Tokyo Keiki UFL-30, Installation & Operation Manual

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II-5
II-1. Functions
This chapter summarizes the functions of the ultrasonic flowmeter.
Please refer to Chapter II-2 ‘Operation’ for setting methods.
WARNING
1. Do not make the inner panel open when the equipment is working. High voltage parts causing electrical
shock are inside.
2. Do not take off a protective earth cable connecting front cover and enclosure.
3. Do not take off a protective earth cable connenting panel cover and enclosure.
CAUTION
Do not make the panal cover take off when the equipment is working.
Flow Display
Flow values are composed of numerical units, exponents and units of measurement. Large flow
values can be expressed by combining exponents (powers of 10).
Normally volumetric flow is the unit of measurement used, but measurement can be converted to
mass flow if liquid density is measured.
Example of display: 123,400,000 m
3
/h is displayed reflecting condition, 123. 4E+6 m
3
/h
[Numerical section]
The numerical portion of the display consists of a maximum 7 digit sequence, including
alphanumeric and decimal point although forward flow display consists of numbers and decimal
point only, no symbols. (However the maximum measurable flow value is 99999.0.)
Flow display digits and decimal point position is determined by the input rendering for the max.
forward flow value as set via the analog output setting screen. For example, the same
measurement range setting can be expressed as a 2-digit integer (2 significant digits) when you
input ‘10’, and can also as a 2-digit integer and 3-digit decimal (5 significant digits) when you
input ’10,000’.
Up to 4 decimal places are possible and an error message (INPUT ERROR) is displayed when
there are 5 or more digits, even if it is within the input range.
When measuring both forward flow and reverse flows, even if the input is 10,000 for max. flow in
the forward direction and -10 for max. flow in the reverse direction, a 5 significant digit number
(-10,000) will be displayed for reverse flow. Viewing this in another way, if a max. flow of 500,000
in the forward direction is input, a minus symbol will represent reverse flow and only a
(measurement) setting up to -99.999 is possible. (When measuring reverse flows up to -500,
please input 500.00 for forward direction flow.)
Display Digits
1 2 3 4 5 6 7
Forward Flow 5 0 0 . 0 0 0
Reverse Flow - 9 9 . 9 9 9
Forward Flow
5 0 0 . 0 0
Reverse Flow
- 5 0 0 . 0 0