CHAPTER 1 - OVERVIEW ongratulations on purchasing the Garnet Instruments Model 900 S L II ™ Fluid Monitor for Tanks. The S L II ™ represents the latest in state of the art liquid monitoring equipment for stationary tank applications. The S L II ™...
CHAPTER 2 - SYSTEM DESCRIPTION he SeeLeveL II consists of a sender bar, a donut shaped float, a fiber optic interconnect cable, and a display. The sender bar is mounted vertically in the tank with the float sliding up and down around it in accordance with the fluid level.
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IMPORTANT NOTICE: SENDER BAR LIMITS OF RESISTIVITY The temperature of the product in the tank should be limited to approximately +90°C (+194°F). Damage to the float and sender bar can occur if this value is exceeded. The float and tube used in the manufacturing of the sender bar is polyethylene.
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so up to 9,999 can be shown, with the decimal able to be as 9.999, 99.99, 999.9, or 9999 with no decimal. The volume is programmed using the keypad, and a chart showing inches of level versus barrels of volume for the tank is required. If the tank has straight vertical sides so that the volume per inch of depth is constant throughout the tank, then the volume per inch can be entered and the display will calculate all of the inch versus volume table.
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Display Batteries: A set of four alkaline ‘AA’ cells in the display enclosure powers all gauge display functions except for the 4-20 mA or 1-5V outputs. This allows for total stand alone operation of the gauge. This battery pack should last from 3 to 4 years, depending on usage of the LCD backlight.
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the load resistor, which would be read by the remote equipment. Do not apply more than 30 volts across the outputs, and at least 7 volts must be maintained across them to work properly. Unlike the digital display, the 4-20 mA signal is analog, so there may be some degradation in accuracy with it.
CHAPTER 3 - KEYPAD OPERATING INSTRUCTIONS he keypad consists of the 16 buttons on the front of the display, and is used for the following functions: 1. To show inches, alarm status, and battery condition as described in the previous chapter. 2.
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code over the phone so he can turn the gauge on, which saves the tank owner the trouble of having to travel out to the tank to turn on the gauge. The initial code out the door is 1234; this can be changed with the master code. 2.
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To access the Short User Code (SUC) menu (display on/off & °F/°C selection): 1. Press and hold ENTER until “SECU COdE” appears (this will take approximately 5 seconds). 2. Enter the 4 digit short user security code (it will be shown as you enter it) and press ENTER.
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3. ALARM SET MENU: If the code is correct then the alarm set menu will be accessed, the display will show “A1HC” or “A1HO” followed by some volume amount. For interface displays, A1 and A2 are driven by the total volume, and A3 and A4 are driven by the interface volume.
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value in barrels for 20mA output); the existing value will disappear and the new value will be shown. The decimal point location must match the decimal point for the calibration, for example, if the calibration is entered with 2 numbers after the decimal point, then the 4-20 full scale value must also have 2 numbers after the decimal point as well.
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code menu will be accessed, the display will show “USEr CodE XXXX XX”, which is the existing user code. 4. Press the number buttons to enter the new six digit code, the existing code will disappear from the appropriate display and the new value will be shown.
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10. Press ENTER to store the new offset value, “Stor” will be shown momentarily. 11. LINEAR CALIBRATION MENU: For a tank with straight vertical sides, the volume per inch of depth is constant throughout the tank. In this case, it is not necessary to enter a complete calibration table;...
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the previous step, including the leading zeros. The numbers will appear on the top displays as you enter them. 16. As soon as the eighth digit is entered, the display will show “Stor” on the bottom display and the gauge will calculate the calibration for the entire tank.
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normal operation, or if 004 is entered it will be shown as 4 during normal operation. 22. When the table has been entered, scroll through the table values to verify the values. 23. If it is confusing to see existing volume calibration values during table entry, you can erase the entire table by entering all zeros in the linear calibration menu.
CHAPTER 5 - TROUBLESHOOTING GUIDE here are only 5 serviceable components in the monitor: the float, the sender bar, the interconnecting fibre optic cable, the display, and the batteries. If the float is sunk, the display will read the bottom tank reading all the time. If the float is partially sunk, the reading may rise and then fall as the tank is filled.
CHAPTER 6 - MASTER CODE The Master code is available upon request. Note: This code should not be revealed to anyone who does not need to know. Page 20 900D4S Manual...
Alberta, T8A 4G7. Returned warranted items will be repaired or replaced at the discretion of Garnet Instruments. Any Garnet items under the Garnet Warranty Policy that are deemed irreparable by Garnet Instruments will be replaced at no charge or a credit will be issued for that item subject to the customer’s request.