BD Sensors AX16-DL 01 User manual

BD-Sensors-Str.1; 95199 Thierstein, Germany
Phone: [phone] | www.bdsensors.de
© 2018 BD|SENSORS GmbH – All rights reserved
Operating Manual
Digital Gauge AX16-DL 01
READ THOROUGHLY BE FORE USING THE DEVICE
KEEP FOR FUTURE REFERENCE
ID: BA_DL01_EX_E | Version: 12.2018.0
1. General and safety-related information on
this operating manual
This operating manual enables safe and proper handling of the
product, and forms part of the device. It should be kept near the
place of use, accessible for staff members at any time.
All persons entrusted with the mounting, installation, putting into
service, operation, maintenance, removal from service, and
disposal of the device must have read and understood the
operating manual and in particular the safety-related information.
The following documents are an important part of the
operating manual:
- Data sheet
- Type-examination certificate
For specific data on the individual device, please refer to the
respective data sheet.
Download this by accessing www.bdsensors.com or request it
by e-mail or phone: [e-mail]
phone: [phone]
The explosion-proof versions of our products are variants of the
standard products.
In addition, the applicable accident prevention regulations, safety
requirements, and country-specific installation standards as well
as the accepted engineering standards must be observed.
For the installation, maintenance and cleaning of the device, the
relevant regulations and provisions on explosion protection (VDE
0160, VDE 0165 and/or EN 60079-14) as well as the accident
prevention regulations must absolutely be observed. The device
was designed by applying the following standards:
EN 60079-0:2018
EN 60079-11:2012
1.1 Symbols used
Warning word
- Type and source of danger
- Measures to avoid the danger
Warning word Meaning
DANGER
- Imminent danger!
- Non-compliance will result in
death or serious injury.
WARNING
- Possible danger!
- Non-compliance may result in
death or serious injury.
CAUTION
- Hazardous situation!
- Non-compliance may result in
minor or moderate injury.
NOTE - draws attention to a possibly hazardous situation that
may result in property damage in case of non-compliance.
Precondition of an action
1.2 Staff qualification
Qualified persons are persons that are familiar with the
mounting, installation, putting into service, operation,
maintenance, removal from service, and disposal of the product
and have the appropriate qualification for their activity.
This includes persons that meet at least one of the following
three requirements:
- They know the safety concepts of metrology and
automation technology and are familiar therewith as
project staff.
- They are operating staff of the measuring and
automation systems and have been instructed in the
handling of the systems. They are familiar with the
operation of the devices and technologies described in
this documentation.
- They are operating staff of the measuring and
automation systems and have been instructed in the
handling of the systems. They are familiar with the
operation of the devices and technologies described in
this documentation.
All work with this product must be carried out by qualified
persons!
1.3 Intended use
The battery powered digital gauge has been designed for
extremely high demands in the sector of calibration and test
technology. It can be easily and quickly installed in situ.
This operating manual applies to devices with explosion
protection approval and is intended for the use in IS-areas.
A device has an explosion-protection approval if this was
specified in the purchase order and confirmed in our order
acknowledgement. In addition, the manufacturing label includes
a sign.
The user must check whether the device is suited for the
selected use. In case of doubt, please contact our sales
department: [email protected] | phone: [phone]
BD|SENSORS assumes no liability for any wrong selection and
the consequences thereof!
Permissible media are gases or liquids, which are compatible
with the media wetted parts described in the data sheet. In
addition, it has to be ensured, that this medium is compatible
with the media wetted parts.
The technical data listed in the current data sheet are engaging
and must absolutely be complied with. If the data sheet is not
available, please order or download it from our homepage:
http://www.bdsensors.com
WARNING
Danger through incorrect use
- In order to avoid accidents, use the
device only in accordance with its
intended use.
1.4 Limitation of liability and warranty
Failure to observe the instructions or technical regulations,
improper use and use not as intended, and alteration of or
damage to the device will result in the forfeiture of warranty and
liability claims.
1.5 Safe handling
NOTE - Treat the device with care both in the packed and
unpacked condition!
NOTE - The device must not be altered or modified in any
way!
NOTE - Do not throw or drop the device!
NOTE - Excessive dust accumulation (over 5 mm) and
complete coverage with dust must be prevented!
NOTE - The device is state-of-the-art and is operationally
reliable. Residual hazards may originate from the device if it is
used or operated improperly!
