Instruction d'utilisation Omega Engineering LVCN-302

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omega.com
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LVCN-302
Set-Up Manual for Sump Model
MADE IN
User’s
Guide
Specifications:
Sensor Input: Isolated input accepts any type of 4-20 mA process signal. Loop power available up to
24VDC for 2 wire device
Input Power: 120VAC/900 mA; 24VDC unregulated/450 mA
Security Levels: 3 levels of access protect data changes with DIP switch on back
Control Circuits: Four Form C relays, 10.0 amp 125VAC (noninductive)
Switching Mode: Selectable, NO or NC states
Output & Input Connections: Term

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Lower Limit of Display Window Upper Limit of Display Window Sump ON LVCN-302 Features and Overview Let's say your tank is 112 inches deep, and the transducer range of the sensor you’ve chosen is 0-5 psi of water. 5 psi equals 138 inches H2O The pressure transducer is located 11 inches off the bottom of the tank. With 51 inches of water in the tank you are cavitating the pump, and at 108 inches of water you are facing probable flooding. The goal is to maintain the liquid level between 90 and 6

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ON ON ON 1 2 3 4 1 2 3 4 1 2 3 4 Security Levels / Selecting and Accessing Data Operator access to data modifications has three modes of security: View Only, Set Point Changes Allowed and Programming. Each mode is selected from the back of the unit with a DIP switch setting. 1234 1234 Programming Mode 1234 1234 1234 1234 This mode, #1 ON, allows you to 1234 1234 1234 1234 change all eight programmable 1234 1234 1234 1234 settings. It is used for initial s

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ON 1 2 3 4 Initial Set-Up in Eight Easy Steps PROGRAMMING MODE 12345 The initial set-up requires you to change the DIP switch to Programming Mode, #1 12345 12345 1234 ON. After the initial set-up, select the DIP switch settings for View Mode or Set 1234 1234 1234 1234 Point Changes Allowed. (More detail on Page 3.) Holding down the INCREASE or 1234 1234 1234 1234 DECREASE arrow for 3 seconds increases the scrolling speed of the numbers on 1234 1234 the display. 1. - Setting the Tr

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5. - Entering the High Alarm Level Press the SELECT button again - the High Level Alarm Point indicator LED on the graphic face and the top RED line in the bar graph display will flash. P___ P___ P___ P___ P___ appears in the display. Enter the level, using the INCREASE or DECREASE arrow to set the desired level. When this point or level is reached, it will indicate a High Level Alarm has been reached and activate the control circuit/device you have designed into your system. 6. - Entering

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Other Helpful Features of LVCN-302 Interrupted 4-20 mA Signal from Sensor Whenever the 4-20 mA signal from the sensor device is lost because of an open wire or device malfunction, an ERR3 ERR3 ERR3 ERR3 ERR3 message is displayed in the Actual Liquid Level window. Additionally, the entire bar display will flash red and green. Over &/or Under 4-20 mA signal received When the input sensor is sending a 4.0 mA signal, the Actual Liquid Level display will show a \/ character in the first digit of

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