Manual for a household power meter

Power Meter is a monitoring and testing instrument which measures the energy consumption of a connected devices and the cost of the electricity consumed

Technical specification
Operating voltage: 230V, 50HZ
Operating current: max 16A
Wide voltage range: 230V---- 250V
Timing display range: 0 second ----9999 days.
Wattage display (watts): OW---- 9999W
Voltage Display range: OV----9999V
Current display (amps): 0.000A-16.000A
Frequency display: 0Hz---9999Hz
Minimum Wattage display range: 0.0W----9999W
Maximum Wattage display range: 0.0W----9999W
Price display range: 0.00€/KWH----99.99€KWH
Total KWh and cost display: 0.000KWH----9999KWH,
0.00€----9999€

Insert the tester into the socket, then connect the measured household appliance to the tester's
socket

Display Mode

Entire LCD can be displayed for about 1 minute and then it automatically gets into Mode 1. To transfer from one mode to the other, press the FUNCTION button.

Mode 1: Time/Watt/Cost Display 
The display lights continuously while the device is connected to power source

LCD shows on first line 0:00, with first two figures mean minutes (2 figures will occur after 10 min) and the rest shows seconds. After 60mins, it displays 0:00 again with first two numbers means hour (2 figures will occur at 10hours) and the rest shows minutes. The rest can be done in the same manner which means after 24 hours, it will recalculate. LCD on second line displays current power which ranges in 0.0W-9999W. LCD on third line displays the current electricity costs which ranges in 0.0cost-9999cost. It will keep on 0.00cost before setting rate without other figures.

Mode 2: Time/Cumulative electrical quantity Display 
LCD on second line displays current cumulative electrical quantity which ranges in 0.000KWH-9999KWH without other figures. LCD on third line displays "DAY"-- "1 "will be showed on numerical part (the other three'-figures will be showed at carry) which means it has cumulated electrical quantity for 24hours(one day). The rest can be done in the same manner until the maximal cumulative time of 9999 days.

Mode 3: Time/Voltage/Frequency Display LCD on first line shows the same as in mode 1. LCD on second line displays current voltage supply (v) which ranges in 0.0V-9999V .LCD on third line displays current frequency (HZ) which ranges in 0.0HZ-9999HZ without other figures.

Mode 4: Time/Current/Power Factor Display LCD on first line shows the same as in mode 1. LCD on second line displays load current which ranges in 0.0000A-9999A (but max 16 A). LCD on third line displays current power factor which ranges in 0.00PF-1.00PF without other figures.

Mode 5:Time/Minimum Power Display LCD on first line shows the same as in mode 1. LCD on second line displays the minimum power which ranges in 0.0W-9999W. LCD on third line displays^. character of "Lo" without other figures. 

Mode 6: Time/Maximal Power Display LCD on first line shows the same as in mode 1. LCD on second line displays the maximal power which ranges in 0.0W-9999W. LCD on third line displays character of "High" without other figures.

Mode 7: Time/Price Display LCD on first line shows the same as in mode 1. LCD on third line displays the cost which ranges in 0.0000ST/KWH 99.99COST/KWH without other figures. Overload Display: When the power socket connects the load over 3680W, LCD on second line displays the "OVERLOAD" with booming noise to warn the users.

Resetting

If an abnormal display appears or the buttons produce no response,_: the instrument must be reset. To do this, press the RESET button. 

Setting Mode 
1. Electricity price setting 

After keeping COST button pressed lasting more than 3 seconds(LCD on third line display system defaults price, eg 0.0000ST/KWH ),the rendered content begins moving up and down which means that the device has entered the setting mode. Then press FUNCTION button to change selection and press UP/DOWN to set what you want. (On pressing once, the figure after decimal point will increase or decrease accordingly. On pressing and hold-on, figures after decimal point will increase or decrease slowly in 2 seconds while figures change quickly when hold-on time exceeds 2 seconds. When hold-on time reaches 10 seconds or more, the figures after decimal point will stop, while the Figures before decimal point begin to increase or decrease.) After that, press FUNCTION for _,swithing, then press "UP"and "DOWN" button again to set value which ranges in 00.0000ST/KWH-99.99COST/KWH. After that, press FUNCTION for switching, then press "UP" and "DOWN" button again to set value which ranges in 00.0000ST/KWH-99.99COST/KWH. After setting press COST to return to Mode7.