Kobold MAK User manual

Operating Instructions
for
Thermal Mass Flow Meter
Model: MAK

MAK
page 2 MAK K01/0323
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
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 3
5.Operating Principle ........................................................................................ 4
6.Mechanical Connection ................................................................................. 5
6.1lnstallation and piping .......................................................................... 5
7.Electrical Connection .................................................................................... 7
8.Operation / Configuration / Adjustments ....................................................... 8
8.1Warming up ......................................................................................... 8
8.2Operating procedure ............................................................................ 8
8.3Zero adjustment mode ....................................................................... 10
8.4Flow rate indication ............................................................................ 10
8.5[Parameter setting mode] ................................................................... 12
9.Troubleshooting .......................................................................................... 17
10.Maintenance/storage ................................................................................... 18
10.1Cleaning the inlet and outlet joints ..................................................... 18
10.2Storage .............................................................................................. 18
11.Technical Information .................................................................................. 19
12.Order Codes ............................................................................................... 19
13.Dimensions ................................................................................................. 19
14.Disposal ...................................................................................................... 20
15.EU Declaration of Conformance ................................................................. 21
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

MAK
MAK K01/0323 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.
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com
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 machinery directive.
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:
 Thermal Mass Flow Meter model: MAK
4. Regulation Use
Any use of the device, 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.

MAK
page 4 MAK K01/0323
5. Operating Principle
The new MAK series KOBOLD digital mass flowmeters have been specially
developed for use in gas measurement, where excellent accuracy, high reliability,
robust casing, stainless materials and maximum flexibility are important.
MAK is equipped with an indicator that employs a proven flow sensor. It has a
function to indicate the integrated flow rate, in addition to the existing instantaneous
flow rate indication.
A model with a flow sensor and precision needle valve in one unit is also available.
Theory of Operation
The medium flows through the bypass measuring system. The resulting differential
pressure between P1 and P2 causes a small amount of gas to flow through the
overhead measuring tube. The separation ratio is constant.
Two resistance temperature detectors (RTD elements) transferring a constant
amount of heat to the gas stream are mounted on the measuring tube.
Under flow conditions, the gas molecules absorb and transport the heat away. This
gives rise to a temperature difference between the two detector coils, which causes
a change in resistance in the detector coils, whereby R1 <> R2. The electronics
converts the signal for indication. The temperature difference increases as the flow
increases.
Measuring tube design
Flow diagram

MAK
MAK K01/0323 page 5
6. Mechanical Connection
(1) Use the equipment within the pressure range shown in the specification.
(2) Use the equipment at the ambient temperature and humidity shown in the
specification.
(3) This is precision equipment. Keep it protected against strong shock.
Caution! Do not apply a pressure exceeding the allowable level. Otherwise,
the product may be damaged.
This product is precision equipment. Exercise caution to protect it from
shocks by, for example, falling and hitting. Otherwise, the product may be
damaged.
6.1 lnstallation and piping
 lnstallation place
 This equipment is designed for indoor use.
Never install the equipment in a place where it is likely to be wetted by
water or rain.
The equipment may fail. lnstall the equipment in a place where
sufficient ventilation is provided and changes in humidity are minimal.
 lnstall the equipment in a place free of vibration and impact.
 Do not use the equipment under direct sunlight or at high
temperature/humidity.
 lnstall the equipment in a place free of dust.
 lnstall the product in a place free of corrosive gases.
 lnstall the product in a place free of a strong electric/magnetic field.
The frame to fix the block shall be connected to an electrically stable
point (e.g. being grounded).
 lnstall the product in a place where ambient temperature is 15 to 35℃.
 Lay piping so that the flow direction matches the arrow (►) shown on the
body.
 Install the product horizontally.
 lnstall the product in such a way that the LED/switches do not face downward.
 Be sure to install a line filter (100 µm or finer) on the inlet side of gas.
 Where complete shutoff is required, provide a shutoff valve.
 To use a highly reactive gas, be sure to conduct complete purge with inert
gas before and after use.
lnstallation method
lnstall the product with two M4 screws from the back using threaded holes on the
bottom. For the location of threaded holes, see Dimensions.

MAK
page 6 MAK K01/0323
Warning!
 Never let gas exceeding the explosion limit flow to the product.
Otherwise, it may cause explosion accidents
 Never use the product the gas contact part of which has not been
degreased (oil-free treatment) for oxygen. Otherwise, a fire may
break out. Even when the product has been degreased, if it has been
used for a gas other than oxygen, never use it for oxygen.
Caution!
 Ensure that no foreign matter will flow into the product. lf piping rust,
water droplets, oil mist, dust, etc. flow into the product, they may
cause measurement/control errors and damage to the product.
 lf there is a possibility that foreign matter will flow into the product,
install a suitable device such as a filter, strainer and mist trap having a
capacity to remove foreign matter larger than 100m in the upstream and
inspect or replace it periodically.
 The needle valve of this product has not been designed for complete
shutoff. lf complete closing id required, please install a shutoff valve
externally separately.
 Rapid heating to high temperatures can cause serious malfunctions.
 lnstall the product on a horizontal pipe. Ensure that the display will not
face downward
 lnstall the product firmly so that it will not vibrate. Otherwise, it may
malfunction or fail.
 After piping, inspect it to ensure that no gas will leak
 Be sure to use the product within the flow rate range defined in the
product specifications. Also, in order to prevent an excessive flow rate,
control the proper supply pressure and provide instrumentation in
consideration of installation of a throttle valve, etc.
 lf damages are envisaged due to a problem of the product, use a
redundant design.

