hmd(hotmetaldetector) 3000 brochure

557 Long Road Pittsburgh, PA 15235 , USA Email: [email protected] www.americansensors.com Tel : 412-242-5903 fax : 412-242-5908

12-05 Rev.2 HMD-3000 Series Hot Metal Detector 1 of 8

HOT METAL DETECTOR

HMD-3000 SERIES

NON-CONTACT, RELIABLE, PRECISE, LONG-RANGE PRODUCT DETECTION FOR ALL PRODUCTS FROM 200°°°° C (392°°°° F) EVEN IN

THE PRESENCE OF STEAM, SCALE AND WATER.

• ALL-OR-NOTHING SIGNAL INDICATIVE OF PRODUCT

PRESENCE • ANALOG OUTPUT INDICATIVE OF PRODUCT TEMPERATURE • DIGITAL • AUTOMATIC GAIN CONTROL (AGC) • 24 VDC or 80V to 260VAC, 50 Hz / 60 Hz.

APPLICATIONS:

HMD-3000 is the best designed and the most precise detection system for all hot metal applications including: • Tracking. • Positioning. • Cooling Beds.

• Caster Torches. • Cut-to-Length. • Annealing.

• Width Control. • Mill Water Control

MADE IN THE USA

0.57º

2.85º



DESCRIPTION:

The Hot Metal Detector (HMD) uses infrared sensitive PbS photocell to detect radiation from hot objects starting as low as 200°C. The incoming radiation is chopped with blades of miniature fan and converted to electrical signal. The electrical signal is amplified in the two-stage programmable gain amplifier as shown in Figure 1. The HMD-3000-S is the Standard version and the HMD-3000-D is the Digital version . • The first amplifier (Receiver) has built in temperature compensation to correct temperature

related variations of the photocell responsiveness. The Receiver has two gain controls: x2 and x5, which provide four gain selections: 1, 2, 5, 10. Gain adjustment range is sufficient for most applications. The adjustable aperture at the front of the hood can reduce any additional radiation level. (Double Diaphragm option).

• The amplified signal is fed to the Discriminator Circuit, which compares it with the preset

threshold voltage and activates the relay and opto-coupled MOSFET when signal exceeds the threshold.

• The amplifier output is also fed to the Amplitude Detector, which produces DC voltage

proportional to the amplitude of the chopped signal. This voltage drives the 4-20mA converter, which produces the HMD current loop signal. The 4-20mA signal is proportional to radiation from the hot object and can be used to monitor process temperature.

• The Digital version, HMD-3000-D has digital output of threshold, gain and the temperature inside the sensor in °C

• Automatic Gain Control (AGC) allows the sensor to choose the best gain setting so that the

energy of the signal is always between 30000mV and 8000mV. This means that it is never saturated (over 9969mV) and never less than 3-times the threshold. This feature is particularly good for intermittent steam conditions, different size targets, or different temperatures, or a combination of conditions.

CHOICE OF PHOTOCELL: The HMD 3000 is designed to use a lead sulfide (PbS) photocell. Lead sulfide has superior hot metal detection capabilities. The output level is sufficient to provide reliable detection even with product temperatures as low as 200°C and is continuous when the hot product is within the viewing field.



Figure 1: Two-Stage programmable Gain Amplifier

Fiber Optic Cable: FOC-6 For applications where very hot objects must be monitored from a close distance or limited space would not allow installation of the HMD unit in desired location, American Sensors offers the Fiber Optic Probe, which allows locating the HMD unit up to 6m (18 feet) from the monitoring point.

RECEIVER Amplifier

LaserPointer

Lase

r Con

trol

4/20mAConverterRelay

Gai

n x2

ON

Control PanelGain/Threshold/Test Switches

Status LEDsThreshold adjust

Gai

n x5

ON

HMD Block Diagram

AmplitudeDetector

Discriminator

Opto-coupler

Threshold

Chopper

TERMINAL BLOCKS

74 cm (5 Ft)

Air (in)

Air (out)

Water Water (out)

D

5m ( 16.5 Ft) Fiber optic length

Water in

21.6 cm (8.5”)

HOT PRODUCT (SLAB. BILLET, ROD..)



