Operation Manual

MI 3121H Smartec 2,5 kV Insulation / Continuity Continuity
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Resistance to earth connection and equipotential bonding measurement procedure
 Select continuity function (RLOW or CONT) using the BACK / NEXT keys of
function selector.
 Set sub-function to RLOW.
 Enable and set limit (optional).
 Connect test lead to the top of the instrument.
 Compensate the test leads resistance (if necessary, see section 5.2.3).
 Disconnect from mains supply and discharge installation to be tested.
 Connect the test leads to the appropriate PE wiring (see Figure 5.12).
 Press the TEST key to perform the measurement.
 After the measurement is finished store the result by pressing the MEM button
(optional).
Figure 5.13: Example of RLOW result
Displayed result:
Main RLOW resistance.
Sub results checking
 Press the key TAB for a few seconds.
 The instrument will display sub result r1.
 Click the key TAB.
 The instrument will display sub result r2.
 Next click on the key TAB will return the instrument to display main result.
5.2.2 Continuous 7 mA resistance measurement CONT
In general, this function serves as standard Ω-meter with a low testing current. The
measurement is performed continuously without polarity reversal. The function can also be
applied for testing continuity of inductive components.