SIKA MH3111 User manual

H61.0.12.6C-03
User’s Manual
Handheld Pressure-Meter
MH3111
as of Version 6.4
for MSD or MXD – Pressure Sensors
SIKA Dr.Siebert & Kühn GmbH & Co. KG ·• Struthweg 7–9 • 34260 Kaufungen • Germany • [phone] • [phone] • i[email protected] • www.SIKA.net

H61.0.12.6C-03 User’s Manual MH3111 page 2 of 8
CONTENTS
1GENERAL................................................................................................................................................ 3
1.1 SAFETY REQUIREMENTS....................................................................................................................... 3
1.2 OPERATION AND MAINTAINANCE ADVICE............................................................................................... 3
1.3 CONNECTIONS..................................................................................................................................... 4
1.4 DISPLAY.............................................................................................................................................. 4
1.5 BASIC OPERATION ............................................................................................................................... 4
2 CONFIGURATION................................................................................................................................... 5
2.1 UNIT:CHOICE OF THE DISPLAY UNIT .................................................................................................... 5
2.2 SEA LEVEL CORRECTION FOR ABSOLUTE PRESSURE SENSORS ............................................................. 5
2.3 P.OFF: AUTO POWER OFF TIME........................................................................................................... 5
2.4 ADR:BASE ADDRESS OF INTERFACE..................................................................................................... 5
2.5 OFFS: ADJUSTUNG SENSOR ZERO DISPLACEMENT............................................................................... 5
2.6 SCAL: ADJUSTUNG SENSOR SCALE ..................................................................................................... 5
3 MEASURING OF WATER LEVEL – DISPLAY UNIT [M]......................................................................... 6
4 THE SERIAL INTERFACE....................................................................................................................... 6
5 PRESSURE CONNECTION TO THE SENSORS..................................................................................... 7
6 ERROR AND SYSTEM MESSAGES ....................................................................................................... 7
7 CALIBRATION SERVICES...................................................................................................................... 7
8 SPECIFICATION...................................................................................................................................... 8
9 DISPOSAL NOTES.................................................................................................................................. 8
SIKA Dr.Siebert & Kühn GmbH & Co. KG ·• Struthweg 7–9 • 34260 Kaufungen • Germany • [phone] • [phone] • i[email protected] • www.SIKA.net

H61.0.12.6C-03 User’s Manual MH3111 page 3 of 8
1 General
1.1 Safety Requirements
This device has been designed and tested in accordance with the safety regulations for electronic devices.
However, its trouble-free operation and reliability cannot be guaranteed unless the standard safety measures
and special safety advises given in this manual will be adhered to when using the device.
1. Trouble-free operation and reliability of the device can only be guaranteed if the device is not subjected
to any other climatic conditions than those stated under "Specification".
2. Device and sensors have to be handled with care (don’t throw, hit, etc.). Protect plugs and sockets from
soiling.
3. If the device is transported from a cold to a warm environment condensation may cause in a failure of the
function. In such a case make sure the device temperature has adjusted to the ambient temperature
before trying a new start-up.
4. If device is to be connected to other devices (e.g. via serial interface) the circuitry has to be designed
most carefully. Internal connection in third party devices (e.g. connection GND and earth) may result in
not-permissible voltages impairing or destroying the device or another device connected.
Warning: If device is operated with a defective mains power supply (e.g. short circuit from mains voltage
to output voltage) this may result in hazardous voltages at the device (e.g. at sensor socket or interface).
5. If there is a risk whatsoever involved in running it, the device has to be switched off immediately and to
be marked accordingly to avoid re-starting.
Operator safety may be a risk if:
- there is visible damage to the device
- the device is not working as specified
- the device has been stored under unsuitable conditions for a longer period of time.
In case of doubt, please return device to manufacturer for repair or maintenance.
6. Warning: Do not use these product as safety or emergency stop device, or in any other application
where failure of the product could result in personal injury or material damage.
Failure to comply with these instructions could result in death or serious injury and material damage.
