VAH45020S Bidirectional DC Multimeter

[Rob Gray April 21, 2021 at 12:09 pm Post count: 0]

#67793 Reply |

 

Is there any aditional information on this meter other than what ships with it?  There are menu selections such as ADS and DTE which are not explained in the manual.

 

Also, is there a menu setting to change the charge/discharge direction?  I have it wired and it appears to register discharge as charging and charging as discharging.  I can rewire it, but wondered if there was a setting to reverse it?

 

Thanks!

[Rob Gray April 21, 2021 at 3:21 pm Post count: 0]

#67807 Reply |

Also, for the relay operation, can I supply power to the relay from the same battery the controller is using?

For example, could I move the jumper from 2W to 3W, and instead of using an external power supply use the battery to power the relay coil as well as the VAH45020S unit?

I would like to be able to use the relay functions of this unit without the need for an external supply.

[DrokKeymaster April 22, 2021 at 8:28 am Post count: 2971]

#67879 Reply |

Hi,

When you move the jumper from 2W to 3W,  you have to connect external power supply to  + VEXT-,  or the whole measuring module and relay can’t work.

The ADS and DTE  is  not available  for this version, please ignore that.

Best regards,

DROK

[Rob Gray April 22, 2021 at 10:57 am Post count: 0]

#67885 Reply |

Is it possible to connect the battery to the sensor + and – connections, and to also connect the battery to the vext + and – ?

Or, is it OK to use the same external power supply to both charge the battery and also connect to vext + and – ?

My first choice would be to use the battery to control all functions, but if that is not possible, I would like to be able to use a single power supply to both charge and control the relay.  It is not practical for my purposes to have two power supplies connected, 1 for charging and the 2nd for relay control.

Is there a schematic of the control module available?

 

Thanks

[DrokKeymaster April 23, 2021 at 8:44 am Post count: 2971]

#67984 Reply |

Hello,

You can use one power supply , the premise is that measured voltage is dc 6-75v. Moduel can’t be powered by measured cirucit.

The purpose of external power suply is to power the module when measured voltage  is out of the range (dc 6-75V) and relay.

For example, measuring votlage is 100v, module can’t accept 100v working votlage. In that case, you can only connect independent power supply to + VEXT-.

Best regards.

[Tom k May 18, 2021 at 4:12 pm Post count: 0]

#70934 Reply |

How do I sync the battery and the meter?  The battery is fully charged but the meter shows 20%. Seems silly that I have to turn off the meter; discharge the battery; turn on the meter; recharge the battery.

[Tom k May 18, 2021 at 4:15 pm Post count: 0]

#70935 Reply |

The documentation shows display item #8 is on/off and is “Output Status”.  What does that do?

The documentation says the display can be turned off. How do you do that?

[Tom k May 18, 2021 at 7:40 pm Post count: 0]

#70952 Reply |

Did this question get answered?

Also, is there a menu setting to change the charge/discharge direction?  I have it wired and it appears to register discharge as charging and charging as discharging.  I can rewire it, but wondered if there was a setting to reverse it?

 

[DrokKeymaster May 19, 2021 at 8:41 am Post count: 2971]

#70996 Reply |

Hello Tom k，

Are you  talking about this item? https://www.amazon.com/dp/B089SR5D7P?ref=myi_title_dp

This item can’t detect battery capacity, you need to program BAT （the total battery ）and BPC (percentage of remaing capacity ) in advance. Did you program these two parameters?

There are no setting to change current direction but change connection.  Display will turned off automatically.

And if you want to control output on/ off , please connect relay as per below wiring diagram.

[Tom k May 19, 2021 at 2:45 pm Post count: 0]

#71014 Reply |

Yes, I did set BAT and BPC. If I understand correctly if the cumulative capacity on the display does not match that of the battery (example: battery is fully charged but display shows 50%) I should use BPC to adjust the display.  Is that correct?

[DrokKeymaster May 20, 2021 at 8:54 am Post count: 2971]

#71073 Reply |

Hello，

Yes, BAT and BPC  are both need to be set. Meter only record the capacity  flows through it, it can’t check the  battery capacity.  If you don’t set  BAT and BPC parameters, it will not show correct percentage.

Did you confirm BPC is set successfuly? Would you like to show that by video?

Best regards.

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