Blue Digital LCD Display Voltmeter Ammeter Power Meter AC 80-260V 20A/4400W

Here is my youtube video showing details of such product in video:

Here is the Urdu Hindi version of this instrument review on Youtube:

You can buy this product on ICStation.com the link is here below:
http://www.icstation.com/blue-digital-display-voltmeter-ammeter-power-meter-260v-20a4400w-p-11981.html

Product Introduction:
1.Operating Voltage:AC 80-260V
2.Testing Voltage:AC 80-260V
3.Rated Power:20A/4400W
4.Operating Frequency:45-65Hz
5.Measurement Precision:1.0 level
6.Connection Picture:

Function:

1.Electric parameter measurement function (voltage,current,active power,electric energy)

2.Operating time function (record load accumulated operating time)

3.Overload alarm function (if it is over power alarm threshold,the backlight will

flash and sound an alarm)

4.Power alarm threshold preset function (users can set power alarm threshold freely)

5.Electricity quantity,operating time key clear function

6.Backlight function

7.Power failure data saving function (save accumulated electricity before power failure,

operating time,display item,backlight state)

8.Large screen LCD display function (display voltage,current,electric energy,active power,

accumulated operating time)

Kep/LCD Function:
UP:1.In normal display state,if short press it,and it will cycle display time,power,
     electricity quantity,current,voltage in reversed sequence.
   2.If short press it,then the digit will decrease 1 in power alarm threshold setting state.
   3.If short press it,it will quit the clear state when electricity quantity and time
     have been cleared.

DOWN:1.In normal display state,if short press it,and it will cycle display voltage,
       current,electricity quantity,power and time.
     2.If short press it,it will decrease 1 in power alarm threshold setting state.
     3.If short press it when electricity quantity and time have been cleared,then
       it will quit clear state.

SET:1.If long press the key for 3s in power display state,then it will enter into
      power alarm threshold setting state.
    2.If long press the key for 3s in electricity quantity or time display state,
      then it will enter into electricity quantity or time clear state.

OK:1.If short press the key,it will open or close the backlight in normal display state
   2.If short press the key,it will switch set digit in power alarm threshold setting state.
   3.If short press the key in electricity quantity or time clear state,then it will
     clear electricity quantity or time and quit the clear state.

Power overload threshold setting:
1.In normal display state,it will switch into power display value if press UP or DOWN key.
2.If long press the SET key for 3s,the screen will flash;then loosen the key.
3.Defaults the first digit (thousands place)on the left flash;this number can be changed
through short press UP or DOWN key;short press the OK key will finish this digit and
enter into next digit setting;from left to right are thousands' place-->hundreds' place-->tens' place-->ones' place;
after ones' place has been done,press OK key to finish the overload threshold setting,LCD screen
will back to POWER display item.
4.Overload threshold maximum power is 9999W;if the overload threshold is over this limit vlaue,
then the LCD screen will display ERR prompt;and it will back to overload setting interface and repeat setting after 3s.

Accumulated time,electricity quantity clear setting:
1.If press UP or DOWN key in normal display state,it will switch into accumulated time or
electricity quantity manu.
2.If long press the SET key for 3s,the screen will flash;then loosen the key
3.If short press the OK key,the accumulated time or electricity quantity data will be cleared,
and LCD screen will back to accumulated time or electricity quantity display item;if users don't want it
cleared,short press the UP or DOWN key;then it will quit clear state and back to manu display.

Backlight function:

1.After power on,the backlight will be automatically on;if short press the OK key in normal

display state,it will open or close the backlight.The backlight state has memory function;

that is to say that it will recover on/off state before power failure when power on again.

2.When the load power is higher than setting overload power threshold,the backlight will flash

and sound an alarm;when the power value is lower than overload power threshold,the backlight

will stop flashing and recover previous backlight state.

Manu display:
1.After power on,it defaults display power;if short press the UP key,then it will cycle display
time,power,electricity quantity,current,voltage in reversed order;if short press the DOWN key,
it will cycle display voltage,current,electricity quantity,power,time in order.
2.When the load power is higher thant alarm threshold,then it will back to power display manu
and then flash and alarm.
3.Manu display has memory function;that is to say it should recover display items before
power failure after power on again.

Notice:
1.This module can be used in indoors not outdoors.
2.The load can not be over rated power.
3.The connection sequence can not be false.

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