Kobold URM User manual
Operating instructions
for
Variable area flow meter
Model URM
URM
page 2 URM K04/0817
1. Contents
1. Contents..................................................................................................................2
2. Note......................................................................................................................... 3
3. Instrument inspection.............................................................................................. 3
4. Regulation use........................................................................................................3
5. Operating principle.................................................................................................. 3
6. Mechanical connection............................................................................................ 4
7. Electrical connection...............................................................................................4
7.1. Inductive switch (option) ................................................................................4
8. Operation ................................................................................................................ 4
9. Maintenance............................................................................................................ 5
10. Technical information.............................................................................................. 5
11. Order codes ............................................................................................................ 6
12. Dimensions ............................................................................................................. 7
13. EU Declaration of conformance.............................................................................. 8
Manufactured by: Sold by:
Kobold-Unirota Ltd. Kobold Messring GmbH
4400 Nyíregyháza Nordring 22-24
Derkovits út 132-136. D-65719 Hofheim
Tel.: +36-42-342-215 Tel.: +49(0)6192-2990
Fax: +36-42-500-175 Fax: +49(0)6192-23398
Internet: www.unirota.hu Internet: www.kobold.com
URM
URM K04/0817 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 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.
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.
pipeline
filled with
gas liquids
group 2 group 1 group 2
table 7 table 8 table 9
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:
• Variable area flow meter: URM
• Operating instructions
• Inductive switch (option)
4. Regulation use
Any use of the variable area flow meter, model: URM, 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.
URM
page 4 URM K04/0817
5. Operating principle
The Kobold URM model flowmeter/monitor works on the basis of the suspended float
principle. It is used for measuring the flow rates in closed pipe line systems.
The medium flows from below through a glass measuring cone that gets wider on top. Thus,
the float is raised and indicates the respective flow rate on the scale provided on the
measuring cone. To monitor flow rate limits, the URM meters can be optionally furnished with
“open collector“ proximity switches.
By its special design, this model is particularly suitable for applications where only
very small operating pressures are available. Another advantage is offered by the
very large sight glass which optically allows direct flow observation.
6. Mechanical connection
Before Installation:
• Remove all transportation safety locks and ensure that no packing material
remains within the unit.
• Be sure that the maximum allowable operating pressure and temperature is not
exceeded (see Technical data).
• Install the flow meter in the piping system, ensure the instrument is under no
mechanical stress/tension (install support bracing if necessary).
• Protect the measuring tube from external damage.
• Avoid pressure peaks in the measuring tube, e.g. from sudden surges or stoppage
of flow.
• If possible, immediately after making mechanical connections, check whether the
connections are properly sealed with no evidence of leakage
7. Electrical connection
7.1. Inductive switch (option)
• Make sure that the supply wires are de-energized.
• housing.
URM
URM K04/0817 page 5
8. Operation
In order to initialise the inductive switch function, it is essential that the float
activates the contact once in each direction.
Adjustment of limit-values
The switch-point can be adjusted to the desired levels by using.
Reference edge: approx. the middle of the sensor.
Slide the switch housing up or down until the reference edge coincides with the desired
switch-point scale reading.
Overranging
With non-pulsating flow, the maximum flow rate can be exceeded. Only an increase in
pressure loss will result (max. permissible operating pressure must not be exceeded!)
9. Maintenance
If the medium to be measured is clean, the series URM is virtually maintenance-free. If
deposits form on the inner housing or parts, periodic cleaning of the unit is recommended.
Remove the units from the piping with a suitable tool; clean the flow meter with a suitable
cleaning agent or make use of an ultrasonic bath.
10. Technical information
Installation position: vertical
Accuracy class: 4 acc. to VDI
Max. temperature: 100°C (65°C for PVC)
Max. pressure: 6 bar
Calibration conditions: water: 20°C, air: 20°C,
air pressure: 1.013 bar abs.
