Kobold VKM Series User manual

Operating Instructions
for
Viscosity Compensated
Flow Meter / Monitor
Model: VKM

VKM
page 2 VKM K11/0118
1.Contents
1.Contents........................................................................................................2
2.Note ..............................................................................................................3
3.Instrument Inspection....................................................................................3
4.Regulation Use..............................................................................................4
5.Use in Hazardous Areas...............................................................................5
5.1.General................................................................................................5
5.2.Contacts and Ex-Contact N/O (code F) ...............................................5
5.3.Potential Equalisation ..........................................................................6
6.Operating Principle........................................................................................6
7.Mechanical Connection.................................................................................7
8.Electrical Connection ....................................................................................7
8.1.Switching Output VKM-1.. and VKM-3.................................................7
8.2.VKM-1... and VKM-3... with Ex-contact (cable connection)..................8
8.3.Example for Contact Protective Measures...........................................9
8.4.ADI-Evaluation Electronics VKM-7.. ....................................................9
8.5.Compact electronic VKM-8..................................................................9
9.Commissioning............................................................................................10
9.1.General..............................................................................................10
9.2.Switching Output VKM-1.. and VKM-3...............................................10
9.3.ADI-Electronic Analyser VKM-7.........................................................11
9.4.Compact electronic VKM-8................................................................11
10.Technical Information..................................................................................12
11.Order Codes ...............................................................................................14
12.Maintenance ...............................................................................................16
13.Dimensions .................................................................................................16
14.Recommended Spare-Parts........................................................................18
15.Declaration of the Manufacturer (VKM).......................................................19
16.Declaration of the Manufacturer (Ex RC...).................................................21
17.EU Declaration of Conformance..................................................................22
18.EC-Type Examination Certificate Magnetic reed switch EEx RC................23
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

VKM
VKM K11/0118 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 devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations apply-
ing 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.
as per PED 2014/68/EU
In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the
PED 2014/68/EU no CE mark.
Diagram 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:
Viscosity Compensated Flow Meter / Monitor model: VKM
Operating Instructions

VKM
page 4 VKM K11/0118
4.Regulation Use
The models VKM are used for measuring and monitoring of viscous liquid flows
(max. 540 mm2/s). They are suitable for measuring clean and homogeneous
fluids which are compatible with on the instrument materials used.
If using higher viscosity media, large deviations will occur to the measured val-
ues.
Large dirt particles may impede the movement of the float and cause false alarm
conditions.
Ferritic particles deposited on the float (with magnet) may lead to the same
effects.
The instruments are provided as follows:
Flow measurement (only for Model VKM-2.. and VKM-3..)
The actual flow rate may be read off the magnetically operated pointer indicator
mounted on the instrument. The scale indicates the flow rate directly in litres per
minute.
Limit Value Switches (only for Model VKM-1.. and VKM-3..)
The instrument is fitted with one or two adjustable limit value switches for the
monitoring of flow throughput values.
Type of contacts:
N/O contact (standard)
Changeover contact (standard)
N/O (cCSAus)
Changeover (cCSAus)
N/O II 2G Ex mb IIC T6 Gb
II 2D Ex mb IIIC T80°C Db IP67
II 2G Ex mb IIC T6 Gb
II 2D Ex mb IIIC T80°C Db IP67

