GRAPHTEC gl820 User Manual page 87

(13) To cancel key lock by password
A password can be set to GL820 to cancel the key lock.
(No password is set at factory default.)
<Operation flow>
1. Set the password.
2. Set the password.
Hold down the and
3. Cancel the key lock.
Hold down the and
The password setting screen shown below will be displayed. Set a password.
Entering an incorrect password will not cancel key lock.
Key lock state will be retained when power is turned off.
Press the , , and ENTER keys at the same time to display
the password setting screen shown below. Specify a 4 digit
password.
Use the , , ,
key to confirm the password.
Specifying 0000 will disable password operation.
In case you forgot your password, please contact us to
acquire the master password.
keys together for at least two seconds.
keys together again for at least two seconds.
CHAPTER 3 Settings and Measurement
keys to select numbers. Press the ENTER
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