Kobold SMO Series User manual

Operating Instruction

for

Flow Meter / Monitor

Model: SMO-...

SMW-...

SMO/SMW

Page 2 SMO/SMW K13/0322

1. Contents

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

2.Note .............................................................................................................. 3

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

4.Regulation Use ............................................................................................. 4

5.Operating Principle ........................................................................................ 4

6.Mechanical Connection ................................................................................. 5

7.Electrical Connection .................................................................................... 6

7.1.with Plug Connection (not for SMO-2..and SMW-2) ............................ 6

7.2.Examples for Contact Protection Measures ......................................... 6

8.Commissioning.............................................................................................. 7

9.Maintenance ................................................................................................. 8

10.Technical Information .................................................................................... 9

11.Order Codes ............................................................................................... 10

12.Dimensions ................................................................................................. 12

13.Recommended Parts .................................................................................. 13

14.EU Declaration of Conformance (SMO/SMW) ............................................ 14

15.UK Declaration of Conformity (SMO/SMW) ................................................ 15

Manufactured and sold by:

Kobold Messring GmbH

Nordring 22-24

D-65719 Hofheim

Tel.: +49(0)6192-2990

Fax: +49(0)6192-23398

E-Mail: [email protected]

Internet: www.kobold.com

SMO/SMW

SMO/SMW K13/0322 Page 3

2. Note

Please read these operating instructions before unpacking and putting the unit

into operation. Follow the instructions precisely as described herein.

The instruction manuals on our website www.kobold.com are always for currently

manufactured version of our products. Due to technical changes, the instruction

manuals available online may not always correspond to the product version you

have purchased. If you need an instruction manual that corresponds to the

purchased product version, you can request it from us free of charge by email

([email protected]) in PDF format, specifying the relevant invoice number and

serial number. If you wish, the operating instructions can also be sent to you by

post in paper form against an applicable postage fee.

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 EC-machine guidelines.

PED 2014/68/EU

In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the PED

2014/68/EU no CE mark.

Table 8, Pipe, Group 1 dangerous fluids

3. Instrument Inspection

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:

 Flow Meter / Monitor, model SMW-, SMO-

SMO/SMW

Page 4 SMO/SMW K13/0322

4. Regulation Use

Any use of the Flow Meter / Monitor, which exceeds the manufacturer’s

specifications, may invalidate its warranty. Therefore, any resulting damage is not

the responsibility of the manufacturer. The user assumes all risk for such usage.

The Flow Meter / Monitor, model: SMW/SMO, is used for measuring and

monitoring liquid flow. Only clean, low viscosity and homogeneous media may be

measured, which do not affect the materials used in the instrument casing. Large

measuring errors will occur when using high viscosity media. Large dirt particles

may lead to blocking of the float and therefore large measurement and signal

errors. Ferritic particles that deposit on the float body (with internal magnet) may

also lead to a similar effect. Therefore, we recommend a magnet filter.

The instruments are provided as follows:

Flow measurement

The actual flow may be read locally off the instrument indication, which is

mounted at the side of the housing. The scale shows the flow rate directly in litres

per minute of water.

Limit Value Contacts (not for model SMW-2.. and SMO-2..)

For the monitoring of the flow rate, the instruments may be fitted with one or two

adjustable limit value contacts (reed contacts).

Contact versions:

 N/O contact (standard)

 Changeover contact (standard)

 N/O (cCSAus)

 Changeover (cCSAus)

The contact is adjustable over the entire measuring range. Hysteresis should

however be taken into account.

5. Operating Principle

The Flow Meters / Monitors, model: SMW,

SMO, are based on the principle of the well-

known float type Flow Meters, however

without making use of conventional

measuring pipe that extends conically

upwards. These patented instruments are

provided instead with a cylindrical guide-tube

with conical slots along the periphery. A float

is found in this tube which, by means of the

flow of the medium, is raised in the tube

SMO/SMW

SMO/SMW K13/0322 Page 5

against a force of a spring. Each float position corresponds to a certain flow which

can be read off by means of an indicator, external to the medium.

Permanent magnets are inserted in the float which activates reed switches

mounted outside of the flow throughput. The activation of the contact is carried

out by means of magnetic field, i.e. the contact is hermetically separated from the

flowing medium.

6. Mechanical Connection

Before installation:

 Please ascertain that the allowable maximum

operating pressure and operating temperature of the

instruments are not exceeded

 The instrument should be installed in a vertical (model

SMO-...) or horizontal (model SMW-...) position in the

piping. The flow direction is according to the arrow

direction - from top to bottom (model SMO-...), or left to

right / right to left (model SMW-...).

 Remove all transport locks and ascertain that no

packing material is left within the instrument.

 Sealing of the connection threads should be carried out

with Teflon tape or similar.

 Do not install the instrument within an induction field.

 If possible, check whether the connection joints/pipe

link is fully sealed, immediately after mechanical

installation (see 8. Commissioning).

