MAHA SKM 2 User manual

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SKM 2
Closing Force Meter
Original Operating Instructions
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Contents
1
Description .......................................................................................................... 3
1.1 Intended Use ...........................................................................................................3
1.2 Components ............................................................................................................3
1.3 Specifications...........................................................................................................4
2
Operation ............................................................................................................ 4
2.1 Button Assignment...................................................................................................4
2.2 Switching On / Off....................................................................................................4
2.3 Connecting the Force Sensor...................................................................................5
2.4 Opening the Service Menu .......................................................................................5
2.5 Setting the Contrast .................................................................................................5
2.6 Setting the EEPROM User Variables.........................................................................6
2.7 Test Programs .........................................................................................................8
2.8 Output Values ..........................................................................................................9
2.9 Adjustment.............................................................................................................10
3
Maintenance...................................................................................................... 11
3.1 Spare Parts............................................................................................................11
3.2 Maintenance by the Operator .................................................................................12
3.3 Charging the Battery ..............................................................................................12
4
Disposal ............................................................................................................ 12
5
Contents of the Declaration of Conformity ........................................................... 12
6
Company Information......................................................................................... 13
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3
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1
Description
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1.1
Intended Use
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This device is used to measure the closing force of power-controlled doors.
Any further uses beyond this range of application are prohibited.
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1.2
Components
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A Measuring Unit with Display C Power Supply Unit
B Force Sensor D Handling Box
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A
B
C
D

4
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1.3
Specifications
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Measuring range .....................................................................................0…995 N
Accuracy .................................................................................................... ± 10 N
Temperature range .............................................................................+5...+ 40 °C
Height of measuring cell............................................................................115 mm
Diameter of measuring cell ........................................................................100 mm
Display resolution............................................................................64 x 128 pixels
Supply voltage of internal NiMh battery................................................6 V; 700 mA
Supply voltage of power supply unit .........................................230 V DC/ 12 V AC
Weight including handling box......................................................... approx. 3.5 kg
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2
Operation
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2.1
Button Assignment
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Left-hand button Right-hand button
Push and hold
button (2 sec)
•Open the service menu
(when connecting power
supply unit)
•Exit menu item or service
menu
•Save contrast or variable
value
•Display battery voltage /
version number (when con-
necting power supply unit)
•Change variable value
•Move cursor position to the
right
Push button brief-
ly
•Page backward
•Reduce contrast or variab-
le value
•Delete input
•Move cursor
position to the
left
•Open menu item
•Page forward
•Increase contrast or varia-
ble value
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2.2
Switching On / Off
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•To switch on press either one of the buttons.
•The device switches off automatically when the switch-off time has expired. The
switch-off time can be set using EEPROM variable 4.
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2.3
Connecting the Force Sensor
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•Connect the force sensor to the 9-pin D-sub connector.
•The offset adjustment is carried out.
If the offset adjustment is not possible, the message "Offset error" appears on the
display and the offset adjustment is repeated.
No load must be applied to the force sensor during the offset adjustment.
The offset adjustment can also be started by pressing either button for at least
2 seconds.
•The device switches off automatically when the switch-off time has expired,
provided the force value does not exceed 20 N during this period. The switch-
off time can be set using EEPROM variable 4.
•The maximum value memory on the display is deleted when the device switch-
es off or either button is pressed.
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2.4
Opening the Service Menu
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The programming is done at the factory. Any changes to the preset variables may
result in malfunction.
1 Press the left-hand button.
2 Connect the power supply unit.
3 Hold the left-hand button, until the Menu Selection appears.
4 Remove the power supply unit.
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2.5
Setting the Contrast
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1 Open menu item "Contrast" using the right-hand button.
2 Reduce the contrast using the left-hand button, increase it using the right-hand
button.
3 Save your setting by pressing the left-hand button for 3 s.
4 Exit the service menu by pressing the left-hand button for 3 s again.
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2.6
Setting the EEPROM User Variables
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1 Open menu item "EEPROM User Variables" using the right-hand button.
2 Select the desired varaible using the left- or right-hand button.
3 Press the right-hand button for 2 s.
4 Press the right-hand button briefly to increase the variable value.
5 Press the right-hand button for 2 s to jump to the next input position.
To delete erroneous inputs, briefly press the left-hand button.
6 Save your changes by pressing the left-hand button for 2 s.
7 Exit the menu item/service menu by pressing the left-hand button for 2 s again.
List of EEPROM User Variables
Name
1
PED 200 or SKM 2
0 = PED 200
1 = SKM 2
1 0 1
2 Variable not used -1
3 Variable not used -1
4 Switch-off time in seconds 60 10 65535
5 Pedal force meter Factor 1000 900 1100
6
Illumination status
0 = Illumination always OFF
1 = Illumination ON with Pedal force meter
2 = Illumination always ON
1 0 2
7
Signal sensor status
0 = No signal sensor
1 = Signal sensor for buttons enabled
1 0 1

