Dynasonics TFX Ultra Transit Time Flow Meters User Manual
Page 44
Specific Heat Capacity BTU/lb °F
Temperature
Ethylene Glycol Solution (% by Volume)
° F
° C
25
30
40
50
60
65
100
–40
–40
n/a
n/a
n/a
n/a
0.68
0.70
n/a
0
–17.8
n/a
n/a
0.83
0.78
0.72
0.70
0.54
40
4.4
0.91
0.89
0.845
0.80
0.75
0.72
0.56
80
26.7
0.92
0.90
0.86
0.82
0.77
0.74
0.59
120
84.9
0.93
0.92
0.88
0.83
0.79
0.77
0.61
160
71.1
0.94
0.93
0.89
0.85
0.81
0.79
0.64
200
93.3
0.95
0.94
0.91
0.87
0.83
0.81
0.66
240
115.6
n/a
n/a
n/a
n/a
n/a
0.83
0.69
Table 7: Specific heat capacity values for ethylene glycol/water
Transducer Spacing
XDC SPAC — Transducer Spacing Calculation (Value)
ENGLSH (Inches)
METRIC (Millimeters)
OTE:
N
This value is calculated by the firmware after all pipe parameters have been entered. The spacing value only pertains
to DTTN, DTTL, and DTTH transducer sets.
This value represents the one-dimensional linear measurement between the transducers (the upstream/downstream
measurement that runs parallel to the pipe). This value is in inches if ENGLSH was selected as UNITS; in millimeters if METRIC
was selected. This measurement is taken between the lines which are scribed into the side of the transducer blocks.
If the transducers are being mounted using the transducer track assembly, a measuring scale is etched into the track. Place
one transducer at 0 and the other at the appropriate measurement.
Rate Units
RATE UNT — Engineering Units for Flow Rate (Choice)
Gallons
Gallons
Pounds
LB
Liters
Liters
Kilograms
KG
Millions of Gallons
MGal
British Thermal Units
BTU
Cubic Feet
Cubic Ft
Thousands of BTUs
MBTU
Cubic Meters
Cubic Me
Millions of BTUs
MMBTU
Acre Feet
Acre Ft
Tons
TON
Oil Barrels
Oil Barr [42 Gallons]
Kilojoule
kJ
Liquid Barrels
Liq Barr [31.5 Gallons]
Kilowatt
kW
Feet
Feet
Megawatt
MW
Meters
Meters
Select a desired engineering unit for flow rate measurements.
Rate Interval
RATE INT — Time Interval for Flow Rate (Choice)
SEC
Seconds
MIN
Minutes
HOUR Hours
DAY
Days
Select a desired engineering unit for flow rate measurements.
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March 2014