1.6 Safety technical maximum values
EU-type examination certificate: IBExU12ATEX 1108 X
Device type: AX16-DL01
Identification:
Standard variant for zone 1: II 2G Ex ia IIB T4 Gb
With conductive front foil for zone 0: II 1G Ex ia IIC T4 Ga
Ambient temperature range:
Display module: -10 ... 55 °C
Transmitter module: -20 … 70 °C (with 1G up to +60 °C)
Power: 3x 1.5 V / AA: DURACELL Plus Power batteries
1.7 Scope of delivery
Check that all parts listed in the scope of delivery are included
free of damage, and have been delivered according to your
purchase order:
- digital gauge (display / pressure sensor module)
- this operating manual
- accessories (option)
1.8 UL-approval (for devices with UL-marking)
The UL approval was effected by applying the US standards,
which also conform to the applicable Canadian standards on
safety.
2. Product identification
The device can be identified by its manufacturing label. It
provides the most important data. By the ordering code the
product can be clearly identified.
Fig. 1 Manufacturing labels
NOTE - The manufacturing labels must not be removed!
3. Mounting
3.1 Mounting and safety instructions
DANGER
Danger of death from explosion,
airborne parts, leaking fluid, electric
shock
- Always mount the device (pressure
transmitter module) in a depressurized
condition and apart from the display!
- Do not install or open the device
(e.g. for changing batteries) while
there is a risk of explosion.
Furthermore, no communication and
connection of the cables is allowed.
WARNING
Danger of death from improper
installation
- This device may only be installed by
qualified technical personnel who has
read and understood the operating
manual!
-
Do not use the display to tighten or
solve to the mechanical connection of
the pressure transmitter module!
NOTE - Operation of the display AX16-DL01 with the EC-Type
Examination certificate IBExU12ATEX1108 X is permitted only
in combination with the accompanying pressure transmitter
(pressure sensor module) with the EC-Type Examination
certificate IBExU10ATEX 1026 U!
NOTE - If both equipments have not been used in the
scheduled combination (display AX16-DL01 / pressure
transmitter (pressure sensor module) with certificate IBExU10
ATEX 1026 U), then the complete system has to be put
immediately out of operation!
A potentially damage of one or both devices could have been
occurred! The device(s) consequently lose the IS-certification
when using not for intended purpose!
NOTE -
Handle the unprotected diaphragm very carefully - it is
very sensitive and may be easily damaged.
NOTE - To avoid damaging the diaphragm, remove packaging
and protective cap only directly before starting up the device. A
delivered protective cap must be stored!
NOTE - Place the protective cap on the pressure port again
immediately after disassembling.
NOTE - Do not use any force when installing the device to
prevent damage of the device and the plant!
NOTE - Take note that no inadmissibly high mechanical
stresses occur at the pressure port as a result of the installation,
since this may cause a shifting of the characteristic curve or to
the demage.
NOTE - In hydraulic systems, position the device in such a
way that the pressure port points upward (venting).
NOTE - Provide a cooling line when using the device in steam
lines.
NOTE - If the device is installed with the pressure port pointing
upwards, ensure that no liquid drains off on the device. This could
result in humidity and dirt blocking the gauge reference in the
housing, and could lead to malfunctions. If necessary, dust and
dirt must be removed from the edge of the screwed joint of the
electrical connection.
NOTE - The specified tightening torques must not be
exceeded!
NOTES - for mounting outdoors or in a moist
environment:
- Please note that your application does not show a dew point,
which causes condensation and can damage the pressure
transmitter. There are specially protected pressure
transmitters for these operating conditions. Please contact us
in such case.
- Connect the device electrically straightaway after mounting or
prevent moisture penetration, e.g. by a suitable protective
cap. (The protection rating specified on the data sheet applies
to the connected device.)
- Select the mounting position such that splashed and
condensed water can drain off. Stationary liquid on sealing
surfaces must be excluded!
- Mount the device such that it is protected from direct solar
radiation. In the most unfavourable case, direct solar radiation
leads to the exceeding of the permissible operating
temperature. This must be excluded if the device is used in
any explosion-hazardous area!
- A device with gauge reference in the housing (small hole next
to the electrical connection) must be mounted such that the
gauge reference is protected against dirt and humidity. If the
device is exposed to liquid admission, the gauge reference
will be blocked, and the equalization of air pressure will be
prevented. In this condition, a precise measurement is
impossible and damage to the device may occur.
