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Function
Low flow cut
No Echo receiving
warning
Disturbance
detection
Zero point
correction
Span correction
Output Filter
Self-diagnostics
and
failure processing
Data retention
Check Function
8
Cuts (Zeros) flow when flow falls below prescribed instantaneous
flow rate. Used in order to avoid output of flow values other than 0
when measurement value during still flow becomes irratic.
If measurement cannot be made when no echo is received
continuously over the setting time
changed to
Display "R" on LCD.
-
Selected output operation (Analog & LCD)
-
Contact output of warning if set.
-
Count up as history on ROFF counter
-
Check whether processing values are measured properly or not
and if determined to be disturbed conditions then measuring
values are eliminated.
- Display "D" on the display
- Count up as history on DIS. counter
Zero point can be independently compensated (shifted) for flow
rate.
Slope of span line can be corrected for flow rate.
Rapid flow rate changes would be smoother by this filter.
Note: This value is meaning the time until measuring flow rate reaches 90%
by step-up increment.
If failure is diagnosed on following items, transitions to be
selected status.
Diagnostic checks:
1) Transmitting and receiving circuit
2) CPU
3) DSP
4) Internal clock
5) Memory Area (for setting parameter)
6) Parameters
- Selected analog output transition status as follows.
0% (4mA), hold, 100% (20mA), burnout (20.8mA)
- Display "ERR-**" on LCD. (** is error number.)
Contact output of warning if set.
-
Totalized flow values and all setting parameters are retained in
memory with lithium battery even if power failure.
Note:
1) Setting Parameters are retained in nonvolatile memory.
2) Totalized flow value, Logged data and ROFF/DIS. counters are retained in
memory which held by the battery.
3) Data retained in memory which held by the battery clears if battery
removed without power supply.
4) 5 year life at room temperature.
5) No battery recharging function.
Simulated flow check mode
-
Analog output check mode
-
Totalized pulse output check mode
-
, status is
(determined transition time)
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