Cropico DO7 - Battery Replacement; Technical Data

CROPICO LTD – DO7
Issue 7/2001
5
BATTERY REPLACEMENT
Battery replacement should only be carried out by competent and skilled personnel. 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 fitted 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 : 100/120/220/240V
+10 -13% 47-63 Hz
Size (mm.) : 343 x 327 x 152
Mass : 8.3 Kgs.
Measurement
Resistance : True four-terminal measurement
with fixed 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
Range Resolution
Typical
Current
Uncertainty
At 20
°
C
±
5
°
C, 1 Year
Temperature
Co-efficient/
°
C*
60
Ω
10 m
Ω
1mA
±
(0.15% Rdg + 0.05% FS)
40 ppm Rdg + 30 ppm FS
6
Ω
1m
Ω
10 mA
±
(0.15% Rdg + 0.05% FS)
40 ppm Rdg + 30 ppm FS
600 m
Ω
100
µΩ
100 mA
±
(0.15% Rdg + 0.05% FS)
40 ppm Rdg + 30 ppm FS
60 m
Ω
10
µΩ
1Amp
±
(0.15% Rdg + 0.05% FS)
40 ppm Rdg + 30 ppm FS
6m
Ω
1
µΩ
10 Amp
±(0.2% Rdg + 0.1% FS)
40 ppm Rdg + 30 ppm FS
600
µΩ
0.1
µΩ
10 Amp
±(0.2% Rdg + 0.2% FS)
40 ppm Rdg +250 ppm FS
* NOTE Temperature coefficient to be added to uncertainty when operating outside the range 15 to 25°C
NOTE: Measurements on the lowest range 600µΩ will have an additional zero offset of up to 20
digits, if the measuring current is applied for long periods. This offset can be eliminated by using
the average measuring mode.