How To Change The Scale Factor - Euromag Eurosonic 2000 User Manual

3.12 HOW TO CHANGE THE SCALE FACTOR

A scale factor is the ratio between the 'actual flow
rate' and the flow rate measured by the flow meter. It
can be determined by calibration with standard flow
calibration equipment. You may change the scale
factor in menu window M45.
The scale factor is transducer dependent. Prior
to shipment from the factory, the scale factor of a
transducer pair is calibrated on a pipe with water
flowing inside. If you ordered multiple pairs of
transducers, be sure you entered the scale factor of
the transducer pair you are using.
The scale factor is also affected by other factors such
as pipe size, fluid viscosity, installation variation, etc.
It is therefore recommended to do on-site calibration
when accuracy is of crucial importance.
3.13 HOW TO USE THE PASSWORD LOCKER
The password locker provides a means of preventing
inadvertent configuration changes or totalizer resets.
When the system is locked, the user can still browse
menu windows, but cannot make any modifications
on the windows.
The password locking / unlocking is done in window
M47. The system can be locked without a password
or with a password consisted of 1 to 4 digits.
For no-password locking / unlocking, just press
key in window M47.
If the password is forgotten, please contact the
manufacturer.
3.14 HOW TO USE THE KEYPAD LOCKER
First, switch to the menu window which will be
displayed after the keypad is locked.
Then, press
Press and enter a 1-8 digit long password.
to switch to menu M48.
Password should be numerical only. Press
to set the password. The system will return to the
previously selected window automatically.
3.15 HOW TO USE SCHEDULED DATA OUTPUT
Data can be sent to RS232 serial port by a preset
schedule.
The data items to be output are selected in M50.
Switch to menu M50, select "ON", followed by data
items, then press . If you do not want to output
data through RS232, select "OFF" in M50 and press
.
The output time, interval and last period are set in
window M51. Refer to the next chapter for details on
M51.
3.16 HOW TO USE 4-20MA CURRENT LOOP OUTPUT
The accuracy of the current loop output is better than
0.1%. It can be configured to different mode, such as
4-20mA mode, 0-20mA modem, etc. Mode selection
can be made in menu M55. Refer to the next chapter
for details on M55.
In order to use the 4-20mA output function, you need
not only select the mode to be 4-20mA in M55, but
also set the flow rate values which correspond to the
minimum current (4mA) and the maximum current
(20mA). Enter the two values in M56 and M57.
Example A: flow rate range is 0-500m3/h. Just enter
0 in M56 and 500 in M57.
Example B: flow rate range is -500-0-1000m3/h. If
flow direction is not an issue for you, you may select
20-4-20mA mode in M55. Then, enter 500 in M56
and 1000 in M57. If flow direction is an issue, you
may select 0-4-20mA mode in M55. This means that
the current loop will output 0-4mA when flow rate
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