Low Flow; High S.g; Low S.g; High Base S.g - Siemens SITRANS FUG1010 IP65 NEMA 4X Instruction Manual

Section 4 1010GCNFM-3C

Low Flow

The [Low Flow] menu cell allows you to set the LO Alarm relay trip-point and the position of the LO Alarm
cursor on the Stripchart Display. The entered value must fall within the volumetric flow (Vfo) analog span
for the Low Alarm cursor to appear on the Graphic Screen.
The following Alarm Levels are set in the same way as the previously shown examples by entering nu-
meric values and storing the data.

High S.G.

This selection sets the High S.G. alarm function for the gas specific gravity.

Low S.G.

This selection sets the Low S.G. alarm function for the gas specific gravity.

High Base S.G.

The [High Base S.G.] menu cell sets the high Base S.G. alarm relay setpoint.

Low Base S.G.

The [Low Base S.G.] menu cell sets the low Base S.G. alarm relay setpoint.

High Viscosity cS

The [High Viscosity cS] menu cell sets the high gas viscosity alarm relay setpoint. The viscosity units are
centistokes with no alternatives offered.

Low Viscosity cS

The [Low Viscosity cS] menu cell sets the low gas viscosity alarm relay setpoint. The viscosity units are
centistokes with no alternatives offered.

High Temperature

The [High Temperature] menu cell sets the high temperature alarm relay setpoint. If metric units are
selected for pipe O.D., etc. the temperature units will be in Centigrade. If English units are selected, the
temperature will be in Fahrenheit.

Low Temperature

The [Low Temperature] menu cell sets the low temperature alarm relay setpoint. If metric units are
selected for pipe O.D., etc. the temperature units will be in Centigrade. If English units are selected, the
temperature will be in Fahrenheit.

Interface Vs (m/sec) and Interface SG

The FUG1010GCN gas meter continuously measures the gas velocity of sound (Vs) and computes the
gas specific gravity. Therefore, it can infer the type of gas is in the line at any given time. The Interface Vs
or Interface SG provides a facility which can cause a relay alarm to trigger in response to a change in gas
composition.
When the gas SG equals or exceeds the entered setpoint, the meter will indicate an interface SG alarm
condition. Likewise if the measure gas sound velocity (Vs) exceeds the entered setpoint, the meter will
indicate an interface alarm condition.
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