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Summary of Contents for Amptec Research 620ES
- Page 1 Option "110" Test Lead Pouch 2.0 (I.9999) Ohms Fullscale with 0.1 milliohm (100 µ ) Resolution 620ES Safety Igniter Tester OPERATION/MAINTENANCE MANUAL 09JUNE2011 REV. E PHONE (512) 858-4045; FAX (512) 3858-4340; TOLL FREE IN USA 800-350-5105 website http://www.amptec.com...
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Page 2: Table Of Contents
TABLE OF CONTENTS _______________________________________________________________ CHAPTER A: RECEIVING AND INITIAL INSPECTION Introduction to the AMPTEC 620ES series Unpacking and Inspection AC Adaptor/ Battery Charger- Power Requirements Setup and Use CHAPTER B: 620ES FAILSAFE OHMMETER SPECIFICATIONS Table B-2. Specifications CHAPTER C: REPLACEMENT, OPTIONAL AND ACCESSORY ITEMS... - Page 3 Troubleshooting Circuit Descriptions Analog-to-Digital Converter Ohms-to-DC Converter Failsafe Design Ultra-Safe Power Supply Scheme Figure E-1. Model 620ES Block Diagram Figure E-1B Analog-to-Digital Converter Timing Diagram Figure E-2 Analog Section of IC1 and IC2 Figure E-3. Constant Current Source Diagram (Simplified) Figure E-4.
- Page 4 Some of the devices the verify conformance with its specifications. 620ES Igniter Tester may be used on include: fuses, squibs, igniters, explosive bolts, rocket motor squibs, automobile air-bag initiators and R M A many others.
- Page 5 A fully charged battery pack typically powers A-3. AC/DC Battery Charger - Power the 620ES for approximately 6 ~ 8 hours before Requirements requiring a recharge. AMPTEC installs a quality The AMPTEC 620ES is powered by an internal set of 4 each Heavy Duty (5000 mAHr) Ni-Cad rechargeable heavy-duty nickel-cadmium battery batteries.
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Page 6: Setup And Use
When the 620ES is first turned on, the unit draws more internal power to heat up the unit’s ovenized zener voltage reference. If the “Low Battery” Indicator only comes on for a few (i.e 10 to 15 seconds) seconds when the 620ES is... - Page 7 CHAPTER B - 620ES EXPLOSIVE SAFETY IGNITER TESTER - SPECIFICATIONS ______________________________________________________________ 620ES Resistance Range/Resolution 620ES Nominal Test Current/Failsafe Current Levels Actual fail-safe currents vary with each instrument and may be ±20% from the typical value. Table B-2. Specifications (for 1 year @25°C ± 10°C) Accuracy: 2.0 ohm range .
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Page 8: Available Accessories And Options
SECTION C OPTIONAL ITEMS AND ACCESSORIES C-1. Available Accessories and Options Option RACK: Rack Mount Adapter Listed below are the options available for use with Option "620RACK" includes an adapter tray that the AMPTEC 620A Series FailSafe Ohmmeters. allows any AMPTEC 620 series tester to be flush panel mount installed in a standard 19"... - Page 9 “300” is the recommended test lead set for any AMPTEC Igniter Testers with a 2.0 Ohm range Option “500” Optically Isolated Analog Output (i.e models 630ES and 620ES). The 4 wire Kelvin connection is important when measuring less than This rear panel mounted isolated analog DC Voltage 1.0 ohm, and also automatically eliminates test...
- Page 10 Functional Test Section - The optional 620ES Functional Test Box provides added measurement integrity using a milliammeter and test resistors to cross check the overall 620ES operation whenever desired. The test resistors are for cross checking 620ES basic operation and should not be used for calibration purposes. Simpson DC Milliammeter Range - 0-10 mA fullscale, Accuracy ±3%...