VKM
VKM K11/0118 page 5
5.Use in Hazardous Areas
5.1. General
The Flow Meter and Switch do not have a potential igniting source of its own as a
mechanical operating device; it does not get any identification according to the
guideline 2014/34/EU ("ATEX 100a”).
The attachable contact at the sides, being a component of the whole unit,
requires certificates and/or approvals.
The measurement units can be used as follows:
a) In the Zone 2 (Gas-Ex, Cat. 3G) in explosion group IIA, IIB and IIC
b) In the Zone 22 (Dust-Ex, Category 3D) with non-conductive dusts with a
minimum igniting energy of > 3 mJ
c) In the Zone 1 (Gas-Ex, Cat. 2G) in explosion group IIA, IIB and IIC
d) In the Zone 21 (Dust-Ex, Category 2D) with non-conductive dusts with a
minimum igniting energy of > 3 mJ
The Flow Meter and Switches are filled completely with medium in the normal
operation. Zone 2 or zone 1 conditions may be obtained for a short time.
The ambient temperature limit area is fixed as follows:
Execution Medium
Temperature Ambient Temperature Pmax
NBR-seal -20....+70 °C -20...+60 °C 250 bar
FPM-seal -10...+100 °C -10...+90 °C 350 bar
5.2. Contacts and Ex-Contact N/O (code F)
The VKM-1 and VKM-3 can be used in the Ex-area as follows:
Ex-Contact N/O (code F) according Category 2 G, 2D Group II,
Zone 1 and 21.
Standard-contacts (Code R, U, C or D) according Category 2G and 2D,
Group II, in zone 1 and 21 in connection with a switching amplifier for
protection type Ex II (2)GD [EEx ia] IIC (intrinsically safe)
The VKM-2 (without switching contact) can be used according Category 2G and
2D for the Group II in Zone 1 and 21.
The electrical connection is explained in section 8. Electrical Connection.

VKM
page 6 VKM K11/0118
Read-out edge
Flow Direction
Read-out edge
5.3. Potential Equalisation
The All-metal Flow Meters have to be incorporated in the potential equalisation
system of the plant. This is accomplished through connection tube made of metal.
6. Operating Principle
A hollow float with a sharp-edged orifice is located within a
cylindrical bored metal housing. The flowing medium
raises the float against the spring force. The position of the
float corresponds to a particular flow rate which may be
read from the needle indicator mounted on the instrument.
Permanent magnets are fitted around the float which
operate reed contact switches external to the flowing
medium chamber.
The operation of the contacts is voltage free and works by
means of magnetic force. i.e.: the contact is hermetically
sealed from the flowing medium.

VKM
VKM K11/0118 page 7
7.Mechanical Connection
Before installation:
It should be confirmed that the maximum allowed
operating pressures and operating temperatures of the
equipment are not exceeded.
(see table: standard material combinations).
The instruments may be mounted in any flow direction.
No recalibration is required when changing position.
The flow must always take place in the direction of the
arrow (see label).
Remove all transport packing and ascertain that no
packing material is left in the instrument.
Sealing of the connection threads should be carried
out with Teflon tape or similar.
The instruments must not be installed within an
induction field.
if possible, after the mechanical installation, it should
be checked that the connection thread to pipe is fully
sealed (see section 9 Commissioning).
8.Electrical Connection
8.1. Switching Output VKM-1.. and VKM-3..
Make sure that the supply wires are de-energized.
Loosen the holding screw of the plug and pull out the cap
from the socket.
Make connection inside the plug-cap according to the wiring
diagram.
If the contact switchpoint has not been adjusted yet, it would
be appropriate to do so at this point.
(see section 9 Commissioning).
Push the plug onto the socket, secure by using the locking
screw. (see section 9 Commissioning).

VKM
page 8 VKM K11/0118
BN
BU
Ex-contact N/O
8.2. VKM-1... and VKM-3... with Ex-contact (cable connection)
Special requirements for a safety application
The connection of the magnetic switch has to take place in a housing’s, which
is in accordance with a norm ignition protection cat. acc. to EN 50014, 1.2.
The short-circuit current (Ik) of the supply source may not exceed 5 A.
The switch is suitable for an ambient temperature area of –20..+70 °C.
General
Make sure that the supply wires are de-energized.
Plug in the system according to the connecting diagrams.
If the contact switchpoint has not been adjusted yet, it would be appropriate to
do so at this point. (see section 9 Commissioning).
Attention! The given electrical specifications of reed switches must
never be exceeded, even for a short time. For higher switching
capacities we recommend the use of contact protection relays (e.g.
or model MSR) or any other contact protection device.
After your designated external units are connected to the limit contact and
adjustment of desired switching points is accomplished, then all the work
regarding connections is completed.
The unit can now be set in operation.

