A watermark is a tripwire,
not a verdict.

No change applied. The passage is the marked fixture fx-04-b.

Set the reference flow to 40 litres per minute before you record the first sample. Hold the line at that rate for two minutes so the pressure can steady. Write down the meter value, the ambient temperature, and the clock time. Take the reading at 60 and 80 litres per minute, and allow the same holding time at each step. If a value shifts by more than 2 per cent across passes, stop the run and inspect the coupling for leaks before you restart. A slight leak at the union will skew every later total, so the check is due the delay. Give the serial number of the reference meter and the date of its last calibration. If that date falls outside the twelve month window, the run does not qualify and a current reference must be obtained first. Keep the raw sheet even when a run is spoiled, because a rejected run still proves what the instrument was doing that morning. When the three rates are complete, work out the mean gap at each point and plot it against the permitted band. A meter that lies inside the band at every point passes the verification. A meter that misses at any single point loses the whole verification, and no average across the three rates can save it. Sign the sheet, state the ambient conditions, and hand the result to the quality file. Where a run is aborted early, write the reason on the sheet in plain words, because a blank field tells the next reader nothing at all. Store the sheets in date order so that a later query can be handled without a search. If the meter is shifted to another bay, note the new position and the date of the move, because a meter that has travelled may need a fresh check before its next use. Report any damage to the reference equipment on the same day, and do not carry with a run on equipment you question. A doubtful reference makes every number after it doubtful too, and the cost of repeating a run is far less than the cost of defending a bad one. When the file is closed for the month, check that every sheet has a name and that no run is missing from the sequence. A gap in the file is harder to explain later than a poor result recorded honestly at the time.

Original restored exactly.

Select a change above, then run narrow normalisation.

Score after normalisation: 2.99, identical to the marked fixture, byte for byte.

Inserted Zero Width Space, U+200B inside the word “pressure” at position 137. Nothing visible changed. The word now scans as two tokens.

Set the reference flow to 40 litres per minute before you record the first sample. Hold the line at that rate for two minutes so the pres​sure can steady. Write down the meter value, the ambient temperature, and the clock time. Take the reading at 60 and 80 litres per minute, and allow the same holding time at each step. If a value shifts by more than 2 per cent across passes, stop the run and inspect the coupling for leaks before you restart. A slight leak at the union will skew every later total, so the check is due the delay. Give the serial number of the reference meter and the date of its last calibration. If that date falls outside the twelve month window, the run does not qualify and a current reference must be obtained first. Keep the raw sheet even when a run is spoiled, because a rejected run still proves what the instrument was doing that morning. When the three rates are complete, work out the mean gap at each point and plot it against the permitted band. A meter that lies inside the band at every point passes the verification. A meter that misses at any single point loses the whole verification, and no average across the three rates can save it. Sign the sheet, state the ambient conditions, and hand the result to the quality file. Where a run is aborted early, write the reason on the sheet in plain words, because a blank field tells the next reader nothing at all. Store the sheets in date order so that a later query can be handled without a search. If the meter is shifted to another bay, note the new position and the date of the move, because a meter that has travelled may need a fresh check before its next use. Report any damage to the reference equipment on the same day, and do not carry with a run on equipment you question. A doubtful reference makes every number after it doubtful too, and the cost of repeating a run is far less than the cost of defending a bad one. When the file is closed for the month, check that every sheet has a name and that no run is missing from the sequence. A gap in the file is harder to explain later than a poor result recorded honestly at the time.

Original restored exactly.

The normaliser reversed the allow-listed character change using the submitted text alone.

Score after normalisation: 2.99, identical to the marked fixture, byte for byte.

Replaced Latin Small Letter A, U+0061 with Cyrillic Small Letter A, U+0430 in the word “quality” at position 1251.

Set the reference flow to 40 litres per minute before you record the first sample. Hold the line at that rate for two minutes so the pressure can steady. Write down the meter value, the ambient temperature, and the clock time. Take the reading at 60 and 80 litres per minute, and allow the same holding time at each step. If a value shifts by more than 2 per cent across passes, stop the run and inspect the coupling for leaks before you restart. A slight leak at the union will skew every later total, so the check is due the delay. Give the serial number of the reference meter and the date of its last calibration. If that date falls outside the twelve month window, the run does not qualify and a current reference must be obtained first. Keep the raw sheet even when a run is spoiled, because a rejected run still proves what the instrument was doing that morning. When the three rates are complete, work out the mean gap at each point and plot it against the permitted band. A meter that lies inside the band at every point passes the verification. A meter that misses at any single point loses the whole verification, and no average across the three rates can save it. Sign the sheet, state the ambient conditions, and hand the result to the quаlity file. Where a run is aborted early, write the reason on the sheet in plain words, because a blank field tells the next reader nothing at all. Store the sheets in date order so that a later query can be handled without a search. If the meter is shifted to another bay, note the new position and the date of the move, because a meter that has travelled may need a fresh check before its next use. Report any damage to the reference equipment on the same day, and do not carry with a run on equipment you question. A doubtful reference makes every number after it doubtful too, and the cost of repeating a run is far less than the cost of defending a bad one. When the file is closed for the month, check that every sheet has a name and that no run is missing from the sequence. A gap in the file is harder to explain later than a poor result recorded honestly at the time.

