Ultrasonic Level Transmitter
ULM84 Series User Manual
Dec.2020
Page 14 of 21
FAHM Co.
Industrial Automation
Doc. ULM84 Rev.99-12
Define Level Lookup Table Values (
P15 Length/ Volume Table
)
This menu is activated if in menu #12 the method of volume calculation by level based on a lookup table is
selected.
In this case, the user must apply a minimum of 2 and a maximum of 10 level / volume pairs to the
equipment, depending on his knowledge of the tank. How many level / volume pairs the user allocates to
complete the lookup table depends on their recognition and knowledge of the tank, but it is important to
apply the values in this table as follows:
1-
Enter the settings of this menu and enter the corresponding level and volume values as the first data.
2-
After confirming the values of the first level/ volume pair, enter the level value and the corresponding
volume as the second data.
3-
After confirming the above values and also up to a maximum of 10 pairs, if the user wants to continue
to complete the table, which is similar to the first two steps, apply the values in each step and by
confirming the settings, enter another pair to receive information. For example, suppose the user has
applied 6 level / volume pairs to the equipment; Then - when you go to the next menu, you will see that
the display shows the following screen:
---- Basic Menu ---
P15L7> -1.0000 METER
P15V7> -1.0000 METER3
16.342 mA
77.14%
Figure 20 - Adjusting the values of the seventh level / volume pair
At this point, if the user wants to provide information on the seventh level / volume pair, does it the same
as before; But if he concludes that it is not necessary to continue the process of completing the table, it is
required
to
simply
keep
the
newly
created
pair
(for
example,
the
seventh
pair
here)
in
the
same
state
(-1, -1);
In this way, the equipment will know that it must do the work of determining the volume of liquid in the
tank according to the previous data (here 6 pairs).
Define Liquid Level to Activate High-High Alarm (
P20 Alarm Limit HI-HI
)
The user can set a value commensurate with the level at which he expects this alarm to work; If the fluid
level exceeds the above level, this alarm will work; To return it to normal, the fluid level must be less than
the value set in the "P16 Alarm Buffer" menu
.
Also, by opening the back cover of the equipment, the user
can see the terminals of this alarm as shown in Figure 21.
Define Liquid Level to Activate High Alarm (
P21 Alarm Limit HI
)
The user can set a value commensurate with the level at which he expects this alarm to work; If the fluid
level exceeds the above level, this alarm will work; To return it to normal, the fluid level must be less than
the value set in the "P16 Relay Buffer" menu.
By opening the back cover of the equipment, according to Figure 21, the terminals of this alarm can be
seen.
Define Liquid Level to Activate Low Alarm (
P22 Alarm Limit LO
)
The user can set a value commensurate with the level at which he expects this alarm to work; If the fluid
level is lower than the above level, this alarm will work; To return it to normal, the fluid level must be higher
than the value set in the "P16 Relay Buffer" menu.
Also, by opening the back cover of the equipment, the user can see the terminals of this alarm as shown in
Figure 21.
