Besantek BST-GFL31, Руководство пользователя

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BST-GFL31 User Manual
11
Warning!
To avoid unwanted operation of relay in the DC system, please select current limit properly. In
signaling circuit of railway station, over 5mA output current will cause unwanted operation of relay.
In such circumstances, you are suggested to select 5mA. Otherwise, you are always suggested to
select “UL” (limited power) to maximize the signal for faster signal tracing.
Select output voltage level and current limitation and click Next to continue. The signal generator will
have an initial measurement for distributed capacitance(C), output current(I) and grounding resistance(R)
(Fig. 2.4.1.3). Display of waveform is in square wave. The waveform indicates output voltage (blue) and
current (red) of signal generator. Numbers (e.g. 219 56 200 in Fig 2.4.1.3) above the waveform indicate
respectively maximal, average and minimal sampling value of voltage and current.
Note
:
For definition of distributed capacitance and its relationship with resistance and frequency, please
refer to “2.9 About Distributed Capacitance”.
Fig 2.4.1.3
2.4.2 Output Signal Adjustment
The initial measurement gives you a brief idea about the fault signal in the circuit. You may alternatively
adjust the output signal in the next screen as below by pressing button Next.
Fig 2.4.2
1) Adjustment for output voltage:
If the current signal is not strong enough (lower than 1mA) in the previous measurement, you are
suggested to increase the current signal by increasing output voltage to a higher level.
2) Adjustment for output current limitation:
Change the current limitation as 5mA or UL if necessary.
About output Frequency:
The defaulted output frequency is set as 10Hz, which makes it simpler for users’ operation. Based