Toshiba LF810, Product Data Sheet

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8
Function
Low flow cut
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.
No Echo receiving
warning
If measurement cannot be made when no echo is received
continuously over the setting time
(determined transition time)
, status is
changed to
-
Display "R" on LCD.
-
Selected output operation (Analog & LCD)
-
Contact output of warning if set.
-
Count up as history on ROFF counter
Disturbance
detection
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
correction Zero point can be independently compensated (shifted) for flow
rate.
Span correction Slope of span line can be corrected for flow rate.
Output Filter
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.
Self-diagnostics
and
failure processing
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.
Data retention
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.
Check Function
-
Simulated flow check mode
-
Analog output check mode
-
Totalized pulse output check mode