Dräger PIR 7000 Technical Handbook

48
Operational Characteristics
Any arising risk caused by flammable gases or vapours or caused by carbon dioxide above a
concentration of 15 %LEL/15 %FSD will still be detected. For this purpose, the gas transmit-
ter switches back to measuring mode and displays the measured value between 4 and 20 mA
either digitally or at the analogue output.
This procedure allows for any necessary service measures to be better scheduled and
controlled since no immediate intervention / cleaning is required.
In case the contamination should reach a degree which no longer allows for the safe detection
of gas concentrations above 15 %LEL/15 %FSD, a fault status will be emitted, either digitally
or with the associated factory-preset 1mA analogue signal (configurable between 0.7 and
3.6 mA). In this case the measurement readiness of the system is no longer guaranteed.
Warning
The Dräger PIR 7000 / Dräger PIR 7200 gas transmitter can be set to output a second
warning via 4 to 20 mA current interface. This is the device status "Warm-up 2".
If this warning is activated (e.g. via Dräger CC--Vision GDS Software), the current output is
switched to "fault signal" for approx. 0.7 seconds. This is repeated every 11 seconds. In the
factory-preset configuration of the gas transmitter, the warning is set to "inactive".

Dräger PIR 7000 Specifications

General

Detection Principle	Infrared (IR)
Pressure Range	700 to 1300 hPa
Ingress Protection	IP66/67
Gases Detected	Hydrocarbons
Measurement Range	0 - 100 %LEL (Lower Explosive Limit) or 0 - 100 vol.%
Operating Temperature	-40 to +65 °C
Output Signal	4-20 mA
Housing Material	Stainless steel
Certifications	ATEX, IECEx, UL, CSA
Response Time	t90 ≤ 4 s