1.2 Operation And Maintenance Advice
•Battery Operation
If ´bAt´ is shown in the secondary display the battery has been used up and needs to be replaced. The
device will, however, operate correctly for a certain amount of time. If ´bAt´ is shown in the upper display
the voltage is too low to operate the device; the battery has been completely used up.
Please note: The battery has to be taken out, when storing device above 50°C.
We recommend to take out battery if device is not used for a longer period of time!
The real time clock has to be set again after reconnect to the battery.
•Mains Operation With Power Supply
Warning: When using a power supply please note that operating voltage has to be 10.5 to 12 V DC.
Do not apply overvoltage!! Cheap 12V-power supplies often have excessive no-load voltage.
We, therefore, recommend using regulated voltage power supplies. Trouble-free operation is guaranteed
by our power supply GNG10/3000.
Prior to connecting the power supply to the mains make sure that the operating voltage stated at the
power supply is identical to the mains voltage.
Connecting/Changing Sensors
Do not use insuitable sensors. Connecting other devices/sensors as specificated may cause a damage to
the instrument and device/sensor! Switch off device before changing the sensor.
Connect sensors before switching on the device, otherwise the sensor may not be detected correctly.
When connecting the sensor the connector may not lock correctly. In such case take the plug not at the
casing but at the buckling protection at the end of the plug. If plug is entered correctly, it will slide in
smoothly. To disconnect sensors do not pull at the cable but at the plug (to open locking mechanism).
SIKA Dr.Siebert & Kühn GmbH & Co. KG ·• Struthweg 7–9 • 34260 Kaufungen • Germany • [phone] • [phone] • i[email protected] • www.SIKA.net

H61.0.12.6C-03 User’s Manual MH3111 page 4 of 8
1.3 Connections 1. Interface: Connect to optically isolated interface adapter
(accessory: GRS 3100, GRS3105 or USB3100)
2. Connection for pressure sensors of the MSD and MXD-family
3. The mains socket is located at the left side of the instrument
1.4 Display
Units: an arrow points to the
chosen measuring unit
SL: appears if sea-level-
correction is activated
Tara: appears if tara-function
is activated
main display: shows measuring value
secondary display: shows min-, max- or hold value
Logg: not used
1.5 Basic Operation
When switching on the device displayed "Corr", if a Sensor with activated offset or scale correction is
connected.
On-/Off-Switch Tara: Calling of tara function
min/max: Showing the min- resp. max-memory
Store/Quit: Calling of hold function
Set/Menu: Calling of configuration
Tare Function: By pressing ´Tara´ (key 3) the displays will be set to 0. All measurings from then on will be
displayed relatively to the set tare values. When the tare function is activated, the arrow
"Tara" appears in the display. To deactivate tare function press ´Tara´ for >2 seconds.
Please Note: Activating/deactivating tara clears the max- & min-memories.
Max Memory: Pressing ´max´ (key 2) shows the maximum of the measured value. Pressing it again
hides them. To clear the max. memory press key ´max´ for >2 seconds.
Min Memory: Pressing ´min´ (key 5) shows the minimum of the measured value. Pressing it again hides
them. To clear the min. memory press key ´min´ for >2 seconds.
Hold Function: By pressing ´Store/Quit´ (key 6) the last measuring value will be held in the secondary
display. Pressing it again hides it.
Zero-Point Adjustment: If there is no pressure or zero-pressure (absolute) applied to the pressure ports the
device will display 0. If there is a permanent deviation (and device is operated under
steady conditions), a permanent zero point adjustment can be carried out. To carry out the
adjustment press button 3 for approx. 5 seconds (Auto Null will be displayed shortly).
The adjustment is done via the OFFSET-value of the sensor (referring configuration
menu).
Please note: A zero-point adjustment can only be carried out if the difference between the
value on display is less than 500 digits!
To recall the manufacturer’s calibration press button 3 for approx. 15 seconds.
Note: If a zero-point adjustment was carried out, this will be signalled by the short
displaying of „Corr“ when switching on the device.
