Seaward DO7e - Manual (Page 9)

BATTERY REPLACEMENT
Competent and skilled personnel should only carry out Battery replacement. Care should be
taken to ensure the correct polarity of the connecting wire. The Red Wire always to the positive
battery terminal (Note the blue tag fi tted to this wire does NOT indicate polarity). If in doubt
please refer to our Service Department.
7. TECHNICAL DATA
Digital Display : 4 digit, LCD 0.8” height;
6000 count with automatic
decimal point and error
warning lamps
Working temperature : 0...+40°C rel.
humidity max. 80%
Normal temperature : 20°C
Storage temperature : -20°C ... +50°C
Mains connection : 115V
Range 103V-127V 47-63 Hz (400Hz optional)
230V
Range 207V-253V 47-63Hz (400Hz optional)
Power consumption < 20VA
Size (mm.) : 343 x 327 x 152
Mass : 6.0 Kgs.
Measurement
Resistance : True four-terminal measurement
with fi xed dc measuring currents.
Measuring time : Approx. 0.5 seconds
Polarity : Forward and reverse measurement
current may be selected, plus
average mode which automatically
displays the average value of
positive and negative polarity
measurement.
Ranges and Accuracy
* NOTE Temperature coeffi cient to be added to uncertainty when operating outside the range 15 to 25°C
NOTE: Measurements on the lowest range 60µΩ may have an additional zero offset of up to 20
digits, if the measuring current is applied repeatedly for long periods. This offset can be
eliminated by using the average measuring mode.
Digital Microhmmeter Type DO7e Operating Instructions
6
Range Resolution
Typical
Current
Uncertainty
At 20°C ± 5°C, 1 Year
Temperature
Co-effi cient/°C*
600 Ω
60 Ω
6 Ω
600 mΩ
60 mΩ
6 mΩ
100 mΩ
10 mΩ
1 mΩ
100 µΩ
10 µΩ
1 µΩ
1 mA
10mA
100 mA
1 Amp
1 Amp
10 Amp
±(0.25% Rdg + 0.05% FS)
±(0.25% Rdg + 0.05% FS)
±(0.25% Rdg + 0.05% FS)
±(0.25% Rdg + 0.05% FS)
±(0.25% Rdg + 0.05% FS)
±(0.25% Rdg + 0.05% FS) 40 ppm Rdg + 30 ppm FS
40 ppm Rdg + 30 ppm FS
40 ppm Rdg + 30 ppm FS
40 ppm Rdg + 30 ppm FS
40 ppm Rdg + 30 ppm FS
40 ppm Rdg + 250 ppm FS