WIKA SF6 User Manual
Page 2
Technical alteration rights reserved.
WIKA Alexander Wiegand GmbH & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg
•
Germany
Phone (+49) 93 72/132-0
Fax
(+49) 93 72/132-406
E-Mail [email protected]
www.wika.de
9078061 01/2003 GB/D/F
10. Power ratings
Table 1: Maximum contact rating
Maximum contact rating
Magnetic snap-action contact model 821
with non-inductive
Gas filled gauges
Liquid filled gauges
(ohmic) load
Maximum voltage (MSR) U
eff
250 V
250 V
Current ratings:
Make rating
1.0 A
1.0 A
Break rating
1.0 A
1.0 A
Continous load
0.6 A
0.6 A
Maximum load
30 W 50 VA
20 W 20 VA
Note: None of the limit values for voltage,
current and capacity are to be exceeded!
We recommend the following load values to
ensure safe, continuous operation:
Table 2: Recommended contact ratings with
different nominal voltages and instrument
versions
Voltage
Magnetic snap-action contact model 821
(DIN IEC 38)
Gas filled gauges
Liquid filled gauges
DC / AC
ohmic load
inductive
ohmic load
inductive
load
load
DC
AC
cos
ϕ
>0.7
DC
AC
cos
ϕ
>0.7
V
mA
mA
mA
mA
mA
mA
230
100
120
65
65
90
40
110
200
240
130
130
180
85
48
300
450
200
190
330
130
24
400
600
250
250
450
150
The switching current must not be less than 20 mA
with low voltages for switching reliability reasons.
11. Overcurrent protection devices
No overcurrent protection devices are installed
in the instruments.
Should overcurrent protection devices be
required we recommend the following values in
accordance with EN 60 947-5-1.
Voltage 24 V:
2 A
Voltage 250 V:
1 A
Data refers to miniature fuses M and
a maximum short circuit current 100 A.
12. Repairs / Complaints
Repairs are to be carried out by the
manufacturer only. The instruments must not be
opened, as this would result in indication and
switching point errors.
In the case of complaints the manufacturing and
product identification numbers have to be
stated. The manufacturing number is indicated
on the dial, the product identification number on
the type plate. When measuring, the
atmospheric pressure, the temperature during
measurement and the data of the reference
standard (model, class) always have to be
indicated.
The density monitors have to be exposed to a
specific temperature long enough (at least 2
hours) to ensure temperature equalisation.
For higher loads, and instruments with liquid-filled
cases, we recommend the use of a separate relay,
WIKA Models 905.1X.