SPECIFICATIONS:

HMD3000 HMD3000-D

Scanning

SENSITIVITY RANGE Adjustable gain (1, 2, 5 or 10) via switches Adjustable gain (1, 2, 5 or 10) via serial link

DETECTION THRESHOLD Adjustable/Programmable, available at 4-20 mA

Adjustable/Programmable, available at 4-20 mA and digital output

ENERGY Signal amplitude at 4-20 mA Signal amplitude at 4-20 mA and digital output

AUTOMATIC GAIN CONTROL NA Enabled via digital link

PHOTOCELL OPTIONS PbS or Si

NARROW ANGLE DETECTION Horizontal 0.57° Vertical 2.85°

Signals

SWITCHING POWER 350VA with 250V Max. 10A Max

DETECT RELAY Triggers on object detected and object detected within window Closing time: 7.5 ms / Opening time: 3 ms

SOLID STATE OUTPUT MOSFET isolated optocoupled relay 0/24 VDC & 24/0 VDC, 100 MA Response time: 2 ms

DIGITAL OUTPUT RATE NA 40 ms to 1 sec

FAULT RELAY Triggers on power fault, 4-20mA fault, scanner fault, and over temperature limit

Electrical

POWER SUPPLY 80 to 240 VAC / 15 W (50-60 Hz) or 24 VDC (23 V to 26 V) / 8 W

POWER CONSUMPTION 20 VA or 10 VA for 24V

SHIELDED CABLE 2 Meter, high-temperature Teflon cable

CONNECTOR Quick disconnect 15-pin HARTING plug with ground shield

SERIAL LINK DIGITAL COMMUNICATION NA RS232 and RS485

Mechanical

LASER POSITIONING 650nm (red) Class 2 laser

HOUSING Hermetically sealed cast metal housing rating: IP66 (NEMA 4 & NEMA 12)

WATER / AIR COOLING Removable water / air-cooling jacket with quick disconnect connections

PROTECTIVE HOOD Hinged protective hood with positive pressure air purge: 4-16 liters/min (0.14 -0.56 ft3/min) at 2 bars (29 PSI)

MOUNTING Fully Adjustable foot mount swivel stand

TOTAL WEIGHT Approx. 9 kg (20 Lbs)

OPERATING TEMPERATURE 10°C (-14°F) to 60°C (140° F)

Above 65°C (149° F) auxiliary cooling is required: 1-2 bars (14.5 - 29 PSI) at 1-2 liters/min (0.035 - 0.07 ft3/min)

STORAGE TEMPERATURE 20°C (-4°F) to 70°C (158° F)

INSIDE TEMPERATURE Alarm (fail safe) Alarm (fail safe) + Digital output in °C

WARRANTY 2 Years



MECHANICAL DRAWINGS: HMD-3000 with Standard Tubus

HMD-3000 with Brick Tubus



WIRING DIAGRAM: (ANALOG)



WIRING DIAGRAM: (DIGITAL)



PRODUCT ORDERING:

Analog / Digital Tubus type Photocell Input Voltage Detection Wiring Analog

Outputs

HMD

• 3000 Analog

• 3000-D Digital

• STAN Standard 30°

• BRICK Brick • FOC Fiber Optic

• PBS (Standard) • SI (fast response)

• DC: 24 V • AC: 80 to 240 V

• D Direct or Delta • I MOSFET Isolated • NA North American

(Fault Relay 115 V)

• 4-20 mA • 0-20 mA • 0-10 V • Custom

(Specify)

ACCESSORIES:

HS 500: Adjustable stand, support and swivel heat shield CB 500: Connection box with LED display RB 500: Portable radiant bar to simulate hot target RB-3000: Mill duty radiant bar to simulate hot target

KP-3000: Hand-Held Programming & diagnostic Terminal

HL 20002: Extension Cable

hmd(hotmetaldetector) 3000 brochure

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