Electro-Tech systems 406D Скачать руководство пользователя страница 35

 

34

 

APPENDIX C

 

(Applicable sections) 

 

Mil-PRF-81705D, – Barrier Materials, Flexible, Electrostatic Protective, Heat Sealable: 

 

1.0 Scope 

1.1 

This specification covers opaque and transparent heat sealable, electrostatic 
free, flexible, barrier materials for the packaging of missiles, explosive powered 
and electro-sensitive devices, micro-circuits, semiconductors, thin film resistors, 
and associated airborne components. 

Table 1: Electrostatic properties: 

 

 

The decay rate shall be 2.00 seconds (maximum) re: Paragraph 4.8.3. 

 

 

4.0 

Quality Assurance Provisions 

4.8.3. 

The tests indicated below shall be conducted in accordance with the specified 
methods of Fed. Test Method Std. 3010, Electrostatic Properties – Method 
4046 per Note 7. 

 

 

 

Note 7: Preparation of the test specimens shall be as follows: 

 

Five 3 by 5 inch specimens shall be selected from the material to be tested, one 
from each outside edge and one from the center. Six additional specimens shall
be cut from the same areas. Three shall be aged by exposing the specimen to 
a dry atmosphere at 160° F for 12 consecutive days. The remaining three shall 
be placed under a shower in a horizontal position for a minimum of 24 hours. 
All specimens shall then be placed in the drying chamber for 24 hours before 
testing. Report the average for the five specimens for As Received, Aged and 
After Shower Exposure to the nearest 0.01 second. 

 

 

Содержание 406D

Страница 1: ...STATIC DECAY METER Model 406D Operating Manual 1 13...

Страница 2: ...e and specified type such as normal blow time delay etc DO NOT use makeshift fuses or short the fuse holder This could cause a shock or fire hazard or severely damage the instrument POWER LINE VOLTAGE...

Страница 3: ...in the presence of flammable gases or fumes constitutes a definite safety hazard For equipment designed to operate in such environments the proper safety devices must be used such as dry air or inert...

Страница 4: ...PRF 81705D Barrier Materials Flexible Electrostatic Free Heat Sealable NFPA 99 is the test standard used for products used in the hospital operating room and for products used in hazardous environmen...

Страница 5: ...operator manually steps the unit through the test sequence by operating the unit s mode select buttons In the Automatic Mode the operator selects the number of tests to be performed up to 9 and the t...

Страница 6: ...N AUTO switch are indicated by panel markings above and or below each switch The state in the DOWN position button latched in is marked BELOW each switch When the POWER ON OFF button is UP the power i...

Страница 7: ...the automatic test sequence and reset the DECAY TIME and AUTO mode counters to zero 2 2 4 1 CHG This momentary push button switch when activated places the unit in the CHARGE state In this state the...

Страница 8: ...High Voltage Power Supply ON or OFF and determines the polarity The polarity buttons are dual function since they select the polarity of the charging voltage and turn the High Voltage Power Supply on...

Страница 9: ...s a convenient interval time for most testing During the interval time the DECAY TIME display will hold and display the decay time of the last test and the AUTO mode counter will display the number of...

Страница 10: ...illuminated automatically when a test has been completed and the CUTOFF threshold reached In the AUTO mode only the ZERO STBY and CHG indicators are controlled by the operator depressing the correspon...

Страница 11: ...settable fuses To reset turn off unit for at least 20 seconds then turn back on If the system still does not operate contact ETS at 215 887 2196 for service Figure 2 4 1 Rear Panel Ser 877 forward 2 4...

Страница 12: ...ctual discharge waveform will be displayed which begins with the second pulse The first pulse is the sensor self zero that is activated when the decay measurements begins The output level is an invert...

Страница 13: ...test samples 3 0 OPERATION 3 1 Initial Set Up 1 Before connecting the Static Decay Meter to the AC line the four cables from the Faraday Cage must be connected to the Control Unit as shown in Figure...

Страница 14: ...nt or tamper with the interlock system in any way NOTE For systems with Serial 877 and higher disregard this section Unless specifically requested the unit is set for 115 VAC operation If operation fr...

