Dräger PIR 7000 Technical Handbook

55
Maintenance
Example: If the gas transmitter Dräger PIR 7000 has been calibrated under normal air
pressure (1013 mbar), a pressure change to 900 mbar would result in the following change of
the measuring value:
(Remedy: Applying 50 %LEL calibration gas at 900 mbar pressure)
Preparing Calibration
● Provide calibration gas.
For gas transmitters with mounted splash guard PIR 7000 / 7200:
● Push calibration adapter PIR 7000 onto the splash guard until it locks into place.
For gas transmitters with mounted flowcell PIR 7000 / 7200, bump test adapter PIR 7000 /
7200, process adapter PIR 7000 or process cuvette PIR 7000:
● Connect calibration gas feed directly to the flowcell, the bump test adapter, the process
adapter or the process cuvette.
Calibration Using the Magnetic Wand
The calibration can be performed directly at the gas transmitter using the magnetic wand (part
no. 45 43 428).
50 %LEL X
900 mbar
= 44 %LEL
1013 mbar
NOTICE
When delivered, the gas transmitter is calibrated with a reference pressure of 1013 mbar.
Deviations from this reference pressure can lead to deviating measured values at any
concentration.
CAUTION
Always first calibrate the zero-point before the sensitivity (span).
Calibration using the magnetic wand:
— The gas transmitter has the marks on two
opposite sides; » 0 « for "Zero-point" and
» S « for "Sensitivity (span)".
● For calibration, place the magnetic wand
onto the respective mark.
03023886_01.eps
S
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