User's Manual

2-44
1010NFM-3JSection 2
Maximum span values represent: Minimum span values represent:
100% of span 0% of span
Current output of 20 mA Current output of 4 mA
Voltage output of 10 Vdc Voltage output of 0 Vdc
Pulse output of 5000 Hz Pulse output of 0 Hz
Max Flow
The [Max Flow] menu cell stores the maximum range for the flow rate output (Vfo). It can be a positive
or negative value. Enter the data using the flow rate units you selected. This entry also spans the
unsigned flow variable (Vfab).
To enter the Max. Flow Range Setting:
To activate numeric entry press
Use the numeric keys to type the maximum flow rate (100% of range).
To store the data press
Min Flow
The [Min Flow] menu cell stores the minimum range for the flow rate output (Vo). It can be a positive or
negative value (to reflect bi-directional flow). However, the minimum span for the unsigned flow (Vfab)
is always zero. Enter the data using the flow rate units you selected.
To set the Min. Flow Range:
To activate numeric entry press
Use the numeric keys to type the minimum flow rate (0% of range).
To store data press
The following Span Data items are set in the same way as the two previously shown examples by
entering numeric values and storing the data.
ENT
ENT
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 between +10 GPM and -30
GPM, spans the Vfab output from 0 GPM to 30 GPM.
Vfab
Spanned Absolute
Volumetric Flow Rate:
Vs is the sonic velocity in meters-per-second (m/s) of the flowing liquid.
The min. and max. Vs entries establish the Vs span. Max Vs (m/s)
defines 100% of span. The Min Vs (m/s) defines 0% of span.
Vs
Spanned Liquid
Sonic Velocity:
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 always is lower than positive flow, whatever
its absolute magnitude. For example, for a flow measurement range of -
30 GPM to +10 GPM, the 4 mA span will be -30 GPM, and the 20 mA
span will be +10 GPM.
Vfo
Spanned Volumetric
Flow Rate: