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Cyl-Tec, Inc.

971 W. Industrial Dr.

Aurora, IL 60506

Local & Outside U.S:

 630-844-8800

U.S. Toll Free:

 888-429-5832

Fax:

 630-844-5100

info@cyl-tec.com

www.cyl-tec.com

#2: HIGH CALIBRATION

1.  Fill the tank to its full capacity.
2.  Wait 5-10 minutes to allow the liquid in the tank to settle.
3.  Enter Calibration Mode again on Level-Eye

®

:

a.  Press the “L” and “R” buttons together for 5 seconds 

until the word “CAL” is displayed on the LCD, then 

release.

4.  Perform High Calibration:

a.  As “CAL” is still displayed, hold down the “R” button 

for 5 seconds until “Hi” is displayed, then release.

b.  Wait for the word “CHi” to display on the LCD screen, 

confirming the high calibration is complete.

5.  Level-Eye

®

 should now display “100%.” Congratulations!  

You have a happy tank.

NOTE: If Level-Eye is ever reinstalled and used on another tank, 

or with a different liquefied gas, it MUST be re-calibrated to that tank and/

or that specific gas to operate correctly.

#1: LOW CALIBRATION

1.  Add 5 lb. (2.25 kg) of liquid to the empty tank.
2.  Wait 5-10 minutes to allow the wand to chill.
3.  Enter Calibration Mode on Level-Eye

®

:

a.  Hold the “L” and “R” buttons 

together for 5 seconds until the 

word “CAL” is displayed on the 

LCD, then release.

4.  Perform Low Calibration:

a.  As “CAL” is still displayed, 

hold down the “L” button for 5 

seconds until “Lo” is displayed, 

then release.

b.  Wait for the word “CLo” to 

display on the LCD screen, 

confirming the low calibration is 

complete.

LEVEL-EYE

®

 USER MANUAL

© 2020-09  Cyl-Tec, Inc. All rights reserved.

Level-Eye

®

 Troubleshooting

Problem

Cause

Action

LCD does not display 

anything

Replace the battery

1. Remove back cover of Level-Eye to access battery.

2. Replace old battery with new one.

3. Replace back cover. Hand-tighten firmly to fully engage waterproof seal.

LCD only displays 

“000%” or “100%”

Incorrect calibration A new calibration sequence (both low and high) needs to be performed.

LCD continues to display 

“100%” after use

Vessel may have been 

overfilled

Level-Eye will not read below 100% until the liquid level dips below the 

calibration point. Monitor gauge regularly according to usage for any change.

LCD displays an “L” next 

to a number

Normal reading

“L” means “Level” and the number indicates what percentage of liquid gas is 

left in the tank.

“No Symbol”  

 is 

displaying

Head is not properly 

communicating with 

the wand

NOTE: DO NOT perform a calibration while the No Symbol is present!

Check the brass jack connectivity between the head and the wand:
1. Loosen the wing nut at base of head and remove from wand.

2. Check brass connection jacks on both parts for debris or damage.

3. If connection is clear, wait 30 seconds and re-attach the head to the wand.

4. If “No Symbol” is still present, please contact Cyl-Tec customer service.

LCD is displaying 

inaccurate readings

Water damage or 

moisture

Check for water damage or moisture in the LCD screen or Level-Eye housing. 

If damage is severe, contact Cyl-Tec customer service - (888) 429-5832.

Level-Eye

®

 Calibration

Level-Eye

®

 calibration is a two-step process of setting the liquid level range from an empty 

(low) level to a full (high) level for your specific tank size and model.

IMPORTANT! Calibration must be performed DURING the filling process to calibrate correctly.

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