36
EXTERNAL SURVEY AND APPROBATION
The device must correspond to following items:
The out of the box must correspond to Instruction.
All inscriptions on the device must be clear.
The device must have no any damages on its package or plugs.
During the testing it is necessary to ensure that display is work appropriate. For this
purpose you must to turn on the device without the wires connecting and then to set
the modes switchers in to all position turn by turn. You will see on the screen the
information according to the operating instructions.
BRIDG TESTING
Defi nition of an absolute error of insulation resistance measurement
Connect the measuring wires B and C to the resistance box 0-10000 MOhm. The rest
plugs must be disconnected.
Turn on the INSULATION mode. Measuring of B-C.
Set up the 10, 100, 500kOm, 1, 5, 10, 50, 100, 500, 1000, 10000 MOhm by turns on
the resistance box.
For insulation resistance more than 1000 MOhm you should to waiting for stable
indications.
After each set up you should make a measurement of insulation resistance pressing
the [OK] key and to
fi
x the indications.
You must to make not than 3 measurements for each value on the resistance box.
The absolute error of measurement
Δ
l is de
fi
ned from equation:
Δ
l=Amsd-A0,
Where Amsd – the average of indications, A0 – the value on the resistance box.
Defi nition of an absolute error of loop resistance measurement
Connect the measuring wires A and B to resistance box 0
÷
10kOhm with accuracy
0,01Om.
Turn on the device in LOOP mode.
Set up the following resistance on the resistance box: 0; 0,1; 0,5;1; 10; 50; 100; 500;
1000; 2000; 5000 Ohm.
Make a loop measurement pressing the [OK] key and
fi
x the result after each
setting.
For each value on the resistance box you must make not less than 3 measurements.
The absolute error of the measurement
Δ
2 is de
fi
ned from the equation:
Δ
2=Amsd-A0.
Where Amsd is the average of indications, A0 is the value on the resistance box.