MAK
MAK K01/0323 page 7
7. Electrical Connection
 Make sure that the supply wires are de-energized.
 Plug in the system according to the connecting diagrams.
DC Jack
Connectors
Product side connector: D-subminiature 9-pin male (M2.6 short screw)
Applicable connectors: D-subminiature 9-pin male (M2.6 short screw)
Pin assignment
Caution! Prior to turning on the power, make sure that the
product has been wired correctly.
Incorrect wiring will cause damage and malfunction.
Pin No. Si
g
nal name Description
1 Power suppl
y
COM Power suppl
y
COM
2 Power suppl
y
+24 V Power suppl
y
+24 V
Pin No. Si
g
nal name Description
1 Power suppl
y
+24 V Power suppl
y
+24 V
2 Power suppl
y
COM Power suppl
y
COM
3 OUT 1 Event output 1
4 OUT 2 Event output 2
5 OUT COM Event output COM
6
A
nalo
g
output
A
nalo
g
output
7 TR+ RS485 communications
8 TR- RS485 communications
9 Analog output COM
TR COM
Analog output COM
RS485 communications COM

MAK
page 8 MAK K01/0323
8. Operation / Configuration / Adjustments
8.1 Warming up
Warm up the equipment at least 15 minutes after it was powered on.
8.2 Operating procedure
Indicator panel
Indicator
lndicates an instantaneous flow rate or integrated flow rate. When lower 4 digits of
the integrated flow rate are indicated, the decimal point is shown.
The decimal point is not shown for upper 4 digits.
During setting, the parameter No. or set value is shown here.
Event out lamps
When the Event output 1 is on, "OUT1" lights and when the Event output 2 is on,
"OUT2" lights
lndication lD lamp
Lights when an instantaneous flow rate is being indicated and flashes when an
integrated flow rate is being indicated.

MAK
MAK K01/0323 page 9
DlSP key [□]
[Measurement]
 Press: Switches over the indication. The indication switches over in the
order of instantaneous flow rate → integrated flow rate (lower 4 digits) →
integrated flow rate (upper 4 digits) → gas type → instantaneous flow rate.
The integrated flow rate (upper 4 digits) is not indicated if the integrated
flow rate value has not reached the upper 4 digits.
 Press & hold: Goes to a setting mode.
 Pressing and holding this key when an instantaneous flow rate is
being indicated shows "Parameter setting mode". Continuing to
press and hold this key after "Parameter setting mode" has
appeared shows "Zero adjustment mode".
 Pressing and holding this key when an integrated flow rate is being
indicated shows "lntegrated flow rate resetting mode".
[Setting]
 Press: Selects items and accepts values entered in each setting mode.
 Press & hold : [Parameter setting mode] Returns to the instantaneous flow
rate indication.
[Zero adjustment mode] When <Yes˃ is shown, the integrated
flow rate is reset.
UP key [ ]/Down key [ ]
[Parameter setting mode]
 Press: Increase/decreases the value of the flashing digit
 Press and hold: Shifts the digit.
[Zero adjustment mode]: switching <Yes˃/<No˃
[Integrated flow rate resetting mode]: switching <Yes˃/<No˃
Caution! This meter has been adjusted in the flow rate in the factory
and adjustment data has been stored in an F-RAM. Please keep in
mind that if several keys on the indicator panel are pressed and held
simultaneously when turning on the power, the indicator shows the
mode where the stored data will be rewritten. When the meter has
entered this mode, turn off the power. lf rewrite has not been
enabled yet, the data may be recovered. lf the
data has been
rewritten, it is necessary to correct the data.

MAK
page 10 MAK K01/0323
8.3 Zero adjustment mode
Stop the flow of gas completely with an instantaneous flow rate being indicated. In
this state, pressing and holding the DISP key [□] shows “Parameter setting mode”
and <F-00˃ will be shown. Continuing to press and hold the key shows “Zero
adjustment mode” and <Yes> will be shown. Switch over <Yes>/<No> with the UP
key [ ]/DOWN key [ ] and when <Yes> is being shown, pressing and holding the
DlSP key [□] completes zero adjustment.
When <No> is being shown, pressing the DlSP key [□] returns to the
instantaneous flow rate indication. (lf flickering of a figure near 0 is annoying,
select the low cut function. The indication of a figure below 0.5% F.S. is cut.)
Caution! lf the indicated value is largely different (2% or more) from
the zero point set in the factory, the zero adjustment is not possible.
ln this case, please contact our sales office or the dealer.
8.4 Flow rate indication
1. Switching over flow rates to indicate
Each time the DlSP key [□] on the flow rate indicator panel is pressed,
indication is switched over in the order of instantaneous flow rate →
integrated flow rate (lower 4 digits) → integrated flow rate (upper 4 digits) →
a pplicable gas. The integrated flow rate (upper 4 digits) will not be indicated,
however, when the integrated flow rate value has not reached the upper 4
digits.

