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4
Interchangeable sensors with technical specs
4.1. Leak detection on gas installations
The change sensor HC400 is used to locate gas leaks from CH
the change sensor HC401 it is also possible to search for C
sensor HC402 it is also possible to search for H
After the warm-up time of 30 seconds, the measuring window opens automatically
and the measurement begins.
If necessary, reset the zero point with the F2 key.
Slowly guide the sensor along the points to be tested. If there is a leak, the meas-
ured value changes and the flashing frequency of the red LED in the sensor foot in-
creases with the increase in the measured gas concentration..
Functions in the Context menu:
function
Signal ON (Key F1)
Signal ON (Key F1)
Zero point (Key F2)
Max = 0 (Key F3)
Setting
Printout (Dr)
Meas. menu (ESC)
Info
Choice ( >>) ( <<)
„Arrows right/left"
Settings: To trigger signals (signal ON /signal-OFF) for CH
signal thresholds must be set separately for each gas in the context menu/settings.
Gas
CH
[ppm]
4
CH
[%]
4
CH
[% LEL]
4
C
H
[ppm]
3
8
C
H
[%]
3
8
C
H
[% LEL]
3
8
H
[ppm]
2
H
[%]
2
H
[% LEL]
2
Technical Specification:
Sensor HC40X
CH
-sensor
4
C
H
-sensor
3
8
H
-sensor
2
Danger due to improper use
Non-compliance with the measurement rules can result in fatal
accidents.
The meter may only be used for advertising purposes to locate
gas leaks in the installation area.
MRU GmbH, D-74172 Neckarsulm
USER MANUAL 400DH
2
explanation
With this function the signal is switched on.
With this function the signal is switched off.
With this function the sensor is zeroed.
The value Max is set to zero.
Setting units and Signal thresholds
Printout is generated, a printer is required for this
function.
Exit measuring program
The information (sensor name, page number, firmware
version) about the sensor is displayed here.
HC401: Switching between CH
HC402: Switching between CH
Adjustable Signal thresholds
10 ... 500 ppm
0,001 ... 0,050 %
0,02 ... 1,14 % LEL
10 ... 500 ppm
0,001 ... 0,050 %
0,06 ... 2,94 % LEL
10 ... 500 ppm
0,001 ... 0,050 %
0,03 ... 1,25 % LEL
range
resolution
0 ... 44.000 ppm
1 ppm
0 ... 17.000 ppm
1 ppm
0 ... 40.000 ppm
1 ppm
DANGER
in installations. With
4
H
and with the change
3
8
gas leaks.
, C
H
4
3
8
, C
H
and H
4
3
8
2
, C
H
and H
4
3
8
2
response time
< 5 Sec.
< 5 Sec.
< 5 Sec.
the desired
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