LTUM1 Series Tuning Fork Level Switch 1
Contents 1. Models …………………………………………………………………….……….……4 2. Wiring …………………………………………………………………….….…………5 3. Fork Sensing Spot........................................................................................................ 6 4. Magnetic Test ................................................................................................................ 6 5. Output Status ................................................................................................................ 7 6. Installation...
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2. Wiring Power supply is DC. Output is PNP / NPN. Please see Figure 1. PNP wiring: High (Max.) Mode: No. 1 pin (Brown) is connected to L-. No.3 pin (Blue) is connected to L+. Output is connected to No. 2 pin (Black) , then connected to L-. No. 4 pin (Yellow Green) goes to ground. Low (Min.) Mode: number 1 pin (Brown) is connected to L-. No.2 pin (Black) is connected to L+. Output is connected to No. 3 pin (Blue), then connected to L-. No. 4 pin (Yellow Green) goes to ground. PNP wiring: High (Max.
3. Fork Sensing Spot LTUM1 fork sensing spot is shown as Figure 3 below. Considering testing medium is water (S.G.=1 g/cm3) , sensing spot is at the fillister about 23mm from the tip. If testing medium has S.G. lower than 1g/cm 3, sensing spot would be above the fillister. In contrast, sensing spot will be below the fillister. 4. Magnetic Test After the switch is installed and powered, magnetic test function can be performed accordingly. The testing point is marked on the housing label.
5. Output Status LTUM1 is equipped with two wires power supply. Relay output is connected in two wiring power (L+/–) , which offers Min./ Max. modes according to different pin numbers. When powered with 20 to 250、50/60 Hz Vac / Vdc, top of housing would light up with blue LED. Low (Min.) Mode: Tuning fork switch will be actuated 3 seconds after the power is on. Relay is NO and red LED indication is off. When tuning fork is covered by testing medium, vibration stops and relay becomes NC.
6. Installation Horizontal Installation: 1. Can be applied in viscosity, powder and, liquid. Do not inst.( Figure 1) 2. When installing the product, The position hole plug must be upward direction. If not, incorrect installation could be damage the product.( Figure 2) (Figure 1) (Figure 2) Vertical Installation: 1. Opening of the two fork blades is to be as the flow direction. ( Figure 3) 2. Do not install near substance inlet.
7. Simple Troubleshooting Error Cause Solution Power Supply indicator (Green Light) is off and the switch is not conductive. No power supply. Power on or check the wiring and repair. Power doesn't meet the specification. Check the nameplate and power 12 to 55 Vdc The signal lamp is normal and the switch output is incorrect. The control circuit wiring is incorrect. The wiring for high/low level is incorrect. Check the wiring diagram and correct it. Output Indicator (Red Light) is flashing.
M5733/0119