VKM
VKM K11/0118 page 9
8.3. Example for Contact Protective Measures
For capacitive and inductive loads (long cables and relay/protection) we
recommend the following protective schemes.
8.4. ADI-Evaluation Electronics VKM-7..
For connection of the power supply and the output signals please check with the
operating instructions of the corresponding ADI electronic.
Information! The measuring input of the ADI is already factory-
set.
8.5. Compact electronic VKM-8...
Compact electronic: (..C30R, ..C30M)

VKM
page 10 VKM K11/0118
Compact electronic: (..C34P, .. C34N)
9.Commissioning
9.1. General
Over-ranging
The flow range may be exceeded by a large margin with a non-pulsating flow.
Only a certain increase in pressure loss is experienced. (The permissible
maximum operating pressure must not be exceeded!).
Viscosity range
The instrument scale is suitable for a viscosity range of 1 - 540 mm2/s. Within this
range there is no need for recalibration.
9.2. Switching Output VKM-1.. and VKM-3..
Hysteresis (VKM-1.. and VKM-3..)
Hysteresis is characterised by the difference between the switching on and
switching off points of the contact. By matching the magnet and reed contact
strength (AW Number) a hysteresis of approx. 3.5 mm of float movement is
achieved. At the same time it may be assured that the contacts have a bistable
switching characteristic.
Adjustment of the limit values (VKM-1..)
Loosen the mounting screws on the contact.
Position the marking on the contact in line with the required
value on the housing scale.
Tighten the mounting screws at this position.

VKM
VKM K11/0118 page 11
Adjustment of the limit values (VKM-3..)
With a screwdriver, loosen both mounting screws at the contact.
Move the switch housing to the lowest position.
After loosening the screws, remove the plug cap from the contact.
Connect a suitable multimeter to PIN 1 & 2
(SPDT: contact PIN 2 & 3); (see page 5).
When the instrument is already installed, open the inlet pipe and slowly allow
the medium to flow until the pointer indicator shows the required minimum flow
throughput. The reed switch is then closed (electrical continuity).
Move the switch housing upwards until the reed switch just opens (no electrical
continuity).
At this position tighten the mounting screws. Replace the plug cap. The
instrument is now ready for operation.
By correct adjustment of the limit switch, a bi-stable switch condition is
achieved, i.e.: even when exceeding the adjusted limit value, the contact
remains closed (PIN 1 + 2 or PIN 2 + 3 for changeover contact option).
9.3. ADI-Electronic Analyser VKM-7..
For adjusting the output parameters (analogue-, switching output) please check
with the operating instruction of the corresponding ADI-electronic. The electronic
of the ADI is already factory-set to the sensor.
9.4. Compact electronic VKM-8...
see Operating instructions supplement
for compact electronics without frequency output.

