B&K 1621 Скачать руководство пользователя

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Содержание 1621

Страница 1: ...z with a continuously vari able tuned frequency Powered from inter nal batteries or an external DC voltage Suited for use with B K Sound Level Me ters Types 2203 2209 2210 and 2218 B K Vibration Meter...

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Страница 3: ...TUNABLE BAND PASS FILTER TYPE 1621 Applicable to instruments with serial numbers from 6941 24 Revision September 1981...

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Страница 5: ...y charger Type ZG 0199 9 Mains power supply Type 2805 9 External DC supply 10 3 3 MANUAL OPERATION WITH SOUND LEVEL AND VIBRATION METER ETC 11 3 4 AUTOMATIC OPERATION WITH LEVEL RECORDERS TYPES 2306 A...

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Страница 7: ...1 Overload Power Filter Frequency Tuning On 12 Frequency Range 20 200 14 2 2 0 2 2 2k 20k Hz Manual Auto e Start Briiei Kjaar band frequency analysis of sound and vibration Its light weight and batter...

Страница 8: ...ich can be obtained from a Battery Charger ZG 0133 a Power Supply ZG 0199 or a car battery When the ZG 0 113 or ZG 0199 is used the instrument can be operated and the batteries re charged at a reduced...

Страница 9: ...instru ment from internal and external power supplies FILTER SELECTOR Note It does not light when the instrument is powered from a 14 V DC source A 4 position rotary switch for switching the instrumen...

Страница 10: ...to select the method of tuning the filter with positions as follows Manual In this upper position the filter is tuned manually by the FREQUENCY TUNING KNOB Auto In this central position the filter is...

Страница 11: ...r sup ply A 2 position slide switch for selecting the maximum input voltage 0 2 V RMS and 1 V RMS are available A 7 pin DIN socket for accepting an external DC power supply voltage for powering the in...

Страница 12: ...quency to be swept by the Portable Level Recorder Type 2306 or 2309 synchronously with its re cording paper For details of connections synchronization sweep rate and operation see section 3 4 This ret...

Страница 13: ...ts own internal batteries it may also be driven from an external power supply The choice of power supply depends on whether it has to be capable of recharging the internal cells of the Filter and also...

Страница 14: ...te of the in strument off towards the rear The screw is captive so it cannot be lost 2 Place the cells in the compartments with the polarities indicated See Fig 3 1 3 Replace the top panel 4 Select In...

Страница 15: ...ry useful power supply With such a set up however a ground loop is formed by the 0 V line of the power supply and the sreening of the signal cables This may prove troublesome when measuring small vibr...

Страница 16: ...or external DC source connection to 1621 External view of socket soldering side of plug shown If recharging or powering of the 1621 is carried out in a car that has a positive earth system and the car...

Страница 17: ...order 2306 1 S y_nc_hr_o_nisa_t_io_n_____________ Tunable Band Pass Filter 1621 Level Recorder 2309 AO 0182 For 2306 with serial N below 718058 AO 0034 For 2306 with A00034 serial N above 718058 79077...

Страница 18: ...analysis can be made later if necessary to give improved resolution around those frequencies 3 4 AUTOMATIC OPERATION WITH LEVEL RECORDERS TYPE 2306 OR 2309 12 It is often a great advantage if a hard...

Страница 19: ...the pen deflection of the recorder see the 2306 or 2309 Instruction Man ual 8 Using the FREQUENCY RANGE SELECTOR of the 1621 choose the first decade of in terest for analysis 9 Adjust the position of...

Страница 20: ...wept the Level Recorder and the filter sweep will stop and the SWEEP CONTROL INDICATOR lamp will go out 13 Repeat steps 8 13 as necessary for the next decades of interest Synchronization will be maint...

Страница 21: ...621 4 1 FREQUENCY CHARACTERISTICS Fig 4 2 shows the two alternative bandwidth characteristics plotted on a 1 kHz centre frequency for convenience the filter shape however is constant right the way acr...

Страница 22: ...aracteristics of 1621 4 3 FILTER SWEEP RATE CONSIDERATIONS The rate at which the filter is swept by the 2306 I 2309 and the writing speed of the 2306 I 2309 will effect the accuracy of the analysis Th...

Страница 23: ...nown or if using Table 4 1 then locate the column corresponding to the value shown by the FREQUENCY RANGE button of the 1621 4 Set the WRITING SPEED and PAPER SPEED on the Level Recorder as indicated...

Страница 24: ...3 DC recording of a deterministic signal 3 bandwidth to give ripple of about 0 25 dB FREQUENCY RANGE setting Hz 200 2k 2k 20 k f or Lowest Analysis Frequency Hz 50 to 150 150 to 500 500 to 1 5k Above...

Страница 25: ...armonics will be included in a bandwidth and therefore it is recommended that the PAPER SPEED be held constant after being stepped up once for a 23 analysis and twice for a 3 analysis This pro cedure...

Страница 26: ...e trou ble free operation However if repair is necessary then consult the separate Service In struction Manual available for the 1621 or contact your local 8 K service representa tive Under no circums...

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Страница 28: ...o In 1 Cl o I _I o _ 0 0 c _ Bri iel Kjcer DK 2850 NIERUM DENMARK Telephone 452 8005oo Telex 37316 bruka dk Printed in Denmark by Naerum Offset...