Introduction
The Brennenstuhl Primera-Line PM 231 E is an energy consumption meter designed to help you monitor and reduce your electricity usage and costs. This device accurately measures various electrical parameters and provides insights into your energy consumption patterns. Please read this manual carefully before using the device to ensure safe and efficient operation.
Key features include measurement of voltage, frequency, current, power factor, and power. It also calculates total energy consumption and associated costs, displays measurement time in hours and minutes, and allows for the programming of two individual electricity tariffs (e.g., day and night rates). For data security, three LR44 batteries are included to back up your settings and measurements during power outages. The device also incorporates child protection features for enhanced safety.
1. Setup
1.1 Unpacking and Initial Inspection
Carefully remove the energy consumption meter from its packaging. Inspect the device for any signs of damage. If any damage is found, do not use the device and contact your retailer.
1.2 Battery Installation/Activation
The device comes with three LR44 batteries pre-installed for data backup. These batteries ensure that your settings and accumulated measurement data are retained even when the device is unplugged from the mains. If the display is dim or blank when unplugged, the batteries may need activation or replacement. Refer to the "Maintenance" section for battery replacement instructions.

Figure 1: The Brennenstuhl PM 231 E meter highlighting increased contact protection and the inclusion of batteries for data retention.
1.3 Connecting the Device
Plug the Brennenstuhl PM 231 E meter directly into a standard 230V wall socket. Ensure the connection is secure. The device features child protection for added safety.

Figure 2: The energy meter plugged into a wall socket, ready for use.
Once plugged in, connect the appliance you wish to measure into the socket on the front of the energy meter.

Figure 3: The energy meter connected to a coffee machine, demonstrating its application.

Figure 4: The energy meter can also be used with a power strip, though care should be taken to ensure display visibility.
1.4 Initial Settings (Time and Tariffs)
Before taking measurements, it is recommended to set the current time and program your electricity tariffs for accurate cost calculation.
- Setting Time: Use the SET button to enter time setting mode. Use the UP button to adjust values. Press SET again to confirm and move to the next setting (e.g., hours, minutes).
- Programming Tariffs: The device supports two individually adjustable electricity tariffs (Tariff 1 and Tariff 2). These are typically used for day and night rates.
- Press the FUNC button repeatedly until the tariff setting mode is displayed.
- Use the SET button to select Tariff 1 or Tariff 2.
- Use the UP button to adjust the cost per kWh for the selected tariff.
- Repeat for the second tariff if applicable.
- Set the time periods for each tariff using the SET and UP buttons.
2. Operating Instructions
2.1 Display Overview and Buttons
The device features a clear LCD display and four control buttons:

Figure 5: Front view of the energy meter, indicating display elements and control buttons.
- RESET: Resets all accumulated data (energy consumption, cost, measurement time). Press and hold for a few seconds to activate.
- UP: Used to increase values during setting modes (e.g., time, tariff rates).
- SET: Used to enter setting modes and confirm selections.
- FUNC (Function): Cycles through different measurement displays.
2.2 Cycling Through Measurement Displays
Press the FUNC button repeatedly to cycle through the following measurement parameters:
- Voltage (V): Displays the current mains voltage (e.g., 230V).
- Frequency (Hz): Shows the current mains frequency (e.g., 50Hz).
- Current (A): Indicates the current drawn by the connected appliance.
- Power Factor (PF): Displays the power factor of the connected appliance.
- Power (W): Shows the instantaneous power consumption of the connected appliance in Watts.
- Total Energy Consumption (kWh): Accumulates the total energy consumed by the appliance over time.
- Total Cost: Calculates the total cost based on the accumulated energy consumption and programmed tariffs.
- Measurement Time (Hours:Minutes): Displays the total duration the device has been actively measuring.
2.3 Resetting Data
To clear all accumulated energy consumption, cost, and measurement time data, press and hold the RESET button for approximately 3-5 seconds until the display clears or resets to zero. This is useful when starting a new measurement period for a different appliance or after changing tariffs.
3. Maintenance
3.1 Cleaning
To clean the device, unplug it from the mains socket and disconnect any connected appliances. Wipe the exterior with a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the device in water.
3.2 Battery Replacement
The device uses three LR44 button cell batteries for data backup. If the display becomes dim or data is lost when the device is unplugged, the batteries may need replacement. To replace the batteries:
- Unplug the energy meter from the wall socket.
- Locate the battery compartment, usually on the back or side of the device.
- Open the compartment cover. This may require a small screwdriver.
- Carefully remove the old LR44 batteries. Note their polarity.
- Insert three new LR44 batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
Dispose of old batteries according to local regulations.
4. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim when plugged in. | No power from the wall socket. | Check the wall socket with another appliance. Ensure the meter is fully inserted. |
| Display is blank or dim when unplugged. | Backup batteries (LR44) are depleted or not properly installed. | Replace the LR44 batteries as described in the "Maintenance" section. Ensure correct polarity. |
| Readings appear inaccurate. | Incorrect tariff settings; device malfunction. | Verify your tariff settings. Ensure the appliance is drawing power. If issues persist, try resetting the device. |
| Data (consumption, cost) is lost after unplugging. | Backup batteries (LR44) are depleted or not properly installed. | Replace the LR44 batteries. |
| Buttons are unresponsive. | Temporary software glitch. | Unplug the device from the wall socket for a few minutes, then plug it back in. If possible, remove and reinsert backup batteries. |
5. Specifications
| Feature | Detail |
|---|---|
| Model Number | 1506600 |
| Manufacturer | Brennenstuhl |
| Dimensions (L x W x H) | 7.7 x 8 x 13.7 cm |
| Weight | 180 grams |
| Voltage | 230 Volts |
| Energy Type | AC/DC |
| Material | Plastic |
| Batteries | 3 x LR44 (included) |
| Measurement System | Metric |
| Included Components | Energy consumption meter |
6. Warranty and Support
6.1 Warranty Information
The Brennenstuhl Primera-Line PM 231 E (Model 1506600) comes with a manufacturer's warranty. Spare parts availability is typically 1 year from the date of purchase. Please retain your proof of purchase for warranty claims. For specific warranty terms and conditions, refer to the documentation provided with your product or visit the official Brennenstuhl website.
6.2 Customer Support
If you encounter any issues not covered in this manual or require further assistance, please contact Brennenstuhl customer support. Contact details can usually be found on the product packaging or the official Brennenstuhl website (www.brennenstuhl.com).