Kewtech KT72 User Manual

14
5.3.1 Null setting for Class I Test
⑴ Set the function switch to Class l Test 200mA function.
⑵ Insert the Earth pin adapter (M-8251) in to the end of the Earth
terminal of the Test socket.
⑶ Connect the Test lead with the crocodile clip (M-7242) to the
Terminal for RPE-Test Lead of the instrument, and attach the
crocodile clip on to the earth pin. (Fig.8)
⑷ Press the
NULL
|
250V/500V
switch whilst maintaining contact
between the Test Lead and the earth pin adapter, the resistance of
the Test Lead will be displayed on the LCD as shown in Fig.9 for
2sec.
Then, the instrument cancels the resistance value of the Test Lead
and adjusts the displayed value to 0.00 as shown in Fig.9.
At this point the
NULL
icon is displayed in the LCD.
The Null setting cannot be done when the test lead resistance is 3Ω
or more.
A message no appears to indicate that the resistance is exceeding
the Null setting range.
Display at Null setting
⑸ Null setting can be released by pressing
NULL
|
250V/500V
switch
for 2sec. The
NULL
mark on the LCD will disappear when Null
setting is released.
Preparation
before a
measurement
M-7242
M-8251
Earth pin
Set the Function switch to
“Class I Test 200mA”
Fig.8
Fig.9

Kewtech KT72 Specifications

General

Brand	Kewtech
Model	KT72
Category	Test Equipment
Language	English