juenemann-instruments DA20 Betriebsanleitung Seite 3

1.0 Installation and Commissioning
The digital indicator correspond to the regulation VDE/VDI 3512.
The mounting position should not be subject to strong vibration and radiation heat.
The digital indicators are immediately ready for service after insert the accu the electrical con-
nections have been made.
2.0 Service and Maintenance
The digital indicator described hereunder is maintenance free. It incorporates no components which
have to be repaired or replaced on the site. Repairs will exclusively be carried out at the factory.
Depending on working conditions, the pressure transmiter should be checked about once a year
to ensure that they are within their specifications and be adjusted if necessary. The calibration
procedure is as follows:
- s refe adjusting the measuring span, an adequately accurate resistance standard is required.
- For readjustment, loosen, with a left-hand rotation, the cam ring (bayonet type), and remove
from casing with the window.
- Set zero point via potentiometer „ZERO".
- Set span via potentiometer „SPAN".
- After having carried out service- and maintenance work, lock tightly the instrument with the cam
ring (bayonet type), the windiow and the sealing.
2.1 Current supply
The battery, Order N°: 409420, has a service life off appro. 500 active hours. In case the display
show "lowbat" continuously, the battery has to be replaced.
2.2 Operation
After activating the key, the measured value is displayed during 70 sec.
button
window
Typ DA20.H.3.N100
surface mounting flange
A b b1
NG
100 60 50 56
accu case
Typ DA20.U.1.N100
with surface mounting bracket
b3 b2 b4 c c1
mm
87
40 12 15 16,5
cam Ring (bajonet typ)
c2 D d1 d2
23 100,8 116 132
Typ DA20.H.2.N100
panel mounting flange
Typ DA20.H.4.N100 *)
triangular bezel
d3 d4
panel cut-out
4,8 107 105 *) 103
Quality for the
future
kg
0,7
3