VKM
page 12 VKM K11/0118
10. Technical Information
Body: VKM-x1...: Brass, nickel-plated
VKM-x2...: Stainless steel 1.4301
Screwed fitting: VKM-x1...: Brass, nickel-plated
VKM-x2...: Stainless steel 1.4301
Float: VKM-x1...: Brass, nickel-plated
VKM-x2...: Stainless steel 1.4301
Orifice: Stainless steel 1. 4310
Spring: Stainless steel 1. 4310
Magnet: Oxide ceramics
Seals: VKM-x1...: NBR
VKM-x2...: FPM
Max. temperature: +100 °C
(Attention! Note restrictions for the Ex-area. See section 5.)
Max. pressure: VKM-x1...: 250 bar
VKM-x2...: 350 bar
Installation position: arbitrary
Basic accuracy: ±4% f. s.
(with a viscosity of 105 mm2/s)
Measuring error due to
change in viscosity: For changes in viscosity within
1–540 mm2/s the additional
deviation is ± 5% f. s. maximum
Viscosity range: 1–540 mm2/s
Contacts: Optional with VKM-1..., VKM-3...
Electrical connection: 2 m cable (VKM-..F0...)
For all other types:
Connector DIN 43 650
Electrical switching values: N/O contact (standard)
max. 250 VAC/DC / 1.5 A / 100 W / 100 VA
changeover contact (standard)
max. 250 VAC/DC / 1 A / 30 W / 60 VA
N/O contact and changeover contact (cCSAus)
max. 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
N/O contact (Ex)
II 2G Ex mb IIC T6 Gb
II 2D Ex mb IIIC T80°C Db IP67
max. 250 VAC / 1.5 A /100 VA
Protection: IP 65 (electr. contact)
IP 54 (side display)

VKM
VKM K11/0118 page 13
VKM-7..
Evaluating electronics: Digital indication, bargraph indication or
combined indication (digital/bargraph)
For technical information please see the operating instructions for ADI.
VKM-8..
display: 3-digit LED display
indication: semi conductor PNP or NPN
Analogue output: 4–20 mA, 3 wire version
max. 500 linear
Auxiliary power: 24 VDC +-20%
Max. temperature: +80° C
Electrical conn.: plug M12x1

