Wohler M 603 User manual

The Measure of Technology
Operating Manual
Pressure Meter
Part 1
Order No. 24811– 2023-01-18
Wöhler M 603

General information
2
Contents
1General information..............................4
1.1 Initial start-up................................................. 4
1.2 Information about this operating manual ....... 4
1.3 Notes............................................................. 4
1.4 Intended use ................................................. 4
1.5 Components.................................................. 5
1.6 Transportation............................................... 5
1.7 Disposal ........................................................ 5
1.8 Manufacturer................................................. 6
2Important information ..........................6
3Specification..........................................7
3.1 Measured values........................................... 7
3.2 Calculated values.......................................... 9
3.3 Logger function ........................................... 10
3.4 Technical data............................................. 11
4Layout and functions .........................12
4.1 Basic device ................................................ 12
4.2 Connector panel.......................................... 12
4.3 Protective covers......................................... 14
4.4 Sensors and connection components ......... 14
4.5 Touch display .............................................. 17
5Prior to use ..........................................19
5.1 Charging the battery.................................... 19
5.2 Leak tightness test ...................................... 20
6Starting the unit ..................................20
7Connecting the Wöhler M 603 to one or
more Wöhler SC 660 units..................21
7.1 Connection via the settings menu ............... 22
7.2 Connection during live measurement.......... 23
7.3 Connection prior to pressure testing with water
.................................................................... 24
8Measurements on gas pipes..............25
8.1 Stress test on gas pipes .............................. 26

General information
3
8.2 Leak tightness test on gas pipes..................30
8.3 Usability measurement on gas pipes...........34
8.3.1 Usability testing, volume flow measurement 35
8.3.2 Usability testing, pressure drop method.......44
8.4 Pipe volume measurement ..........................51
8.4.1 Pipe volume measurement, automatic........51
8.4.2 Pipe volume measurement, manual ............ 52
8.5 Regulator test ..............................................56
8.6 Regulator test ..............................................56
9Measurements on water pipes .......... 60
9.1 Leak tightness tests performed with air on
drinking water pipes.....................................60
9.1.1 Preparations for the measurement ..............61
9.2 Stress tests performed with air on drinking
water pipes .................................................. 65
9.3 Pressure testing with water on water pipes . 71
9.4 Leak tightness testing of wastewater pipes in
accordance with DIN EN 1610..................... 75
9.4.1 Sensors and connection components..........75
9.4.2 Operating principle.......................................75
9.4.3 Sealing the pipe section............................... 76
9.4.4 Presets ........................................................82
9.4.5 Measurement............................................... 84
10 Live measurement ..............................89
11 Pipe location ....................................... 92
11.1.1 Preparations ................................................93
11.1.2 Pipe location ................................................ 95

General information
4
1 General information
1.1 Initial start-up
Fig.
1: Connector panel on the bottom of
the unit
•If the unit cannot be switched on, activate the
battery before using it for the first time by
pushing the lock switch to the right with a
pointed object.
1.2 Information about this
operating manual
This operating manual enables you to work safely
with the Wöhler M 603. Keep this manual in a safe
place so you can refer to it when needed.
The Wöhler M 603 Pressure Meter is intended to
be used solely by trained professionals and must
only be used for its intended purpose.
Liability is excluded for any damages caused by
failure to comply with this manual.
1.3 Notes
WARNING!
Failure to follow this warning can result in injury or
death.
ATTENTION!
Failure to follow this information can result in per-
manent damage to the unit.
NOTE!
Important information
1.4 Intended use
This meter can be used to measure differential
pressure, absolute pressure, flow speed, tempera-
ture, and humidity. It is designed for the following
purposes in particular:
Stress testing and leak testing in accordance with
the German Gas Installations Directive (TRGI
2018 - G 600)
Measurement of leakage rate in accordance with

General information
5
the German Gas Installations Directive (TRGI
2018 - G 600)
Measurement of flow pressure, installation pres-
sure, standing pressure, jet pressure
1.5 Components
Product
Items supplied
Wöhler M 603
Pressure meter
Control report
Measuring hose (1.7 m) with
quick-release connector
USB A / USB C cable
USB power supply unit
1.6 Transportation
ATTENTION!
The unit can be damaged if it is not transported
correctly.
To prevent damage to the unit, always transport it
in the carrying case provided. The pressure con-
nectors must be protected using the protective
cap.
The case is included with the product and can
also be bought separately.
1.7 Disposal
Electronic equipment does not belong in normal
domestic waste and must be disposed of in ac-
cordance with the applicable regulations.
Defective batteries removed from the unit can be
returned to our company or to public battery dis-
posal and recycling points, or to places where
new batteries are sold.

