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Download 630ES Checkout Routine (PART 2)
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20 Ohm Range Checkout 1. Next press the 20 ohm range switch, you should see the 20 ohm range indicator LED illuminate. The 20 ohm range switch Red / High banana lead Black / Low banana lead RESISTANCE 4 2 6 8 MILLIAMPERES 10 } To "CONNECTIONS" port 2. Plug the red banana jack lead into the 10 Ohm reference resistor. 3. The meter's display should read about or approx. 10 ohms (again maybe 9.985 ohms or even 10.015 ohms). If the 10 ohm reference resistor check looks "OK" then the 20 ohm range is good. 10 ohm resistor 1 OHM 190K OHM I0.008 digital reading (around 10 ohms) 200 Ohm Mid-Scale Range Check Red / High banana lead Black / Low banana lead 1. Next press the 200 ohm range switch, you should see the 200 ohm range indicator LED illuminate. The 200 ohm range switch 4 2 8 10 RESISTANCE 6 MILLIAMPERES } To "CONNECTIONS" port 100 ohm resistor 2. Plug the red banana jack lead into the 100 Ohm reference resistor. 3. The meter's display should read about or approx. 100 ohms (again maybe 99.85 ohms or even as high 100.28 ohms). If the 100 ohm (reference resistor) check looks "OK" then the 200 ohm range is good. 1 OHM 190K OHM meter's digital reading (around 100 ohms) 200 KOhm Midscale Range Check 1. Next press the 200 Kohm range switch, you should see the 200 ohm range indicator LED illuminate. Black / Low banana lead Red / High banana lead The 200 KOhm range switch RESISTANCE 4 2 6 8 MILLIAMPERES 10 } To "CONNECTIONS" port 2. Plug the red banana jack lead into the 100 KOhm reference resistor. 3. The meter's display should read about or approx. 100 Kohms (again maybe 99.85 KOhms or as high as 100.28 Kohms is fine). If the 100 Kohm (reference resistor) check looks "OK" then the 200 Kohm range is good to mid-scale is "OK". 100 KOhm resistor 1 OHM 190K OHM meter's digital reading (around 100 KOhms) 200 Kohm FullScale Range Check 4 2 6 8 MILLIAMPERES 10 } 1. Next press the 200 Kohm range switch, you should see the 200 ohm range indicator LED illuminate. 2. Plug the red banana jack lead into the 100 KOhm reference resistor. 3. The meter's display should read about or approx. 100 Kohms (again maybe 99.85 KOhms or as high as 100.28 Kohms is fine). If the 100 Kohm (reference resistor) mid-scale check looks "OK" then the 200 Kohm range is good to mid-scale is "OK". Black / Low banana lead Red / High banana lead To "CONNECTIONS" port 190 KOhm resistor 1 OHM 190K OHM meter's digital reading (around 190 KOhms) A 4-WIRE KELVIN RESISTANCE MEASUREMENT The AMPTEC 630ES measures DC resistance with a 4 Wire Kelvin technique. Two of the wires Current high and Current Low pass through the resistance under test in a current loop - as part of a failsafe constant current source with only 5 mA in the current loop. It doesn't matter if the test leads are longer with more in-series resistance or even if there is some contact resistance with the connection to the resistance under test, because the constant current source's compliance voltage works to maintain a constant 5 mA (on the 2.0 ohm range) flowing in the loop. The other 2 wires (Voltage high and Voltage low) sense the voltage drop across the "resistance under test" (i.e. a squib). No measurement error in the voltage leads - The voltage measurement is high impedance – This means,virtually no current is drawn in the voltage sense lead wires. With "virtually no current drawn, in the lead wires there is virtually "No voltage drop or No Voltage Drop error in the voltage sense wires. Conclusion – With 4 Wire Kelvin, long distance test leads do not create a measurement error as long as you have compliance voltage drive remaining in the constant current loop. If