VKM
page 14 VKM K11/0118
11. Order Codes
Viscosity-compensated flow switches model: VKM-1...
Measuring
range
L/min oil
Pressure loss
P (bar) at
rated flow*
Brass Stainless
steel Contact Connection Option special
connect.
Flow
direction
min. max.
0.01…0.07 0.02 1.0 VKM-1101... VKM-1201...
..R0... = 1 N/O contact
..U0... = 1 changeover contact
..F0... = 1 EX N/O 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 ..N08 = 1/4 NPT
0= without
option
B= outlet
female
thread
inlet
BVB
manifold
B = from bottom
T = from top
L = from left
R = from right
0.1...0.45 0.03 0.8
VKM-1102... VKM-1202...
0.2...1.2 0.05 1.1
VKM-1103... VKM-1203...
..R08 = G 1/4
..R15 = G 1/2 ..N08 = 1/4 NPT ..N15 = 1/2 NPT
0.5...2 0.07 1.2
VKM-1104... VKM-1204...
0.8...3.4 0.05 0.9
VKM-1105... VKM-1205...
3...9 0.05 0.8
VKM-1106... VKM-1206...
4...14 0.08 1.1
VKM-1107... VKM-1207... ..R15 = G 1/2
..R20 = G 3/4 ..N15 = 1/2 NPT ..N20 = 3/4 NPT
5...20 0.05 1.1
VKM-1108... VKM-1208...
4...40 0.1 0.4
VKM-1109... VKM-1209... ..R20 = G 3/4
..R25 = G 1 ..N20 = 3/4 NPT ..N25 = 1 NPT
5...55 0.15 1.1
VKM-1110... VKM-1210...
7...70 0.15 1.1
VKM-1111... VKM-1211...
8...80 0.15 1.1
VKM-1112... VKM-1212... ..R25= G 1 ..N25 = 1 NPT
* Pressure loss refers to water
Viscosity-compensated flow meters model: VKM-2...
Measuring
range
L/min oil
Pressure loss
P [bar] at
rated flow*
Brass Stainless
steel Contact Connection Option special
connect.
Flow
direction
min. max.
0.01…0.07 0.02 1.0
VKM-2101... VKM-2201...
00..= without contact
..R08 = G 1/4 ..N08 = 1/4 NPT 0= without
option
B= outlet
female
thread
inlet BVB
manifold
B = from bottom
T = from top
L = from left
R = from right
0.1...0.45 0.03 0.8
VKM-2102... VKM-2202...
0.2...1.2 0.05 1.1
VKM-2103... VKM-2203... ..R08 = G 1/4
..R15 = G 1/2 ..N08 = 1/4 NPT ..N15 = 1/2 NPT
0.5...2 0.07 1.2
VKM-2104... VKM-2204...
0.8...3.4 0.05 0.9
VKM-2105... VKM-2205...
3...9 0.05 0.8
VKM-2106... VKM-2206...
4...14 0.08 1.1
VKM-2107... VKM-2207... ..R15 = G 1/2
..R20 = G 3/4 ..N15 = 1/2 NPT ..N20 = 3/4 NPT
5...20 0.05 1.1
VKM-2108... VKM-2208...
4...40 0.1 0.4
VKM-2109... VKM-2209... ..R20 = G 3/4
..R25 = G 1 ..N20 = 3/4 NPT ..N25 = 1 NPT
5...55 0.15 1.1
VKM-2110... VKM-2210...
7...70 0.15 1.1
VKM-2111... VKM-2211...
8...80 0.15 1.1
VKM-2112... VKM-2212... ..R25= G 1 ..N25 = 1 NPT
* Pressure loss refers to water
Viscosity-compensated flow meters model: VKM-3...
Measuring
range
L/min oil
Pressure loss
P [bar] at
rated flow*
Brass Stainless
steel Contact Connection Option special
connect.
Flow
direction
min. max.
0.01…0.07 0.02 1.0
VKM-3101... VKM-3201... ...R0... = 1 N/O contact
...U0... = 1 changeover contact
...F0... = 1 EX N/O 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 ..N08 = 1/4 NPT 0= without
option
B= outlet
female
thread
inlet
BVB
manifold
B = from bottom
T = from top
L = from left
R = from right
0.1...0.45 0.03 0.8
VKM-3102... VKM-3202...
0.2...1.2 0.05 1.1
VKM-3103... VKM-3203... ..R08 = G 1/4
..R15 = G 1/2 ..N08 = 1/4 NPT
..N15 = 1/2 NPT
0.5...2 0.07 1.2
VKM-3104... VKM-3204...
0.8...3.4 0.05 0.9
VKM-3105... VKM-3205...
3...9 0.05 0.8
VKM-3106... VKM-3206...
4...14 0.08 1.1
VKM-3107... VKM-3207... ..R15 = G 1/2
..R20 = G 3/4 ..N15 = 1/2 NPT
..N20 = 3/4 NPT
5...20 0.05 1.1
VKM-3108... VKM-3208...
4...40 0.1 0.4
VKM-3109... VKM-3209... ..R20 = G 3/4
..R25 = G 1 ..N20 = 3/4 NPT
..N25 = 1 NPT
5...55 0.15 1.1
VKM-3110... VKM-3210...
7...70 0.15 1.1
VKM-3111... VKM-3211...
8...80 0.15 1.1
VKM-3112... VKM-3212... ..R25= G 1 ..N25 = 1 NPT
* Pressure loss refers to water

