Emerson FloBoss 107, Инструкция по эксплуатации, Страница: 29 / 152

FloBoss 107 Instruction Manual
Revised June-2017 General Information 1-23
operational). The battery and logical voltage tests ensure that the FB107
is operating in the optimum mode.
The software arms the watchdog timer every scan period. If the timer is
not armed in 6 seconds, the software automatically resets.
1.6.4 Low Power Mode
Under pre-defined conditions, the FB107 uses a sleep mode to conserve
power.
During sleep mode, the CPU powers down, although I/O continues to
accumulate. The FB107 enters sleep mode after one minute of inactivity
on the communication ports. You can disable sleep mode, which ensures
that the FB107 stays awake all the time. You configure this option (which
is
Disabled by default) on the Sleep Mode field on the CPU module’s
Advanced tab.
The FB107 wakes from sleep mode occurs when it receives either a:

Timed interrupt from the real-time clock.

Signal from one of the communication ports.
1.7 Flow Measurements
Gas and liquid calculation methods include:

AGA and API Chapter 21 compliant for AGA linear and differential
meter types.

AGA3 – Differential for gas.

AGA7 – Pulse (ISO 9951) for gas.

AGA8 – Compressibility for Detailed (ISO 12213-2), Gross I (ISO
12213-3), and Gross II for gas.

ISO 5167 – Differential.
FB107 firmware completes full calculations every second on the
configured meter run (up to four) for AGA3, AGA7, AGA8, and ISO
5167.
Note:
You must enable meter runs and adjust the number of available
meters ( ROC > Information > Device Information screen >
Points tab, AGAs field) so that additional meter runs become
available. You can also optimize a system by disabling unused
meters or PIDs.
The primary function of the FB107 is to measure flow in accordance with
the 1992 American Petroleum Institute (API), International Standards
Organization (ISO), and American Gas Association (AGA) standards.
The primary inputs used for AGA3 flow measurement function are
differential pressure, static pressure, and temperature. The differential and
static pressure inputs are sampled once per second. The temperature