3.2 Mounting steps for connections according
to DIN 3852
NOTE - Do not use any additional sealing material such as
yarn, hemp or Teflon tape!
The O-ring is undamaged and seated in the designated
groove.
 The sealing face of the mating component has a flawless
surface. (R
Z
3.2)
1 Screw the device into the mating thread by hand.
2 Devices with a wrench flat must be tightened using a
suitable open-end wrench.
G1/4": approx. 5 Nm; G1/2": approx. 10 Nm;
3.3 Mounting steps for connections according
to EN 837
A suitable seal for the measured fluid and the pressure to
be measured is available. (e.g. a copper seal)
The sealing face of the mating component has a flawless
surface. (R
Z
6.3)
1 Screw the device into the mating thread by hand.
2 Then tighten it using an open-end wrench:
G1/4": approx. 20 Nm; G1/2": approx. 50 Nm
3.4 Mounting steps for NPT connections
Suitable fluid-compatible sealing material, e.g. PTFE tape,
is available.
1 Screw the device into the mating thread by hand
2 Then tighten it using an open-end wrench:
1/4" NPT: approx. 30 Nm; 1/2" NPT: approx. 70 Nm
4. Connecting display / pressure sensor module
Fig. 2 Lock against protection
Connect display with pressure transmitter module as follows:
-
bring together carefully the display with pressure transmitter
module
- press the display sturdy pressure transmitter module to this
engages
NOTE - Before disconnecting display and pressure sensor
module make sure that the device is switched off.
NOTE -
While the data logger is active, display and pressure
sensor module must not be disconnected!
5. Supply / changing the batteries
DANGER
Danger of death from explosion
- Do not open the housing (e.g. for
changing batteries) while an
explosion hazard exists!
Before initial start-up the insulation foil has to be removed.
Carry out steps 1 - 3 and 5 in this regard.
As soon as in the display the announcement of "battery" is
shown, a battery change is required. Follow steps 1, 2, 4,
and 5 in this regard:
1 unscrew three fixing screws with a suitable screwdriver
2 take the battery case cap
3 remove the insulation foil before initial start-up
4 exchange the batteries (3 x 1.5 V AA
5 lock the device after that properly
NOTE - An incorrect usage may cause a leak out of batteries
and so a damage the device!
NOTE - Use only the following batteries that have Ex and UL
approvals: 1.5V / AA DURACELL Plus Power Battery
NOTE - Never combine batteries of different types or old
with new ones!
NOTE - Make sure that the batteries are connected
correctly with the corresponding contacts in the battery tray.
NOTE - Never try to charge batteries, demount them, or
short-circuit them.
NOTE - Keep the batteries away from heat and unshielded
flame.
Fig. 3 Battery case and communication interface
6. Commissioning
DANGER
Danger of death from explosion
- Operate the device only within the
specification! (according to data sheet
and EC-type-examination certificate)
- Do not install or open the device
(e.g. for changing batteries) while
there is a risk of explosion.
Furthermore, no communication and
connection of the cables is allowed.
The device has been installed properly.
The device does not have any visible defect.
The insulation foil was removed from the battery case
6.1 Data logger
The battery powered digital gauge disposes of an integrated
data logger. The measuring values stored away in the device
can be selected above the communication interface by means of
software BD|LOG (optionally included in delivery). Free version
BD|LOG software is available via our homepage:
https://www.bdsensors.com
6.2
PC-connection
Connect device with a computer as follows:
-
Unscrew the protective screwing of the communication
interface with a suitable slit screwdriver.
-
Connect the handle plug of the connecting cable (included in
delivery) with the interface socket of the device. Connect the
USB plug with a free USB connection on the computer.
-
Install COM driver and data logger software BD|LOG.
-
After the use, disconnect the connection and lock the
protection screwing again properly.
7. Operation
7.1 Operating- and display elements (display)
Fig.4 Display and operating foil
The display of the measuring value as well as configuring the
single parameters occurs menu-steered about a LC display
capable of graphic arts. The single functions are regulated on
the basis of three-front-sided arranged push buttons.
The menu system is closed, thereby one can "browse" forward
as well as backward by the single setting menus to reach to the
desired setting point.