VKM
VKM K11/0118 page 15
Viscosity-compensated flow meter with evaluating electronics model: VKM-7...
Measuring
range L/min
oil approx.
Pressure loss
P [bar] at
rated flow*
Brass Stainless
steel Output Connection Flow direction
min. max. Standard Sonder
0.01-0.063 0.02 1.0 VKM-7101... VKM-7201...
…K04… = combination ind.
100-240 VAC/DC,
±10% (50-60 Hz)
…K34…= combination ind.
10-40 VDC,
18-30 VAC 50/60 Hz
..R08 = G 1/4 ..N08 = 1/4 NPT
B = from
bottom
T = from top
L = from left
R = from right
0.1...0.4 0.03 0.8
VKM-7102... VKM-7202...
0.2...1.1 0.05 1.1
VKM-7103... VKM-7203...
..R08 = G 1/4
..R15 = G 1/2 ..N08 = 1/4 NPT ..N15 = 1/2 NPT
0.5...1.8 0.07 1.2
VKM-7104... VKM-7204...
0.8...3.1 0.05 0.9
VKM-7105... VKM-7205...
3...8.1 0.05 0.8
VKM-7106... VKM-7206...
4...12.6 0.08 1.1
VKM-7107... VKM-7207... ..R15 = G 1/2
..R20 = G 3/4 ..N15 = 1/2 NPT ..N20 = 3/4 NPT
5...18 0.05 1.1
VKM-7108... VKM-7208...
4...36 0.1 0.4
VKM-7109... VKM-7209... ..R20 = G 3/4
..R25 = G 1 ..N20 = 3/4 NPT ..N25 = 1 NPT
5...50 0.15 1.1
VKM-7110... VKM-7210...
7...63 0.15 1.1
VKM-7111... VKM-7211...
8...72 0.15 1.1
VKM-7112... VKM-7212... ..R25= G 1 ..N25 = 1 NPT
* Pressure loss refers to water
Viscosity-compensated flow meter with compact electronics model: VKM-8…
Measuring
range L/min
oil approx.
Pressure loss
P [bar] at
rated flow*
Brass Stainless
steel Output Connection Flow direction
min. max.
0.01-0.063 0.02 1.0
VKM-8101... VKM-8201...
…C0R… = compact electr.
24 VDC, 2x PNP
...C0M... = compact electr.
24 VDC, 2xNPN
...C4P... = compact electr.
24 VDC, 4-20 mA,
1xPNP
...C4N... = compact electr.
24 VDC, 4-20 mA,
1x NPN
..R08 = G 1/4 ..N08 = 1/4 NPT
B = from bottom
T = from top
L = from left
R = from right
0.1...0.4 0.03 0.8
VKM-8102... VKM-8202...
0.2...1.1 0.05 1.1
VKM-8103... VKM-8203...
..R08 = G 1/4
..R15 = G 1/2 ..N08 = 1/4 NPT ..N15 = 1/2 NPT
0.5...1.8 0.07 1.2
VKM-8104... VKM-8204...
0.8...3.1 0.05 0.9
VKM-8105... VKM-8205...
3...8.1 0.05 0.8
VKM-8106... VKM-8206...
4...12.6 0.08 1.1
VKM-8107... VKM-8207... ..R15 = G 1/2
..R20 = G 3/4 ..N15 = 1/2 NPT ..N20 = 3/4 NPT
5...18 0.05 1.1
VKM-8108... VKM-8208...
4...36 0.1 0.4
VKM-8109... VKM-8208... ..R20 = G 3/4
..R25 = G 1 ..N20 = 3/4 NPT ..N25 = 1 NPT
5...50 0.15 1.1
VKM-8110... VKM-8210...
7...63 0.15 1.1
VKM-8111... VKM-8211...
8...72 0.15 1.1
VKM-8112... VKM-8212... ..R25= G 1 ..N25 = 1 NPT
* Pressure loss refers to water

VKM
page 16 VKM K11/0118
12. Maintenance
In cases where the medium to be measured is uncontaminated, the models VKM
are almost maintenance-free. However where calcium or dirt deposits form in the
housing or other internal parts, the instruments should be regularly cleaned.
With a suitable open-ended spanner, remove the instrument from the pipe. After
removal of the uppermost threaded connection, the internal parts may be
removed for cleaning. The internal parts can be cleaned with a suitable brush.
After cleaning reassemble the instrument in the correct order of assembly.
Please note that the spring must be installed into the nipple of the upper threaded
connection and onto the float body. The lower end of the float with the inserted
orifice is located at the fluid inlet side.
13. Dimensions
Model Square
(mm) Length (mm) Connection SW (mm) Connection Weight* (kg)
VKM-..01 40x40 162 36 1,7
VKM-..02 40x40 162 36 1,7
VKM-..03 40x40 162 36 1,7
VKM-..04 40x40 162 36 1,7
VKM-..05 40x40 162 36 1,7
VKM-..07 40x40 162 36 1,6
VKM-..08 40x40 162 36 1,6
VKM-..09 40x40 162 (186,5)** 36 (41)** 1,7
VKM-..10 40x40 162 (186,5)** 36 (41)** 1,7
VKM-..11 40x40 162 (186,5)** 36 (41)** 1,7
VKM-..12 40x40 186,5 41 1,7
* Weight valid for: VKM-1.., VKM-2... ** at G1 or 1 NPT
for model VKM-3... + 0,1 kg
for model VKM-7... + 1,4 kg

