^{Maintenance：}

^{The storage conditions of the tape and the temperature and humidity of the site where the experiment is performed should be controlled within a certain range. Temperature range: 2 3 ± 2 ℃, please store in a dry and cold place; Humidity range: 50 ± 10% Check whether the cross section of the O-ring of the instrument is still round, or has become flat, or hardened, or appears Cracked, or used for more than 6 months? If the latter 4 situations occur, please replace the O-ring. After testing, the round roller where the O-ring is located needs to be cleaned every day. If it is not cleaned in time, the round shaft may not be able to rotate freely. The tape can only be used once, because the tape has been used The wearability will change after one time. In addition to the tapes produced by Norman tool company in the United States, there are many manufacturers of nominal MORMAN tapes in the domestic market. The user is solemnly reminded that the test results using these tapes cannot be guaranteed by Norman tool company in the United States, and the most important thing is that serious deviations may occur and eventually cause economic losses.}

^{Product parameters:}

^{4” Wide Tape – Single Roll
¼’’W × 7’’D Reel, 1 Roll, 5 Lbs
Harmonized Code 9024.90
The tape is 1200 feet long (about 366 meters).}

<sup>Precautions:

In order to protect the interests of users, the method of judging whether the tape is produced by Normantool Company is introduced as follows:
Method 1: "Norman tool USA" is printed on the inner core of the original tape;
Method 2: Test with the original Norman Tool Inc calibration plate. This calibration plate has been calibrated on Norman Tool's master machine and comes with a certificate indicating the number of turns required to wear the tape through the calibration plate.
(When you need to buy some calibration plates, you need to provide the serial number of your original RCA machine) Put the calibration plate in the position of the test sample and measure the number of turns required for the tape to wear through the coating on the calibration plate to see if Match the number of laps on the certificate.
The error of the test is allowed within 5%-10%. If the test result of the tape is more than 10% indicated on the certificate, it can be judged that the tape is not produced by Norman tool Corporation of America.</sup>

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