Haehne DMA3 Manual
Connection diagram Sensor B does not exist
in case of single-side
measurement
Diff erent connection
in case of explosion
proof application
The four terminal blocks with fi ve terminals
each can be seperatly plugged in, simplifying
trouble shooting in case of faults.
Recommendation: Connect the PE-terminal No. 5 of the amplifi er with a
short cable with one of the separate PE-terminals on the DIN rail.
PE terminal
PE terminal
yellow
white
brown
green
yellow
white
brown
green
V1
Output signal of full bridge
strain gauge
V2Direct voltage output
V3Filtered voltage output
V4
Excitation voltage to the full
bridge strain gauge in the sensors
V5Supply voltage 24 V DC
I1Current output (option C and N)
For Zero point adjustment use the
voltage output (V2)
HAEHNE Elektronische Messgeräte GmbH · Heinrich-Hertz-Str. 29 · D-40699 Erkrath Germany · Telefon 0211/9 25 91-0 · Fax 0211/9 25 91-20
http://www.haehne.de Email: [email protected]
Digital Measuring Amplifier DMA3
Technical Information
Sensor cable lead color
with connection variant:
N3, S, S3, S4, T
V
1: Signal voltage
V
4: Supply voltage
Sensor cable lead color
with connection variant:
N1, N2, S1, S2
HAEHNE Elektronische Messgeräte GmbH · Heinrich-Hertz-Str. 29 · D-40699 Erkrath Germany · Telefon 0211/9 25 91-0 · Fax 0211/9 25 91-20
http://www.haehne.de Email: [email protected]
DMA3
DMA3 TI EN 02_19.indd Technical modifi cation reserved
Adjustment instructions
- Apply power and select fi lter type (fi ltered/unfi ltered), only option C and N.
- Allow 15 min warm-up time.
- After the sensors are completely mounted remove all material exerting an
external force, except the forces acting under normal conditions. In case of web
tension sensors this is the measuring roll without web, e. g. plastic,
fi lm, paper...
- Perform zero adjust.
- Apply force or weight of approximately 70 to 110 % of nominal value (as availab-
le). Adjust to corresponding value on the display and store.
- Remove force or weight and perform zero adjust if necessary.
Display and operating elements
DOWN
UP
SET
MENU
LED DISPLAY
1. Select menu 2. Ad- 3. Storing
point with LED blinks Display justing Note
Filter behaviour Fil. dir / Fil Fil. Is always ON if current output
current output (direct/fi ltered) is set to „fi ltered“.
Zero point Zero -10.0…100.0% Enter a value diff erent from 0 in order to activate
calibration the two-point calibration.
Calibration Cal. Calibration weight
with defi ned 10.0…110.0 %
load
Manual Gain Amplifi cation
amplifi cation factor
adjustment 250…4000
Extended adjustment possibilities:
Value display Cal. Gain range 100% = Standard: %-display (100 without decimal point)
adjustments Actual value: display according to the selected
dimensions with decimal (decimal point-display)
Peak value Fil. Gain real time maximal
display
minimal
Display all LED’s all segments strongly
intensity
weakly
Output Zero Cal bi / uni bipolar bipolar (standard) : ±100% = ± 10V
mode 0 - 100% = 4(0) - 20mA
unipolar unipolar: ±100% = 0 - 10V
±100% = 4(0) - 20mA
.
The menu is deactivated if no button is pressed within 20 seconds. Exit from the menu by pressing the key several
times. If the maximum output voltage during normal operating conditions is overloaded to approx. (-)12 volts the (-)OFL
display will appear. Interrupted sensor cables lead to the IOFL display. During the adjustment procedure the display OFL
has no special meaning.
The step range
increasees by
holding the button
Pressing the SET button illuminates the corresponding LED. The LED goes OFF
after 4 seconds have elapsed and one can release the button. After that the LED is
ON until the corresponding procedure is completed.
To go to menu press + simultaneously. However, need to be pushed fi rst.
> 4 sec
Operating Instructions
100 … 2000.
10.0 … 200.0
1.00 … 20.00
With two point calibration and in unipolar output
mode the zero point is to be adjusted again.
Recommendation: 70 - 110%. If the two-point
calibration is activated then values higher than
fi rst calivbration point + 10% can be entered. If
„Gain“ appears on the display, then the necessary
amoplifi cation is out of the possible range. Under
menu option „Gain“ the necessary amplifi cation is
indicated. appears „zero“ on the display, then the
eff ective calibration weight is too small.
These are adjustments, therefore the calibration
has to be made after the appropriate selection.
Set key deletes the peak values. A change of the
real time display and the output mode deletes also
the peak values.
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