SMO/SMW

Page 6 SMO/SMW K13/0322

7. Electrical Connection

7.1. with Plug Connection (not for SMO-2..and SMW-2)

 Ensure that the power is disconnected while

connections are made.

 Loosen the holding screw on the plug cap and

remove the cap from the plug.

 Connect the power cable to the plug cap in

accordance with the connection diagram below.

 If the contact has as yet not been adjusted, this

should be carried out at this stage

(see 8. Commissioning).

 Push the plug over contact foot and secure it with

the holding screw.

Attention! The given electrical values of the reed contacts shall not be

exceeded even for short periods of time. For higher switching values, we

recommend contact protection relays or other contact protection

measures.

 After connection of the required external equipment to the limit contacts and

adjustment of the desired switching points, all the connection work is finished.

 The unit may now be set in operation.

7.2. Examples for Contact Protection Measures

For capacitive and inductive loads (long wires and relays/switch) we recommend

the following protective circuit:

SMO/SMW

SMO/SMW K13/0322 Page 7

8. Commissioning

With reference to employment of these instruments in machines, according to the

guidelines 89/392/EWG, commissioning is prohibited unless it is established that

the machine complies with the respective guidelines.

Adjustment of limit values

(Model SMO-3... and SMW-3... with display and contact)

 Loosen both the safety screws on contact-foot with the help

of a screw driver.

 Push the switch-housing downwards.

 Remove the plug-cap from contact-foot, after loosening the

safety screws.

 Connect on pin 1 + 2 (changeover contact PIN 2 + 3) a

suitable conductivity testing device.

Attention! Sudden opening of inflow can lead to

pressure peaks, which overstep the operational

pressure many times. Water hammer! This can

cause the breakage of measuring glass.

Case 1: with installed unit

Open the inlet pipe. Let the medium flow through it slowly, till

the pointer display shows the flow volume of desired switching

point.

Case 2: with not installed unit

Lift up the float with a suitable tool, till the pointer display shows flow volume of

desired switching point.

 The reed contact is now closed (electrical conductivity).

 Push the switch-housing upwards, till the reed contact just opens (No electrical

conduction). The contact is now set for falling flow. If the contact is to be

adjusted for the rising flow, the contact must be repositioned based on

hysteresis, i.e. 3-5 mm downwards.

 In this position tighten the safety screws. Replace the plug cap. The unit is now

ready for operation.

 With correct adjustment of limit-switch, bistable operation is achieved, that

means on surpassing the adjusted limit value the contact closes, and when

falling below the adjusted limit value, the contact open.

SMO/SMW

Page 8 SMO/SMW K13/0322

Adjustment of limit value (model SMO-1..., SMW-1...)

 Loosen the safety screws on contact-foot.

 Set the adjustment notch on contact-foot at the desired value on the scale

mounted on the housing.

 In this position, tighten the safety screws.

Hysteresis

Hysteresis indicates the difference between switch-on and switch-off points of

contacts. Through factory set coordination of magnet and contact force (AW-

number) a float upstroke (hysteresis) of approx. 3-5 mm is achieved. At the same

time, it is ensured that the contact operates in a bistable manner.

Measuring range transgressions

Attention! Pulsating flow currents should be avoided. Overstepping

of measuring range continuously by pulsating flow currents and

subsequently resulting impacts on float‘s limit pin may lead to

increased wear and tear as well as damage to the unit. In such

cases, please consult your supplier.

With continuous flow, if the measuring range is substantially over-ranged, an

increase in pressure loss is noticed.

(Permissible max. operational pressure must not be exceeded)

9. Maintenance

For measured media without contamination, the instrument is almost

maintenance-free. Where contamination or calcium or other deposits are found

on the internal parts, the instrument should be cleaned regularly.

The instrument may be dismantled from the piping with the help of a suitable

spanner. The internal parts are accessible for cleaning after removing the upper

connection joint.

The internal parts may be cleaned with a suitable brush. After cleaning, the

instrument should be reassembled in the correct order.

We recommend changing the O-rings of the connection joints after cleaning.

Attention! Make sure before beginning the maintenance that the

supply wires are de-energized.

SMO/SMW

SMO/SMW K13/0322 Page 9

10. Technical Information

Housing/Connections/Float: SMx-x1..:Brass, Ms 58

SMx-x2..:St. Steel,1.4301

Slotted nozzle: SMx-x1..:Brass, Ms 58

SMx-x1..:St. Steel, 1.3955

Sealings: SMx-x1..:NBR

SMx-x2..:FPM

Max. temperature: 100 °C

Max. operating pressure: SMx-x1..:250 bar

SMx-x2..:350 bar

Mounting position SMW: horizontal

SMO: vertical, flow from top

Accuracy: ± 5 % of f.s.

Reproducibility 1 %

Contacts: for SMW-1..., SMW-3..., SMO-1 and SMO-3...

