Dräger Pulsar 7000 Serie Notice D'utilisation page 64

en Technical data
8.2 Measurement characteristics
Measurement characteristics
Measurement technology characteristics Spectral infrared absorption in two spectral ranges
a)
Measured gases
b)
Measuring range
Repeatability
Response characteristic t0 ... t90
with normal signal strength
Response characteristic t0 ... t90
with 5 % residual signal strength (e.g. in
case of fog or lens contamination)
Linearity error
Temperature effect on zero-point
Effect of pressure
Angle of acceptance of the receiver for
zero calibration
Angle of acceptance of the transmitter
for zero calibration
Angle of acceptance of the receiver
during operation
Angle of acceptance of the Pulsar TX S
transmitter during operation
Angle of acceptance of the Pulsar TX L
transmitter during operation
a) Substances other than those listed in the table can also be detected and produce a reading. The gas warning system is calibrated for the
specified gases.
b) Higher values which are extrapolated outside of the valid calibration of 8 LELm and display larger, non-specified uncertainties can also be
output on the digital communication interfaces.
c) With the Pulsar 7700 Duct Mount it can be assumed that the gas distribution within the duct is homogeneous. In this case, the integral
measured gas value with the unit LELm can be recorded as the gas concentration with the unit % LEL. Set the numerical value of the distance
between transmitter and receiver in metres as the full scale deflection. This way, an output current of 20 mA corresponds to exactly 100 % LEL.
64
Methane, propane, ethylene
c)
0 ...1 LELm to 8 LELm
0.1 LELm
Pulsar 7000 Open Path
with DIGITAL LINK: <2 s

without DIGITAL LINK: <2.5 s

Pulsar 7000 Duct Mount
with DIGITAL LINK: <1.5 s

Pulsar 7000 Open Path and Duct Mount
with DIGITAL LINK: <10 s

without DIGITAL LINK: <40 s

10 % of measured value or 5 % of measuring range, the higher value respectively
10 % of measured value or 5 % of measuring range, the higher value respectively
0.15 % rel. per hPa (only valid for methane)
Within a beam cone of ±0.15°
Within a beam cone of ±0.4°
Within a beam cone of ±0.6°
Within a beam cone of ±1.6°
Within a beam cone of ±0.6°