Logika Technologies Inc. Model HMD-SM Operator’s Manual
Rev 2.1 Dec-
13
Web
:
www.logikatech.com
Phone
: 905-829-5841
Fax
: 905-829-8787
:
P a g e
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A
m
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t
T
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m
p
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a
tu
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60
80
100
120
140
160
°C
Water
0.3
0.5
1.0
1.5
2.0 L/M
8 °C
20 °C
25°C
Figure 4.2 Ambient Temperature vs. Water Flow Rate
4.3 Purge Air Connection
Description-
Compressed plant air can be used to protect the lens from dust and vapor.
Purge air cleans the lens, reduces maintenance times, and prolongs sensor life where dust
or corrosive vapor is present.
Purge Air Requirements
•
Must be clean, dry instrument air, no oil, dust and contaminants included. Poor air quality
will result in dirty lens and decrease detector performance. If the quality of compressed air
can’t be guaranteed, it is better not connect it to the sensor to avoid the lens
contaminated and affect the sensor’s performance.
•
Air filtration prior to the inlet fitting is recommended to improve the quality of purge air
•
Air Pressure range from 50 to 200 g/cm
2
(0.7 psi to 2.8 psi)
•
Air Flow rate from 4 to 16 L/min (0.14 to 0.56 ft
3
/min)
Connection-
Connect the plant air source to the purge air barbed fitting on the sensor’s
lens shroud with Φ10mm ID (or 3/8” ID) hose. Purge air flows out of the sensor shroud
and dissipates into the ambient environment.
5. Operation
5.1 Control Panel
The HMD-SM Sensor’s Control Panel is located at the rear of the enclosure. The following
functions are available on the Control Panel, see Figure 5.1.
