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R2121

FLAME SENSOR UVtron®

Hamamatsu Photonics 

FLAME SENSOR UVtron®

Figure 4: Recommended Driver Circuits

10 MΩ

4.7 kΩ*

+

ANODE

SUPPLY VOLTAGE

220 pF

500 V

–

CATHODE

PULSE OUTPIT

i 10 kΩ 1000 pF

* This 4.7 kΩ resistor must be connected within

2.5 cm from the tip of the UVtron anode lead.

TPT C0016EA

IPRECAUTIONS FOR USING THE UV TRON

GUV TRON light emission

When the UVtron discharges, it emits ultraviolet radiation. If a number of UVtron are used in close proximity, they must be

arranged so that they will not interfere with each other optically.

GHumidity

Humidity around the leads for the UVtron generates leak current, dropping the anode voltage, and stopping the tube from

operating. In particular, if dirt, dust etc. get on the leads, that makes it easier for humidity to be absorbed, so keep the area

around the leads clean.

GDirt on the window

Since the UVtron operates at high voltage, static electricity causes dust to build up on the surface of the glass bulb. This

invites lowering of the ultraviolet transmissivity and sensitivity of the UVtron, so periodic maintenance, such as wiping off

with gauze dipped in alcohol, is necessary.

GSoldering

For mounting the UVtron on a printed circuit board, solder it quickly (350 °C for less than 5 seconds). If the leads are

heated excessively, the glass can crack or the characteristics of the UVtron deteriorate. After soldering, wipe away the

solder flux with alcohol or a similar agent. If the leads are left dirty, current leak due to humidity will lower the voltage

applied to the UVtron socket available from HAMAMATSU.

GVibration and shock

UVtrons have passed vibration and shock tests in compliance with JIS C 60068-2-6 (sinusoidal vibration test - R9454,

R9533: 3.0 mm peak to peak, 200 m/s2, 10 Hz to 2000 Hz; other types: 1.5 mm peak to peak, 100 m/s2, 10 Hz to 500 Hz)

and JIS C 60068-2-27 (shock test - R9454, R9533: 10000 m/s2, 1 ms; other types: 1000 m/s2, 11 ms). However Cif

subjected to strong mechanical shocks such as drop impacts, the glass envelope may crack or internal electrodes may

deform resulting in poor electrical characteristics. So use extreme caution when handling the UVtron.

GPolarity

Connect the UVtron with correct polarity. Reverse polarity connection will cause malfunction or breakdown.

IWARRANTY

The UV TRON is covered by a warranty for a period of one year after delivery. The warranty is limited to replacement of any

defective tube due to defects traceable to the manufacturer.

WEB SITE www.hamamatsu.com

HAMAMATSU PHOTONICS K.K., Electron Tube Division

314-5, Shimokanzo, Iwata City, Shizuoka Pref., 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205

U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 E-mail: usa@hamamatsu.com

Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: info@hamamatsu.de

France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00, Fax: (33)1 69 53 71 10 E-mail: infos@hamamatsu.fr

United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: 44-(0)1707-294888, Fax: 44(0)1707-325777 E-mail: info@hamamatsu.co.uk

North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171-41 SOLNA, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: info@hamamatsu.se

Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741 E-mail: info@hamamatsu.it

TPT 1021E02

MAY 2007. IP

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