Important information
6
1.8 Manufacturer
Wöhler Technik GmbH
Wöhler-Platz 1
D-33181 Bad Wünnenberg
Tel.: [phone]
Fax: [phone]
E-mail: [e-mail]
2 Important information
WARNING!
Due to the compressibility of gases, for technical safety reasons the relevant accident
prevention regulations (Germany: “Arbeiten an Gasanlagen” / Work on Gas Systems
and Equipment) and the set of rules “Technische Regeln für Gasinstallationen DVGW-
TRGI” (Technical Rules for Gas Installations issued by the German Association for Gas
and Water) must be complied with during all pressure tests with air or inert gas.

Specification
7
3 Specification
3.1 Measured values
Differential pressure measurement
(temperature-compensated piezo
bridge)
Description
Reading
Measuring range
± 3,000 hPa
Permissible overload
± 3,200 hPa
Accuracy
< 3% of the measured
value; in the range < ±
2 hPa better than ±
0.06 hPa
Resolution
0.01 Pa in the range
from
–210 hPa to
+210 hPa,
otherwise 0.1 hPa
Leakage amount (usability meas-
urement)
Description
Reading
Measuring range
0.0 l/h to 10.0 l/h, test-
ed up to 8 l/h
Accuracy
± 0.2 l/h
in the range from 0 to
4 l/h, otherwise 5% of
the measured value
Resolution
0.1 l/h
Internal temperature measurement
Description
Reading
Measuring range
-20°C to 60°C
Accuracy
< ± 1°C
Resolution
0.1°C

Specification
8
External temperature measure-
ment
(optional, e.g. with a temperature
clamp probe or surface tempera-
ture sensor)
Description
Reading
Measuring range
2 channels, -20.0°C to
+800.0°C
Accuracy
< ± 1°C in the range from
-20°C to 67°C,
otherwise 1.5% of the
measured value,
in acc. with EN 50379-1
Resolution
0.1°C
Humidity measurement
Description
Reading
Measuring range
0% to 100% RH (relative
humidity), non-condensing
Accuracy
± 5% RH
Resolution
0.1% RH
Response time
Up to 180 min.
Absolute pressure
Description
Reading
Measuring range
300 hPa to 1100 hPa
Accuracy
± 2 hPa
Resolution
0.1 hPa

Specification
9
3.2 Calculated values
Calculated
parameter
Calculation
Pressure units
Conversion to hPa, Pa,
mmH2O, PSI, inwc, bar, mbar
in accordance with the gen-
erally accepted conversion
guidelines.
Temperature
units
Conversion from °C to °F in
accordance with the general-
ly accepted conversion
guidelines.
Pipe volumes
Automatic from 0.0 to 1000.0
l
Calculated
parameter
Calculation
Leakage rate
Fully-automatic (class V): 0.0
l/h to 10.0 l/h
Gas leakage amount based
on the measured pressure
difference under simultane-
ous supply of a defined vol-
ume to maintain constant
pressure
in accordance with DVGW-
TRGI worksheet G 600 in l/h.

Specification
10
3.3 Logger function
Description
Reading
Scope
9999 measurements,
each with measured
values for pressure and
humidity, as well as
three measured val-
ues for temperature
(with external sensors
connected) with freely
selectable scanning
intervals ranging from
1 second to 24 h can
be saved in the inter-
nal memory.
USB data transmis-
sion
Online data, perma-
nent, already during
registration
Bluetooth data trans-
mission
Selectable scanning
intervals
Intervals can be freely
chosen in the range
from 1 second to 24 h
IMPORTANT!
For recordings that take a long time we recom-
mend connecting the unit to the mains.