Note: To find and download the original instructions, it may be useful to search for PZME_051.pdf (instead of PZEM-051).
Features
The PZEM-051 has the following functions.- Default "Always On" Display includes these 4 values
- Source Voltage - used to determine the charge level of a battery
- Amperage Draw - used to determine the rate at which power is being drawn
- "Power" - wattage being drawn
- Note: This could be calculated from Amps * Volts, but this saves doing the math in your head
- "Energy" - watt-hours drawn since reset - used to determine how much a battery has been discharged (compare with the amp-hours of the battery
- displayed in Wh until 10000 Wh is reached
- displayed in kWh above 10000 Wh
- counter value is kept in memory and persists across power cycles until explicitly reset/cleared (i.e. When the PZEM-051 is disconnected and then reconnected to voltage, the accumulated value of "energy" will continue where it left off.)
- Backlight
- can be toggled on or off
- The backlight state is kept in memory and persists across power-cycles (i.e. When the PZEM-051 is disconnected and then reconnected to voltage, the backlight will return to the same state it was in previously.)
- High and Low Voltage Alarms -
- flashes the display/backlight
- Note: This is not an audible alarm
- can be customized to match the source battery.
- will flash the backlight when the actual voltage is not within range
Button Functions
- Backlight Toggle
- Each short click turns the backlight on or off
- Voltage Alarm Settings
- Click and hold until SEt appears in the display
- Each digit of the high and low voltage values will blink in turn
- If the value of a digit is not changed for 3 seconds, the blinking digit will automatically switch to the next digit in sequence
- Each short click in this mode will increase the value of the blinking digit, wrapping from 9 back to 0 (zero)
- Each alarm threshhold may be set to a value from 6.5V up to 99.90V
- Values less than 10.0 must have the first digit set to zero (e.g. 09.5)
- Important: The high voltage alarm threshold is on the left side, and the low voltage alarm threshold is on the right side (reversed from low-to-high, left-to-right)
- To store the new settings, click and hold again until PASS appears briefly on the display
- Note: If the high and low alarm thresholds are set backwards, the display will show "Err uAL" briefly, and the new values will be rejected (i.e. the previous values will be retained).
- Clear/Reset the counter/accumulated-value for Energy (watt-hours)
- Click and hold until CLr appears in the display, and the "Energy" counter value begins blinking.
- Note: SEt will appear first - continue holding until CLr appears
- A short click while in this mode will reset the "Energy" value to 0Wh (zero watt-hours)
- Adjust the type of Current Shunt
- Click and hold until Curr appears in the display
- Note: SEt will appear first, then CLr - continue holding until Curr appears
- Note: This should be preset to the type of shunt that was bundled with the PZEM-051, but can be switched to one of two types.
- Each short click in this mode will toggle between
- 100A - for the 100A/75mV shunt
- 50A - for the 50A/75mV shunt
