Dräger Polytron 7000 User Manual

39
Start-up
Analogue signal
— A current between 4 and 20 mA flows through the transmitter during normal
operation. This current is proportional to the gas concentration.
— The Dräger Polytron 7000 transmitter uses various current values to indi-
cate the operational status of the transmitter:
Display
An alarm is triggered:
Current Meaning
4 mA
1)
1) Output current on delivery. The values may deviate by ±0.5 mA depending on the set
offset current.
Zero point
20 mA
1)
Full-scale value
<3.2 mA
1)
Transmitter fault
3.8 mA ... 4 mA
1)
Sensor drift below zero point
20 mA ... 20.5 mA
1)
Full-scale value exceeded
>23 mA Fault in analogue output
static signal: 3.4 mA
1)
dynamic AC signal: 5 mA
1)
for
0.4 seconds
and 3 mA
1)
for 0.7 seconds
Maintenance signal and signal during
the warm-up period
(configured on delivery: static)
Every 10 seconds
2)
for
1 second
2)
<3.2 mA
1)2)
2) Factory setting. Can be configured as desired, page 71.
Warning signal
(factory setting: off)
CAUTION
Exceeding or falling below the transmitter supply voltage specified in the
technical data can lead to an incorrect display of the analogue signal!
— In measuring mode, the display shows the actual gas concentration, e.g.:
— when rising above - for O
2
also when falling below - the alarm levels for the
concentration alarm,
— When the full scale deflection is exceeded:
The special symbol » « is displayed instead of the measurement
value.
— The measured value drops below the measuring range:
The special symbol » « is displayed instead of the measurement
value.
A006_en.eps
O
2
Vol.%
20.9
A013_en.eps
O
2
A1
19.0
A007_en.eps
O
2
Vol.%
Y Y Y Y
A008_en.eps
O
2
Vol.%
X X X X

Dräger Polytron 7000 Specifications

General

Brand	Dräger
Model	Polytron 7000
Category	Adapter
Language	English