123
456
ON
OFF max Tara
Storemin
Set
Menu Quit
SIKA Dr.Siebert & Kühn GmbH & Co. KG ·• Struthweg 7–9 • 34260 Kaufungen • Germany • [phone] • [phone] • i[email protected] • www.SIKA.net

H61.0.12.6C-03 User’s Manual MH3111 page 5 of 8
2 Configuration
To change device settings, press Menu (key 4) for 2 seconds. This will call the configuration menu.
Pressing key Menu jumps between the parameters.
The parameters can be changed with 5(key 2) or 6(key 5).
Quit (key 6) finishes the configuration and returns to standard measuring operation.
2.1 Unit: Choice Of The Display Unit
Choose the desired display unit, the referring unit is displayed by means of a functional arrow in
the display. The selection is permanently stored in the sensor, therefore after reconnecting the
sensor the unit will instantly reappear. The choice depends on the used sensor.
2.2 Sea Level Correction For Absolute Pressure Sensors
The device displays the absolute pressure measured at the sensor. This is not necessarily the same like the
values given by weather stations! The weather stations‘ values are pressure at sea level. Usually the sensor
is placed above sea level and therefore, if the value at sea level(zero) is to be measured, the pressure loss
resulting from the actual level above zero has to be considered!
To correct activate the „Sea-Level-Function“:
Select „on“ in the menu „SL“ with 5(key 2) or 6(key 5).
Jump to the next parameter „Alti“ by pressing Menu (key 4).
Then enter the altitude above sea level of the sensor‘s location in meters and leave the
configuration by pressing Quit (key 6)
If the sea level correction is active this will be shown by the functional arrow „SL“ in the display, the device
now displays the absolute pressure at sea level (zero).
2.3 P.oFF: Auto Power Off Time
The device will be automatically switched off if no key is pressed/no interface communication
takes place for the time of the power off time.
The power off time can be set to values between 1 and 120 min. It can be completely
deactivated by setting the parameter to ‚P.oFF = oFF“.
2.4 Adr: Base Address of Interface
Up to 10 devices of the MH3xxx- handheld-family can be connected to a serial interface at once
(depending on interface converter, e.g. GRS3105: 5 devices). To get access to each device the
base addresses of the devices have to be different. For example choose 01 for the first, 11 for
the second device and so on.
MPaPabarmbar kPa
Tara AL LoggSLPSI
mbar
MPaPabarmbar kPa
Tara AL LoggSLPSI
MPaPabarmbar kPa
Tara AL LoggSLPSI
MPaPabarmbar kPa
Tara AL LoggSLPSI
MPaPabarmbar kPa
Tara AL LoggSLPSI
mbar
2.5 OFFS: Adjusting Sensor Zero Displacement
A zero displacement can be carried out for the measured value:
value displayed = value measured - offset
Standard setting: 'off' = 0.0°, i.e. no zero displacement will be carried out. Together with the scale correction
(see below) this factor is mainly used to compensate for sensor deviations. Input is in the display unit.
2.6 SCAL: Adjusting Sensor Scale
The scale of the measuring can be influenced by this setting (factor is in %):
displayed value = measured value * (1+Scal/100)
Standard setting: 'off' =0.000, i.e. value is not corrected. Together with the zero displacement (see above)
this factor is mainly used to compensate for sensor deviations.
SIKA Dr.Siebert & Kühn GmbH & Co. KG ·• Struthweg 7–9 • 34260 Kaufungen • Germany • [phone] • [phone] • i[email protected] • www.SIKA.net

H61.0.12.6C-03 User’s Manual MH3111 page 6 of 8
3 Measuring Of Water Level – Display Unit [m]
When using suitable waterproof pressure sensors the unit [m] for meters of water can be set in the menu
“Unit“. 10m of water are roughly 1 bar over pressure. Measurings can be made e.g. like described below :
•With one abs. pressure sensor (SL oFF!): Press ‚Tara‘ when sensor is at ambient air and then bring
sensor to the depth to be measured. The display shows now the depth in [m].
•With one rel pressure sensor: bring tube connection for lower press. in contact to ambient air by means
of a tube (no water contact!) and bring the sensor with its open press. connection for higher pressure to
water depth to be measured (display and is compensated for pressure changes in ambient air).