Ambient temperature: -25…+70°C
Protective category: IP 67
Contact (optional): proximity switch: PNP
open collector, n/o contact
supply voltage: 12…24 VDC
current consumption: 10 mA max.
cable: 2 m, PVC-insulated
URM
page 6 URM K04/0817
Material combinations
Ordering
code Connection Float Seal Ring Measuring
cone Housing
33 1.4301 1.4301 NBR PVC
borosilicate
glass st.st. 1.4301
55 1.4404 1.4404 FPM PTFE
99* 1.4301
1.4404
1.4301
1.4404
aluminium
PTFE
PVC
PP
NBR
EPDM
FPM
PTFE
PVC
PTFE
1.4301
* Customer specification on request
URM
URM K04/0817 page 7
11. Order codes
Model
Material
combi-
nation Instrument
length
Measuring range Pressure
loss
[mbar]
Thread connection
Contactswater [L/h] air [Nm³/h] female male
URM- 33
55
99**
210 mm
01H = 0.25…2.5 01L = 0.0032…0.032 6
I2 = G ¼
I3 = G 3⁄8 G3 = G 3⁄8
G4 = G ½
0 = no contact
03H = 0.4…4 03L = 0.008…0.08 6
05H = 0.63…6.3 05L = 0.02…0.2 8
07H = 1…10 07L = 0.032…0.32 10
09H = 1.6…16 09L = 0.05…0.5 10
360 mm
- 11L = 0.02…0.2 10
I2 = G ¼
I3 = G 3⁄8 G3 = G 3⁄8
G4 = G ½
13H = 1…10 13L = 0.032…0.32 10
15H = 1.6…16 15L = 0.05…0.5 10
17H = 2.5…25 17L = 0.08…0.8 12
19H = 4.0…40 19L = 0.13…1.3 12
360 mm
22H = 6.3…63 22L = 0.2…2.0 17
I3 = G 3⁄8
I4 = G ½
G3 = G3⁄8
G4 = G ½
G5 = G ¾
0 = no contact
P*= 1 PNP
normally open
R*= 2 PNP
normally open
24H = 10…100 24L = 0.32…3.2 24
26H = 16…160 26L = 0.5…5.0 28
28H = 25…250 28L = 0.8…8.0 25
360 mm
33H = 40…400 33L = 1.3…13 36 I4 = G ½
I5 = G ¾
G4 = G ½
G5 = G ¾
G6 = G 1
35H = 63…630 35L = 2.0…20 34
37H = 100…1
000 37L = 3.2…32 43
440 mm
43H = 100…1
000 43L = 3.2…32 43 I5 = G ¾
I6 = G 1
G5 = G¾
G6 = G 1
G7 = G 1
¼
G8
= G 1
½
45H = 160…1
600 45L = 5.0…50 48
47H = 250…2
500 47L = 8.0…80 51
440 mm
53H = 400…4
000 53L = 13…130 51 I6 = G 1
I7 = G 1
¼
I8 = G 1
½
G6 = G 1
G7 = G 1
¼
G8 = G 1
½
G9 = G 2
55H = 630…6
300 55L = 20…200 57
57H = 1
000…10
000 - 70
600 mm
63H = 1
600…16
000 63L
***
= 25…250 93
–
G8 = G 1
½
G9 = G 2
GA= G 2 ½
GB= G 3
65H = 2
500…25
000 65L*** = 32…320 102
*Other switching functions on request
**Customer specification on request
***63L and 65L air ranges only available with aluminum or PTFE float
URM
page 8 URM K04/0817
12. Dimensions
URM
URM K04/0817 page 9
13. EU Declaration of conformance
We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product:
Variable area flow meter Model: URM
to which this declaration relates is in conformity with the standards noted below:
EN 61000-6-2:2006 Immunity industrial environment
EN 61000-6-3:2011 Emission residential, commercial
EN 55011:2009+A1:2010 ISM ratio-frequency equipment
EN 61326-1:2013 Electrical equipment for measurement, control and
laboratory use – EMC requirements
EN 61010-1:2011 Safety requirements for electrical measuring, control
and laboratory devices
Also the following EC guidelines are fulfilled:
2014/30/EU EMC Directive
2011/65/EU RoHS (category 9)
EN 50581:2012 Technical documentation for the assessment of electrical
and electronic products with respect to the restriction of hazardous substances
Hofheim, 16. August 2017
H. Peters M. Wenzel
General Manager Proxy Holder
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