Kobold MAN-D Series User manual

Operating Instructions
for
Diaphragm Differential Pressure Gauges
Model: MAN-D...

MAN-D
page 2 MAN-D... K02/0522
We don’t accept warranty and liability claims neither upon this publication nor in
case of improper treatment of the described products.
The document may contain technical inaccuracies and typographical errors. The
content will be revised on a regular basis. These changes will be implemented in
later versions. The described products can be improved and changed at any time
without prior notice.
© Copyright
All rights reserved.
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
2.1Notes on the machine and pressure equipment directive .................... 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 4
6.Mechanical Connection ................................................................................. 5
6.1Installation ............................................................................................ 5
6.2Bracket ................................................................................................. 6
7.Electrical Connection .................................................................................... 6
8.Operation / Configuration / Adjustments ....................................................... 7
8.1Leak testing ......................................................................................... 7
8.2Permissible vibration load at the mounting point .................................. 7
9.Commissioning.............................................................................................. 8
9.1Application information......................................................................... 8
10.Maintenance ................................................................................................. 8
11.Technical Information .................................................................................... 9
12.Dimensions ................................................................................................. 12
13.EU Declaration of Conformance ................................................................. 16
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

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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.
2.1 Notes on the machine and pressure equipment directive
When used in machines, the MAN-D should be used only when the machines fulfil
the EC-machine guidelines.
as per PED 2014/68/EU
"Pressure gauges with a volume ≤ 0.1 L"
In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the PED
2014/68/EU no CE mark.
Diagram 2
Vessels referred to in Article 4(1)(a)(i), second indent
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:
 Diaphragm Differential Pressure Gauges model: MAN-D...

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4. Regulation Use
Any use of the Diaphragm Differential Pressure Gauges, model: MAN-D..., which
exceeds the manufacturer’s 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
Differential pressure gauges with diaphragms are suitable for liquid or gaseous
media, that are neither crystallise nor highly viscous. Due to the materials available
these pressure gauges can also be used for chemically aggressive media. Fully
stainless steel pressure gauges are ideally suited for use with chemically
aggressive ambient conditions. These are used wherever the differential pressure
resulting between intake and delivery pressures are to be displayed.

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6. Mechanical Connection
 In accordance with the general technical regulations for pressure gauges
(i.e. EN 837-2 „Selection and installation recommendations for pressure
gauges“).
 When screwing gauges in, the force required for this must not be applied
through the case, but rather through the spanner flats (using a suitable tool)
provided for this purpose on the square shaft of standard connections.
 When sealing pressure connections must only be hold at the measuring
system flange (not on display housing or rectangular pole)
6.1 Installation
 Nominal position per EN 837-3 / 9.6.6 Figure 7: 90° ( ⊥ )
 Process connection: lower mount (LM)
 Connection: according to the specified symbols + and –
+ = higher working pressure (static pressure)
- = lower working pressure (static pressure)
 In order to ensure that, by the Model with safety features, pressure can be
safely and reliably vented through the case back, a distance of at least 15
mm must be left free behind the case!
 Before mounting gauges, the measuring lines must be efficient cleaned by
tapping, blowing or rinsing. Measuring gauges must be vibration-free
mounted and operated. Also measuring gauges must be protected from
pollution and high temperature variation. Maximum permissible medium- /
ambient temperature must be not exceeded.
 In order to avoid any additional heating, the instruments must not be
exposed to direct solar irradiation while in operation!
 With filled versions the ventilating valve at the top of the case must be
opened prior to commissioning!

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6.2 Bracket
 via rigid pressure connection tailpipes or
 via fixing bores for wall mounting or
 via surface mounting flange, back for panel mounting or
 via surface mounting flange, front for panel mounting or
 via surface mounting brackets for wall- and pipe mounting
7. Electrical Connection
(for gauges with electrical additional facilities)
Works with screw terminals in the cable junction box according to wiring diagram
inscription at the housing.

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8. Operation / Configuration / Adjustments
8.1 Leak testing
Before starting up, all pressure lines, fittings and other components of the
pressurized system circuit must be tested for leaks.
Test methods: - pressure drop method
- shut off the line circuit, pressure drop observed on time
and / or
- method of blowing
- spraying relevant surfaces by means soap bubbles
medium - a possible blowing magnification is observed
8.2 Permissible vibration load at the mounting point
 The instruments should always be installed in locations free from vibration.
 If necessary, it is possible to isolate the instrument from the mounting point
by installing a flexible connection line between the measuring point and the
pressure gauge and mounting the instrument on a suitable bracket.
 If this is not possible, the following limit values must not be exceeded:
Dry gauges: Frequency range < 150 Hz Acceleration < 0.7 g (7 m/s2)
Liquid-filled gauges: Frequency range < 150 Hz
Acceleration < 4 g (40 m/s2)
The liquid filling must be checked on a regular basis.
The liquid level must not drop below 75 % of the gauge diameter.

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9. Commissioning
Differential pressure gauge is ready for use, if:
- pressure connections are manufactured and
- the electrical connection (for gauges with electrical additional facilities) is
connected as specified.
Zero point must be checked after mounting and adjusted if necessary.
For inspection, the connection cables must be depressurized.
With deviation from the zero error tolerance, the zero point can be adjusted via
screw driver at the adjustable pointer at standard pressure gauges.
Pressure loads, maximum working pressure (static pressure) and overload-limits
must be complied with range of application.
Pressure surges (rapid pressure changes) must be avoided. By using valves by
carefully or slowly valve actuation.
Over pressure overloads (more than the specified overload limits) lead to
equipment failure if device-related no safety measures are taken.
9.1 Application information
For dangerous materials, such as for example oxygen, acetylene, flammable and
toxic substances, as well as sewage treatment plants, pressure tanks etc., the
existing rules beyond the general rules must be followed.
10. Maintenance
The differential pressure gauges require no maintenance or servicing and by
correct handling / operating they are characterized for a long economic life-time.
When the zero-point during long-time service, particularly during frequent load
changes, changed itself more than ± 20% of full scale value, we recommend for
safety reasons a checking in our company.
The indicator should be checked once or twice every 12 months.
The instrument must be disconnected from the process to check with a pressure
testing device.
The instruments should be cleaned with a damp cloth moistened (with soap
solution).
Any residual pressure medium contained in the pressure element may be
hazardous or toxic. This should be taken into account when handling and storing
pressure gauges which have been removed.

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11. Technical Information

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