User Manual
Contents
1. ad 3 4 R Power gt Note see track TEST See the graphic of terminal contacting 3 4 lead is power 12Vdc 3 is positive 4 is negative 1 2 lead is signal output 4 20mA Note if the 3 is negative the transmitter cannot normal working 5 5 2 Cable Connect 3 wire no LCD display a Red Loop 5 ZS N Yellow Output signal Black Loop N NS 91H BI YELLOW RED NPT2 L Jy WIRING COLORS SIGNAL a Red color Power Positive l Black color Power Negative Yellow color Output Signal _ 12 6 0 Troubleshooting 6 1 Symptom Chart Symptom Troubleshooting Tip No Signal Received at controller e Check wiring connection to Power e Check that power Pole is correct red wire connect power positive and Black wire connect power negative Output is Under 4mA no variable with the float moving water Level changing e Be sure float retention clip is in place at base of probe e Be sure float is in place and not stuck e Check signal wire in probe that is connect with Negative Output current over 39mA no variable with the float moving water Level changing e Check float for free movement along probe e Be sure probe is mounted perpendicular with gravity e Check signal wire in probe that is break or the negative wire is break The output current is not changing as 16mA when water level is2. the larger the float is the easier it is to provide a high accuracy measurement 5 4 Stainless Steel Probe Mounting 5 4 1 Sizing of Stainless Steel Probe Insertion Length is Actual length from mounting point to bottom of tank Overall length of probe is Insertion Length plus 2 inches 51mm for Flange mounted probe and Insertion Length plus 3 inches 76mm for Compression Fitting mounted probe The testing range is not the same as the length of probe The amount of testing Range in a tank will vary depending on the mounting style Stainless Steel probes are available in lengths up to 12 feet 3 77m Due to difficulty with shipping and installation on site it is recommend 2 to 5 feet 0 6 to 1 5m as maximum length for this style probe if practical Most of the SS Probes are mounted with probe end resting on bottom of the tank for non pressurized tanks or about 1 2 12 7mm from bottom for pressurized tanks and held in position with compression fitting at top of tank Minimum process connection depends on the diameter of float but it is suggested to use 2 NPT or larger If this compression fitting is used fitting should be positioned below crimp in tube or a minimum of 4 inches 102mm from the top of probe Hand tighten fitting in a non pressurized tank This will allow a slight movement of probe when tank expands or contracts If tank is pressurized fitting must be tightened If a flange is being used a D st
3. damage e Mount the probe perpendicular to gravity e Float should have free movement along probe Float dimensions are dia 52 dia 52 e Float Retention Clip should be in place at base of probe Junction Box P27 Wire Junction Box Wire A gt i H KX fe 9 LOJ j VS Pi N WY NPT2 Low o 227 Optional Flange i alle rear a T T I lt Za amp Tube e Tube lt E g sg 1 J j m Jo a LX LL Flat TI i Float L 12 L 12 oO 52 z 232 u Bottom of vessel i Bottom of vessel Blind Range A 50 B 30 Blind Range A 30 B 30 5 3 Mounting Considerations Mounting considerations may vary Flanges Compression Fitting etc depending on the application For underground tanks the probe is generally mounted in the riser resting on the bottom of the tank Spacers are used to hold the sensor in the riser and a cable is suspended from the tank cap While most underground tanks are horizontal and fairly standard in design over ground tanks vary considerably The requirements for mounting these probes are fairly simple Since the sensor requires a float to provide level position there is a minimum size required for insertion of the float into the tank It is recommended that a minimum of 2 diameter be used for the most reliable system The size and material of the float being used will have a slight impact on the overall accuracy of the measuring system In general
4. rising to middle point Check the output resistance whether that is less 350 Ohm Output appears to be going down yet tank is filling e Check configuration of 4mA amp 20mA points Output appears to be going up yet tank is emptying 6 2 Internal Diagnostics 6 2 1 During Normal Operation e Check configuration of 4mA amp 20mA points Power pole is opposite Wire Break or float outside active range output is Indicated nothing 6 2 2 Lost Float Diagnostic When Float gets stuck beyond active ranges or end cap falls off and float slips away from probe then outputs will indicate as shown no variable with the float moving water Level changing 6 3 Manual test Place float magnet near top of probe or place the float magnet near the bottom of probe the output indicate from 4mA to 20 Ma 6 4 Factory Assistance Manual book can answer any questions about The LT Series Level Transmitter If you require assistance and attempts to locate the problem have failed Contact your local representative or our company Please provide the following information e Instrument Model Number e Sensing Element Model Number and Length e Original Purchase Order Number e Material being measured e Temperature e Pressure e Agitation e Brief description of the problem e Checkout procedures that have failed 7 Order information Specify the following when ordering Model suffix numbering the instruments is shipped with the set
