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PHONE (512) 858-4045; FAX +01 (512) 858-4540; TOLL FREE IN USA 800-430-5440

website http://www.amptec.com

640N WATER-RESISTANT
IGNITER TESTER

OPERATION /MAINTENANCE MANUAL

2000

200 K

2.0 M

1.5 µA

.15 µA

150 µA

8 mA

1.0 M OHM

1.9 M OHM

640N

Содержание 640N

Страница 1: ...5 FAX 01 512 858 4540 TOLL FREE IN USA 800 430 5440 website http www amptec com 640N WATER RESISTANT IGNITER TESTER OPERATION MAINTENANCE MANUAL 2000 W 20 W 200 KW 2 0 MW 1 5 A 15 A 150 A 8 mA 1 0 M O...

Страница 2: ...A 5 Setup and Use CHAPTER B 640N FAILSAFE OHMMETER SPECIFICATIONS Table B 2 Specifications CHAPTER C REPLACEMENT OPTIONAL ANDACCESSORYITEMS C 1 Available Accessories and Options C 2 Test Lead Sets CH...

Страница 3: ...er Supply Scheme Figure E 1 Model 640N 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 Simplifi...

Страница 4: ...each a low charge level a negative sign will apear on the display The 640N has a battery monitoring circuit that indicates it is time to plug in the battery charger A 2 Receiving Unpacking and Initial...

Страница 5: ...640N has a way to remove it s lid completely for example when used in an indoor laboratory environment With the 640N open remove the units two hinge pins hex type by twisting them The lid should come...

Страница 6: ...or the 640N is not in use As mentioned earlier of course the AC DC Battery Charger must be plugged into the 640N s notched connector to facilitate charging the batteries As mentioned earlier of course...

Страница 7: ...able Instrument Display 20 000 count 4 digit Super Bright Light Emitting Diodes LED Over Range Indication select next higher range 640N Display flashes Measurement Update Rate Approximately 300ms 3 pe...

Страница 8: ...rge level inspector signature along with the inspection date C 2 Test Lead and Connector Sets Option 640 400 4 Wire Kelvin Lead Set Option 640 400 is the recommended Kelvin four wire lead set for the...

Страница 9: ...of the probe eliminating most cable resistance effects Option 640 401 handheld probes may be used where a single probe tip is a must i e probing into ordnance connector sockets or difficult to connec...

Страница 10: ...bration Access Screws Function Test Section Around the perimeter of the 640N front panel you will note there are 10 screws philips head type that are used for calibration access These screws are meant...

Страница 11: ...ion Do not attempt to repair the 640N unless you are qualified Do not attempt to calibrate the 640N unless you are qualified D 3 AMPTEC 640N Front Panel Diagram 1 Calibration Maintenance access screws...

Страница 12: ...alog milliammeter for checking the lower end or near zero accuracy of the 20 ohm range for checking the midscale functionality of the 20 ohm range for checking the midscale functionality of the 2000 o...

Страница 13: ...ct resistances as potential error sources The internal constant current source inherently overcomes all series resistance within compliance voltage limits and delivers a precise constant current Separ...

Страница 14: ...be calculated via subtraction of the 2 wire harness offset should not be mistaken for a fault in the instrument HI HI That is the 2 wire lead length shorted offset resistance without the squib resist...

Страница 15: ...t panel connector safety feature helps eliminate virtually any possibility of the operator measuring with the 640 series igniter tester test leads while also connected to an AC line powered battery ch...

Страница 16: ...n display does not come on and the If the 640N exhibits problems that cannot be eliminated by reviewing Chapters B and D the following guidelines have been established to help solve the problem Chapte...

Страница 17: ...d not the soldering iron Do not touch or move the replacement part until the solder has cooled Cold solder and bad solder joints can cause more problems Use the chassis ground connect to the common te...

Страница 18: ...lowing descriptions references to integrated circuits are given in the form IC201 1 which refers to Integrated Circuit 201 pin 1 E 4 Analog to Digital Conversion The A to D conversion is done with a I...

Страница 19: ......

Страница 20: ...in Phase I The time or number of counts required to do this is proportional to the input voltage IN IN E 4 1 Reference Voltage E 4 2 LED Display E 5 Ohms To DC Converter E 5 1 Constant Current Source...

Страница 21: ...across R218 D202 the range resistor and R D203 however acts as a 1 6 volt zener diode limiting the voltage that can appear across these components Even if every component in the amplifier circuit sho...

Страница 22: ...rent level even getting close to the Failsafe level E 7 Ultrasafe Power Supply Scheme The 5 volt power supply is provided directly by the batteries for driving the LED displays and digital logic The 5...

Страница 23: ...latch that will latch its output to the corresponding range push button input Its output turns on the front panel LED acts as an range mode indicator LED and a corresponding relay that connects to the...

Страница 24: ...with a low 2 0 Ohm range Contact AMPTEC for information on the OP400 300 48 long 4 wire Kelvin Calibration Lead Set all terminated with single banana jacks The 640 series igniter tester must be calib...

Страница 25: ...panel i Use caution when lifting the 640 top panel up by the handles 2 3 F 4 Battery Replacement Instructions 1 2 Adjust RV1 for a display indication of 1000 00 Check the 200 KOhm range with the 100 K...

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