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Page 11: Chapter D: Operation, Function And Use
The AMPTEC 620 front panel need not be concerned if the battery charging input posts also accept wires with spade lugs, adapter is plugged into the AMPTEC 620ES as it and or banana jacks. The 48” long dual banana is disconnected during any resistance Alligator Test Leads plug directly into the measurements. - Page 12 KOhms (where E =10 ). 1.3700E+1 = 13.700 620ES will only charge when the power switch is in the Ohms (where E =10 ) "OFF" position. ( battery powered units only).
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Page 13: Connections
You can’t measure a current carrying leads. 1000 ohm resistor on the 200 ohm range of the 620ES. With one test lead (i.e. red banana lead ) Figure D-1 above illustrates the 4-wire principle plugged into the selected test resistor panel jack eliminates lead, wire and contact resistances as and the other test lead (i.e. - Page 14 2 wire resistance mode. high and I high) if using dual banana jacks. All AMPTEC 620ES Kelvin leads have the 4 wire Resistance Offset in 2 Wire mode current high, current low as well as the voltage...
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Page 15: Failsafe Operation
“main power” switch (see item 12 of the Front Panel Diagram) must be in the For the 620ES Explosive Safety Tester the normal OFF/CHARGING position in order to charge or typical operating current level is less than 10 the batteries. -
Page 16: Battery Monitoring Circuitry
620ES operation whenever D-6. Battery Monitoring Circuitry desired. The test resistors are for cross checking 620ES basic operation and should not be used for MILLAMPERES calibration purposes. The 620 series igniter tester display has a ±... -
Page 17: Chapter E General Operation And Design
620ES Tester and it’s cus- range only?". If the 620ES Tester does not tomer service department can also provide... - Page 18 - i.e. connect to an earth ground to avoid a static discharge to a static sensitive component. Handle all 620ES internal components as if they are static sensitive if you are not sure.
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Page 19: Circuit Descriptions
MULTIPLEXER INPUT INTEG BUFFER SWITCH COUNTERS CONTROL LOGIC COMPARATOR ZERO CROSSING DETECTOR Figure E1 - AMPTEC 620ES FUNCTIONAL BLOCK DIAGRAM COUNTS PHASE III PHASE I PHASE II I0.00 I I0.000 20.00 I 4 ½ DIGIT ZERO CROSSING POLARITY OCCURS DETECTED... - Page 20 C INT R INT BUFFER BUFFER INTEGRATOR COMPARATOR 1 µF ZERO CROSSING DETECTOR C REF C AZ C STRAY V IN FIGURE E-2A. PHASE l AUTO-ZERO C INT R INT BUFFER BUFFER INTEGRATOR COMPARATOR 1 µF ZERO CROSSING DETECTOR C REF C AZ C STRAY V IN...
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Page 21: Ohms-To-Dc Converter
3 closes a loop around the integrator and BCD data is converted to seven segment format comparator, the purpose of which is to charge by IC4. When the 620ES electronics are in open the Auto-Zero capacitor until the integrator circuit or over-range mode the display flashes output dose not change with time. -
Page 22: Failsafe Design
(15mA) max E-6. Failsafe Design The AMPTEC 620ES Tester is powered by a Reference to the AMPTEC 620ESTester Igniter rechargeable internal battery pack and cannot be Tester schematic will show that the output of... -
Page 23: E-7 . Ultra-Safe Power Supply Scheme
Failsafe level. For the 620ES Tester the normal or typical operating current level is less than 10 mA, and <15mA on as a Failsafe Level . E-7 . Ultra-Safe Power Supply Scheme... -
Page 24: General
The recommended higher ranges) calibration interval is 1 year. 1. Select the 20 ohm range. Connect the Kelvin The AMPTEC 620ES igniter tester is a four leads to the 0.1 ohm standard resistor. wire Kelvin ohmmeter. The AMPTEC 620ES Igniter Tester must be calibrated using four 2. -
Page 25: Battery Replacement Instructions
Re-secure the lid screw in the feet. 4) Secure the new batteries in place by re- connecting the battery retaining plate. 5) Replace the 620ES Igniter Tester front panel top plate and re-tighten the calibration access screws, taking care not to pinch any wiring.
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