Megger INGVAR, Руководство пользователя

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BH0654BE ZP-BH05E 57
10 CALIBRATION
10.3 Calibration of scale
factor, ammeter 1
Scale factor, range LOW
1]
Press the menu-option
A
and change the
range to ”LOW”.
1]
Press to confirm
1]
Press
A
to leave the menu.
2]
Connect a reference ammeter to the current
output.
Note: If a current transformer is used, make
sure that it is applied at least 0.5 meter from
any bend of the current conductor. Other
conductors shall not be closer than 0.5 meter
from the current transformer.
3]
Press
HOLD
button to activate the Hold-func-
tion.
The lamp in the
HOLD
button lights up.
4]
Press the
MOM
button and adjust the current
until the calibration value (about 2/3 of maxi-
mal current, see chapter 11 Specifications,
section 11.2 -11.5) appears on the reference
ammeter. Release the
MOM
button when the
value is adjusted.
Note: The lamp on the
HOLD
button should be
flashing.
5]
Press the SYS menu option.
6]
While simultaneously pressing the buttons
ESC
and quickly turn the Select/set knob
clockwise, until "CALIBRATION" appears on
the display.
7]
Press to confirm.
8]
Choose “AMMETER 1”
9]
Press .
10]
Turn the Select/set knob until the current
value on the display matches that on the
reference ammeter.
11]
Press to confirm the calibration.
Scale factor, range HIGH
1]
Press the menu-option
A
and change the
range to ”HIGH”.
1]
Press to confirm
1]
Press
A
to leave the menu.
2]
The rest of the procedure is the same as step
2 - 8 in the ”LOW”-range.
10.4 Scale factor for the
I/30-function
1]
See that the I/30-function is turned off.
2]
Activate the Hold-function by pressing
HOLD
(the LED in the button lights up).
3]
Press the MOM button and hold it down for a
second.
The LED in the
HOLD
button should start flash-
ing.
4]
Note the current value for Ammeter 1 that is
displayed on the display.
5]
Activate the I/30-function.
6]
Press the
MOM
button and hold it down for a
second.
The LED in the
HOLD
button should start flash-
ing.
7]
Press the
SYS
menu option.
8]
While simultaneously pressing the buttons
ESC
and quickly turn the Select/set knob
clockwise until "CALIBRATION" appears on
the display.
9]
Press to confirm.
10]
Choose ”AMMETER 1”
11]
Press .
”I/30” is displayed in the upper right corner
of the display.
12]
Turn the Select/set knob until the current
value on the display matches the value from
the previous measurement in step 4.
13]
Press to confirm the calibration.
The I/30 function is intended only for use at coarse
adjustment of high currents and gives only an approxi-
mate indication.