7.2 Structure of the menu system
battery case
battery case cap
fixing screw
connecting cable comm. -
interface
insulation foil
protection screwing
battery
manufacturing label for display
manufacturing label for pressure sensor module
display
pressure
sensor
module
lock against
protection
barograph/%
timer / battery / log
pressure
time
temperature
left button menu - button right button
zero
data logger

8. Maintenance
DANGER
Danger of death from airborne parts,
leaking fluids, electric shock
- Always service the device in a
depressurized and de-energized
condition!
WARNING
Danger of injury from aggressive fluids
or pollutants
- Depending on the measured medium,
this may constitute a danger to the
operator.
- Wear suitable protective clothing
e.g. gloves, safety goggles.
If necessary, clean the housing of the device using a moist cloth
and a non-aggressive cleaning solution.
The cleaning medium for the media wetted parts (pressure port /
diaphragm / seal) may be gases or liquids which are compatible
with the selected materials. Also observe the permissible
temperature range according to the data sheet.
Deposits or contamination may occur on the diaphragm /
pressure port in case of certain media. Depending on the quality
of the process, suitable maintenance intervals must be specified
by the operator. As part of this, regular checks must be carried
out regarding corrosion, damage to the diaphragm and signal
shift.
If the diaphragm is calcified, it is recommended to send the
device to BD SENSORS for decalcification.
NOTE - Wrong cleaning or improper touch may cause an
irreparable damage on the diaphragm. Therefore, never use
pointed objects or pressured air for cleaning the diaphragm.
9. Removal from Service
DANGER
Danger of death from airborne parts,
leaking fluids, electric shock
- Disassemble the device in a
depressurized and switched-off
condition!
WARNING
Danger of injury from aggressive
media or pollutants
- Depending on the measured medium,
this may constitute a danger to the
operator.
- Wear suitable protective clothing
e.g. gloves, goggles.
NOTE - After dismounting, mechanical connections must be
fitted with protective caps.
10. Service/Repair
Information on service / repair:
- www.bdsensors.com
- [email protected]
- Service phone: [phone]
10.1 Recalibration
During the life-time of a transmitter, the value of offset and span
may shift. As a consequence, a deviating signal value in
reference to the nominal pressure range starting point or end
point may be transmitted. If one of these two phenomena occur
after prolonged use, a recalibration is recommended to ensure
furthermore high accuracy.
10.2 Return
WARNING
Danger of injury from aggressive
media or pollutants
- Depending on the measured medium,
this may constitute a danger to the
operator.
- Wear suitable protective clothing
e.g. gloves, goggles.
Before every return of your device, whether for recalibration,
decalcification, modifications or repair, it has to be cleaned
carefully and packed shatter-proofed. You have to enclose a
notice of return with detailed defect description when sending
the device. If your device came in contact with harmful
substances, a declaration of decontamination is additionally
required.
Appropriate forms can be downloaded from our homepage.
Download these by accessing www.bdsensors.com or request
them:
[email protected] | phone: [phone] / 98 11 0
In case of doubt regarding the fluid used, devices without a
declaration of decontamination will only be examined after
receipt of an appropriate declaration!
11. Disposal
WARNING
Danger of injury from aggressive
media or pollutants
- Depending on the measured medium,
this may constitute a danger to the
operator.
- Wear suitable protective clothing
e.g. gloves, goggles.
The device must be disposed of according to the
European Directive 2012/19/EU (waste electrical
and electronic equipment). Waste equipment must
not be disposed of in household waste!
NOTE - Dispose of the device properly!
12. Warranty Terms
The warranty terms are subject to the legal warranty period of 24
months, valid from the date of delivery. If the device is used
improperly, modified or damaged, we will rule out any warranty
claim. A damaged diaphragm will not be accepted as a warranty
case. Likewise, there shall be no entitlement to services or parts
provided under warranty if the defects have arisen due to normal
wear and tear.
13. EU Declaration of conformity / CE
The delivered device fulfils all legal requirements. The applied
directives, harmonised standards and documents are listed in the
EC declaration of conformity, which is available online at:
http://www.bdsensors.com.
Additionally, the operational safety is confirmed by the CE sign on
the manufacturing label.
7.3 Menu description
Switching on Switching on without status message, with "left button" and "right button" key possible.
Switching on with status message, only possible with button "Menu key" (middle button).
