Dwyer ULT - Manual (Page 6)

TanK MenU
If the tank dimensions are known these menu item can be used
to set the 4 and 20 mA points manually. See Figure 6 below.
Press inDeX to advance to the next menu item. Press enTeR
to retain the value.
HeiGHT
Sets the 4 mA value. Program as the distance from the
transducer face to the 4 mA value desired (normally
the bottom or lowest value of the tank). Factory default
is the maximum range of the model. Use the Up and
DOWn buttons to change the value in the length units
the unit has been programmed for. The programmed
value can be anywhere in the range below fiLL
HeiGHT. If reverse mA is used then this will become
the 20 mA value.
fiLL HeiGHT
Sets the 20 mA value. Program as the distance from the
HeiGHT (normally the bottom of the tank) to the 20 mA value
desired. Factory default is the maximum range of the model
minus the blind zone distance of 8˝ (20 cm). Use the Up and
DOWn buttons to change the value in the length units the unit
has been programmed for. The programmed value can be any-
where in the range above HeiGHT. The maximum value for
fiLL HeiGHT is the maximum range of the unit minus the blind
zone distance of 8˝ (20 cm). The blind zone distance is auto-
matically subtracted from the fiLL HeiGHT value programmed.
If reverse mA is used then this will become the 4 mA value.
HeLp
Displays a guide to the menu items in this menu. Press enTeR
to display.
eXiT
Exits TanK menu and goes back to the top menu. Press enTeR
to go back to the top menu or press inDeX to loop back through
the TanK menu options.
4 mA (FULL)
BLIND ZONE
8 [203.2]
20 mA
(EMPTY)
figure 7: Reverse Output Operation
OUTpUT MenU
Press inDeX to advance to the next menu item. Press enTeR
to retain the value.
Safe MODe
Sets the output of the transducer for fail-safe mode. The trans-
mitter will output the safe mode programmed setting if the trans-
mitter loses the echo signal. Select 22 mA, 21 mA, 20 mA, 4 mA
or HOLD. Factory default value is 22 mA. Unit will resume nor-
mal operation when echo signal is again received.
22 ma Output of 22 mA.
21 ma Output of 21 mA.
20 ma Output of 20 mA.
4 ma Output of 4 mA.
HOLD Output of last known signal is held.
eXiT Exit without making changes.
ReVeRSe Ma
Sets the transmitter output to be forward or reverse acting.
Select NORM or REV. Factory default is NORM with 4 mA set
at the maximum range of the unit and 20 mA set at the end of
the blind zone. See Figure 7 below. NOTE: HEIGHT and FILL H
must be set before reversing the output.
nORM 4 mA is set to be the bottom of the tank (tank empty)
and 20 mA is set to be the height the liquid can go in the tank
(tank full).
ReVeRSe 20 mA is set to be the bottom of the tank (tank
empty) and 4 mA is set to be the height the liquid can go in
the tank (tank full).
eXiT Exit without making changes.
BLIND ZONE
8 [203.2]
20 mA (FULL)
4 mA
(EMPTY)
figure 6: HeiGHT and fiLL HeiGHT
HeLp
Displays a guide to the menu items in this menu. Press enTeR
to display.
eXiT
Exits OUTpUT menu and goes back to the top menu. Press
enTeR to go back to the top menu or press inDeX to loop back
through the OUTpUT menu options.