620LK Operation and Maintenance Manual – Rev. J – Updated January 2020
Page 5
13231 Rooster Springs Rd.
Austin, TX 78737
T:
(512) 858-4045
E:
amptec.com
SECTION B: 620LK SPECIFICATIONS
B-1 Specifications for AMPTEC 620LK Bonding Milliohmmeter
Resistance Range/Resolution/Accuracy:
Calibration:
It is recommended that the product is calibrated in 1 year intervals. See
section E-7 on page 15 for calibration instructions.
Dimensions:
7.69” W x 7.56” D x 3” H.
Hazardous Use Locations:
Unit is independently UL-913 approved for use in Class 1,
Division 1, Groups A, B, C, and D locations from -20° C to 50° C, as well as MIL. STD.
810 MTD. 511 approved for use in explosive and volatile fuel atmospheres.
Instrument Display:
Display is 20,000 counts, 4 ½ digit liquid crystal display with a
back light that indicates autolock. See section D-2.7 on page 9 for additional information
about the autolock feature.
Low Battery Indication:
Display shows “LO BAT”.
Measurement Update Rate:
Appox. 3 readings per second.
Open Circuit Current Source Compliance Voltage:
~5.0 VDC
Over-Range Indication:
Display shows “1 - - - -” and “>>>OR”.
Power:
Disposable AA alkaline batteries inside separate chemical and F.O.D. resistant
metal battery box. 4 batteries power the unit, and are 1.5 VDC AA alkaline type Duracell
MN1500. Do not mix battery brands and always replace all batteries at same time. See
section E-9.1 on page 17 for instructions on battery changing.
Temperature Range:
Unit can operate from -20° C to 40° C at rated accuracy. Unit can
be stored from -20° C to 70° C.
RANGE
200 mΩ
2 Ω
NOMINAL CURRENT
100 mA
100 mA
RESOLUTION
0
.01 mΩ
0
.1 mΩ
ACCURACY
± 0.05% of reading
± 0.05% of reading
