Dräger PIR 7000 Technical Handbook

34
Accessories
Example for the dependance of the
concentration display of methane test gas in
the range 0 to 25 % vol.:
— Dräger Safety recommends a test gas
flow of 0.5 to 1.0 l/min.
NOTICE
After using flowcell with test gas, the
system must be purged carefully using
compressed air or nitrogen. Residual test
gas in the flowcell or in the feed hoses may
cause zero-point deviations over longer
periods.
Conversion factors for Dräger models PIR 7000 / Dräger PIR 7200:
Methane Propane Ethylene Carbon dioxide
Dräger PIR 7000
type 334
4.2 4.2 3.3 – – –
Dräger PIR 7000
type 340
4.4 3.7 – – – – – –
Dräger PIR 7200
– – – – – – – – – 3.8
02123886_01_en.eps
concentration of the calibration gas
[% methane by vol.]
display at the handheld terminal
[% methane by vol.]
display at the handheld terminal
[% LEL methane]
01020
5,0
4,5
4,0
3,5
3,0
2,5
2,0
1,5
1,0
0,5
0,0
100
80
60
40
20
0

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