4 The Serial Interface
By means of the serial interface and a suitable electrically isolated interface adapter (GRS3100, GRS3105 or
USB3100) the device can be connected to a computer for data transfer. With the GRS3105 up to 5 devices
of the MH3xxx- series can be connected to one interface (see also manual of GRS3100, GRS3105 or
USB3100). To avoid transmission errors, there are several security checks implemented e.g. CRC.
The following standard software packages are available:
EBS9M: 9-channel software to display the measuring values
EASYCONTROL: Universal multi channel software (EASYBUS-, RS485-, or MH3000- operation
possible) for real-time recording and presentation of measuring data of one MH3xxx
device in theACCESS®-data base format
In case you want to develop your own software we offer a MH3000-development package including:
•a universally applicable Windows functions library ('MH3000.DLL') with documentation that can be used
by the most programming languages.
•Programming examples Visual Basic 4.0, Testpoint (Keithley Windows measuring software)
The device has 1 channel:
-Channel 1: current measuring value (base address)
Note: The measuring display range values read back from the interface are always in the
selected measurement unit (mbar, bar...)!
Supported functions:
Code Name/Function Code Name/Function
0 Read measurement value 200 Read min display range
3 Read system state 201 Read max display range
6 Read min value 202 Read display range - unit
7 Read max value 204 Read display range - decimal point
12 Read ID number 208 Read # of channels
176 Read min measuring range 214 Read Scale adjustment[%]
177 Read max measuring range 216 Read Offset adjustment
178 Read measuring range unit 222 Read power off time (Conf-P.oFF)
179 Read measuring range decimal point 223 Set power off time (Conf-P.oFF)
180 Read kind of measuring of sensor 240 Reset
199 Read kind of measuring of display 254 Program version
SIKA Dr.Siebert & Kühn GmbH & Co. KG ·• Struthweg 7–9 • 34260 Kaufungen • Germany • [phone] • [phone] • i[email protected] • www.SIKA.net

H61.0.12.6C-03 User’s Manual MH3111 page 7 of 8
5 Pressure Connection To The Sensors
The device is designed to be connected to the sensors of the MSD/MXD...-series without a new calibration being
necessary. Therefore a great variety of replaceable sensors of e.g. –1.999...2.500 mbar relative up to 0...400.0 bar
absolute pressure can be connected to the device.
Relative Pressure Sensors (types: MSD/MXD...MR, MSD/MXD...BR)
•For measurements of over- or under pressure:
Connect plastic tube with internal dia of 4 mm to pressure port "B". Port "A" will not be used!
Pressure sensors MSD 2,5 MR, MSD 25 MR and MSD 350 MR allow for measurements of under pressure up to the
entire over pressure measuring range by re-plugging the tube to pressure port "A". Please note that all values are
displayed as positive values. No minus sign will be shown. (Example for MSD 25 MR: For tube connection "B" the
measuring range covers -19.99 to 25.00 mbar. If you replug to port "A" under pressure measurements down to -
25.00 mbar could be carried out with the display showing the value 25.00 (no minus sign).
•For measurements of pressure differences:
Connect both plastic tubes with an internal dia of 4 mm to pressure port "B" and "A"; make sure to apply higher
pressure to port "B".
Absolute pressure sensors: (types: MSD/MXD...BA)
Connect plastic tube with an internal dia of 4 mm to pressure port "A". (Port "B" is not used.)
Stainless steel pressure sensors: (types: MSD/MXD...MRE, MSD/MXD...BRE, MSD/MXD...BAE)
For measurements of over-, under- or absolute pressure screw sensor to G1/4" pressure terminal or plug plastic tube to
a suitable adapter.
6 Error And System Messages
Display Meaning What to do?
Low battery power, device will only continue
operation for a short period of time Replace battery
Battery empty Replace battery
Mains operation without battery: wrong voltage Check power supply, replace it when necessary
No sensor connected Switch off device and connect sensor
Connected sensor or device defective If 2nd sensor available, check if device is ok. Return
defective device/sensor to manufacturer for repair
or Err.9 Value extremely out of measuring range Check: pressure not within sensor range?
