Kobold OPT Series, OPT-..10 Series, OPT-...22 Series, OPT-...22/...N4 Series, OPT-4 Series Operating Instructions Manual

Operating Instructions

for

Optical Level Sensor

Model: OPT

OPT

1. Contents

1. Contents ........................................................................................................ 2

2. Note .............................................................................................................. 2

3. Instrument Inspection .................................................................................... 3

4. Regulation Use .............................................................................................. 3

5. Operating Principle ........................................................................................ 3

6. Mechanical Connection ................................................................................. 4

6.1. Process Connection M14 with Nut (OPT-..10) ..................................... 4

6.2. Process Connection G ½ (OPT-..22) ................................................... 4

7. Electrical Connection .................................................................................... 5

7.1. General Information ............................................................................. 5

7.2. Terminal Connection Diagrams ........................................................... 5

8. Technical Information .................................................................................... 6

9. Order Codes ................................................................................................. 7

10. Dimensions ................................................................................................... 7

11. Declaration of Conformance ......................................................................... 8

Manufactured and sold by:

Kobold Messring GmbH

Nordring 22-24

D-65719 Hofheim, Germany

Tel.: [phone]

Fax: [phone]

E-mail: [e-mail]

Internet: www.kobold.com

2. Note

Please read these operating instructions before unpacking and putting the unit
into operation. Follow the instructions precisely as described herein.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.

When used in machines, the measuring unit should be used only when the
machines fulfil the EWG-machine guidelines.

When using the OEM designs (OPT - 0), the electromagnetic compatibility in the
plant must be demonstrated. The sensors themselves are not subjected to any
testing of this type.

Page 2 OPT K02/0410

OPT

3. Instrument Inspection

All Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.

Scope of delivery:

The standard delivery includes:

• Optical Level Sensor model: OPT

• Operating instructions

4. Regulation Use

Any use of the Optical Level Sensor, model: OPT, which exceeds the
manufacturers specification may invalidate its warranty. Therefore any resulting
damage is not the responsibility of the manufacturer. The user assumes all risk
for such usage.

5. Operating Principle

The optical level sensors of model OPT have been developed for monitoring
transparent liquids. Due to the very small dimensions, very slight switching
hysteresis and high repeatability, the instruments are also suited for service in
small vessels. The optical sensor is situated in a robust housing. It comprises a
plastic hollow hemisphere, in which the infrared diode is fitted as a transmitter
and a semiconductor as a receiver. When the sensor is not wetted by liquid, the
infrared light is reflected fully from the surface of the hemisphere to the receiver.
As soon as the sensor is covered with liquid, the refractive index on the boundary
layer changes and most of the light escapes into the liquid. Less light then
reaches the receiver, which allows switching to take place. The level probe
should not be fitted with the sensor pointing downwards, as errors can occur due
to drops of liquid sticking to it.

OPT K02/0410 Page 3