Page 6
Figure 2. Dumo grounding
Wiring
: please note that 24 VDC is the absolute maximum value of voltage
used. Because of this, the user should pay attention to possible voltage peaks
when using the device. Care must be taken especially when the device is
powered from the power supply in an industrial environment.
4. TECHNICAL SPECIFICATIONS
Measurement objects
Solid particles in ambient air
Particle size
0.3
μ
m or larger
Measurement principle AC signal (charge transfer)
Averaging time
1 – 1 h 30 min
Output signals
2 solid state relays
Isolated 4-20 mA
Serial communication
Ambient temperature
-20...+60 ºC
Enclosure / casing
Aluminium
,
Stainless steel
Power supply
24 VDC
Cable connection
5 meter cable
Weight About
3
kg
5. OPERATION
Dumo measures solid particles in ambient air. The device has “Alert” and
“Alarm” levels which correspond to certain dust concentration levels above the
“Normal”. These three levels are indicated by Red, Yellow and Green colours
of indicator led in front cover.
Green
Normal level
Yellow
Alert level
EASTERN ENERGY SERVICES PTE LTD.
60 Kaki Bukit Place #02-19 Eunos Tech Park Singapore, SG 415979 Singapore
Telephone: +65-6748 6911 Fax: +65-6748 6912
Email: [email protected] Website:
www.eesgroup.com