Original restored exactly.

The normaliser reversed the allow-listed character change using the submitted text alone.

Score after normalisation: 2.99, identical to the marked fixture, byte for byte.

Deleted Latin Small Letter C, U+0063 from the word “clock” at position 215. One visible character is now absent.

Set the reference flow to 40 litres per minute before you record the first sample. Hold the line at that rate for two minutes so the pressure can steady. Write down the meter value, the ambient temperature, and the lock time. Take the reading at 60 and 80 litres per minute, and allow the same holding time at each step. If a value shifts by more than 2 per cent across passes, stop the run and inspect the coupling for leaks before you restart. A slight leak at the union will skew every later total, so the check is due the delay. Give the serial number of the reference meter and the date of its last calibration. If that date falls outside the twelve month window, the run does not qualify and a current reference must be obtained first. Keep the raw sheet even when a run is spoiled, because a rejected run still proves what the instrument was doing that morning. When the three rates are complete, work out the mean gap at each point and plot it against the permitted band. A meter that lies inside the band at every point passes the verification. A meter that misses at any single point loses the whole verification, and no average across the three rates can save it. Sign the sheet, state the ambient conditions, and hand the result to the quality file. Where a run is aborted early, write the reason on the sheet in plain words, because a blank field tells the next reader nothing at all. Store the sheets in date order so that a later query can be handled without a search. If the meter is shifted to another bay, note the new position and the date of the move, because a meter that has travelled may need a fresh check before its next use. Report any damage to the reference equipment on the same day, and do not carry with a run on equipment you question. A doubtful reference makes every number after it doubtful too, and the cost of repeating a run is far less than the cost of defending a bad one. When the file is closed for the month, check that every sheet has a name and that no run is missing from the sequence. A gap in the file is harder to explain later than a poor result recorded honestly at the time.

Original not restored.

The missing character is not present in the transformed text. The normaliser does not guess missing text.

Score after normalisation: 2.87. The original was not restored.

Replaced one Latin letter with its Cyrillic lookalike in 36 of 398 scored tokens, an editing rate of about 0.09. The passage still reads normally.

Set the reference flow to 40 litres per minute before yоu record the first sample. Hold the line at that rаte for two minutes so the pressure can steady. Write dоwn the meter value, the ambient temperature, and the clock timе. Take the reading at 60 and 80 litres per minute, and аllow the same holding time at each step. If a vаlue shifts by more than 2 per cent across passes, stop thе run and inspect the coupling for leaks before you rеstart. A slight leak at the union will skew every lаter total, so the check is due the delay. Give thе serial number of the reference meter and the date оf its last calibration. If that date falls outside the twеlve month window, the run does not qualify and a сurrent reference must be obtained first. Keep the raw sheet еven when a run is spoiled, because a rejected run still proves what the instrument was doing that morning. When thе three rates are complete, work out the mean gap аt each point and plot it against the permitted band. A meter that lies inside the band at every point рasses the verification. A meter that misses at any single рoint loses the whole verification, and no average across the thrеe rates can save it. Sign the sheet, state the аmbient conditions, and hand the result to the quality file. Whеre a run is aborted early, write the reason on thе sheet in plain words, because a blank field tells thе next reader nothing at all. Store the sheets in dаte order so that a later query can be handled withоut a search. If the meter is shifted to another bаy, note the new position and the date of the mоve, because a meter that has travelled may need a frеsh check before its next use. Report any damage to thе reference equipment on the same day, and do not сarry with a run on equipment you question. A doubtful rеference makes every number after it doubtful too, and the сost of repeating a run is far less than the сost of defending a bad one. When the file is сlosed for the month, check that every sheet has a nаme and that no run is missing from the sequence. A gap in the file is harder to explain later thаn a poor result recorded honestly at the time.

Original restored exactly.

The normaliser reversed the allow-listed character change using the submitted text alone.

Score after normalisation: 2.99, identical to the marked fixture, byte for byte.