Wohler SC 602 User manual

The Measure of Technology
Operation Manual
Smart Connect Pressure Meter
Best.-Nr. 25160– 2023-02-24
Wöhler SC 602

General information
2
Contents
1General information..............................4
1.1 Commissioning on delivery with optional
rechargeable battery ..................................... 4
1.2 Information on the operating instructions ...... 4
1.3 Notes in the operating instructions ................ 4
1.4 Intended use ................................................. 5
1.5 Basic equipment............................................ 6
1.6 Hand strap..................................................... 6
1.7 Transportation ............................................... 6
1.8 Disposal ........................................................ 6
1.9 Manufacturer address ................................... 7
2Specification..........................................8
2.1 Measured values........................................... 8
2.2 Calculated values........................................ 10
2.3 Logger function ........................................... 11
2.4 Technical data............................................. 12
3Structure and functions .....................13
4Switch on.............................................15
4.1 Display indication ........................................ 16
5Make settings directly on the device 18
5.1 Pressure unit selection................................ 18
5.2 Print resolution selection ............................. 18
5.3 Selection of the temperature unit ................ 18
5.4 Switch display illumination on/off................. 18
5.5 Deactivate automatic shutdown function..... 19
5.6 Probes and connection components ........... 20
6Checking the measurement equipment
..............................................................22
7Wöhler Smart Connect App...............23
7.1 System requirements for the end device..... 23
7.1.1 Installing the Wöhler Smart Connect App.... 23
8Measurements on gas pipes..............23
8.1 Stress test on gas pipes .............................. 24

General information
3
8.2 Leak test on gas pipes................................. 29
8.3 Leakage rate test of gas pipelines ............... 33
8.4 Pipe volume measurement .......................... 39
9Measurements on water pipes ..........42
9.1 Leak test performed with air on drinking water
pipes ............................................................ 43
9.1.1 Preperations for the measurement .............. 44
9.2 Stress test on drinking water pipes with air.. 49
10 Battery change....................................55
11 Maintenance........................................55
12 Warranty and Service.........................56
12.1 Warranty ...................................................... 56
12.2 Service......................................................... 56
13 Accessories.........................................57
14 Declaration of Conformity .................58
15 DVGW- certificate ...............................59
Sales and service points ..............................60

General information
4
1 General information
1.1 Commissioning on
delivery with optional
rechargeable battery
Fig
. 1:
Bottom part of battery module Wöhler SC
602, slide switch marked with arrow
If your device is operated with a rechargeable
battery and not with batteries (optional), the
transport lock is set at delivery so that the device
cannot be switched on.
•
In this case, open the battery compartment on
the back of the device.
•
Set the very small black slide switch at the
bottom of the battery module from the off posi-
tion to the on position.
This procedure is only necessary before the initial
start-up.
1.2 Information on the op-
erating instructions
These operating instructions enable you to work
safely with the Wöhler SC 602 Smart Connect.
Keep these operating instructions in a safe place.
The Wöhler SC 602 may only be used by trained
professionals for the intended purpose.
We accept no liability for damage resulting from
failure to observe these operating instructions.
1.3 Notes in the operating
instructions WARNING!
Indicates instructions which, if not
Indicates a risk of injury or death if the instructions
are not followed.
ATTENTION!
Indicates information about hazards that can re-
sult in damage to the device or objects.
NOTE!
Highlights tips and other useful information.

General information
5
1.4 Intended use
The Wöhler SC 602 is to be used for differential
pressure, absolute pressure, temperature meas-
urement as well as humidity registration.
In connection with the app, the device is intended
for the following applications:
Load and leak test and serviceability test (pres-
sure decay method) Flow, system, rest and nozzle
pressure

General information
6
1.5 Basic equipment
Device
Delivery scope
Wöhler SC 602
Wöhler SC 602
Smart Connect
2 batteries 1,5 V
Hand strap and bag
1,5 V
1.6 Hand strap
Fig
. 2: Attachment of the hand strap
below the battery compartment
The Wöhler SC 602 is supplied with a hand strap. If
you want to use the hand strap, mount it as follows
:
•
Remove the battery cover on the back of the
instrument.
•
Hang the strap on the small hook below the
batteries.
•
Close the battery cover.
1.7 Transportation
ATTENTION!
The unit can be damaged if it is not transported
correctly!
To avoid transport damage, the device should
always be transported in the bag provided.
1.8 Disposal
Electronic equipment does not belong in normal
domestic waste and must be disposed of in ac-
cordance with the applicable regulations.
Defective batteries are considered hazardous
waste and must be taken to the designated collec-
tion points for disposal.

