Tonghui TH2829 Series - DCR Accuracy; Lk Accuracy; Turns to Ratio Accuracy

TH2829X Series Operation Manual Chapter 8 Performance and Test
152
Table F Direct Calibrated frequency
20
25
30
40
50
60
80
[Hz]
100
120
150
200
250
300
400
500
600
800
[Hz]
1
1.2
1.5
2
2.5
3
4
5
6
8
[kHz]
10
12
15
20
25
30
40
50
60
80
[kHz]
100
120
150
200
250
300
400
500
600
800
[kHz]
1
[MHz]
There are 48 frequencies in Table F. The highest frequency of TH2829AX is
200kHz, the highest frequency of TH2829A is 300kHz, the highest frequency of
TH2829B(BX) is 500kHz and the highest frequency of TH2829C(CX) is 1MHz.
Cable length factor K
d
0.15%×(F
m
/ 1MHz)
2
× L
2
F
m
: test frequency [MHz]
L: test cable length [m], respectively 0m, 1m, 2m
Table G Temperature factor K
e
Temperature (℃)
0 - 18
18 - 28
28 - 40
K e
4
1
4
8.3.9 DCR accuracy
A(1+R
x
/5MΩ+16mΩ/R
x
)[%] ±0.2mΩ
When the instrument is in Middle and slow speed, A=0.25
In Fast speed, A=0.5
Where, R
x
is the tested resistance.
8.3.10 Lk accuracy
Inductance L’s accuracy +0.2%
8.3.11 Turns to Ratio accuracy
± A
t
× A
r
（1+1Ω/Zp+1/Q）[%]± 0.002
Fast: A
T
= 0.5
Middle and slow: A
T
= 0.25
Zp is the impedance of the tested primary inductance
A
r
is the test signal accuracy modification value in figure B