PROGRAMMING C
NTA47262-000A6 15 / 55
a) "Inductive Resistance" Measurement Mode
This mode is intended for performing measurements on transformers, motors and any inductive component.
Make sure that the display shows thec icon.
From the standby position, to start a cycle:
Press.
Check that the "current" and "voltage" wires are correctly connected: if they are incorrectly connected, the
display shows an error message with a number (Err 11: "current" wires incorrectly connected, Err 12:
"voltage" wires incorrectly connected). The unit returns to the standby position and will continue its cycle
once the connections are correct.
With the current switched off, the residual voltage (U0) across the resistor terminals is measured. If this
voltage level is too high, the unit displays Err 13.
The current (I) is switched on: it remains permanent until the unit returns to "standby".
The voltage across the resistor terminals (U1) is measured and the measurement R = (U1 – U0) / I is
displayed.
All subsequent measurements comprise only a Un measurement as Uo remains in memory.
The cycle is stopped by pressing .
Operating diagram:
C = connection check
0 = residual voltage measurement (stored).
1,2,3…n = successive voltage measurements across the resistor terminals.
Interval between two measurements: 120 ms.
The delay time specified for the first measurement (1,200 ms) is an indication only; it may vary depending on
the load level measured.
REMARKS:
1. If the range is exceeded, the unit displays Err 07.
2. The current source is thermally protected (measurement at 10A for a length of time in excess of a few tens
of seconds causes heating). In this case a safety feature cuts the current and the unit displays
Err 05.
We recommend letting the unit cool off before performing a new measurement.
3. Any change of range will stop the cycle and the unit returns to standby.
4. After a measurement cycle, the unit fully discharges the inductance. Returning to standby implies waiting
for the complete discharge of the inductance by the OM 17. During discharge, the unit displays the
icon. For operator safety reasons, during this time and as long as this icon is displayed, it is
essential not to touch the connection wires.
b) "Low Inductive Resistance" Measurement Mode
To Next Page
Loading...
