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KMG-Lite
Closing force meter for
power-operated doors and gates
User manual
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At a glance
3 x AA 1.5V battery
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Contents
1. General notes 3
2. Safety advice 5
3. Intended purpose 7
4. Product description 8
5. Commissioning 10
6. Measuring 13
7. Warning- and error signals 20
8. Care and maintenance 24
9. Calibration 27
10. Accessories 29
11. Specifications 30
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1. General notes
This chapter provides important advice on using this
documentation.
The documentation contains information that must be applied if
the product is to be used safely and efficiently.
Please read this documentation carefully and familiarise yourself
with the operation of the product before putting it to use. Keep
this documentation to hand so that you can refer to it when
necessary.
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Identification
Darstellung Bedeutung Bemerkungen
Note Offers helpful tips and information
Objective Denotes the objective that is to be achieved
via the steps described
Step Carry out steps
Cross-
reference
Refers to more extensive or detailed
information
Display Shows the display output
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2. Safety advice
This chapter gives general rules which must be followed and
observed if the product is to be handled safely.
Product safety/ preserving warranty claims
Operate the instrument only within the parameters specified
in the Technical data. (
S. 30)
Always use the instrument properly and for its intended
purpose. Do not use force.
Do not open the instrument except for changing the batteries
as instructed in chapters 5 and 8.
The instrument must be sent to annual ca
libr
ation. (
S. 27)
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When not used, keep the gauge inside its transport case und
protect it from humidity and mechanical stress.
Ensure correct disposal
Take used batteries to the collection points provided for
them.
At the end of its useful life send the product back to GTE.
We will take care of its proper and ecological disposal.
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3. Intended purpose
This chapter gives the areas of application for which the product is
intended.
Only use the product for those applications which it was
designed for.
KMG-Lite is a compact handheld measurement instrument for
determining dynamic closing forces of power-operated doors
and gates.
Please consult specifications for the admissible maximum force. ( S. 30)
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4. Product description
This chapter describes the structure of the product and its display
and control elements.
Point of force application
8
Display
Control button
Battery plug
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9
Numeric measurement result
Indicator F
End
≥ 80
N
Indicator F
End
≥ 25
N
Indicator t
dyn
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5. Commissioning
This chapter describes the steps required to commission the product.
Removing the protective film on the display:
Pull the protective film off carefully.
Inserting batteries:
Remove battery plug at the e
n
d of the handle
by twisting it counter clockwise and
pulling it out.
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Insert three AA - type batteries with 1.5V each.
Mind the polarity!
Close battery plug: Press the batteries with the battery
plug against the spring resistance inside the handle and
lock it by twisting it clockwise.
+
-
Battery positive terminal ahead!
3 x AA 1.5V battery
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Activate the instrument:
Press the control button once.
While starting up the devices tests itself.
Startup test
The instrument is ready after thr
ee seconds.
Ready for measurement
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6. Measuring
This chapter describes the steps required to measure with the product.
Activate the instrument:
Press the control button once.
Wait for measure attendance.
Apply the force vertically and axial
Measuring automatically starts at 20 N.
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Within five seconds from of the 20N - trigger the force signal
is evaluated according to EN12453 and DIN18650.
Measurement/ Evaluation
Display of m
e
asurement results:
After the measurement and evaluation are finished, the
instrument automatically displays the dynamic peak force
F
dyn
that has occurred within measurement. The
measurement unit for this value is Newton (N).
Measurement result:
F
dyn
= 326 N
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If the dynamic time (t
dyn
) exceeded the normative 0.75
seconds, the LED within the second display segment flashes.
Measurement result:
F
dyn
= 326 N
t
dyn
> 0,75 s
If
th
e force value at the end of the 5s measurement period (F
End
)
exceeded 25 N, the LED within the third display segment
flashes.
Measurement result:
F
dyn
= 326 N
F
End
> 25 N
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If the force value at the end of the 5s measurement period (F
End
)
exceeded 80 N, the LED within the third display segment
flashes.
Measurement result:
F
dyn
= 326 N
F
End
> 80 N
If
th
e force value at the end of the 5s measurement period (F
End
)
exceeded 25N and the dynamic time (
t
dyn
) exceeded 0.75 s, the
LEDs within the second and the third display segment flash.
Measurement result:
F
dyn
= 326 N
t
dyn
> 0,75 s
F
End
> 25 N
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If the force value at the end of the 5s measurement period (F
End
)
exceeded 80N and the dynamic time (
t
dyn
) exceeded 0.75 s, the
LEDs within the second, third and fourth display segment flash.
Measurement result:
F
dyn
= 326 N
t
dyn
> 0,75 s
F
End
> 80 N
Display of the
value
t
dyn
:
After measurement press the control button once.
The display shows the value for the dynamic time in Milli-
seconds (ms).
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The LED within the second display segment is lit for orientation.
t
dyn
= 740 ms = 0,74 s
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Display of the value F
End
:
After measurement press the control button twice.
Das Display zeigt nun den Wert der Endkraft in Newton (N).
F
End
= 0 N
Th
e
LED within the second display segment is lit for
orientation.
