description explanation

[Muhammad Asif June 22, 2016 at 8:03 pm Post count: 0]

#5777 Reply |

Dear drok team
I am interested in the purchasing of following product.

https://www.amazon.com/gp/aw/d/B00YBX1LWS?keywords=dc%20voltmeter%20ammeter&pc_redir=T1&redirect=true&tag=proeng-20

In the description of this product at Amazon it is mentioned that:
Wiring hole diameter: 8.5 mm
What does it mean?
Regards
Muhammad Asif

[DrokKeymaster June 23, 2016 at 2:47 am Post count: 2971]

#5794 Reply |

Hello Muhammad,
Thank you for writing in.
This hole diameter is the diameter of the transformer.
Hope this can help you.
Best regards

[Muhammad Asif June 23, 2016 at 3:26 am Post count: 0]

#5799 Reply |

Thanks friend.
Please tell me the working or purpose of two potentiometer in the transformer ?
Regards
Muhammad Asif

[DrokKeymaster June 24, 2016 at 2:51 am Post count: 2971]

#5837 Reply |

Hello Muhammad ,
The two potentiometer in the transformer can be used for voltage/current calibration.
Here is the instruction of voltage/current calibration:

Current calibration:
1. In the condition without current, use slotted screwdriver to adjust the “Zero” potentiometer behind the current transformer until the decimal point of the current meter flashes quickly which is the best point. The decimal point is always bright or not bright, which means zero offset to positive. The decimal point flashing slowly means zero offset to negative.
2. Then load the half of the actual measured current to the meter, adjust the “Span” potentiometer beside the current transformer until the displayed current value is the same as the standard meter.

Voltage calibration:
In the condition of half of actual measured voltage, use screwdriver to adjust the voltage calibration potentiometer inside of the meter until the displayed voltage value is the same as the standard meter.

Hope this can help you.
Best regards

[Muhammad Asif June 24, 2016 at 3:24 am Post count: 0]

#5843 Reply |

Dear friend
You wrote that The two potentiometer in the transformer can be used for voltage/current calibration.
For current calibration you used the one in transformer but for voltage calibration you used the potentiometer which is inside of the meter.
So when the second potentiometer in transformer will be used?
Regards
Muhammad Asif

[DrokKeymaster June 24, 2016 at 6:17 am Post count: 2971]

#5853 Reply |

Hello Muhammad Asif,
Sorry for causing you misunderstanding.
The voltage calibration do not need to use the potentiometers in the transformer.
For the current calibration, it needs to use the two potentiometers.
Best regards

[Muhammad Asif June 24, 2016 at 7:07 am Post count: 0]

#5854 Reply |

Thanks dear friend
Now understood.please can you provide me its user manual or datasheet?

[DrokKeymaster June 27, 2016 at 3:12 am Post count: 2971]

#5921 Reply |

Hello Muhammad Asif,
Here is the datasheet of the product:
DATASHEET_100384
Hope this can help you.
Best regards

[Muhammad Asif June 27, 2016 at 5:46 am Post count: 0]

#5929 Reply |

Thanks friend.
Please tell me that is this meter is the product of drok?
Or it is Chinese made ? as model no YB28VA is printed on back.
Regards
Muhammad Asif

[DrokKeymaster June 28, 2016 at 2:41 am Post count: 2971]

#5962 Reply |

Hello Muhammad Asif,
It is the product of DROK.
The module number just shows the one of the product series of DROK.
Hope this can help you.
Best regards

[Muhammad Asif June 28, 2016 at 5:09 am Post count: 0]

#5968 Reply |

Ok thanks

[Muhammad Asif June 29, 2016 at 6:43 am Post count: 0]

#5992 Reply |

Dear friend check this link
https://www.amazon.com/gp/aw/d/B00YBX1LWS?keywords=dc%20voltmeter%20ammeter&pc_redir=T1&redirect=true&tag=proeng-20#
In this picture there is no label of drok,also why drok preferred Chinese language instead of English on back ?

[DrokKeymaster June 30, 2016 at 2:12 am Post count: 2971]

#6010 Reply |

Hello Muhammad Asif,
Thank you for writing in.
Because most of our technicians are Chinese, this is convenient for them to check the product.
But we are trying our best to improve it now.
Beg your understanding.
Best regards

[Muhammad Asif August 25, 2016 at 11:55 am Post count: 0]

#7236 Reply |

Dear friend
Check reply #5837
You wrote as mentioned below.

(2. Then load the half of the actual measured current to the meter, adjust the “Span” potentiometer beside the current transformer until the displayed current value is the same as the standard meter.

Voltage calibration:
In the condition of half of actual measured voltage, use screwdriver to adjust the voltage calibration potentiometer inside of the meter until the displayed voltage value is the same as the standard meter)
Now please explain me that what do you mean by the “Then load the half of the actual measured current to the meter” and “half of actual measured voltage”?

[DrokKeymaster August 26, 2016 at 2:38 am Post count: 2971]

#7251 Reply |

Hello Muhammad,
Thank you for writing in.
When you calibrate the current/voltage, it is recommended that the measured value is half of the measuring range, which can reduce error.
Hope this can help you.
Best regards

[Author]

Posts