VKM
VKM K11/0118 page 17
VKM-1.., VKM-2.., VKM-3..
VKM-7... VKM-8...

VKM
page 18 VKM K11/0118
Ex contact for VKM-..F0..
Housing Meas. “L”
40x40 42
14. Recommended Spare-Parts
Only the instrument parts and material are listed. Depending on the instrument
type the parts are available in various sizes (when ordering please indicate
instrument type).
1.1) Float Brass 5.1) N/O contact (standard)
1.2) Float Stainless Steel 5.2) Changeover contact (standard)
2.1) Slotted-nozzle Brass 5.3) N/O contact Ex
2.2) Slotted-nozzle Stainless Steel 5.4) N/O contact (cCSAus)
3.1) Spring St. Steel 5.5) Changeover contact (cCSAus)
4.1) O-Ring set NBR
4.2) O-Ring set FPM
Flow direc tion

VKM
VKM K11/0118 page 19
15. Declaration of the Manufacturer (VKM)
Declaration for equipment without a potential igniting source according to
the explosion protection guideline 2014/34/EU (ATEX 95).
We, KOBOLD Messring GmbH, herewith declare that the following units and/or
assembly groups:
Viscosity Compensated Flow Meter / Monitor model: VKM-***
according to guideline 2014/34/EU, article 1 paragraph 2 and 3 are
a. no safety, controlling and regulating equipment,
b. no devices,
c. no protection systems and
d. no components.
The All-Metal Flow Monitor does not have a potential igniting source of its own as
a mechanical operating device; it does not get any identification according to the
guideline 2014/34/EU ("ATEX 100a”).
The attachable contact at the sides is part and parcel of an own check and
requires certificates and/or approvals.
The units / assembly groups can be used as follows:
a. In the Zone 2 (Gas-Ex, Cat. 3G) in explosion group of IIA, IIB and IIC
b. In the Zone 22 (Dust-Ex, Category 3D) with non-conductive dusts with a
minimum igniting energy of > 3 mJ
c. In the Zone 1 (Gas-Ex, Cat. 2G) in explosion group of IIA, IIB and IIC
d. In the Zone 21 (Dust-Ex, Category 2D) with non-conductive dusts with a
minimum igniting energy of > 3 mJ
The heating is negligible, a limit value of 20 K must be accounted for the ambient
temperature and the temperature classification and/or the maximum surface
temperature.
The following harmonised norms were used in the current version applicable on
the date of signature.
EN 1127-1 Potentially Explosive Atmosphere, Explosion Protection, part 1:
Basics and Methodology

VKM
page 20 VKM K11/0118
The operation instructions with the broader details listed therein and the
installation regulations for the potentially explosive atmosphere should be
observed. Some essential measures are:
a. The Flow Meter / -Switch has to involved in the potential equalisation
system.
b. Add-on control contacts can under application of EN 60079-14 article
12.2.1 be used as simple electrical equipment without any additional
marking in intrinsically safe equipment.
c. Add-on control contacts with an own EU type examination test can be
used, however, are not subject to this declaration.
Hofheim, 18. Oct. 2016 H. Peters M. Wenzel
General Manager Proxy Holder