Measurements; Configuration Of The Measurement Options; Selection Of The Type Of Object - Sonel MMR-620 Operating Manual

Meas-
ure-
ments
3.1

Configuration of the measurement options

Meas-
Before you proceed to measurements, adjust the parameters of the measurement
urement
process to the properties of the measured object. This is done by selection of the appropri-
options
ate options in MENU – Measurement mode.
Type of
the ob-

3.1.1 Selection of the type of object

ject
The MMR-620 meter permits selection of one of the three types of objects:
The measurement marked with the
its purpose is to test objects of purely resistance-related character.
The
mode is based upon special object charging procedures, which are indispensable to per-
form correct measurements of resistance of highly inductive objects. In this mode the dura-
tion of the measurement depends upon the inductance of the object, since the meter
automatically selects the maximum possible measurement current and it waits until the
current has stabilised.
In the second measurement mode for inductive objects (
performed before the current stabilises completely. This solution permits to significantly re-
duce the duration of measurements of inductive objects, but it must be held in mind that
the accuracy of the measurement may be impaired.
If an approximate value of the resistance of the inductive object is known, then it is possi-
ble to reduce the duration of the measurement selecting manual adjustment of the meas-
urement range (Chapter 3.1.5) and to set the appropriate range (measurement current )
using the rotary knob. The declared precision of measurements is then maintained.
14
3
symbol means the measurement mode for inductive objects. This
OPERATING MANUAL MMR-620 Revision 1.6

Measurements

symbol is the shortest measurement (3s) and
)measurements are