logika HMD-SM - HMD-SM Technical Specifications; HMD-SM Operating Principle; HMD-SM Detector Operating Principle

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 Email: info@logikatech.com
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2.2 Specifications
Operating temp
No water cooling:
0˚C to +50˚C (32˚F to 120
˚F)
With water cooling: 0˚C to 120˚C (32˚F to 250˚F)
Detect Range
0.2
-
8m
LED Indicators
Green = power on, Red = target detect, Orange= Detector signal
saturation or dirty lens, Off=Alarm
Output
Relay
NO/NC 250VAC
@ 1
A,
or 24VDC
@ 1
A
,
closing: 7.5ms, opening: 3ms
DC 24V PNP,NPN Transistor output: max 100mA
Diagnostic outputs: control, alarm, signal amplitude
Power Input
24 VDC, 110VAC, 220VAC @ 30VA
Cable
16 wires multi
-
conductor TEFLON cable with
9 x 20Ga
and
7 x 24Ga
Insulation 20MΩ, 500VDC, ≥500˚C (930˚F)
Housing
Hermetically sealed cast aluminum enclosure rated IP66, includes cooling
water connections and air purge.
Size
Enclosure;
315
mm L x 11
0
mm
W
x
2
64
mm H (with mounting bracket)
(12.4”L x 4.3”W x 10.4”H)
Weight
7
kg
or 15 lb
Min Target Temp
250
o
C (480
o
F)
S
canning Angle
10˚, 30˚, 50˚
Water Cooling
25 ˚ C, 4 bars pressure (60 psi), 1-2L/min (0.26 to 0.52 USG),
¼” flexible tube
Air Purging
50 to 200 g/cm
2
(0.7 to 2.8 psi), 4-16L/min (0.14 to 0.56 cfm)
¼” compression fitting
Table 2
2.3 Operating Principle
Detector- The HMD-SM uses a Lead Sulfide (PbS) photocell, which is characterized by a very
strong signal output for the range of infrared energy emitted by steel, compared with other
detector materials. The high signal-to-noise ratio from this detector virtually eliminates
detection errors. Figure 2.1 shows the various types of photocell spectrums and the
infrared emission spectrum of steel in 250 ˚ C and 1000 ˚ C.