Product application, installation and service manual
ELIS PLZE
Ň
a. s.
Ultrasonic Flow Meter SONOELIS SE 4015 and SE 4025
Page 25 of 44
ELIS PLZE
Ň
a. s., Lu
č
ní 15, P. O. BOX 126, 304 26 Plze
ň
, Czech Republic, tel.: +420/377 517 711, fax: +420/377 517 722
Es 90 337 K/c
6.2.2.7 Definition of limit values
LIMIT VALUE
Here the operator can set altogether 11 (limit) values of parameters. The detailed description of the procedures
concerned is shown in Fig. 24. Select the desired parameter by push-button T1 and confirm the selection by T4. The
name of the parameter and the associated measuring unit will then appear on the first line of the display and the
second line will show the previously defined limit value (with the exception of the date and time). The limit value unit
shall always be the same as that selected for data display. For example, if the volume flow rate is displayed in litres per
second, the limit value of volume flow rate shall also be defined in l/s. If the mass flow rate measurement mode is
selected and the data are displayed in metric tons, the impulse number shall also be defined in t.
Upon depressing push-button T2, the previously set limit value will disappear from the second line and 0 will be
displayed in the first digit position. Use push-buttons T3 and T2 to set the digital value and T1 to insert the division
signs (a comma in the position of a decimal point, dot in the date and colon in the case of time).
The day in the week information is to be set as follows:
0 – Sunday
1 – Monday
2 – Tuesday
3 – Wednesday
4 – Thursday
5 – Friday
6 – Saturday
A figure entered may have up to seven digits. The date and time data shall include initial zeroes; e.g. the date of 3
July, 2001 shall be recorded as 03.07.01 and the time 7 minutes past 9 a.m. as 09:07:00. Confirm the selection by
depressing push-button T4. In the case of a commercial (invoicing) meter, neither q
s
, impulse number or sensitivity (low
flow cutoff) can be reset by the user as these settings are reserved to the duly authorised testing authority. Therefore,
for commercial meters, these parameters will not appear on the list of limit values to be reset.
List of parameters (limit values, date and time)
Qmax
Maximum (overload) flow rate q
s
in the given measuring units
ICIS
Impulse number, defining fluid volume or mass (in selected units) per one impulse at the impulse
output
Date
The actual calendar date
Day of the week The actual day of the week
Time of the day The actual time of the day
Low flow cutoff
The flow rate level, in per cent of q
s
, below which the meter will display and at its outputs indicate
zero flow rate
Vol. flow limit
Maximum volume flow rate level; where a binary output is associated with this parameter, it will
indicate values exceeding this limit
Mass flow limit
Maximum mass flow rate; where a binary output is associated with this parameter, it will indicate
values exceeding this limit
Volume limit
Maximum aggregate volume; where a binary output is associated with this parameter, it will
indicate values exceeding this limit
Mass limit
Maximum aggregate mass; where a binary output is associated with this
parameter, it will
indicate values exceeding this limit
Temp. limit Maximum temperature; where a binary output is associated with this parameter, it
will indicate values exceeding this limit value.
Comment: The limit values for all the above parameters shall be given in units selected using the procedure described
in section 6.2.2.4 above. Should new parameter units be selected, the limit values need be re-defined accordingly;
otherwise the meter function would be incorrect.
