Omega LTUM1 Series Manuale utente

LTUM1 Series

Tuning Fork Level Switch

Contents

1. Models…………………………………………………………………….……….……4

2. Wiring …………………………………………………………………….….…………5

3. Fork Sensing Spot........................................................................................................ 6

4. Magnetic Test................................................................................................................ 6

5. Output Status ................................................................................................................ 7

6. Installation...……………………………………………………………………………8

7. Simple Troubleshooting............................................................................................. 9

1. Models

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.) 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: No. 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.

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/cm3, 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. User

holds the magnet and moves it close to testing point, the output status will switch

from NO. to NC. or NC to NO. and red LED would switch ON or OFF while fork

continues to vibrate. When magnet is pulled away from the testing point, the

output status and red LED would return as default while fork continues to vibrate.

The purpose of testing is to confirm the wiring and functioning are correct.

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. Red LED indication is on.

High (Max.) Mode: Tuning fork switch will be actuated 3 seconds after the

power is on. Relay is NC and red LED indication is on. When tuning fork is

covered by testing medium, vibration stops and relay becomes numbeR

Red LED indication is on.

Flashing red indicates abnormal: Possible causes overloads or short-circuit

load back, equipment malfunction or wear tuning fork probe.

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. ( Figure 4)

(Figure 3)

(Figure 4)

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.

Check the wiring diagram

and correct it.

The wiring for high/low

level is incorrect.

Check the wiring and repair.

Output Indicator (Red

Light) is flashing.

The tuning fork is worn,

deformed or demaged.

Contact with the local sales

representative.

The tuning fork sensed

the material, but the

switch indicates it does

not exist.

Liquid density sensed

< 0.7g/cm³, the selected

model is not applicable

to use

Contact with the local sales

representative.

The tuning fork does

not sense the material,

but the switch indicates

it exists.

The tuning fork is stuck or

agglomerated by the

material.

Check the tuning fork and

remove the sediment.

Indice

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