620LK Operation and Maintenance Manual – Rev. J – Updated January 2020
Page 2
13231 Rooster Springs Rd.
Austin, TX 78737
T:
(512) 858-4045
E:
info@amptec.com
amptec.com
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. 4
SECTION B: 620LK SPECIFICATIONS
B-1 Specifications for AMPTEC 620LK Bonding Milliohmmeter
p. 5
SECTION C: 620LK COMPATIBLE ACCESSORY ITEMS
C-1 Available Accessories and Test Leads
p. 6
SECTION D: OPERATION, FUNCTION, AND USE
D-1 General Use
p. 7
D-2 Front Panel
p. 7
D-2.1 Test Leads and Chassis Ground Connector
p. 7
D-2.2 Connections and 4 Wire Kelvin Information
p. 8
D-2.3 Main Power Switch
p. 8
D-2.4 Display and Backlight
p. 9
D-2.5 Resistance Range
p. 9
D-2.6 Low Battery Display Indicator
p. 9
D-2.7 Autolock Feature Information
p. 9
D-3 620LK Padded Carrying Case Photo and Information
p. 11
D-4 Detailed Use Description
p. 11
SECTION E: MAINTENANCE, REPAIR, AND CALIBRATION
E-1 General Maintenance, Repair, Calibration Information
p. 13
E-2 Returning the 620LK to AMPTEC for Maintenance, Repair, and Calibration
p. 13
E-3 Circuit Board Operation Overview
p. 13
E-4 Block Diagram and Circuit Description
p. 14
E-5 Principle of Operation
p. 14
E-6 Troubleshooting and Diagnostic Testing
p. 14
E-6.1 Current Source PCB Diagnostic Test Routine
p. 15
E-6.2 DVM PCB Diagnostic Test Routine
p. 15
E-7 620LK Calibration Adjustment Procedure
p. 15
E-7.1 Recommended Calibration Standards
p. 16
E-8 PCB Removal from Case
p. 16
E-9 Battery Compartment Design and Description
p. 17
E-9.1 Battery Replacement
p. 17
SECTION F: SAFETY APPROVALS AND CLASSIFICATIONS
F-1 UL-913 Intrinsically Safe Certification
p. 18
F-2 MIL. STD. 810 MTD. 511 Certification
p. 18
SECTION G: REVISION HISTORY AND MANUAL NOTES
G-1 Manual Revision History
p. 19
G-2 Manual Notes
p. 19
TABLE OF CONTENTS