MAK
MAK K01/0323 page 11
2. [Integrated flow rate resetting]
ln the state of integrated flow rate indication setting, press and hold the
DlSP key [□]. Then the indicator will show <yes>. <yes> and <no> can be
switched over with the UP key[ ] or DOWN key[ ].
When <yes> is being shown, pressing and holding the DlSP key [□] causes
<yes> to flash. When the DlSP key [□] is pressed and held, the integrated
flow rate value will be reset.

MAK
page 12 MAK K01/0323
8.5 [Parameter setting mode]
When an instantaneous flow rate is being indicated, pressing and holding DISP
key [□] sets the parameter setting mode. Each time DISP key [□] is pressed, the
indication changes in the order of mode No. → set value → mode No. → set
value.
To change the set value, use the UP key [ ] or DOWN key [ ]. When the UP key
[ ] or DOWN key [ ] is pressed and held, the digit can be shifted.
After setting a parameter, pressing and holding DISP key [□] registers the set value
and returns the mode to the flow rate indication mode.
Default values
※ According to the ordered specifications
Mode No.
Default Value
Set Item
A B C D
F-00
※ ※ ※ ※
Indication of max. value (unchangeable)
P-00 ※
Reference condition on flow rate
P-01 1
Low cut function selection
P-02 3
PV filter
P-03 3
Instantaneous flow rate indication update cycle
P-04 0
Integrated flow rate hold selection
P-05
※
Analog output selection
P-10 0 0
OUT1 output selection
P-11 9 9 9 9
OUT1 instantaneous flow rate upper limit preset setting
P-12 9 9 9 9
OUT1 instantaneous flow rate lower limit preset setting
P-13 3 0
Dead time value
P-14 9 9 9 9
OUT1 integrated flow rate reach preset setting upper 4 digits
P-15 9 9 9 9
OUT1 integrated flow rate reach preset setting lower 4 dig-its
P-16 0 1 0
Integrating pulse output rate
P-20 0 0
OUT2 output selection
P-21 9 9 9 9
OUT2 instantaneous flow rate upper limit preset setting
P-22 9 9 9 9
OUT2 instantaneous flow rate lower limit preset setting
P-23 3 0
Dead time value
P-24 9 9 9 9
OUT2 integrated flow rate reach preset setting upper 4 digits
P-25 9 9 9 9
OUT2 integrated flow rate reach preset setting lower 4 dig-its
P-26 0 1 0
Integrating pulse output rate
P-30 1
Applicable gas selection
P-31 1. 0 0 0
CF value
P-40 1
Communication ID
P-41 2
Transmission speed selection
P-42 0
Parity

MAK
MAK K01/0323 page 13
Setting mode No. and description of set values

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page 14 MAK K01/0323

MAK
MAK K01/0323 page 15

MAK
page 16 MAK K01/0323

MAK
MAK K01/0323 page 17
9. Troubleshooting

MAK
page 18 MAK K01/0323
10. Maintenance/storage
10.1 Cleaning the inlet and outlet joints
When removing the joints for cleaning, conduct the work in clean environment so
that no dust and dirt will enter the product. However, never disassemble or overhaul
the product nor remove the protective seals.
If the product has been disassembled or overhauled or the protective seals have
been removed, it is considered that the user has waived his/her right to warranty
even within the warranty period.
10.2 Storage
lf the product is not put in use for a long time after it was received, unexpected troubles
may occur.
When it is expected that the product will be kept in storage for a long time, take the
following precautions:
(1) Store the product in the package in which it was received from Kobold, wherever
possible.
(2) Store the product in a place described below:
① A place free of rain and water.
② A place free of vibration and impact.
③ A place of normal temperature and normal humidity (around 25℃, 65%).
④ A place free of dust.
⑤ A place free of corrosive gases.
⑥ A place free of a strong electric/magnetic field.
(3) To store the product that has been used, purge it with clean air or N2 so that
measuring gas will not remain in the flow meter. Cover the inlet and outlet sides
(joints) of measuring gas with caps to prevent intrusion of dust and dirt.

MAK
MAK K01/0323 page 19
11. Technical Information
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com
12. Order Codes
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com
13. Dimensions
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com

MAK
page 20 MAK K01/0323
14. Disposal
Note!
 Avoid environmental damage caused by media-contaminated parts
 Dispose of the device and packaging in an environmentally friendly manner
 Comply with applicable national and international disposal regulations and
environmental regulations.
Batteries
Batteries containing pollutants are marked with a sign consisting of a crossed-out
garbage can and the chemical symbol (Cd, Hg, Li or Pb) of the heavy metal that
is decisive for the classification as containing pollutants:
Cd1 Hg2 Pb3 Li4
1. „Cd" stands for cadmium
2. „Hg" stands for mercury
3. „Pb" stands for lead
4. „Li" stands for lithium
Electrical and electronic equipment