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Summary of Contents for Amptec Research 620LK
- Page 1 AMPTEC RESEARCH MODEL 620LK OPERATION AND MAINTENANCE MANUAL 13231 Rooster Springs Rd. Austin, TX 78737 amptec.com T: (512) 858-4045 E: info@amptec.com...
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Page 2: Table Of Contents
620LK Operation and Maintenance Manual – Rev. J – Updated January 2020 TABLE OF CONTENTS SECTION A: RECEIVING AND INITIAL INSPECTION A-1 Introduction to AMPTEC 620LK Bonding Milliohmmeter p. 3 A-2 Unpacking and Inspection p. 3 A-3 Setup and Preparation for Use p. -
Page 3: Section A: Receiving And Initial Inspection
Class 1, Division 1, Groups A, B, C, and D locations for ambient temperatures from -20° C to 50° C (T3 zones). The AMPTEC 620LK meter is also MIL. STD. 810 MTD. 511 approved for use in explosive and volatile atmospheres. -
Page 4: Setup And Preparation For Use
For a more detailed instructional information on how to use the 620LK meter, see section D-4 on page 11. The 620LK meter may be used in any area where the environment does not exceed the specifications listed in section B on page 5. When possible, avoid exposing the meter to extremes of temperature, which will affect accuracy and shorten battery life. -
Page 5: Section B: 620Lk Specifications
620LK Operation and Maintenance Manual – Rev. J – Updated January 2020 SECTION B: 620LK SPECIFICATIONS B-1 Specifications for AMPTEC 620LK Bonding Milliohmmeter Resistance Range/Resolution/Accuracy: RANGE 200 mΩ 2 Ω NOMINAL CURRENT 100 mA 100 mA RESOLUTION 0.01 mΩ 0.1 mΩ... -
Page 6: Section C: 620Lk Compatible Accessory Items
620LK Operation and Maintenance Manual – Rev. J – Updated January 2020 SECTION C: 620LK COMPATIBLE ACCESSORY ITEMS C-1 Available Accessories and Test Leads* 620LK Product Packages: 620LK COMMERCIAL AIR PKG: Includes meter, case (630-100), and probes (630-406S) 620LK LM PKG: Includes meter, case (630-100), leads (630-405S), leads... -
Page 7: Section D: Operation, Function, And Use
At this point, the 620LK meter should start updating the LCD screen once an electrical connection has been made. After approximately 3 seconds, the meter will produce a beeping sound, and the backlight will turn on to illuminate the LCD screen. -
Page 8: D-2.2 Connections And 4 Wire Kelvin Information
The 620LK keyed access connector also makes it virtually impossible during normal operation to incorrectly connect lead/probe sets. The 620LK meter measures DC resistance with a 4-Wire Kelvin, or 4 terminal ohms, technique. Fundamentally, the 4-Wire Kelvin resistance method avoids measurement errors induced from the resistance of the test lead/probes and the contact resistance of the lead/probes to the device under test. -
Page 9: D-2.3 Main Power Switch
Under the rubber boot, there is a rubber o-ring for added weather resistance. The 620LK meter is set to automatically turn itself off after 5 minutes of no use in order to preserve battery life. Contact AMPTEC if you would like to have this feature deactivated. - Page 10 620LK Operation and Maintenance Manual – Rev. J – Updated January 2020 This autolock feature within the meter works by taking 16 resistance measurements in the positive polarity and averaging them. Another 16 resistance measurements are then taken in the negative polarity and averaged. The two averaged values from the positive and negative polarities are then averaged together to produce the final autolocked measurement, which is the reading displayed while the backlight is on.
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Page 11: 620Lk Padded Carrying Case Photo And Information
D-4 Detailed Use Description The below provides a detailed description on the best way to use the 620LK meter for bond measurements. Starting out, the Kelvin probes should not be touching a conductor - the meter is open circuit and the display indicates "1- - - -". - Page 12 620LK Operation and Maintenance Manual – Rev. J – Updated January 2020 probes for 3 to 5 seconds. The meter has 2 resistance ranges (a 199.99 mΩ range and a 1.9999 Ω range) and needs a little settling time to automatically determine which range is best before displaying the calculated bond value.
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Page 13: Section E: Maintenance, Repair, And Calibration
SECTION E: MAINTENANCE, REPAIR, AND CALIBRATION E-1 General Maintenance, Repair, and Calibration Information The AMPTEC 620LK meter was designed with the intent of using high quality, strong, and reliable components both internally and externally. As a result, the unit is extremely reliable and rarely requires repair. -
Page 14: Block Diagram And Circuit Description
The 1.9999 Ω range outputs a constant 100 mA DC level of test current. On a 1 Ω resistor, the 620LK 100mA output should get a 100mV drop (0.10V/0.10A). For DVM scaling on the 2 Ω range, voltage drop is amplified using a x10 (for range scaling), hence a 10 mV drop becomes 100mV. -
Page 15: E-6.1 Current Source Pcb Diagnostic Test Routine
E-7 620LK Calibration Procedure The 620LK’s rear panel calibration sticker must be removed to access the two adjustment potentiometers located on the DVM PCB. Please note that if the tamper- proof calibration sticker is removed, this voids the product’s calibration and warranty. -
Page 16: E-7.1 Recommended Calibration Standards
E-7.1 Recommended Calibration Standards We recommend using our 630-304 4-Wire banana jack test lead set to calibrate the 620LK meter. If you are interested in purchasing a set of these leads, please contact AMPTEC. If you need to purchase resistance standards, we recommend using a reputable manufacturer and insuring that all standards are N.I.S.T. -
Page 17: Battery Compartment Design And Description
620LK Operation and Maintenance Manual – Rev. J – Updated January 2020 The following procedure can be performed to remove the PCB from the 620LK meter: 1) Use a Philips screwdriver to remove the 620LK’s 4 front panel screws located in the corners. -
Page 18: Section F: Safety Approvals And Classifications
620LK Operation and Maintenance Manual – Rev. J – Updated January 2020 SECTION F: SAFETY APPROVALS AND CLASSIFICATIONS F-1 UL-913 Intrinsically Safe Certification The AMPTEC 620LK meter is independently UL- 913 approved as an intrinsically safe apparatus for use in Class 1, 2, 3, and 4, Division 1, Groups A, B, C, and D locations from temperatures -20°... -
Page 19: Section G: Revision History And Manual Notes
620LK Operation and Maintenance Manual – Rev. J – Updated January 2020 SECTION G: REVISION HISTORY AND MANUAL NOTES G-1 Manual Revision History The below table details changes made over time to this manual. Revision Name Date Description Revision history table added, manual notes added, Rev.
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