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Bogdan Timofte
authored
2 months ago
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# UM34C Manual Working Summary
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This note summarizes the imported manual [`User_Manual_UM34C.pdf`](../Manuals/User_Manual_UM34C.pdf) as a working reference for the project.
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## Source Snapshot
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- imported file: `Documentation/Research Resources/Manuals/User_Manual_UM34C.pdf`
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- source filename: `User_Manual_UM34C.pdf`
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- pages: `12`
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- creator metadata: `Microsoft Word 2016`
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- SHA-1: `71f6ccae85ba6930e626208e24f66dead07d3e52`
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## Scope and Labeling Caveat
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The document should be treated as a family-level reference, not yet a clean single-model specification.
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Confirmed inconsistencies inside the PDF:
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- the source filename points to `UM34C`
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- the first instruction heading says `-Model: UM25/UM25C`
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- the technical parameter block says `Model: UM34/UM34C`
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- the app section is titled `UM34C Android APP Instruction`
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Working interpretation:
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- the manual most likely describes a closely related `UM25C` / `UM34C` family device
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- UI flow and user-facing features are likely reusable across the family
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- protocol details should not be assumed from this manual alone because it is operational documentation, not a transport spec
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## Confirmed Device Capabilities
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- color LCD display: `1.44 inch`
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- measurement ranges:
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- voltage: `4-24.00 V`
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- current: `0-4.000 A`
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- capacity: `0-99999 mAh`
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- energy: `0-99999 mWh` and `0-999.99 Wh`
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- temperature: `-10 C to 100 C`
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- refresh rate: `2 Hz`
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- quick-charge recognition claims support for:
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- `QC2.0`
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- `QC3.0`
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- Apple `2.4A / 2.1A / 1A / 0.5A`
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- `Android DCP`
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- `SAMSUNG`
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- port and hardware notes:
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- USB 3.0 `A male`
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- USB 3.0 `A female`
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- `Micro USB`
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- `Type-C input`
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- Bluetooth switch and Bluetooth status indicator are present on the `C` variant
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## Important Functional Notes
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### Measurement and storage
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- the main screen exposes voltage, current, power, temperature, accumulated `mAh`, accumulated `mWh`, load impedance, and current data-group index
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- the tester offers `10` data groups: `0-9`
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- groups `1-9` persist accumulated `mAh` and `mWh` across power cycles
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- group `0` behaves as temporary storage and is cleared when accumulation resumes beyond `1 mAh`
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- holding `PREV` clears the current accumulated `mAh` and `mWh`
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### Screen flow
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The manual describes six interface pages:
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- main measurement interface
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- quick-charge recognition interface
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- charging record interface
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- data cable impedance measurement interface
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- graphing interface
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- system parameter setting interface
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### Recording behavior
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- charging record mode auto-starts when current rises above a configurable trigger
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- trigger range: `0.01 A` to `0.30 A`
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- the device records accumulated capacity, energy, and elapsed time
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### Cable resistance measurement
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The cable test is a two-step differential measurement:
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1. connect the tester directly to the power supply and record voltage/current under load
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2. reconnect through the cable under test at the same load and record again
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Practical implications:
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- the manual recommends approximately `1 A` load for the test
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- if voltage drop is too high, the tester can brown out near `4 V`
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- after finishing the cable-resistance test, the manual says the tester must be power-cycled to return to normal measurement
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### Graphing
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- one graph view shows voltage and current over time
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- a second graph view shows `D+` / `D-` voltages over time
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### Settings
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User-facing settings documented in the manual:
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- auto screen-off: `0-9 min`
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- brightness: `0-5`
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- temperature unit: `C` / `F`
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- theme background color
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- theme foreground color
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## Android App Notes
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The manual includes an Android app section, but still at workflow level only.
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Confirmed app notes:
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- minimum Android version: `5.0`
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- pairing code: `0000` or `1234`
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- the app can:
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- connect over Bluetooth
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- export recorded data to phone storage
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- switch language
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- display graph pages
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- show quick-charge and `D+` / `D-` values
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- adjust brightness and screen-off timer
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- switch temperature units
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- clear current data group
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- rotate the tester display
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- adjust low-current trigger value
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## Relevance for This Project
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Useful as a product-behavior reference:
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- confirms the user-visible page model and feature set
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- confirms persistent data groups and their semantics
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- confirms graphing and recording features that may exist in app or payload state
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- confirms Bluetooth control exists on the `C` variant
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- confirms `D+` / `D-` readings and quick-charge mode are first-class features
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Not sufficient as a protocol reference:
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- no BLE services, characteristics, or packet format are documented
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- no field-level payload mapping is documented
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- no desktop or mobile transport framing is documented
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- no model-to-model compatibility table is documented
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## Working Assumptions
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- treat this manual as valid for shared UI concepts across at least part of the `UM25C` / `UM34C` family
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- do not treat quick-charge detection strings as authoritative protocol identifiers
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- do not assume the USB-C input is a full Type-C measurement path; the manual limits it to a narrower role
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- continue comparing runtime observations with this manual before promoting anything to a hard specification
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## Open Questions
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- whether `UM25C` and `UM34C` expose identical Bluetooth payloads
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- whether the Android app supports more device variants than the manual title suggests
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- whether the non-`C` variants share the same UI/page layout but without Bluetooth control
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