User Manual

Everything you need to install, configure, and use the MeterDevice power monitoring system.

1Installation Guide 2First-Time Setup 3What is an API Key?4Using the Dashboard 5Screen Elements Explained 6Charts & Data History 7Setting Up Alerts 8Creating a Mesh Network 9Organizing Your Devices 10GPS & Location 11Troubleshooting & FAQ

Installation Guide

The MeterDevice system consists of Meter Modules (power analyzers with CT clamps) and a WiFi Gateway that connects them to the cloud.

Mount the Meter Module

Snap the meter module onto a standard 35mm DIN rail inside your electrical panel. The module is compact and fits alongside existing breakers.

Attach CT Clamps

Open each split-core CT clamp and clip it around one phase conductor (L1, L2, L3). The clamps are non-invasive — no need to disconnect any wires. Make sure the arrow on the CT faces the load direction.

Connect Voltage Inputs

Wire the voltage input terminals to each phase and neutral. Follow the color-coded terminal labels: L1, L2, L3, N.

Connect the WiFi Gateway

Connect the WiFi Gateway to the meter module(s). The gateway will read data from all connected meters and transmit it wirelessly to the cloud.

Power On

Apply power to the panel. The meter module LED will light up, and the WiFi Gateway will start broadcasting its setup network within 30 seconds.

Safety Warning: Installation must be performed by a qualified electrician. Always turn off power before working inside the electrical panel.

First-Time Setup

After powering on, the WiFi Gateway creates a temporary WiFi network for initial configuration.

Connect to the Setup Network

On your phone or laptop, open WiFi settings and look for a network named MeterDevice-XXXX (where XXXX is your device serial). Connect to it — no password needed.

Open the Setup Portal

A captive portal page will open automatically. If it doesn't, open your browser and go to 192.168.4.1.

Select Your WiFi Network

The portal shows available WiFi networks. Select your building's WiFi, enter the password, and tap Connect.

Confirm Connection

The gateway will restart and connect to your WiFi. The LED will blink rapidly during connection and turn solid when connected. Data will begin flowing to the cloud within 10 seconds.

What is an API Key?

An API Key is a unique code that links your physical meter device to your cloud dashboard account. Think of it like a serial number that tells the cloud “this data belongs to this user.”

Where to find your API Key

Your API Key is printed on the label of your WiFi Gateway and included in the box packaging. It looks like: md-XXXX-XXXX-XXXX

How to register your API Key

1. Log into the dashboard at meterdevice.tech404.am

2. Click the key icon in the top-right of the Device Tree sidebar

3. Paste your API Key and click Save

4. Your devices will appear automatically once data starts flowing

Security

Each API Key is unique to your device. Only you can see your device data. Never share your key with unauthorized people. You can remove and re-register your key at any time from the dashboard.

Using the Dashboard

The dashboard is your control center for monitoring all your meters in real time.

Device Tree (Left Sidebar)

The left panel shows your devices organized in a tree structure: Country → Region → City → Branch → Building → Floor → Device. Click any item to expand or select it. You can add, rename, or delete items using the icons that appear on hover.

3D Building View

When you select a building or any device inside it, a 3D visualization appears showing all floors and devices. You can rotate and zoom the 3D model. Click on any floor or device within the 3D view to navigate to it. Green dots indicate online devices; gray dots indicate offline.

Device Data Panel

After selecting a device, the main area shows its real-time electrical data: voltages, currents, power readings, energy consumption, charts, GPS location, and alerts. Scroll down to see all sections.

Breadcrumb Navigation

At the top of the device data panel, you'll see a breadcrumb trail (e.g., Armenia / Yerevan / Building 1 / Floor 2 / Meter A). Click any part to navigate back to that level.

Screen Elements Explained

Here's what each element on the device screen means:

Voltage & Current Bars

Phase Voltages (V) — Three colored bars showing voltage on phases A (red), B (blue), C (green). Normal range: 198–253V. Below the bars, Line Voltages (AB, BC, CA) show phase-to-phase voltage.

Phase Currents (A) — Three bars showing current draw on each phase. The scale auto-adjusts based on the highest current reading.

Power Cards

Active Power (W) — Total real power consumed. Per-phase breakdown shown below the total. This is what you pay for on your electricity bill.

Reactive Power (VAR) — Power stored and returned by inductive loads (motors, transformers). High reactive power means poor power factor.

Apparent Power (VA) — The total power flowing through the circuit — combination of active and reactive. Used for sizing cables and equipment.

Power Factor — Ratio of useful power to total power. Ideal value: 1.000. Below 0.85 may result in utility penalties. Shown per phase and total.

System Info

Frequency (Hz) — Electrical grid frequency. Should be close to 50.00 Hz (or 60 Hz in some countries). Deviation indicates grid instability.

Total Energy (kWh) — Cumulative energy consumed across all phases since the meter was installed.

Status — Shows '✓ Normal' when everything is OK, or a warning code if the device detects an alarm condition.

Other Sections

Energy Breakdown — Shows active and reactive energy consumed per phase (A, B, C) individually, plus total.

Phase Angles — The angular relationship between voltage and current waveforms. Used for advanced power quality analysis.

GPS Map — Interactive map showing where the device is physically installed. Only visible if the device has a GPS module.

