Seaward DO4000 - Manual (Page 9)

Operating Instructions Digital Ohmmeter DO4000 Series
7
7. Technical Data
Measurement
RESISTANCE
DO4000/4001
DO4002
TEMPERATURE
Digital Display
Working temperature
Calibration temperature
Storage temperature
Size (mm.)
Mass
15mm 4 digit, LCD 15 mm height with automatic decimal point
units and error warning lamps
0...+40°C rel. humidity max. 80% non condensing
20°C
-20°C ... +50°C
215 x 130 x 55 (WHD)
0.8 Kgs.
Resistance
Measuring time
Average
Auto-zero
True four terminal measurements with fixed dc measuring currents.
Approx. 20 milliseconds in +VE and -VE
Approx. 40 milliseconds in AVE mode
Approx. 12 hours continuous measurement at 100 mA range
Measures with current in forward and reverse direction displaying
the average value. This eliminates errors due to thermal emf. Not
recommended for inductive circuits
Permits the automatic zero of amplifiers eliminating errors due to
thermal emf
Range Resolution
Typical
Current
Accuracy @ 20ºC ±5ºC,
1 year
Temperature
Coefficient/ºC
4k Ω
400 Ω
40 Ω
4 Ω
400m Ω
40m Ω
1 Ω
100m Ω
10m Ω
1m Ω
100µ Ω
10µ Ω
100µA
1 mA
10 mA
10 mA
10 mA
100 mA
±(0.05% Rdg +0.02% FS)
±(0.05% Rdg +0.02% FS)
±(0.05% Rdg +0.02% FS)
±(0.05% Rdg +0.03% FS)
±(0.05% Rdg +0.05% FS)
±(0.05% Rdg +0.1% FS)
30 ppm Rdg +1 ppm FS
30 ppm Rdg +1 ppm FS
30 ppm Rdg +1 ppm FS
30 ppm Rdg +4 ppm FS
30 ppm Rdg +25 ppm FS
30 ppm Rdg +25 ppm FS
Range Resolution
Typical
Current
Accuracy @ 20ºC ±5ºC,
1 year
Temperature
Coefficient/ºC
400 Ω
40 Ω
4 Ω
400m Ω
40m Ω
4m Ω
100m Ω
10m Ω
1m Ω
100µ Ω
10µ Ω
1µ Ω
1mA
10mA
100mA
1A
1A
1A
±(0.05% Rdg +0.02% FS)
±(0.05% Rdg +0.02% FS)
±(0.05% Rdg +0.03% FS)
±(0.05% Rdg +0.05% FS)
±(0.05% Rdg +0.1% FS)
±(0.05% Rdg +0.1% FS)
30 ppm Rdg +1 ppm FS
30 ppm Rdg +1 ppm FS
30 ppm Rdg +4 ppm FS
30 ppm Rdg +25 ppm FS
30 ppm Rdg +25 ppm FS
30 ppm Rdg +25 ppm FS
Range Resolution Accuracy
-50...+800ºC 0.1ºC ±0.2ºC