SECTION B - 620A-4 TESTER SPECIFICATIONS
20Ω /
1 mΩ
200Ω /
10 mΩ
2000Ω /
100 m
Ω 20 KΩ /
1
Ω
5 mA / <8 mA
0.5 mA / 1.5 mA 50 µA / 150 µA
5 µA / 20 µA
Actual fail-safe currents vary with each instrument and may be ±20% from the typical value.
Table B-2. Specifications
Accuracy:
(for 1 year @25°C ± 10°C)
20 ohm through 20Kohm ranges ............................... ±0.02% of reading ±0.02% of range
(i.e if you a using a 10.000 ohm Resistance Std. - the high limit for the 620A-4 is a
ohm reading
and the low limit is
ohm reading )
Temperature Range
Operating
0°C to 50°C
Storage
-10°C to 70°C
Temperature Coefficient
20ohm through 20Kohm ranges ±0.002% per °C (from 0°C-15°C and 35°C-50°C)
Test Current Level
(Model 620A-4 version) 20ohm range is <5mA when operating normal, <8mA worst case when faulty
Instrument Display
. . (20,000 count) 4½ digit Super Bright Light Emitting Diodes (LED)
Over-Range Indication ..............................
( select next higher range) 620A-4 Display flashes
Measurement Update Rate .........
Approximately 300ms
Voltage Protection - Maximum Input ........
250VDC or AC
peak
without damage
Open Circuit Current Source Compliance Voltage ...........
clamped at ~1.6 volts
Power .........
(4 "D" 5.7AHr Heavy Duty) 1.2V rechargeable nickel-cadmium batteries
AC/DC Battery Charger (Option DC)
provides 6VDC at 100mA nominal
Dimensions ......................................................
9.5" (24cm) W x 11" (27cm) D x 3"(8cm) H
Weight
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 lbs net; 6.5 lbs shipping (not counting transit case and
accessories)
AMPTEC RESEARCH continually strives to make improvements with it's instrumentation and as such reserves the right for
general operation of its products and specifications to be subject to change
on rare occasion
.
