Executing a mass utility meter upgrade across a municipality is a logistical minefield. A field technician isn't just swapping out a piece of brass; they are severing and re-establishing a continuous billing stream. If the final read on an old meter isn't explicitly tied to the starting read of the new unit—at the exact minute the swap occurs—the utility company will face immediate billing disputes. This Memento system operates as a rigid chain of custody for field telemetry, ensuring that the physical swap and the digital billing alignment happen simultaneously and flawlessly.
Locking the Billing Route
Before a wrench is turned, the technician must anchor their physical location to the administrative grid. The system bypasses generic street addresses by requiring the specific "billing_route" and the exact "meter_reference".
This administrative lock is paired with the physical "address" and any "reader_instructions" left by previous crews. It asks an immediate operational question: "Valve was off?". If a technician arrives and finds the valve already closed, logging it instantly protects the utility from claims that the crew arbitrarily shut off service. The system then forces a decision: "change_meter?". This boolean gate dictates whether the crew is performing a full hardware swap or just a telemetry upgrade, guiding the rest of the data entry process.
The Hardware Transition Matrix
The most dangerous moment in utility management is the hardware transition. This template forces a mathematically closed loop.
If a meter is being swapped, the technician must scan or input the "old_meter_number" and capture the final "old_meter_reading_kl". Only then do they input the "new_meter_no" and its starting "new_meter_reading_kl". The database demands classification of the "meter_type", forcing a selection from specific industrial models like "V100-5" or "MAG8000-100". Crucially, it timestamps the exact "meter_read_time". It applies this same rigorous logic to the telemetry equipment, asking "change_rtu?" before requiring the "old_rtu_serial" and the "new_rtu_type" (MRC1, ADC1, HP1).
Environmental Signal Diagnostics
Modern utility meters rely on radio telemetry to transmit data back to the central office. A successful physical installation is useless if the signal is blocked.
The back half of this database is dedicated to environmental signal auditing. It forces the technician to log the physical reality of the pit by answering boolean checks: "above_ground?", "metal_present?", "radio_obstruction?", and "water_obstruction?". If an RTU is installed in a flooded pit under a heavy steel lid, the network will fail to ping it. By capturing these specific environmental hazards alongside precise "lat_long" coordinates and up to five verification "photos", the utility company can proactively deploy signal repeaters or specialized antennas before the first billing cycle even runs.