5. 4 20mA 3 Accuracy 15mm 4 Input resistance Less 350 Ohm 5 Length of lead wire 1000 500mm 6 Working temperature range 30 125 C 7 Working pressure max 2 0 Mpa SUS304 8 Special Gravity of liquid 0 65g cm 9 Protective Class IP65 10 Display LCD display selected 11 Mounting threads 2 NPT or Flange 12 Approval CE 4 Dimension 4 1 Aluminium housing With LCD display 110 IX S 4 S S 8 p 560 a i 7 amp A N a SS K i o it 16 i N X 7 x L 61 A N o i f gt 4 2 Aluminium housing no LCD display E T5 a _ 560 2 y amp i u N NI i ite Q t Q it 5 Mounting Note Be sure to read and understand all of the Installation Instruction before beginning the procedure 5 1 Unpacking Carefully remove the contents of the shipping carton and check each item against the packing list before destroying any packing materials If there is any shortage or damage report to the factory at postmaster yuanben cn 5 2 Mounting Conditions e When installing probes you do not bend rigid probes otherwise permanent damage may result Longer probes need to be supported at both ends while being handled Probes are sealed at the factory and have electronic switches inside Do not attempt to open the probe or weld the tube LT series level system is designed for industrial applications but should be mounted in a position as free as possible from vibration corrosive atmospheres or any possibility of mechanical
6. LT Series Level Transmitter User Manual Shanghai Yuanben Tech Co Ltd No 6133 Huyi Rd Jiading district Shanghai City China 201806 Tel 086 21 69168301 Fax 086 21 69168673 fin Ar Email postmaster yuanben cn r Http www yuanben cn LT Series Level Transmitter User s Manual 1 Description Shanghai Yuanben has developed a stainless steel version Level Transmitter its continuous output signal is O 5Vdc or 4 20mA and the sensor combines the proven reliability of magnetic reed switching with resistors net worked to provide a variable output proportional to the float position The transmitter features two wire current or voltage output four wire for low level alarm option and can be fitted externally 2 NPT connection or an flange The operating temperature range is from 30 C to 125 C The working pressure is from 1 5 to 2 0 Mpa The LCD display can be selected 2 Model and Simplex LT Level Transmitter Model Simplex Feature LT H H level Transmitter 500 Stem length 500mm 1000 Stem length 1000mm I LCD Display I No LCD display A 0 5 Vdc Output B 4 20mA Output 300 Cable length M8 Connector M8 or M12 Pl Float Material PP Pl PA P2 PVDF P3 S1 SUS304 S1 SUS316L S2 N NBR 3 Specification No Characteristic Parameter Note 1 Working voltage 12Vdc 2 Output signal
7. tings so It is necessary such as measuring range of probe the length and dia of probe 7 1 float ball type for special gravity of liquid Specify the number of wire as well Example pressure of system temperature system 7 2 Calibration range and unit Calibration range can be specified within the measurement range
8. yle connector can be specified to thread probe directly into flange This requires more accuracy in specifying overall length of probe but eliminates need for compression fitting or adapter bushing Contact factory if Welded Flange connection is required But we wish you not to select the flange it is too expensive to delivery 5 4 2 Assembly of Stainless Steel Probe 1 Standard SS Float Kit should contain 2 inch 316 stainless steel float and retainer to hold float onto probe There is an E Clip 2 Two people are recommended for assembly of probe one to hold the probe and the other to assemble components 3 Slide compression fitting if it is being used on probe 4 Slide reducing bushing or flange on to probe 5 Slide float onto probe Magnet is located in the middle of the float so orientation of float does not make any difference 5 4 3 Insertion of Stainless Steel Probe Do not allow float to drop suddenly since it can damage retainer at end of probe 1 Insert bottom end of probe into tank 2 Thread bushing into tank or flange Bolt flange into position 3 Thread compression fitting into bushing or flange 4 Hand tight to insure compression fitting is sealed turn fitting 2 turns after hand tightening 5 Make final check to see that all of bolts and screws are in proper position and probe is securely tightened 5 5 Electric circuit linking 5 5 1 Electric terminal connect with LCD display w Signal N 1 2 N
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