Siemens FUG1010 IP65 NEMA 4X, Руководство по эксплуатации, Страница: 112 / 271

Functions
7.5 Span Data
FUG1010 IP65 NEMA 4X
Operating Instructions, 01/2013, A5E02951519-AC
111
7.5 Span Data
The [Span Data] menu allows you to set 0% and 100% output limits for volumetric flow (Vfo),
absolute flow (Vfab), sonic velocity (Vs) and specific gravity (Vsg). Each menu cell shows
appropriate rate units and time base. If you change flow rate units after spanning the system,
the computer automatically updates the output data setup to reflect the change. Span limits
apply to both the analog outputs and the on-screen strip chart. The flow outputs operate as
follows:
Vfo
Spanned Volumetric or Mass Flow:
The minimum and maximum flow rate entries establish
the Vfo span. The [Max Flow] menu cell sets 100% of
span. The [Min Flow] menu cell sets 0% of span. Use
signed numbers for bi-directional spanning. Note that
negative (reverse) flow is always lower than positive
flow, whatever its absolute magnitude. For example,
for a flow measurement range of -30 CF/M to +10
CF/M, the 4 mA span will be -30 CF/M, and the 20mA
span will be +10 CF/M.
Vfab
Spanned Absolute Volumetric Flow Rate:
Vfab is the absolute magnitude of the volumetric flow
rate (Vfo). There are no menu cells provided to span
this output. Vfab shares the Vfo span entries. The Vfab
minimum span is always zero. The maximum span for
Vfab is the largest absolute value of either the min or
the max flow rate (Vfo) entries. For example, a span
b10 CF/M and -30 CF/M, spans the Vfab
output from 0 CF/M to 30 CF/M.
Vs
Spanned Gas Sonic Velocity: Vs is the sonic velocity in meters-per-second (m/s) of
the flowing gas. The min and max Vs entries establish
the Vs span. Max Vs (F/S) defines 100% of span. The
Min Vs (F/S) defines 0% of span.
Vsg
Spanned Gas Specific Gravity: Vsg is the inferred operating specific gravity of the gas.
The min and max Vsg entries establish the Vsg span.
Max Vsg defines 100% of span and Min Vsg defines
0% span.
Maximum span values represent: Minimum span values represent:
100% of span
Current output of 20mA
Voltage output of 10 VDC
Pulse output of 5000 Hz 0% of span
Current output of 4mA
Voltage output of 0 VDC
Pulse output of 0 Hz
To change the default Span Data settings:
1. At [Meter Type], press <Right Arrow> to [Dual Path Flow] and press <ENTER>.
2. At [Chan/Path Setup] press <Right Arrow> to <Clamp-on> and press <ENTER>.
3. At [Clamp-on] menu scroll down to [Span/Set/Cal] and press <Right Arrow>.