720A Operation and Maintenance Manual – Rev S – January 25, 2019
Page 5
13231 Rooster Springs Rd.,
Austin, TX 78737
T:
(512) 858-4045
E:
amptec.com
SECTION B: 720A SPECIFICATIONS
B-1 Specifications for AMPTEC 720A Digital Micro-Ohmmeter
Resistance Range/Resolution:
Accuracy:
Below is valid for 1 year from -20° C to 70° C when stabilized at ambient
temperature after the product warms up:
•
200 mΩ
range:
± .02% of reading & .05% of range
•
2
Ω
- 200 K
Ω
range:
± .02% of reading; ± .03% of range
Calibration:
It is recommended that the product is calibrated in 1 year intervals; see
section E-4 for calibration instructions
Dimensions:
9.25” W x 18.5” D x 2.94” H
Fuse:
2A fuse; current rating is 2A and voltage rating is 250V
Instrument Display:
Display is 20,000 counts, 4 ½ digit resolution, LED
Measurement Update Rate:
Appox. 3 readings per second
Open Circuit Current Source Compliance Voltage:
~1.6 VDC
Overload/Overrange Indication:
Display flashes zeros
Storage Temperature:
-20° C to 70° C
Temperature Coefficient:
0.1 x accuracy per degree C°
Temperature Range:
•
Operating temperature:
0° C to 50° C (at rated accuracy above)
•
Storage temperature:
-20° C to 70° C
Terminal Configuration:
4-wire Kelvin banana jack binding posts
Weight:
4 lbs.
B-2 Specifications for AC Input
The AC Input power option for the 720A allows the user to plug the meter directly from
the AC power outlet to the meter. Meters with this option are supplied with a NEMA 5-
15P US 3 pin power cord that terminates at the meter with a IEC 60320 C-14
connection. To use this meter with AC power supplies above 125V, a power cord rated
for higher voltages is required.
AC Power Cord:
AMPTEC 720-AC AC power cord
•
Connector:
IEC60320 C-13
•
Current Rating:
10A
•
Plug:
NEMA 5-15P
•
Voltage Rating:
125V
Internal Output Power Supply:
85V to 264V
Rear AC Inlet:
AMPTEC P/N 05-75897
•
Connector:
IEC 60320 C-14
•
Current Rating:
15A
•
Voltage Rating:
250V
RANGE
200mΩ
2.0Ω
20.0Ω
200.0Ω
2.0 KΩ
20.0KΩ
200.0KΩ
NOMINAL
CURRENT
100mA 100mA 10mA
1mA
100uA
10uA
1uA
RESOLUTION
10uΩ
100uΩ
1.0mΩ
10.0mΩ
0.1mΩ
1.0Ω
10.0Ω