Charts & Data History

The Real-Time Charts section shows four live graphs that update every 3 seconds:

Voltages (V) — Phase A (red), B (blue), C (green) voltage trend. Helps identify voltage sags, swells, and imbalance over time.

Currents (A) — Phase A, B, C current trend. Useful for detecting load patterns and overloads.

Active Power (W) — Total power consumption trend. Shows how load changes over time.

Frequency (Hz) — Grid frequency stability over time. Should stay very close to 50 Hz.

Tip: Charts start collecting data when you open the dashboard. The longer you keep it open, the more history you'll see (up to ~6 minutes of data per session).

Setting Up Alerts

The alert system notifies you when electrical parameters go outside safe ranges that you define.

Open Alert Settings

Select a device in the dashboard. Click the bell icon (🔔) in the device header, next to the Online status.

Configure Thresholds

For each parameter, you can set a Minimum and Maximum value. Enable or disable each alert with the checkbox.

Monitor Alerts

When any enabled parameter goes outside its range, a red alert banner appears at the top of the device panel. It tells you exactly what's wrong — for example: “Voltage A: 195.30V ⬇ below min 198V”.

Available Alert Parameters

Voltage A/B/C (198–253 V)

Phase voltage deviation

Current A/B/C (0–63 A)

Overcurrent protection

Frequency (49.5–50.5 Hz)

Grid stability

Power Factor (0.85–1.00)

Efficiency monitoring

Active Power (0–50000 W)

Overload detection

Note: Alert settings are saved in your browser and persist across sessions. Click “Reset to defaults” to restore factory thresholds.

Creating a Mesh Network

For large buildings or campuses, you can create a mesh network of multiple MeterDevice units covering an entire facility.

How It Works

Each floor gets one WiFi Gateway and up to 4 Meter Modules. All gateways on the same WiFi network share data through a single cloud account using the same API Key. The dashboard shows all meters organized by building and floor.

Plan Your Layout

For each floor, identify the electrical panels you want to monitor. Each panel gets one Meter Module. Place one WiFi Gateway per floor within WiFi range of all meters on that floor.

Install All Modules

Follow the standard installation steps for each meter module (DIN rail mount, CT clamps, voltage wires).

Connect All Gateways to the Same WiFi

During first-time setup, connect every WiFi Gateway to the same building WiFi network. They will all push data to the same cloud account.

Organize in the Dashboard

In the dashboard Device Tree, create your building structure: Building → Floors → Devices. Assign each device to its correct floor. The 3D building view will show the complete layout.

Recommended Setup Per Floor

WiFi Gateway

Central per floor

1–4

Meter Modules

Per electrical panel

3–12

CT Clamps

3 per meter module

Organizing Your Devices

The Device Tree lets you organize meters into a logical hierarchy that matches your physical layout.

Hierarchy Levels

CountryRegionCityBranchBuildingFloorDevice

Adding Items

Hover over any item in the tree and click the green + button to add a child node. The system automatically determines the correct child type.

Assigning a Device ID

When creating a Device node, enter the Device ID that matches your physical meter (e.g., METER_01). This links the tree node to the live data coming from that meter.

Editing & Deleting

Hover over any item to see the edit (pencil) and delete (trash) buttons. You can only delete items that have no children.

GPS & Location

If your device includes a GPS module, the dashboard shows its physical location on an interactive map.

What You'll See

An embedded dark-themed map with a pin at the device location. Below the map: latitude, longitude, altitude, speed, number of satellites, HDOP (accuracy indicator), and UTC time from the GPS module.

External Map Links

Click Google Maps or OpenStreetMap links below the map to open the location in a full map application.

Note: The GPS section only appears if the device sends location data. Indoor meters without GPS modules will not show this section.

Troubleshooting & FAQ

My device shows "No data received yet"

Make sure your API Key is registered in the dashboard (key icon in sidebar). Check that the WiFi Gateway has a solid LED (connected to WiFi). Power cycle the gateway if needed.

The 3D building view is not showing

The 3D view only appears when you select a node that is inside a building. Create a Building node in the tree, add floors and devices underneath it.

I don't see the GPS map

The map only appears if your device has a GPS module and is sending location data. Standard indoor meters do not include GPS.

How do I change my WiFi network?

Press and hold the reset button on the WiFi Gateway for 5 seconds. It will restart in setup mode, broadcasting the MeterDevice-XXXX network again. Re-configure through the captive portal.

Can I monitor multiple buildings?

Yes. Create separate Building nodes in the Device Tree for each location. All buildings appear in the same dashboard if they share the same account.

How do I update the device firmware?

Firmware updates are delivered automatically over WiFi (OTA). No action required from you. The gateway checks for updates periodically.

What happens if WiFi goes down?

The meter continues measuring and the gateway will buffer data locally. When WiFi reconnects, data is synced to the cloud automatically.

How accurate is the meter?

Class 1.0 accuracy for active energy (IEC 62053-21) and Class 2.0 for reactive energy. Voltage and current readings are within ±0.5%.

Can I export my data?

Use the "Detailed Device Info" button at the bottom of the device panel to view all raw data. Copy/paste or screenshot as needed. Full CSV export is coming soon.

Downloads

MeterDevice Product Sheet

PDF — Product overview and specifications

Need help? Contact us at info@tech404.am or try the Building Demo to explore the system interactively.