DOC#: MN-IT400-R2c.doc
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Internal Battery functions either as a primary power source or as a backup to either of the
external power sources. Battery life estimates are in the Power Mode chart below and are
affected by the options enabled. The battery may be replaced at any time with the only side
effect being a loss of normal operation (all calibration and configuration information is
maintained). Total, Grand Total, and service hours may be saved at any time by activating the
Grand Total display or by entering the menu system. Upon system startup, the saved values
will be retrieved.
External
DC
Loop
Isolation
Battery
Powered
SW5-1 SW5-2 SW5-3
Main
IT400
Power
Modulated
Carrier
Power
Yes Yes* No Off Off On External External
No No** No On On On Loop Loop
No No** Yes On On Off Battery Loop
*For External power, the loop isolation switches SW5-1, 2 must be “ Off ” (isolated).
** Loop powered operation; the loop isolation switches SW5-1, 2 must be “ On ” (non-isolated).
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Power Mode: controls the refresh rate of both the display and outputs of the IT400 and is a
user selectable menu item. Refresh times and approximate battery life are in the following
table:
Mode Refresh Input frequency
Approximate
Battery (years)
1 16 refreshes/s
0
500
2 8 refreshes/s
0
500
3 4 refreshes/s
0 6.5
500 3.2
4 1 refreshes/s
0
500
5 2s/refresh
0
500
*Battery life calculations are worst case based on continuous flow, enabled linearizer,
temperature compensator, 4-20mA output, and pulse output.
Enclosure
The IT400 is contained in an explosion proof enclosure. This enclosure is typically meter mounted
via a union or a temperature extension (consult factory for lengths and applications). There is
typically a short cable (4 feet) that connects the
IT400 to an external temperature probe (a few inches
downstream). Rigid conduit is recommended for this connection to maintain the explosion proof
rating of the enclosure and to maintain CE marking.