Related Manuals for Amptec Research ATEQUIP 620MC
Summary of Contents for Amptec Research ATEQUIP 620MC
- Page 1 MODEL 620MC OPERATION/ MAINTENANCE MANUAL AMPTEC RESEARCH is an ISO 9001:2015 Certified Accredited Quality Management System Company Phone +1 (512) 858-4045 // Fax +1 (512) 858-4340 www.amptec.com // info@amptec.com REV. A...
- Page 2 TABLE OF CONTENTS SECTION A: RECEIVING AND INITIAL INSPECTION Introduction to the AMPTEC 620MC Receiving, Unpacking, and Initial Inspection AC Battery Charger- Power Requirements Setup and Use Serial Number, Revision and Safety Board Approvals SECTION B: 620MC IGNITER TESTER / 620A 4 FAILSAFE OHMMETER SPECIFICATIONS Table B-2.
- Page 3 SECTION E: THEORY OF OPERATION General Troubleshooting E-2-1 Localizing the problem E-2-2 Component Replacement Circuit Description Analog-to-Digital Converter E-4-1 Reference Voltage E-4-2 LED Display Ohms-to-DC Converter E-5-1 Constant Current Source E-5-2 Constant Current Circuit Operation Failsafe Design Ultra-Safe Power Supply Scheme Relay Board General Operation SECTION F: ROUTINE MAINTENANCE General...
- Page 4 "failsafe current" in a worst-case DO NOT return equipment component failure situation. The failsafe feature to AMPTEC RESEARCH or any of its sales is tested in every instrument before shipment. offices without first obtaining an RMA number (Return Material Authorization). We need to 620A- know who to contact and how to contact (i.e.
- Page 5 (4 D cells - 5.0 AHr). Replacement batteries may be purchased, contact the sale Although the batteries are fully charged prior to department at AMPTEC RESEARCH. shipment, it may be desirable to refresh the charge for 24 hours before use. As a rule of...
- Page 6 Additional note - Main switch Power “O . n” When This product is also the 620A Igniter Tester is first turned on, the unit certified for Use in Explosive Fuel Air Mixtures per briefly draws more internal power then cuts back Mil Standard 810 Method 511.
- Page 7 Weight ......4 lbs net; 6.5 lbs shipping (not counting transit case and accessories) AMPTEC RESEARCH continually strives to make improvements with it's instrumentation and as such reserves the right for general operation of its products and specifications to be subject to change on rare occasion...
- Page 8 SECTION C OPTIONAL ITEMS AND ACCESSORIES C-1. Available Accessories and Options Listed below are the options available for use with the Option “620RACK”: Rack Mount Adapter AMPTEC 620A Series FailSafe Ohmmeters. Option "620RACK" includes an adapter tray that Option 620-DC: Battery Charger allows any single AMPTEC 620 series tester to be flush panel mount installed in a standard 19"...
- Page 9 Option 300: 4-Wire Gold Plated Kelvin Lead Set Option 401: Handheld Single Probe Leads Option "401" is a gold plated 620 series compatible handheld probe (one black probe & one red probe ) lead set terminated in single points. The OP401 handheld probes allow for easy access to connector socket wiring (i.e.
- Page 10 SECTION D - OPERATION AND USE The AMPTEC 620A-4 ohms ranges are D-1. General Operation manually selected by pressing the desired range switch on the front panel. The range select This section contains operating instructions for the pushbutton for the AMPTEC 620A4 Explosive Safety Igniter Tester.
- Page 11 AMPTEC 620A-4 REAR PANEL configured with Option "232" , "247" (not part of NSN 6625-01-460-1499NM package) RS232C Interface FUSE - 2 ampere revision 2.0 3AG FAST BLO OP247 Adapter AMPTEC MADE IN USA RESEARCH www.amptec.com MODEL NUMBER 620A4 SERIAL NUMBER 620A4-1278 CAGE CODE 1CRL2 PHONE 800-350-5105...