Battery empty Replace battery
Mains operation: wrong voltage or polarity Check power supply, replace it when necessary
System error Disconnect battery and power supplies, wait shortly,
then reconnect
No display or
confused
characters,
device does not
react on keypress Device defective Return to manufacturer for repair
Measured value above allowable range Check: pressure not within sensor range?
-> measuring value to high!
Err.1
Sensor defective Return to manufacturer for repair
Measured value below allowable range Check: pressure not within sensor range?
-> measuring value to low!
Err.2
Sensor defective Return to manufacturer for repair
Err.3 Display range overflow Check: value above 19999 -> to high to be displayed
Err.4 Display range underflow Check: value below -19999 (Tara?) -> to low!
Value could not be calculated Choose different unit
Er.11 Calculation overflow happened Choose different unit
Err.7 System error Return to manufacturer for repair
Sensor not present / recognised
– – – –
could not calculate value Connect suitable sensor
7 Calibration Services
Calibration certificates – DKD-certificates – other certificates:
SIKA Dr.Siebert & Kühn GmbH & Co. KG ·• Struthweg 7–9 • 34260 Kaufungen • Germany • [phone] • [phone] • i[email protected] • www.SIKA.net

H61.0.12.6C-03 User’s Manual MH3111 page 8 of 8
If device should be certificated for its accuracy, it is the best solution to return it with the referring sensors to
the manufacturer.
Only the manufacturer is capable to do efficient recalibration if necessary to get results of highest accuracy!
8 Specification
Measuring ranges:
Display range: max. -19999...19999 digit, depending on connected sensor
Resolution: depending on connected sensor
Pressure units: mbar, bar, kPa, MPa, mmHg, PSI, mH2O
selectable depending on connected sensor
Accuracy: (typ.) ±0,1%FS (at nominal temperature)
Measuring rate: 4 meas./sec
Nominal temperature: 25°C
Sensor: All sensors of the MSD and MXD..-series without recalibration can be connected
Connection: Mini-DIN-Socket with locking mechanism
The sensor will automatically be detected, the measurement range settings are set
referring to sensor data
Additional Functions:
Power-Off-Function: Device will be automatically switched off if no key is pressed/no interface
communication takes place for the time of the power-off delay. The power-off delay
can be set to values between 1 and 120 min.; it can be completely deactivated.
Display: 2 four digit LCDs (12.4mm high and 7 mm high) for measuring values, and for min/
max memories, hold function, etc. as well as additional functional arrows.
Pushbuttons: 6 membrane keys
Interface: Serial interface (3.5mm jack) can be connected to RS232 or USB interface of a PC
via electrically isolated interface adapter GRS3100, GRS3105 or USB3100 (see
accessories).
Power supply: 9V battery, type: IEC 6F22 (included in scope of supply)
as well as additional d.c. connector (diameter of internal pin 1.9 mm) for external
10.5-12V direct voltage supply. (suitable power supply: GNG10/3000)
Power consumption: < 1.6 mA
Low battery warning: ' bAt '
Housing: impact-resistant ABS, membrane keyboard, transparent panel, Front side IP65
Dimensions: 142 x 71 x 26 mm (L x W x D)
Wight: approx. 150 g
Working temperature: -25...+50°C
Allowable rel. humidity: 0...95 %RH (not condensing)
Storage temperature: -25...+70°C
EMC: The device corresponds to the essential protection ratings established in the
Regulations of the Council for the Approximation of Legislation for the member
countries regarding electromagnetic compatibility (2004/108/EG).
Additional fault: <1%
9 Disposal notes
This device must not be disposed as ‘residual waste’. To dispose this device, please send it directly to us
(adequately stamped). We will dispose it appropriately and environmentally friendly.
SIKA Dr.Siebert & Kühn GmbH & Co. KG ·• Struthweg 7–9 • 34260 Kaufungen • Germany • [phone] • [phone] • i[email protected] • www.SIKA.net