Status message (appears in the display for approx. 2 seconds):
- DL01 Status
- Memory usage: in percent
- TAG: measuring point designation in text form
- Battery: status of the battery charge
- Firmware: installed version
Menu 1/13
Access Password: **** (a four-digit, freely combinable statement consisting of numbers, letters and special characters) - Protection [Off]: unrestricted operation
- Protection [On]: operation only possible after password input
(Select menu item "Password" with "Edit" →Press "<<" or ">>" →Set value →continue with "Next". Set password
and remember! →Press "Next" to "Protection" sub-item →Press "<<" or ">>" →Activate protection [On] or
deactivate protection [Select] →confirm with "Next" and continue to menu bar.)
NOTE - No connection to the evaluation software BD│LOG, if password is active!
NOTE - If you have forgotten your password, contact the manufacturer!
Menu 2/13
Min/Max Values Display of min / max values Pmin - Minimum pressure display: The minimum pressure applied during measuring is shown in the display.
Pmax - Maximum pressure display: The maximum pressure applied during measuring is shown in the display.
Tmin - Minimum temperature display: The minimum temperature during measuring is shown in the display.
Tmax - Maximum temperature display: The maximum pressure applied during measuring is shown in the display.
Possible options: reset value [Reset ?, Sure?]
(Resetting of a value: select the menu point with "Edit" →button ">>" operate. There appears the question
"Reset?" →once more operate the button ">>". It seems "Sure?" additional confirmation whether the value should
be put back →repeated confirming with the button ">>" takes over topically adjoining pressure as a minimum
value.)
Menu 3/13
Data Logger
Configuration
Data logger: the following settings are possible: deactivate data logger [Off]. Activation only with the button [Start]
and deactivation only with the button [Stop] possible.
("D" appears in the display when the datalogger is activated and disappears when the datalogger is deactivated).
After deactivation, the display shows OK (if no leakage has been detected) or nOK (if leakage has been detected).
linearly [Linear] (value admission to the counter level 600798 is reached) is displayed after starting the data logger
(Start button). After deactivating the datalogger [Off] is displayed
Interval: second [1-99 sec.]; minute [1-99 min]; hour [1-99 h]; or day [1-99 days], time of day has to be set additional
l
milliseconds [20 msec.], only possible if the sampling rate is set to 50 / sec. in menu 4/13 (measuring performance).
Time of day: Measured value recording: at what time the value should be recorded (only effective for the interval
setting "day").
TAG: Measuring point inscription, factory set BD│Sensors. The setting can be changed by the user.
NOTE - While the data logger is active, the display and pressure sensor module may not be disconnected!
Menu 4/13
Measuring Perf. Sample rate: Possible settings [1 / sec.], [2 / sec.] or [50 / sec.] only if the interval is set to [20 msec.] in menu 3/13 (Data Logger).
Damping: Damping can be set in one-second increments between [1 sec.] and [10 sec.],
or disabled by selecting [Off].
Menu 5/13
Quick access Button configuration: Left button / Right button Left / Right button: configuration of functions: [Min], [Max], [Light], [Zero], [Reset], [Single], [Off]
Description of the functions:
- [Min] / [Max] minimum / maximum pressure value is shown in the display
- [Light] The backlight will turn on only when the illumination time in the 8/13 menu is set to 1-10 s.
- [Zero] the zero point is set automatically, the display shows "Z"
- [Reset] the set zero point is reset, goes out
- [Single] the measured values are recorded individually after pressing the button
- [Off] switches off the display (standby), provided the data logger is deactivated.
Menu 6/13
Units
Adjustment of pressure unit
adjustable units: [bar], [PSI], [mbar], [mH2O], [inHg], [cmHg], [mmHg], [hPa], [kPa], [MPa], [kg/cm2], [ inH2O],
[mmH2O] or [User] (the user-defined unit [User] can only be programmed using the software BD | LOG), all
pressure-related parameters are converted
Setting the decimal places
settable decimal places: standard [Std], one decimal place [+1] or two decimal places [+2]
Setting the temperature unit
adjustable units: degrees Celsius [°C], degrees Fahrenheit [°F] or Kelvin [K] set (factory setting [°C])
Menu 7/13
Settings 1 Setting the date, time and language Adjustable options: The date in the format [T.M.JJJJ], the time in the format [hh: mm] and the language [German]
or [English].
