Seaward DO7010 User Manual

Page 9

1-2-2 Measurement ranges

The DO7010 measuring capacity is made by 4 resistance ranges manually or
automatically selected:

Range Current

Resolution

Accuracy

1A / 10A (0,1% read + 0,1% FS)

60m

1A / 10A (0,1% read + 0,1% FS)

600m

1A / 10A (0,1% read + 0,1% FS)

6000m

0,1A / 1A (0,1% read + 0,1% FS)

read = reading FS = Full scale

The maximum current value cannot exceed +10% of the rated value.

1-2-3 Manual or auto triggering mode

In MANUAL triggering mode, by pressing on the mechanical push button
MEASURE, the unit starts a measurement cycle generating a short current pulse and
allowing the voltage drop across the resistor to be measured. Using the Ohm’s law (R
= U / I), the unit computes the resistance value and displays the result on the LCD
screen.

The triggering mode is set in the SETUP menu.

1-2-4 Measurement quality control

calibration check can be done with the TEST function.

understand, is displayed on the LCD screen.

microprocessor, and an error message is displayed if the current is out of specs.

Each measurement range can be operated with 2 currents (high and low currents)

100

selected by the operator. The current generator is permanently controlled by the

In AUTO triggering mode, the measurement is triggered by detecting the current

Cancellation of thermal EMF errors is done either by the ZERO mode method,
consisting of a measurement without current, followed by a measurement
with current from which unwanted voltages are subtracted, or by the

AUTOTEST is automatically performed at each unit power on, and a

When a measurement default occurs (bad accessory contact, too high

current and one with negative current, and the result is the average of the two.

resistance for the range, etc...) a warning message, which is clear and easy to

AVERAGE mode method consisting of two measurements, one with positive

flowing through the specimen under test.

The maximum lead resistance for the current leads on the 6m range is 170m

Ω .

Operating Instructions

Digital Microhmmeter Type DO7010

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