General information
7
1.9 Manufacturer address
Wöhler Technik GmbH
Wöhler-Platz 1
33181 Bad Wünnenberg
Tel.: [phone]
E-Mail: [e-mail]

Specification
8
2 Specification
2.1 Measured values
Differential pressure measurement
(temperature-compensated piezo
bridge)
Description
Reading
Preset unit
hPa
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
Usability measurement (in connec-
tion with the Wöhler Smart Con-
nect App)
Description
Reading
Measuring range
0 to 300,0 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
9
External temperature measure-
ment
(with a temperature clamp probe or
surface temperature sensor)
Description
Reading
Measuring range
-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
10
2.2 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
Usability meas-
urement
Pressure drop
(in connection
with the Wöhler
Smart Connect
App)
Gas leakage rate from pres-
sure drop (classe D):
0,0 to 300,0 l/h via pressure
drop
in accordance with DVGW-
TRGI worksheet G 600 in l/h.

Specification
11
2.3 Logger function
Description
Reading
Scope
9999 measurements,
each with measured
values for pressure and
humidity, as well as
two measured values
for temperature (with
external sensors con-
nected) with freely
selectable scanning
intervals ranging from
1 second to 24 h can
be saved in the inter-
nal memory.
Bluetooth data trans-
mission
Online data, perma-
nent, already during
registration
Selectable scanning
intervals
Intervals can be freely
chosen in the range
from 1 second to 24 h

Specification
12
2.4 Technical data
Description
Reading
Power supply
2 batteries 1,5 V, AA LR6
Power supply
(optional)
Lithium-Polymer battery 3,7 V, 700 mAh,
charged via USB
Battery charging cyc-
les
(optional)
After 500 charging cycles at least 70% of the battery's ca-
pacity should still be available.
Charging time battery
(optional)
4 h
Battery lifetime
(optional)
38 h
Automatic shutdown
After 1 hour (can be deactivated in the settings)
Storage temperature
-20 °C to + 50 °C
Operating temperature
+5 °C to 40 °C to ensure accuracy is within the specified
limits
Weight
140 g
Dimensions
170 x 47 x 29 mm
Data exchange
Bluetooth to the Wöhler Smart Connect App
Bluetooth to the Wöhler M 603
Infrared to the printer

Structure and functions
13
3 Structure and functions
Fig 3: Wöhler SC 602 Manometer
Operating but-
ton (1)
Keystroke
Functions
Long
on/off
Measuring mode
Short
Zero pressure
Double click
Printout of measured values on thermal
printer
Setting mode
Short
Make selection
Double click
Confirm selection
4
3
6
8 (back side)
7
5
1
2
9

Structure and functions
14
Number
Function
1
Operating button
2
USB-C- charging connection (optional, only for battery
operation)
3
Display
4
colorful adhesive dot for device marking
5Pressure connection
(right)
Main connection for differential pressure measurement
(positive)
6 Pressure connection
(left)
Reference connection for differential pressure meas-
urement
(negative)
7
Plug-in connection for external temperature sensor or
clamp NiCr-Ni (type K)
8
Battery compartment on the back of the device
9
IR Thermal printer interface

Switch on
15
4 Switch on
WARNING!
Due to the compressibility of gases, the accident
prevention regulations "Working on gas installa-
tions" and the rules and regulations "Technical
rules for gas installations DVGW-TRGI" must be
o
bserved for all pressure tests with air or inert gas
for safety reasons.
ATTENTION!
Vor jedem Gebrauch muss zunächst visuell der
ordnungsgemäße Funktionszustand des Gerätes
geprüft werden. Soll eine Gebrauchsfähigkeitsprü-
fung an einer Gasleitung erfolgen, muss vorher
ein Dichtheitstest gemäß Kapitel Fehler! Ver-
weisquelle konnte nicht gefunden werden.
durchgeführt werden.
Fig. 4: Operating button
•Switch on the device: Press and hold the
operating button for 2 sec.
•
Switching off the device: Press and hold the
operating button for 3 sec.
After switching on, the overall display lights up
briefly and then the start screen lights up for ap-
prox. 7 seconds
.
During this time, the device performs a pressure
zeroing
.
ATTENTION!
During zeroing, no hose may be connected or no
differential pressure applied, as the device stabi-
lizes and determines its zero point.
The measuring display appears afterwards
.

