Gems Sensors & Controls UCL-520 Owner'S Manual Download Page 5

B. Entering the Program Mode: 

Press

 and hold the 

SELECT/FAST button for approximately 5 seconds until the display 
changes from a numeric value to PROG, indicating that you have 
entered the PROG mode.  

Note:  When PROG mode is active, the UCL-520 will hold the 
last current value.  The value will not change until the transmit-
ter is returned to RUN Mode.

Step Six

MENU ITEMS

N. FULL:

 Target calibration technique that allows the user to enter 

the present distance from the transducer face to the liquid or a reflec-

tive target as the 20 mA (FULL) set point

O. EMPTY:

 Target calibration technique that allows the user to 

enter the present distance from the transducer face to the liquid or a 

reflective target as the 4 mA (EMPTY) set point. 

P. WAIT:

 Indicates that you have selected either FULL or EMPTY 

and the transmitter is calculating the distance value.

Q. VALUES:

  Allow the user to view the present calibration settings 

that are programmed in the transmitter.

R. SETUP:

 Displays the present calibration settings such as UNITS, 

MinR, MaxR, and SAFE. 

S. MINR:

 The lesser distance from the transducer to the full tank 

height of liquid. 

T. MAXR: 

The greater distance from the transducer to the empty tank 

height of liquid.

U. RESET:

 Allows the user to reset the transmitter to its original 

factory default settings.

V. DIAG (Diagnostics):

 Allows the user to view the present val-

ues of LEVEL, TEMP, ECHO, POWER, MOUNT and VER.

W. LEVEL

:

 Displays the current Inch, Centimeter or Percent mea-

sured value.

X. TEMP:

 Displays the temperature in the vessel at the transducer.

Y. ECHO:

 Displays the present acoustic signal strength.

Z. POWER:

 Displays the present acoustic power level

AA. MOUNT:

 Displays either QUIET (no fitting noise) or NOISY 

(potential fitting noise), If NOISY with transmitter performance 

issues, please contact Gems to discuss your installation.

BB. VER (VERSION):

 Displays the transmitter software version.

CC. DONE:

 Indicates that the new value has been saved in memo-

ry (after depressing the SELECT/FAST key).

DD. ERROR:

  Indicates that the new value has NOT been saved in 

memory (after depressing the SELECT/FAST or EXIT key).

EE. RUN:

 When displayed, if the user depresses the SELECT/FAST 

key, the transmitter will exit the programming mode and return to the 

RUN mode for normal operation.

FF. UP / DOWN:

 Increases or decreases the SET 20 and SET 4 

display values in the programming mode. NOTE: Simultaneously 

holding down the SELECT/FAST button while pressing the UP or 

DOWN button will increase the speed of the display.

Step Seven

PROGRAMMING

A. Introduction:

  The transmitter has two modes, RUN and 

PROGRAM. In the RUN mode, the transmitter is operational and the 
display will indicate the liquid height in inches, centimeters or per-
cent. 

In the PROGRAM mode, the display will indicate the selected mode 
of calibration. The transmitter arrives from the factory with its set-
tings at 4 mA = maximum range and 20 mA = minimum range 
(defined by the dead band or minimum measurement distance). The 
transmitter is programmed with it’s built-in display and three button 
keyboard. 

Under normal application circumstances, users typi-

cally program the HEIGHT distance value, FILL H distance 
value and FAIL-SAFE mode. 

+

UP

DOWN

SELECT

FAST

UCL-520

--

+

UP

DOWN

SELECT

FAST

UCL-520

--

Hold for 

5 Seconds

Top Menu

After entering the PROG mode, the display will scroll through the top 
menu, alternately flashing UNITS, TANK, SAFE, TG CAL, VALUES, 
HELP and RUN.

Summary of Contents for UCL-520

Page 1: ...d include original packing slip C O D returns are not accepted Gems reserves the right to apply restocking charges Gems further reserves the right to unilaterally waive this warranty and to dispose of...

Page 2: ...ut 4 20 mA two wire Signal invert 4 20 mA 20 4 mA Calibration Push button Fail safety Selectable 4 mA 20 mA 21 mA 22 mA or hold last value Process temp F 4 to 140 C 20 to 60 Temp comp Automatic Electr...

Page 3: ...iring and Electrical A supply voltage loop power of 12 28 VDC is used to power the UCL 520 transmitter The sensor circuit should never exceed a maximum of 28 volts DC Electrical wiring of the sensor s...

Page 4: ...ort period of time this message will disappear and be replaced by a numeric value B FULL Level has reached the programmed FULL set point C EMPTY Level has reached the programmed EMPTY set point D UNIT...

Page 5: ...POWER Displays the present acoustic power level AA MOUNT Displays either QUIET no fitting noise or NOISY potential fitting noise If NOISY with transmitter performance issues please contact Gems to di...

Page 6: ...MinR E Change Display Mode To change the display to indicate the height of liquid follow the instructions below 1 Press the SELECT FAST button and hold it for 5 seconds until PROG appears 2 When UNITS...

Page 7: ...LECT FAST button The dis play will rotate between HEIGHT FILL H and REV mA 3 When HEIGHT appears press the SELECT FAST button The display will show a decimal reading in the selected UNITS 4 Press the...

Page 8: ...ique that allows the user to enter the present distance from the transducer face to the liquid or a reflective target as the 20 mA FULL set point EMPTY Target calibration technique that allows the use...

Page 9: ...in a 2 5 cm riser 3 Stand Pipe A stand pipe may be used to dampen turbulence or separate surface foam Select a minimum 3 pipe for the stand pipe The pipe length should run the measure ment span Cut a...

Page 10: ...FAST SELECT FAST SELECT FAST TROUBLESHOOTING Transmitter UCL 520 4 mA Setting 26 2 8m 20 mA Setting 8 20 cm Factory Set Points Power Supply Power Supply 20 mA 4 mA mA 4 5 6 mA 19 20 21 Red Black Red...

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