Menu 8/13
Settings 2
Setting the switch-off time, the lighting and the brightness
Off time: Setting the automatic switch-off in minutes. The automatic shut-off can be configured in increments of [1
min], [2 min], [3 min], [4 min] or [5 min] (the timer is activated 30 sec. before switching it off) or disabled by the [Off]
option. After deactivation, the precision digital pressure gauge is in continuous operation.
Illumination: the illumination duration can be set in one-second increments between [1 s] and [10 s] and in ten-
second increments between [20 s] and [120 s], or disabled by selecting [Off] and enabling [On]. Note: For
continuous lighting [On] increased consumption of the battery charge.
Brightness: The brightness can be adjusted in 10% increments between [0%] and [100%].
Menu 9/13
Sensor Data
Overview of sensor data (pressure sensor module)
[SN:] Serial number (ten-digit number)
[Lower:] Start of measuring range (value and unit)
[Upper:] Measuring range end (value and unit)
[Date:] Date of manufacture (dd.mm.yyyy)
The values are set by the factory and cannot be changed.
Automatic detection after connecting the sensor to the display
Menu 10/13
Device Info Overview of device information (display) [SN:] Serial number
[Cap:] Data logger capacity (occupied range 0-600798 / maximum acceptance 600798)
[Firmware:] The installed firmware version is displayed.
[Production:] Date of manufacture (TT.MM.JJJJ)
The values are set by the factory and cannot be changed. The recorded value in the data logger can be reset.
(Reset counter reading: menu point [Cap:] with "Edit" select →button "<<" or ">>" press. There appears the
question "Reset?" →once more operate the button "<<" or ">>". It seems "Sure?" additional confirmation whether
the value should be reset →repeated confirming with the button "<<" or ">>" reset the grasped measuring values.
Display announcement "Counter: 0/600798")
Menu 11/13
Leakage 1 Leakage test 1 Mode: off / linear (when data logger is active)
Number of values: setting the number of measured values [1 ... 600798 (assuming memory is empty)]
Duration 0T/00:10:00: display duration of the recording
Format: Real (current measured values), difference (deviation from nominal pressure range)
Menu 12/13
Leakage 2 Leakage test 2 Low L.: lower measuring limit
Upp L.: upper measuring limit
Measuring limits for the leakage test. Adjustment within the nominal pressure range.
Menu 13/13
Service Setting the service options Device restart: [No] or [Yes] Switching off and switching on the device is carried out automatically.
Required before firmware upgrade.
Presets: Reset [No] or [Yes] to factory defaults
Error Display "No sensor": Display and pressure sensor modules are disconnected.
Indication "Inappropriate sensor": Sensor is not suitable for the sampling rate 50 / s and the interval of 20 ms.
Firmware update Download current firmware (https://www.bdsensors.de), switch on the device, connect the display to the computer
(see 5.2), start the firmware update tool. Device (display) restart (automatic detection), select update file with
“Select File”, press Start Update button and execute update.
NOTE - the update may not be interrupted!
- Left button: is a function button and can be configured in menu 5. Off, Min, Max, Light, Zero, Reset or Single function can
be assigned to the button. The configured function is active in display mode. Hold the button for about 2
seconds to activate the preset function. In operating mode, move backwards in the menu system "<<" or
reduce the setting value.
- Right button: is a function key and can be configured in menu 5. Off, Min, Max, Light, Zero, Reset or Single functions can be
assigned to the key. Hold the button for about 2 seconds to activate the preset function. In operating mode, move
forward in the menu system ">>" or increase the setting.
- Menu-button: pressing this "Menu" button will enter the operating mode; It also serves to select the individual menu items "Edit"
or to confirm the set values "Next". When pressing the button for approx. 4 seconds, the operating mode is exited.
To configure the individual menu items, the desired menu item must be set with the help of the left key "<<" or the right key ">>".
Then confirm this with the menu button "Edit". Menu item is highlighted and configuration can begin.
To save a set value the menu key "Next" must be pressed. To exit the menu, press the menu button for approx. 4 seconds. The
operating mode is also left automatically after approx. 1 min.
Changes are only effective after pressing the menu button "Next" and after leaving the menu item. When leaving the entire
menu system, the set parameters are checked again in relation to each other and in relation to the characteristics of the
device. When configuring the unit, the measuring range is converted into the new unit only after leaving the menu system.
Depending on the pressure range, not all units may be used.