Tonghui TH2840 Series - Use of Test Fixture; Warm-Up; Other Features

2
or where there is corrosive air.
2) The normal working temperature is 0℃～40℃, relative humidity ≤75%, so the instrument
should be used under above condition to guarantee the accuracy.
3) There is heat abstractor on the rear panel to avoid the inner temperature rising. In order to keep
good airiness, please don’t obstruct the left and right airiness holes to make the instrument
maintain the accuracy.
4) Although the instrument has been specially designed for reducing the noise caused by ac power,
a place with low noise is still recommended. If this cannot be arranged, please make sure to use
power filter for the instrument.
5) Please store the instrument in the place where temperature is between 5℃ and 40℃, humidity
is less than 85%RH. If the instrument will not be put in use for a time, please have it properly
packed with its original box or a similar box for storing.
6) The instrument, especially the test cable should be far from strong electro-magnetic field, to
avoid the jamming on measurement.
1.5 Use of Test Fixture
Please use the accessory test fixture or cable, the test fixture made by user or from other
company may cause the incorrect measurement result. The test fixture or cable should be kept
clean, as well as the pin of DUT, thus to guarantee the good connection between DUT and fixture.
Connect the fixture or cable to four test terminals Hcur, Hpot, Lcur, Lpot on the front panel. As for
the DUT with shielding shell, connect shielding layer or ground “┴”.
Note: When test fixture or cable has not being installed, the instrument will display an unstable test
result.
1.6 Warm-up
1) To guarantee the accurate measurement, the warm-up time is no less than 30 minutes.
2) Please not turn on or off instrument frequently, in order to avoid the inner data fluster.
1.7 Other features
Power: consumption power≤130VA.
Dimensions (W*H*D):
TH2840A, TH2840B, TH2840AX, TH2840BX: 430mm*177mm*265mm;
TH2840NX: 430mm*177mm*405mm
Weight: TH2840A, TH2840B, TH2840AX, TH2840BX about 11kg;
TH2840NX is about 17 kg.