> ## Documentation Index > Fetch the complete documentation index at: https://docs.gasos.ng/llms.txt > Use this file to discover all available pages before exploring further. # Meters and photos > Reading digital and mechanical meters, meter photos, and what to do when a meter rolls over or is replaced. ## Read the totaliser Read the meter's running total, not the last sale. * **Digital meters** often show the total over two lines, like `2947` over `582.823`. Type it as one number: `2947582.823`. * **Mechanical meters** show whole litres. Ignore the last wheel if it's half turned. The opening reading comes from the last sheet and can't be typed over. Gasos works out the litres and the naira. ## Photos ### When to take them At close, after you type each closing reading. The sheet asks for: * a photo of **every closing meter**, showing the reading; * a photo of the meter at a **price change**; * the **waybill** for each fuel delivery; * each POS or transfer **settlement slip**; * receipts for expenses, if you have them. A missing required photo shows under **Checks**, and the day can't be submitted until it's taken. The Meters section counts them as you go ("12 of 16 meter photos taken"). ### How to take them Tap **Take photo** next to the reading. On a phone this opens the camera: hold it straight on, close enough that every digit is sharp, without glare. To use a photo already on the device, tap the upload icon beside it. The photo shows straight away with a percentage while it uploads. Got it wrong? Tap **Retake**. ### Gasos reads the photo Once a meter photo has uploaded, Gasos reads the totaliser from it: * Took the photo first? Gasos shows **The photo reads 624,712 L**. Check it against the meter, then tap **Use** to fill it in, or type it yourself. * Typed the reading first? Gasos checks it against the photo. **Matches the photo** means you're done. If they differ, look at the meter again and correct whichever is wrong. * If the photo can't be read (glare, blur, too far away), retake it closer and straight on. A reading that differs from its photo shows under **Checks** as a warning, and the reviewer sees both figures in the photo viewer. It never stops you submitting: you know the meter, the photo is a second pair of eyes. ### No signal Keep going. The photo is kept on the phone, marked **waiting**, and uploads by itself when the connection returns, before the readings it belongs to. Don't clear the browser or switch phones until the sheet says **Saved**. ### Where they're kept Photos are made smaller on the phone (so they upload quickly and the digits stay readable) and stored privately in Gasos's storage on Cloudflare. Only people in your company who can see that station's sheets can open them; there are no public links. ### Checking photos (reviewers) Tap any photo to open it large. The viewer shows what was typed on the sheet beside it, for example "On the sheet: 624,712 L", so you can compare digit for digit. Use **Next** and **Previous** (or the arrow keys) to go through all the day's photos, and tap the photo to zoom. The **Photos** section near the end of the sheet shows every photo in one grid, grouped by meters, hand-over, deliveries and money, with any still missing listed underneath. If a photo doesn't match its reading, raise a query on that line. ## A reading lower than the opening A meter only goes backwards when it rolls past its last digit, is reset, or is replaced. Gasos won't accept a lower reading on its own: choose **Explain the meter**, say what happened, and (for a reset or replacement) enter the old meter's last reading and where the new one started. ## An idle nozzle Still enter its reading (the same as its opening) and take the photo, so the reviewer knows it was checked. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.