Tietzsch omegaMegaSafe ISO 1Ex Bedienungsanleitung Seite 24

4.3 Preparing measurement
In Ex-areas a secure connection with the measure-
ment object must be ensured for safety reasons.
 Attach the black line to the lower socket and
connect it with the first test point by using the
crocodile clip.
 Attach the red line with the upper socket and
plug the crocodile clip onto the second test
point.
The following maximum test voltages apply in
Ex-areas:
32 V at external capacitance up to 200 nF
100 V at external capacitance up to 100 nF
500 V at external capacitance up to 1 nF
Note: Outside of Ex areas, rapid checks may be
performed without secure connection with the
optionally attachable test electrode (see section 11.).
Attenion!
Observe the safety-related characteristics in Ex areas.
The test object has to be zero potential.
4.4 Measuring
The equipment is ready for measurements after zero
balance (see section 4.2) and measurement prepara-
tions (see section 4.3).
 s witch on the device with
Attention! The test object has to be deenergised.
In case the red Volt-LED light up and an acoustic
signal occurs, then external voltage is applied.
The pushbutton is blocked and a resistance
test is not possible (see section 4.7 – External
voltage).
Note: Short warning singnals can result from
inductive voltage or electrostatic charging.
 When no external voltage is applied, start
measuring with 32 V.
 Keep pushbutton
measurement result is indicated.
Note: If the measurement value is out of
measurement range „OL" (Overflow) appears on the
display.
For measurements with very high resistances of
more than 2 GΩ see section 4.6.
If the device does not display any measurement
values evaluation can occur outside of the selected
measurement range, e. g. if the test probe slips or if
strong fluctuating impedances have influence.
 When capacitances exist, then, after having
released the pushbutton
voltage will be indicated in the upper display
part see section 4.5). The flashing Volt-LED warns
against charging voltage of the external capa-
citance.
Note: Discharge can be accelerated by actuating
pushbutton 32 V
100 V
500 V
 After discharging "Rdy" appears in the display
and the test procedure is finished.
Attention! Do not disconnect the device form the
plant until the Volt-LED has ceased.
 If required, repeat tests with higher test voltage.
Therefore, observe the regulations of the plants
that have to be tested.
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pressed until a constant
, the discharge