Dräger PIR 7000

64
Maintenance
LEL values [% vol.]
1)
– Methane:
– Propane:
– Ethylene:
as per
NIOSH IEC PTB
5.0 4.4 4.4
2.1 1.7 1.7
2.7 2.3 2.4
each individually modifiable by a maximum of ±25 %
not applicable
Analogue output
– Maintenance signal 3 mA (constant)
(configurable: either constant 0.7 ... 3.6 mA
or alternating 3 mA for 0.4 seconds / 5 mA for 0.7 seconds)
– Fault signal <1.2 mA
(configurable: 0.7 ... 3.6 mA)
– Beam block warning Active / inactive
(configurable: 0.7...3.6 mA, factory-preset: 2 mA)
– Warning signal Active / inactive
(when active: fault signal every 10 seconds for 0.7 seconds, otherwise
measured-value signal)
Zero-point capture value
– Capture value 0 %LEL
+340 ppm
(configurable within the capture value limits)
– Capture value limits ±1.5 % LEL
±200 ppm
(configurable up to ±50 % of the full-scale deflection)
Calibration range limits:
– Zero-point
Configuration of ranges
1 and 2 by shifting the
limit (see page 49): 0...50 %...100 %
= 0...1.5 %LEL...3 %LEL
0...45 %...100 %
= 0...0.013
% vol....0.03 % vol.
– Sensitivity (span)
Configuration of ranges
1 and 2 by shifting the
limit (see page 49): 0...33 %...100 %
= 0...5 %...15 % deviation from last saved calibration value
SIL lock ON / OFF
Response mode normal / fast
1)
The LEL values are derived from NIOSH (LEL category 1), in accordance with IEC 60079-20 (LEL category 2) and in accordance with
Brandes / Möller – Sicherheitstechnische Kenngrößen, Band 1: Brennbare Flüssigkeiten und Gase (LEL category 3).
Dräger PIR 7000 Dräger PIR 7200
Type 334 Type 340