- Page 12 LEAD RESISTANCE Charging Jack FAIL-SAFE OHMMETER The battery charging jack is a barrel type and is located on the 620A rear panel. The center pin of the connector is positive. The charging LIMITED IGNITER requirements of the internal battery pack are CONSTANT CURRENT 6VDC @300mA.
- Page 13 - trimpot RV3 is factory the ohmmeter. In this case, please contact adjusted to have the low battery indicator your local AMPTEC RESEARCH Sales come on at 4.50 VDC. To make this Office. adjustment, refer to Section F Routine Maintenance for further details.
- Page 14 Replacing the AMPTEC 620A-4 Handles Rotating the AMPTEC 620AInstrument Case and Handle Position The AMPTEC 620A-4 handle access screws are The AMPTEC 620A-4 handles position can be located behind the black circular end caps (see easily adjusted or rotated with the simple points A and B in the diagram below) at the joint maneuver described below.
- Page 15 General If the 620A-4R exhibits problems that cannot be eliminated by reviewing Chapters B and D, the The AMPTEC RESEARCH 620A-4R Igniter following guidelines have been established to Tester is shown in block diagram form in Figure help solve the problem.
- Page 16 When soldering, heat the PCB pad and the lead of the component, not the solder. After several seconds of the component lead in contact with the hot soldering iron apply solder smoothly and evenly onto the PCB pad and component lead not the soldering iron.
- Page 17 E-4. Analog to Digital Conversion E-3. Circuit Descriptions The A to D conversion is done with a ICL8068 The circuit descriptions which follow are /ICL71C03 chip set. The ICL8068 takes care of referenced to Figures E-1, E-2, E-3 and the the analog part and the ICL71C03 takes care of schematic diagrams at the back of this manual.
- Page 18 C INT R INT 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 INTEGRATOR COMPARATOR 1 µF ZERO CROSSING DETECTOR C REF C AZ C STRAY V IN POLARITY...
- Page 19 Detailed Description Analog Section E-4-1. Reference Voltage Figures E2 diagrams A thru D shows the The precision reference voltage required to do equivalent circuit of the analog section in 3 the A/D conversion is developed by IC201. The different phases of operation. The system will zener voltage is attenuated to approximately - perform conversions at a rate determined by the 0.5V .
- Page 20 E-5-2 Constant Current Circuit Operation igniter could not exceed safe limits, because the -5 volt and +5V supplies includes inherent Assume that terminals I and I of Figure E-3 current limiting. Because of the design of both supply isolation transformers T101 and T102, are shorted, and 1 volt is applied to E so that I the ±5 volt supplies can only deliver 20 to 25...
- Page 21 The 620A Tester measurement circuitry is also E-7 . Ultra-Safe Power Supply Scheme failsafe current limited, even under worst case component failure. A simple startup test The +5 volt power supply is provided directly procedure which also has the 620A Tester by the batteries (for driving the LED displays user perform a functional check using a and digital logic).
- Page 22 SEGMENT PIN A ....1 B ....13 C ....10 D ....8 E ....7 F ....2 G ....11 D.P. D.P....6 Common ..14 Figure E-4. LED Display Pin Functions E-8. Relay Board General Operation (Not for NSN 6625-01-460-1499NM meters) For products such as the ruggedized water-proof version AMPTEC 620A-4R Igniter Tester and remote controlled versions via the RS232C...
- Page 23 General This section of the manual contains routine Test Leads: maintenance information regarding the 4-wire lead set AMPTEC RESEARCH Model 620A Fail AMPTEC Option "300" or "301C") Safe Ohmmeters. Calibration should be performed on a regular basis to ensure F-3.
- Page 24 As with all batteries, replacement will eventually be necessary. Batteries may be ordered from AMPTEC RESEARCH as Option “620-BAT” for a set of 4 D cells (NiCAD). Battery Replacement Procedure (see steps below): Remove the four feet screws and the bottom cover.
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