Coin Calibration for Piso WiFi: How Operators Set ₱1, ₱5, and ₱10 Correctly
Answer first: Teach ₱1, ₱5 and ₱10 separately with clean sample coins, check the pulse count for each denomination in the admin panel, and test each denomination as a customer. Recalibrate only when a denomination is rejected frequently or credits the wrong time consistently, and do not recalibrate blindly for a single customer report.
Part of the Business pillar: Piso WiFi Business · Related: Coin Slot Not Working · Coin Counted Twice
Coin calibration is the operator procedure that teaches a coin selector which coins to accept, and how much time each coin should credit. When calibration is correct, a ₱1 coin credits ₱1 time, a ₱5 coin credits ₱5 time, and a ₱10 coin credits ₱10 time, according to the rates set in the admin panel. When calibration is wrong, coins can be rejected, kept without credit, or credited with the wrong time, even if the rates on the sign are correct.
This post is an operator procedure guide, not a customer troubleshooting guide. For customer problems, such as a coin not crediting, see the Coin Slot Not Working post, which explains what to report and what not to do. For rates in general, see the Rates pillar. For machine setup in general, see the Machine Setup post. Customers should not open a machine, adjust a coin selector, or change wiring. Calibration, cleaning inside, and wiring are operator only tasks, carried out with the machine powered safely and according to the supplier manual.
What Calibration Actually Sets, and What It Does Not Set
Calibration sets how the coin selector recognises a coin, usually by size, weight, and material, and how many pulses, or signals, that coin sends to the control board for each denomination. Rates are set separately in the admin panel, where the operator maps a pulse count, or a coin value, to a time amount. If either side is wrong, the customer result is wrong, even if the other side is correct.
| If this is wrong | What the customer sees | What to check first |
|---|---|---|
| Coin selector calibration | A valid coin is rejected, a valid coin is kept without credit, or a coin credits the wrong time | Sample coins, pulse settings, and sensor condition, as described below |
| Admin rate mapping | A coin credits, but the time does not match the sign, for all coins or for one denomination | Rate table in the admin panel, and whether the rate was changed without updating the sign |
| Coin pulse count mismatch | A coin credits, but the time is consistently wrong by a fixed amount, for example half or double | Pulse count per denomination in the admin panel, compared with the selector setting, and a test with each denomination |
| Dirty sensor, loose wiring, or low voltage | Coins work sometimes, fail sometimes, or fail after a period of good use | Sensor cleaning, wiring, and power checks, as operator only tasks, as explained in the Coin Slot Not Working post |
Do not change rates to hide a calibration error, and do not change calibration to hide a rate error. Fix the side that is actually wrong, test each denomination, and update the sign only when both sides match.
Before You Calibrate: Safety, Sample Coins, and a Baseline
Before you start, do the following, in order, and record the results. Calibration without a baseline can make a working machine worse, because you will not know whether a change helped or hurt.
- Record the current rates from the admin panel and from the sign, and note any difference between them.
- Record the current pulse or coin value settings from the admin panel and from the selector documentation, if available, for ₱1, ₱5, and ₱10 separately.
- Collect clean sample coins for each denomination you accept, in good condition, not bent, dirty, or worn, because a worn sample coin can teach the selector the wrong profile.
- Test the machine as a customer, with a small payment in each denomination, and record what time each coin actually credited, and whether any coin was rejected or kept without credit.
- Check power and wiring safely, according to the supplier manual, because low voltage, loose wiring, or a missing common ground can look like a calibration problem, as explained in the Machine Setup post and the Coin Slot Not Working post.
If the machine has a recent power cut, update, or move, note that too, because those events can precede a calibration or settings problem, and they help a supplier diagnose the issue if you need help.
Calibration Procedure, in General Terms
Exact buttons, menus, and sample coin steps vary by coin selector model and platform, so follow your selector manual and your platform documentation for your exact model, rather than copying steps from a video for a different model. The general procedure below is a framework to follow with your manual open, not a replacement for that manual.
Step 1: Enter calibration mode safely
Follow your selector manual to enter calibration mode, with the machine in a safe state for maintenance, and with no customer payment in progress. Do not calibrate while customers are paying, because a payment during calibration can be lost, miscredited, or recorded incorrectly.
Step 2: Teach each denomination separately, with clean sample coins
Teach ₱1, ₱5, and ₱10 separately, using clean sample coins for each denomination, in the order given by your manual. Do not teach a denomination with a coin from another country, a token, or a worn coin, because the selector will learn the wrong profile and will then reject good coins or accept wrong coins.
After teaching each denomination, check that the selector recognises that coin consistently, not just once. A single successful test is not enough, because a borderline calibration can pass once and fail on the next coin.
Step 3: Check pulse counts in the admin panel
After teaching the selector, check the pulse count, or coin value, for each denomination in the admin panel, and compare it with the selector setting and with the rate table. A common mistake is teaching the selector correctly, but leaving a pulse count that maps a ₱5 coin to ₱1 time, or a ₱10 coin to ₱5 time, or vice versa. Fix the mapping, not the selector, if the selector recognises the coin but the time is wrong by a fixed amount for that denomination.