7
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Name
8
RS232 Baud rate
0 = 4800
1 = 9600
2 = 19200
3 = 38400
3 0 3
9 Variable not used -1
10
Language
0 = German
1 = English
2 = French
3 = Italian
4 = Dutch
5 = Spanish
6 = Norwegian
7 = Croatian
8 = Czech
9 = Polish
10 = Danish
11 = Finnish
0 0 12
11 Variable not used -1
12
Pedal force meter Resolution
0 = Resolution 5 N
1 = Resolution 1 N
1 0 1
13
Position detection, only for SKM 2
0 = Position detection disabled
1 = Position detection enabled
1 0 1
14 Offset adjustment with buttons allowed 1
15
Threshold in N
0 = Force is measured > 0 N
5 = Force is measured > 5 N
5 0 10
16 Variable not used
17 Variable not used
18 Variable not used
19 Pattern to recognize an empty EEPROM with
65535; Reset only for User variables -23206
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2.7
Test Programs
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1 Press the right-hand button.
2 Connect the power supply unit.
The software version number appears on the display.
3 Hold the right-hand button for another 2 s.
Battery voltage, charging voltage and charging current appear on the display
while the button is held.
4 Release button and remove power supply unit.
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2.8
Output Values
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The functions described are available in software V0.15 (22.09.2011) or later.
Peak Force FS
(in this example 561 N)
The peak force FSis the maximum value of the closing force.
If FS> 999 N,
---N
appears on the display.
Effective Force FE
(in this example 220 N)
The effective force FEis the mean value of the closing force in relation to the pulse
duration.
If FE> 999 N,
---N
appears on the display.
Pulse duration T
(in this example 6.3 s)
The pulse duration starts when the closing force exceeds 50 N and ends when it
falls below 50 N.
If T > 99,9 s,
--,-s
appears on the display.
Clamping Force F
(in this example 299 N)
The clamping force F is the arithmetic mean of the effective forces.
If F > 999 N,
---N
appears on the display.
Current Force
(in this example 189 N)
In the bottom right-hand corner the current force in N is displayed.

10
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Starting a New Measurement
A new measurement is started when
•the measuring unit is switched on.
•the force sensor is connected to the measuring unit.
•the maximum force exceeds 999 N.
•either button is pushed.
Offset Adjustment
An offset adjustment is carried out when
•the measuring unit is switched on.
•the force sensor is connected to the measuring unit.
•either button is pushed for at least 2 seconds.
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abgleich
2.9
Adjustment
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If the meter is not exactly adjusted, a correction factor must be entered in
variable 5.
1 Load the meter with a known weight (e.g. 30 kg).
The meter display shows the weight in Newton, e.g. 305 N.
In fact, the meter should display 30 kg •9.81 
≈294 N.
2 Calculate correction factor:
Correction factor =  
  •1000
In this example: Correction factor =  
 •1000 ≈964
By entering the correction factor in variable 5, the display error can be
compensated for.
3 Open the service menu and select
menu item "EE-User variables".
4 Press the right-hand key to open the
user variable program.
Menu Selection
EE-User Variables
5 Select user variable 5 with the left-
hand key (previous variable) or right-
hand key (next variable).
6 Open the variable with the right-hand
key (long press).
EEPROM Variables
Factor Force
Var 5: 1000