Switch on
16
4.1 Display indication
In the measuring mode, the currently measured
pressure value is
shown in the main display and the
temperature or humidity value is shown below it
.
Upper line
:
•wireless connection via bluethooth
- flashing: ready to connect
- permanent: connection established, in this
case a Bluethooth icon also appears
•Battery level indicator:
- 3 dashes: high battery voltage
- Flashing: very low battery voltage
Middle line
:
•Current measured pressure
- Units selectable via Wöhler Smart Connect
App
Bottom
line:
•internally measured temperature or
•externally measured temperature (with con-
nected temperature sensor)
•relative humidity
- Selection via Wöhler Smart Connect App
Fig. 5: Wöhler SC 602 display

Switch on
17
Fig. 6: Higher value measured via posi-
tive pressure port
The differential pressure is always shown in the
display without a sign.
Instead, there is a p
lus sign (+) under the pressure
port through which the higher value is measured and
a minus sign (
-) under the pressure port with the
lower value.
NOTE!
It is recommended to connect the gauge or vacu-
um to be measured to the right port and leave the
left port open as a reference port.
Fig. 7: Higher value measured via nega-
tive pressure port

Make settings directly on the device
18
5 Make settings di-
rectly on the device
All settings on the Wöhler SC 602 can be made
quickly and conveniently via the Wöhler Smart
Connect app. However, it is possible to make
some settings on the device via the operating
button. To do this, proceed as follows:
•
Immediately after switching on, as soon as the
battery symbol has appeared in the display
and before the measured value display ap-
pears, double-click with the operating button.
You enter the settings mode.
5.1 Pressure unit selection
The display shows ”Press unit“.
•
To select the pressure unit, press the operat-
ing key briefly.
The pressure units mbar, bar, inWC, psi, mmH2O,
mH2O, in Hg, Pa, hPa, kPa und MPa appear one
after the other.
•
Apply the desired unit with a double click.
5.2 Print resolution selec-
tion
The display shows ”reso“ (resolution).
You can now set the displayed resolution for print-
ing. The resolution refers to the previously select-
ed print unit. There are 3 different resolutions to
choose from.
•
Press the operating key briefly to select the
desired resolution.
•
Confirm your selection with a double click.
5.3 Selection of the tem-
perature unit
The display shows “Temp. unit“.
You can now select the temperature unit °C or °F.
•
Press the operating button to switch between
°C and °F.
•
Confirm your selection with a double click.
5.4 Switch display illumina-
tion on/off
The display shows ”Light on“.
•
Press the operating button briefly to switch the
backlight off or on again.
•
Confirm your selection with a double click

Make settings directly on the device
19
5.5 Deactivate automatic
shutdown function
The display shows “Auto Off“.
The device switches off automatically after one
hour if no button has been pressed. This auto-off
function can be deactivated at this point.
•
Press the operating button briefly to switch
between "Auto Off" (automatic switch-off acti-
vated) and "Ever ON" (automatic switch-off
deactivated).
•
Confirm your selection with a double click.
Afterwards, the display changes back to the start
screen for a few seconds and then to the measur-
ing mode.

Make settings directly on the device
20
5.6 Probes and connection components
Fig
. 8: Wöhler SC 602 with ambient air
temperature sensor
Connection temperature measurement:
For external temperature measurement any ther-
mocouple type K can be connected , e.g. a tem-
perature clamp or a temperature probe.
•
Insert the temperature plug into the tempera-
ture socket on the underside of the device (Fig.
3, part 6).
Fig
. 9: Connection fittings for pumping
up via an air pump
Connection fittings for load, leak and usability testing
with
Wöhler Gas Line Sealing Set and High Pres-
sure Plug
.