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MODEL 8700

X-RAY PULSE COUNTER / EXPOSURE TIME METER

INSTRUCTION MANUAL

TABLE OF CONTENTS

OVERVIEW

2

DESCRIPTION

2

GENERAL INSTRUCTIONS

3

BATTERY REPLACEMENT

5

WARRANTY

5

CALIBRATION

5

SERVICE INFORMATION

5

EXPOSURE TIME CONVERSION CHART

6

SPECIFICATIONS

7

APPENDIX

8

db:\8700c\manual_8700c

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Содержание 8700

Страница 1: ...E METER INSTRUCTION MANUAL TABLE OF CONTENTS OVERVIEW 2 DESCRIPTION 2 GENERAL INSTRUCTIONS 3 BATTERY REPLACEMENT 5 WARRANTY 5 CALIBRATION 5 SERVICE INFORMATION 5 EXPOSURE TIME CONVERSION CHART 6 SPECIFICATIONS 7 APPENDIX 8 db 8700c manual_8700c ...

Страница 2: ... count the number of x ray pulses produced by half wave and full wave recti fied machines It will count the output pulses typically 60 pulses per second for half wave rectified machines or 120 pulses per second for full wave Dental x ray machines are usually half wave rectified 2 To measure the exposure time of x ray pulses produced by half wave and full wave x rays This is a new function and is t...

Страница 3: ...instrument will measure the length of time that a DC or 3 phase AC x ray is on The display reading will be in milliseconds i e an exposure of 1 second will read 1000 an exposure of 2 10 second will read 200 This switch position can also be used for measuring the exposure time of pulsed x rays OFF All power to the instrument is disconnected in the OFF position Set the switch to OFF when not in use ...

Страница 4: ...vel radiation during the pre heat cycle The sensitive detection circuit will respond to this spurious radiation which should not be present If your measured exposure time is significantly higher than what is expected the instru ment could be responding to preheat emission To minimize the error from preheat ra diation increase the distance from the x ray source to the 8700 or put an aluminum fil te...

Страница 5: ... as soon as possible We suggest removing the battery when shipping the instrument or if it will not be used for a long period of time WARRANTY Electronic Control Concepts warrants the Model 8700 X ray Timer Counter from defects in materials and workmanship for a period of two years There is no warranty on the battery ECC will replace or repair any Model 8700 during the first two years after shipme...

Страница 6: ... 6 Page 6 Electronic Control Concepts 160 Partition Street Saugerties NY 12477 ...

Страница 7: ...9 40 0 67 0 8 0 33 45 0 75 0 9 0 38 50 0 83 1 0 42 60 1 1 2 0 5 70 1 17 1 4 0 58 80 1 33 1 6 0 67 90 1 5 1 8 0 75 100 1 67 2 0 83 120 2 2 4 1 150 2 5 3 1 25 180 3 3 6 1 5 200 3 33 4 1 67 240 4 4 8 2 60 Hz Line 50 Hz Line Full Wave USA Canada Europe 60 Hz The formulas for determining exposure time based on number of pulses is as follows Time in seconds pulses 60 for half wave x ray in USA or Canada...

Страница 8: ...lliseconds o 65 536 o 65 5 seconds Display 0 21 5 5mm Character height 2 lines by 12 Characters Liquid Crystal Power 9 Volt Battery Low Battery Indicator Low Battery Appears in display when battery voltage reaches 5 8 Volts 0 2 Volt Size 80 X 147 X 40 mm 3 15 X 5 8 X 1 6 inches Battery Life 48 Hours minimum o With Duracell MN1604 Alkaline or equivalent AC Input Jacks 130 Volts AC maximum 90 Volts ...

Страница 9: ...the number of pulses To convert to time in seconds refer to the Exposure Time Conversion Chart or use the formula Time pulses 60 in countries with 60 Hz power As shown the 8700 would count 6 pulses and the exposure time would be 6 60 0 1 second FULL WAVE This is typical of some older hospital x rays Switch the Model 8700 to PULSE The instrument will count and display the number of pulses To conver...

Страница 10: ...the x ray is set for 2 10 second the actual exposure time should be around 200 milliseconds It is important to note that the 8700 will end the count at the end of the x ray when the intensity drops below about 70 of the peak value This is done to ensure an accurate count when there is a tail at the end of the x ray i e the x ray intensity drops slowly If the Model 8700 is in PULSE mode and a measu...

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