Dynasonics TFXP Series Transit Time Ultrasonic Flow Meter - Manual (Page 53)

Rev. 5/09
-3.15- TFXP
Engineering
Units
TOTAL
Exponent
Minimum
Flow Rate
13. Millions of BTUs (MMBTU)
14. Tons
(TON)
Select a desired engineering unit for flow accumulator (totalizer)
measurements.
TOTL E -- Flow Totalizer Exponent Value (Choice)
E-1 to E6
Utilized for setting the flow totalizer exponent. This feature is useful
for accommodating a very large accumulated flow. The exponent is
a ×10
n
multiplier, where "n" can be from -1 (×0.1) to +6
(×1,000,000). Table 3.5 should be referenced for valid entries and
their influence on the TFX display.
MIN RATE -- Minimum Flow Rate Settings (Value)
Rate Unit/Rate Interval
A minimum volumetric flow rate setting is entered to establish filter
software settings. Volumetric entries will be in the Engineering Rate
Units and Interval selected on pages 3.13 and 3.14. For
unidirectional measurements, set Min Rate to zero. For bi-
directional measurements, set Min Rate to the highest negative
(reverse) flow rate expected in the piping system.
Exponent Display Multiplier
E-1 × 0.1
E0 × 1 (no multiplier)
E1 × 10
E2 × 100
E3 × 1,000
E4 × 10,000
E5 × 100,000
E6 × 1,000,000
Table 3.5 — Totalizer Exponent Values
PART 3 - KEYPAD CONFIGURATION