By pressing the control button again, the display returns to
the dynamic peak force with the flashing segments for
indication of
t
dyn
and F
End
standard violation.
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Regardless of the current display state the instrument is
always ready to start a new measurement whenever
the required trigger force > 20 N is detected.
Deactivat
e
the instrument:
Keep the control button pressed for more than 2 seconds.
After 5 minutes of inactivity the device automatically turns
itself off.
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7. Warning- and error signals
This chapter explains all display signals that indicate an abnormal
system state.
Exceedance of measurement range
If the measured dynamic peak force exceeds the specified upper
limit of 1600 N, the display shows a flashing “1600”. The
measurement results for
t
dyn
and F
End
are not affected.
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Low battery warning
If the battery voltage falls below a critical value, the display
shows the message ”Batt“. By pressing the control button you
can still continue your measurements.
Change the batteries as soon as possible.
Error signal „Load rejection“
If the device senses a zero force offset on startup the display
shows the message “Err“. This message can also occurr if the
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device is used outside the specified temperature/humidity range
or if the force application plate got stuck.
Make sure the device is unloaded while starting up.
Make sure that all environmental conditions are within
the specified range.
Make sure that the force application plate is neither stuck
nor soiled. (
S. 24)
Reboot the device.
By pressing the control button you can continue your
measurement regardless of the displayed error.
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Error signal “Eich“-table missing
If the instrument’s display should show the message “Eich“ after
startup, the system is unable to find its calibration reference.
If this error message should occurr although the
instrument is used within the specified temperature
range, please send it to GTE for calibration. (
S. 27)
Sen
d
the device to GTE for calibration. (
S. 27)
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8. Care and maintenance
This chapter describes the steps that help to maintain the
functionality of the product and to extend its service life.
Safekeeping the instrument:
When not used, keep the gauge inside its transport case
und protect it from humidity and mechanical stress.
Protect the instrument from dirt. Dust and other particles
must not get into the measurement head.
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A soiled instrument can cause reduced measurement accuracy.
In case of doubt send the device to GTE for calibration. As part of
the calibration sensitive parts can be cleaned from dust particles.
Cleaning the housing:
Clean the housing with a moist cloth (soap suds) if it is
dirty. Do not use aggressive cleaning agents or solvents!
Changing the batteries:
Remove battery plug at the end of the handle
by twisting it counter clockwise and pulling it out.
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Remove old batteries and take care of proper disposal.
Insert three AA - type batteries with 1.5 V each.
Mind the polarity! Positive terminals ahead!
Close battery plug: Press the batteries with the battery
plug against the spring resistance inside the handle and
lock it by twisting it clockwise.
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-
+
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9. Calibration
To ensure the measurement accuracy the instrument has to be
calibrated every year.
Annual calibration is also mandatory according to DIN 18650
as well as EN 12445.
The calibration badge on the bottom of the device indicated
when the next calibration of your KMG-Lite is due.
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GTE offers two extent of calibration service.
Our standard service calibrates your device and protocols the
calibration with a factory calibration certificate.
If your device should be dirty or having problems to achieve
its initial measurement accuracy we additionally offer a
special maintenance and calibration service.
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10. Accessories
As addtional accessory for KMG-Lite we offer a Distance-Set,
which contains a robust measurement tripod and distance
pieces for typical measurement points.
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Distance elements
for horizontal gates
and doors:
Tripod for vertical gates
Open
ing heights:
30 an
d
50 cm
30 and
50 cm
Art.-Nr.: 320-2303-001
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11. Specifications
Voltage supply:
3 x 1.5 V - AA - Battery (Mignon)
Power consumption:
< 25 mA
Battery duty:
> 100 hours
Temperature range:
0 ... 40 °C
Humidity range:
20 ... 90 % r. F. (not condensing)
Dimensions of measurement plane:
80 mm , Height 50 mm
Dimensions:
250 x 80 x 50 mm (L x W x H)
Weight:
1 kg
Measurement range:
25 N ... 1600 N
Measurement accuracy*:
typ. 0,4 % of 2000 N @ T = 20 °C
Measurement error (max.):
25 N ... 399 N : 1 % of 2000 N
400 N ... 1399 N : 2 % of 2000 N
1400 N ... 1600 N : 3 % of 2000 N
Spring rate (mech. Filter):
500 N/mm
slew rate / fall time:
5 ms
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* Maximum accuracy only possible when force is applied vertically and axial.
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Notes
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K
MG-2000-G
Our high end closing force meter for all
applications.
High grade metal housing
Measurement range up to 2000 N
Graphical display with user menu
Internal memory for 500 measurements
USB-Interface for PC-Connection
Rechargeable battery operation
PC-Software for visualization, archiving and
printing of measurement protocols
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www.gte.de/KMG
KMG-2000-G
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GTE Indus
trieel
ektronik GmbH
Helmholtzstr. 21, 38-40
41747 Viersen, GERMANY
+49-2162 / 3703-0 +49-2162 / 3703-25
kmg@gte.de
www.kmg-lite.de
Art.-Nr.: 320-2010-200
V1.0 - November 2011
Technical changes reserved!
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