Electrical connection: Plug DIN EN 175301-803

Electrical switching specifications:

N/O contact (standard) max. 250 VAC/DC / 1,5 A / 100 W / 100 VA

Changeover contact (standard) max. 250 VAC/DC / 1A / 30 W / 60 VA

N/O contact and

changeover contact (cCSAus) 230 VDC / 0,26 A / 60 W,

60 VDC / 1 A / 60 W,

max. 240 VAC / 0,42 A / 100 W,

100 VAC / 1 A / 100 W

Protection: IP 65 (electrical contact)

IP 54 (side indication)

Average electrical switch contact life (MTTF):

At max. electrical load 105 switching cycles

At half electrical load (<10% max. load) 5*107 switching cycles

At low electrical load (<10V/<1mA) 108 switching cycles

SMO/SMW

Page 10 SMO/SMW K13/0322

11. Order Codes

Flow switches with 1 contact, flow from top model: SMO-1…

(Example: SMO-1101H R0 R08)

Measuring

range l/min.

water

Pressure

loss

Δ P (bar)

Brass Stainless steel Contact Connection

0.2...3 0.2 SMO-1101H... SMO-1201H.. …R0…= 1 N/O contact

…U0…= 1 Changeover contact

…C0…= 1 N/O contact (cCSAus)

…D0… = 1 Changeover contact

(cCSAus)

…RR…= 2 N/O contact

…UU…= 2 Changeover contact

…CC…= 2 N/O contact (cCSAus)

…DD…= 2 changeover contact

(cCSAus)

..R08 = G 1/4

..R15 = G 1/2

..N08 = 1/4 NPT

..N15 = 1/2 NPT

1…4.5 0.2 SMO-1103H... SMO-1203H...

1…7.5 0.3 SMO-1105H... SMO-1205H...

1…14 0.4 SMO-1107H... SMO-1207H...

2…18 0.2 SMO-1109H... SMO-1209H...

7…25 0.4 SMO-1111H... SMO-1211H...

10…60 0.7 SMO-1113H... SMO-1213H... ..R15 = G 1/2 ..N15 = 1/2 NPT

10…80 0.5 SMO-1115H... SMO-1215H... ..R20 = G 3/4

..R25 = G 1 ..N20 = 3/4 NPT

10…120 0.5 SMO-1117H... SMO-1217H...

Flow meter, flow from top model: SMO-2…

(Example: SMO-2107H 00R08)

Measuring

range l/min.

water

Pressure

Loss

Δ P (bar)

Brass Stainless steel Contact Connection

0.2...3 0.2 SMO-2101H... SMO-2201H..

...00… = without contact

..R08 = G 1/4

..R15 = G 1/2

..N08 = 1/4 NPT

..N15 = 1/2 NPT

1…4.5 0.2 SMO-2103H... SMO-2203H...

1…7.5 0.3 SMO-2105H... SMO-2205H...

1…14 0.4 SMO-2107H... SMO-2207H...

2…18 0.2 SMO-2109H... SMO-2209H...

7…25 0.4 SMO-2111H... SMO-2211H...

10…60 0.7 SMO-2113H... SMO-2213H... ..R15 = G 1/2 ..N15 = 1/2 NPT

10…80 0.5 SMO-2115H... SMO-2215H... ..R20 = G 3/4

..R25 = G 1

..N20 = 3/4 NPT

..N25 = 1 NPT

10…120 0.5 SMO-2117H... SMO-2217H...

Flow meters and switches with 1 contact, flow from top model: SMO-3…

(Example: SMO-3101H R0 R08)

Measuring

range l/min.

water

Pressure

loss

Δ P (bar)

Brass Stainless

Steel

Contact Connection

0.2...3 0.2 SMO-3101H... SMO-3201H.. …R0…= 1 N/O contact

…U0…= 1 Changeover contact

…C0…= 1 N/O contact (cCSAus)

…D0… = 1 Changeover contact

(cCSAus)

…RR…= 2 N/O contact

…UU…= 2 Changeover contact

…CC…= 2 N/O contact (cCSAus)

…DD…= 2 changeover contact

(cCSAus)

..R08 = G 1/4

..R15 = G 1/2

..N08 = 1/4 NPT

..N15 = 1/2 NPT

1…4.5 0.2 SMO-3103H... SMO-3203H...

1…7.5 0.3 SMO-3105H... SMO-3205H...

1…14 0.4 SMO-3107H... SMO-3207H...

2…18 0.2 SMO-3109H... SMO-3209H...

7…25 0.4 SMO-3111H... SMO-3211H...

10…60 0.7 SMO-3113H... SMO-3213H... ..R15 = G 1/2 ..N15 = 1/2 NPT

10…80 0.5 SMO-3115H... SMO-3215H... ..R20 = G 3/4

..R25 = G 1

..N20 = 3/4 NPT

..N25 = 1 NPT

10…120 0.5 SMO-3117H... SMO-3217H...

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