test resistance is too high for the range, the 630ES display flashes "Overrange" meaning out of compliance voltage. A M i l i t a r i z e d S t y l e f o r K e l v i n T e s t L e a d C o n n e c t i o n s J1 - Main 630ES Front Panel Connector AMPTEC 630 and 640 series A= I High B= V High J1 Main “Connections” Jack C= V Low G D= I Low E= F= Ground (-) G= Faraday Cage Shield H= +5 V A H B C E D F G H A F B E C CONNECTIONS D TEST LEADS OR BATTERY CHARGER A= I High B= V High C= V Low D= I Low G=Chassis Ground 4-Wire Kelvin Clip Insulating Spool between the upper and lower jaw Option "630-304" Gold 4-Wire Kelvin Banana Jack Test Lead Set ( twin single banana jack version also available) This 630ES User Instruction Card – found in the lid of the unit ( www.amptec.com) AMPTEC 630ES EXPLOSIVE SAFETY IGNITER TESTER To remove the lid Slide out the hinge pins AM P TEC RESEARCH EXPLOSIVE SAFETY IGNITER TESTER 9 630ES - I9999 RESISTANCE 2W 20 W 9 200 W 200K W 8 1 OHM 190K OHM AMPTEC 630ES FEATURES 1. Calibration/Maintenance access screws 2. Purge Valve - Provides Air Pressure Equalization to open. If unit will not open (i.e. after transit) due to an air pressure change, open purge valve to equalize pressure. 3. Handles - see item #1 then lift for calibration access 4. Single Access Multi-purpose Main Connector - for either measuring test lead hookup or connection to battery charger. The power switch (item #21) must be in “ Off/Charging mode” while the battery charger is connected to recharge the batteries. 5. Milliammeter - measures actual 630ES test current levels. 6. Minus sign - indicates “low battery level” recharge tim e 7. Fuse Access - 2 ampere fast blow type for general operation, check fuse if unit is non-operational. ( 2AG FAST BLOW) 8. Zero pot - Adjusts shorted resistance offset (i.e test leads). 9. Keylock Switch - Safe mode shorts inputs together, disconnects & isolates user inputs from 630ES measurement electronics. Measure mode switches user inputs to ohmmeter. 10. Input jack - Plug into the 630ES Ohmmeter meter test lead 11. Input jack of 0.1 ohm test resistor for checking the lower end of scale or zero accuracy of the 2 ohm & 20 ohm range. 12. 1 ohm test resistor for checking the mid-scale functionality of the 2 ohm range. 13. 10 ohm test resistors for checking the mid-scale functionality of the 20 ohm range of the 630ES. 14. Input jack for the 630ES common test lead (plug-in black banana jack)- also accesses the “shield” of the Faraday Cage. 15 and 16. 100 ohm, and 100K ohm test resistors for checking the mid-scale functionality of the 200 ohm and 200 K ohm ranges of the 630ES. 17. 190K ohm test resistor - if shunted in parallel during an ”Open Circuit” test on 200K ohm range, a shift <40 counts means resistance under test is > 200 Megohms (see manual). 18. O-ring seal(s) in 630ES lid & under the front plate provide Water Resistant seals, re-seat seal if loose. 19. Tight Squeeze Flip Latch Area - waterproof seal when closed, press down lid with palm and flip latch to open unit. 20. Resistance Ranges - 2 W , 20W , 200W , and 200KW silicone boot provides water-resistance switch cover ( LED indicates the selected range). 21. Power On or OFF/Charging Switch 22. Beveled Display Hood and Super Bright LED Display readable in sunlight. 23. Test Leads wrap around inside rim of 630ES lid, with Velcrotm style hook and loop fastening. Conclusion – After verifying the 200 Kohm range of the meter is "OK" the 630ES is ready to safely measure the resistance of squibs, explosive bolts and a variety of EEDs (electroexplosive devices. Do not forget the website for tech support www.amptec.com/tech.htm The password protected tech library offers a variety of 630ES support related technical documents, manuals, schematics and more . . . THE END