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| | | © Siemens AG 2007 | | |
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| | | SITRANS F flowmeters SITRANS F M | | |
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| | | The effect from other temperatures can be seen from the figure. A variation in temperature from 15 °C to 55 °C (59 to 131 °F) reduces the capacity by 17% in the table from 15 Ah to 12.5 Ah. At typical revenue scenario of expected battery operation time can be seen in the table. For other scenario use the battery operation calculation program (Download from the Internet). The measurement is only completed if the system has no active fatal faults or the empty professional pipe is active. Maximum battery specification is 10 years operation. Scenario - Revenue application | | |
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| | | | | | | | | | Output A | Pulse rate max. 10 Hz | | | | Output B | Alarm or call-up | | | | Meter dialog | 1 hour per month | | | | Add-com | None | | | | Temperature profile | • 5% @ 0 °C (32 °F) | | | | | • 80% @ 15 °C (59 °F) | | | | | • 15% @ 50 °C (122 °F) | | | | | | | | | |
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| | | | | | | | | | | | | | Excitation frequency (24 h operation) | 1/30 Hz | 1/15 Hz | 3,125 Hz | 6,25 Hz | | | | One D-Cell battery 16.5 Ah Internal mains backup for 10 years operation | DN 25 ... 200 (1"...8") | 11/2 year | 1 year | 20 days | 10 days | | | | DN 250 ...600 (10" ... 24") | 1 year | 8 months | 10 days | NA | | | | Two D-Cell battery 33 Ah Internal battery pack | DN 25 ... 200 (1" ... 8") | 8 year | 6 year | 4 months | 2 months | | | | DN 250 . 600 (10" ... 24") | 6 year | 4 year | 2 months | NA | | | | Four D-Cell battery 66 Ah External battery pack | DN 25 ... 200 (1" ... 8") | 10 year | 10 year | 8 months | 4 months | | | | DN 250 ... 600 (10" ... 24") | 10 year | 8 year | 4 months | NA | | | | | | | | | | | | | |
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| | | External battery pack can be used as battery backup for mains power dispenser. Serial RS 232/RS 485 add-on industrial communication modules are designed for mains powered systems as the battery operation time will be reduced. At 1 hour communication per month (all meter data collected 2 times per day) and the module is connected, the operation time is reduced to: • RS 232 at low excitation frequency to 10% and at high excitation frequency to 80% of calculated operation time • RS 485 at low excitation frequency to 50% and at high excitation frequency to 90% of calculated operation time | | |
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| | | Siemens FI 01 • 2008 | | |
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