7 Appendix
│
47
7.4
Memory capacity
The total memory capacity of the device is divided up as follows:
Protocol type
Maximum number of storable protocols
Device inspection
40
Measurement
80
There is a choice of two memory modes (section 3.3.7
). The se
-
lected memory mode applies for all protocol types.
7.5
Sensors
Note:
Probes increase the stated response times.
7.5.1
Infrared sensors (IR)
7.5.1.1 Methane CH
4
(interspace)
Measuring range
0 ppm – 1.00 % vol.
Indication range
0 ppm – 2.5 % vol.
Resolution
50 ppm (0 – 950 ppm)
0.01 % vol (0.10 – 2.50 % vol.)
Response times
t
50
<9 s, t
90
<17 s
Temperature range
-20 °C – 40 °C
Measuring error
±15 % of measured value (linearity), at least
±100 ppm
Interference
all hydrocarbons
Lifetime, expected
5 years
7.5.1.2 Methane CH
4
(gas measuring)
Measuring range
0 – 100 % vol.
Resolution
0.1 % vol. (0 – 79.9 % vol.)
1 % vol. (80 – 100 % vol.)
Response times
t
50
<9 s, t
90
<17 s
Temperature range
-20 °C – 40 °C
Measuring error
±1.5 % from end of measuring range
Interference
all hydrocarbons
Lifetime, expected
5 years