Страница 15: ...will produce a full scale reading on the SAMPLE CHARGE meter NOTE There is an approximate 2 second delay after a polarity button has been depressed before the CHARGING VOLTAGE meter will read This is...

Страница 16: ...nt cycles automatically including automatic zero calibration This mode cannot be used with samples that have an initial or a residual charge 3 3 1 Initial Set Up Follow the procedures outlined in Sect...

Страница 17: ...l In the TEST state the Decay Time readout will be counting and the SAMPLE CHARGE meter reading will be decreasing toward zero The CHARGING VOLTAGE meter will read zero the HIGH VOLTAGE ON light will...

Страница 18: ...d as a High Voltage ON OFF switch The HIGH VOLTAGE OFF button should be depressed whenever the Faraday Cage cover is lifted or when tests are not being conducted 3 3 4 STM System Performance Check To...

Страница 19: ...s the case refer contact ETS for assistance 3 3 4 2 STM 2 Systems with Serial 878 or higher The STM 2 does not incorporate the banana plug Install the STM 2 directly into the electrodes in the Faraday...

Страница 20: ...ld in place with the magnetic electrodes Using the clamp electrodes will result in a reading approximately 0 03 seconds lower This is due to the electrode effect described in Section 4 5 If the DECAY...

Страница 21: ...the electrode points and rest on the shoulder as shown in Figure 3 4 3 This is necessary in order to make contact with the outer surface of the chip so that surface treated material will be properly...

Страница 22: ...ple and bring it within view of the sensor To install first remove the magnetic or clamp electrodes if installed Place the 25 6mm slots over the threaded rods and secure with the thumbscrews or wing n...

Страница 23: ...d in the same manner as the standard Faraday Cage except instead of clamping the sample to the electrodes the entire electrode assembly is placed onto the test surface Conductive rubber is used for th...

Страница 24: ...d plug the cables from the Model 806B into the corresponding connectors Place the Model 806B on a metal plate and adjust the FULL SCALE Adjust until the voltage on the SAMPLE CHARGE meter corresponds...

Страница 25: ...when an antistatic additive blossoms to the surface of a material over a period of time The following are some hints and additional test procedures that will help to understand the many factors affect...

Страница 26: ...the test electrodes If the entire sample is insulative then when 5kV is applied the sample will not conduct a charge and when the sample is grounded depress TEST button the sample will not bleed off...

Страница 27: ...rodes and discharge circuit is 50pF The discharge circuit incorporates a 10 MegOhm resistor that limits the fastest decay time to 1 to 1 25 milliseconds The relay switching time is approximately 3 mil...

Страница 28: ...collapses and the SAMPLE CHARGE meter drops instantly to some voltage slightly above the 1 cutoff level typically about 1 200V In this case the clock will continue to run Note The amount of accepted c...

Страница 29: ...Faraday Cage Retighten the retaining clamp screw When testing static dissipative or conductive composite or laminated films use a known good sample to adjust the full scale using the adjust control if...

Страница 30: ...replace or repair is the only warranty either expressed or implied or provided by law and is in lieu of all other warranties The Seller denies any other promise guarantee or warranty with respect to t...

Страница 31: ...trometer for measuring volts amperes and ohms with a full scale reading of 0 01 0 1 10 and 100 or an oscilloscope with a response of 1 microsecond per division or equivalent 3 4 Electrostatic test cha...

Страница 32: ...ed in the operations manual for the particular item 6 1 2 Set multiplier switch of the electrometer at 10 and the operate switch at zero check 6 1 3 Close the ground switch and adjust the high voltage...

Страница 33: ...eed of the chart known calculate the decay time for each specimen 7 0 Report 7 1 Report the facts pertinent to the test 7 1 1 State that the test was conducted in accordance with this procedure or des...

Страница 34: ...and tested at 50 2 RH at 70 3 5 F 1 Method 4046 of Federal Test Method Standard 101C After the specimen has received its maximum charge from the application of 5000 volts the time for the indicated sp...

Страница 35: ...onducted in accordance with the specified methods of Fed Test Method Std 3010 Electrostatic Properties Method 4046 per Note 7 Note 7 Preparation of the test specimens shall be as follows Five 3 by 5 i...

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