Scaling The Output Span - Universal Flow Monitors FlowStream OFS User Manual

Scaling the Output Span

Available with:
Not Available with:
This feature is for scaling the analog output to a value other than the factory calibration. For
example, for a 100 SLPM flowmeter with 4-20mA output, the output can be spanned to 20mA at
75 SLPM.
The acceptable range is 25-120% of full-scale. The formula for the span factor is:
Full-Scale x Factor = Full Span
Example: 100 SLPM x 75% = 20mA
75 SLPM = 20mA
Values above 100% mean that the output signal is attenuated. This may be desirable in cases
where the flowmeter is over-ranged up to 20% of full-scale. When the span factor is changed
from its factory setting, there will be some loss of linearity, accuracy, and output resolution.
Please consult the factory for details.
1. Press and release A1 until "SPAn" is displayed.
2. Release A1.
3. Use A1 and A2 (as shown under "Set High Flow Alarm") to type in a value that is
between 25.0 and 120.0. This is the "Factor" percentage as shown in the above formula.
4. When the desired factor is entered, press and hold A2 until "SEt" is displayed. Then
release A2.
Note 1: The LCD always displays true flow in the factory-calibrated units. Spanning the output
does not affect the LCD readout.
Note 2: If the Span Factor is set to a value that is outside the 25.0 – 120.0 range, it is changed
back to 100.0 upon exiting this menu.
FSMAN.6 081214
Low-Speed
Single-Gas
Multi-Gas
4-20mA
0-5V (1-5V)
0-10V (2-10V)
High-Speed
0-1000 Hz
200-1200 Hz
Pulse Output
Battery-Operated
Bi-directional
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