Step 4: Test as a customer, denomination by denomination
Test as a customer, with a small payment in each denomination, and record the time credited for each coin, compared with the sign and with the admin rate table. Test each denomination at least a few times, because a calibration problem that affects only some coins will be missed by a single test.
| Denomination tested | Time shown on sign | Time actually credited | Result |
|---|---|---|---|
| ₱1 | Match, or fix needed | ||
| ₱5 | Match, or fix needed | ||
| ₱10 | Match, or fix needed |
If all three denominations match, calibration is done for now, and you should record the date, the sample coins used, and the pulse settings, so the next calibration can be compared with this one. If one denomination fails, recalibrate that denomination only, with a clean sample coin, and test it again, rather than recalibrating all denominations blindly.
Step 5: Update the sign, and tell staff what changed
If rates, pulse mapping, or accepted denominations changed during calibration, update the sign on the same day, and tell staff what changed, so customers are not told the old rate or the old accepted coin list. A sign that does not match the machine will create complaints that look like calibration problems, even after calibration is correct.
When to Recalibrate, and When Not To
Recalibrate when: a denomination starts being rejected frequently, a denomination credits the wrong time consistently, new coins in circulation differ from your sample coins, a coin selector was replaced or moved, or a supplier manual recommends recalibration after a specific event, such as a firmware update that affects coin handling.
Do not recalibrate blindly when: only one customer reports a problem, and other customers with the same denomination succeed, because that case may be a worn coin, a wrong network, or a portal problem, not calibration; when the problem is a portal not loading, a voucher problem, or a speed problem, because those are not coin selector problems; or when the machine has a power, wiring, or sensor fault that calibration cannot fix. In those cases, diagnose first, using the Troubleshooting pillar and the Coin Slot Not Working post, and calibrate only if the diagnosis points to calibration.
Common Calibration Mistakes, and How to Avoid Them
| Mistake | Why it causes problems | How to avoid it |
|---|---|---|
| Using worn, dirty, or wrong coins as samples | Selector learns the wrong profile, then rejects good coins or accepts wrong coins | Use clean, good condition sample coins for each denomination, and replace samples when they wear |
| Calibrating while customers are paying | Payments during calibration can be lost or miscredited, and test results will be unreliable | Calibrate at a quiet time, with a clear out of service note if needed, and no payment in progress |
| Changing rates to hide a calibration error | Rates will then be wrong for correctly calibrated coins, and for vouchers that use the same rate table | Fix calibration first, then check rates, then test each denomination as a customer |
| Changing calibration to hide a rate error | Calibration will then be wrong for the correct rate table, and the next rate change will break it again | Fix the rate mapping first, if the selector recognises the coin but the time is wrong by a fixed amount |
| Not recording settings and test results | The next calibration, or a supplier help call, will start from zero, and a repeat problem will look new | Record date, sample coins, pulse settings, rate table, and test results for each denomination, in one log |
Frequently Asked Questions About Coin Calibration
What is coin calibration, in plain terms?
Coin calibration teaches a coin selector which coins to accept, and how much each coin should credit, by using sample coins for each denomination, and by checking the pulse or coin value mapping in the admin panel. Rates are set separately in the admin panel, and both sides must match for a coin to credit the time shown on the sign.
How often should I calibrate a coin selector?
Calibrate when a denomination starts being rejected frequently, credits the wrong time consistently, or after a selector replacement, a move, or a supplier recommended event. Do not calibrate on a fixed daily schedule if the machine is working well, because unnecessary recalibration can introduce errors. Record each calibration, so you can see whether a problem is new or repeat.
Why does a ₱5 coin credit ₱1 time, or vice versa?
That pattern usually points to a pulse count or rate mapping mismatch for that denomination, rather than a dirty sensor, because the coin is recognised but mapped to the wrong value. Check the pulse count for that denomination in the admin panel, compare it with the selector setting, fix the mapping, and test that denomination as a customer, several times, before you recalibrate the selector.
Why does calibration work for one coin, but fail for the next coin of the same value?
That pattern can point to worn or dirty sample coins, a borderline calibration, a dirty sensor, or a power or wiring fault, rather than a rate error. Use clean sample coins, test several coins of the same denomination, and check sensor, wiring, and power as operator only tasks, as explained in the Coin Slot Not Working post, before you recalibrate again.
Can customers calibrate a coin selector themselves?
No. Calibration, cleaning inside, and wiring are operator only tasks, carried out safely and according to the supplier manual. Customers should report the coin, the time credited if any, and whether the same coin worked before, as explained in the Coin Slot Not Working post, and should not open the machine or adjust wiring.
Should I clean the coin selector with alcohol?
Cleaning a coin reader sensor is an operator only task, and it should follow the supplier manual for your exact selector model, including what cleaning material, if any, is recommended. Do not spray cleaning fluid into a machine, do not use a material the manual does not recommend, and do not clean inside a machine while customers are paying. If cleaning does not fix a consistent calibration problem, check sample coins, pulse mapping, wiring, and power, in that order, and contact your supplier with your calibration log.
What to Read Next
For coin problems from a customer point of view, go to the Coin Slot Not Working post. For rates in general, go to the Rates pillar. For machine setup, go to the Machine Setup post. For power and session problems, go to the Troubleshooting pillar and the Power Backup and UPS post. For admin steps in general, go to the Admin Login guide.