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BASIC FEATURES AND FUNCTIONS 

• 

6 Personal Codes available. 

Keep notes on which code belongs to 

which user

 (Users: Master, User 1, User 2, User 3, User 4 and User 5). 

 

• 

The Mesa Model MSL-500 Electronic Lock is shipped from the factory 
with a factory set 

master code

. You should set the lock to your own 

unique master code 

immediately.

 

• 

If four incorrect entries are entered in a row, the keypad will 

shut down

 

for a period of 

five (5) minutes

. During this shut down period the keypad 

will not accept any codes.

 

• 

Programmable time delay function can be set from 01 minute to 59 min-
utes.

 

• 

Optional dual user mode, in this mode two separate codes will need to 
be entered to unlock safe. 

 

SAFE OPERATION AND PROGRAMMING 

 

Your 

MASTER CODE 

is factory set to: 1-2-3-4-5-6-7-8 

 

HOW TO OPEN YOUR SAFE 

Single User Mode 

(Default setting)

 

1.  Input: Code - #  

(light stays green for five (5) seconds)

 

2.  Turn the handle clockwise before the green light disappears. 

• 

Example: 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - #. 

• 

Invalid Code:  a solid red light along with five beeps. 

 
Dual User Mode 

(Please see SETTING SINGLE USER AND DUAL USER 

MODE on page 4 to use this mode)

 

1.  Input:1st Code - #  (lock will beep twice) 
2.  Input: 2nd Code - #  (light stays green for five (5) seconds) 
3.  Turn the handle clockwise before the green light disappears. 

• 

Example: 1st Code - # - 2nd Code - #. 

• 

Invalid Code:  a solid red light along with five beeps. 

 

Wrong try penalty

: If four incorrect entries are entered in a row,  

the keypad will 

shut down

 for a period of 

five (5) minutes

. During 

this shut down period the keypad will not accept any codes. 

Page 2 

Summary of Contents for MSL-500

Page 1: ...Better MESA SAFE than Sorry LOCK MODEL MSL 500 ELECTRONIC LOCK OPERATING INSTRUCTIONS...

Page 2: ...the lockout penalty wait five 5 minutes and check if the lock responds See Wrong try penalty on page 2 Replace the existing batteries with new ones See CHANGING YOUR BATTERIES on page 6 The Lock Is Re...

Page 3: ...k safe SAFE OPERATION AND PROGRAMMING Your MASTER CODE is factory set to 1 2 3 4 5 6 7 8 HOW TO OPEN YOUR SAFE Single User Mode Default setting 1 Input Code light stays green for five 5 seconds 2 Turn...

Page 4: ...1 5 ACTIVATE USER CODES Code length 3 8 digit code 1 Input lock will beep twice 2 Input 3 3 3 lock will beep twice 3 Input Current Master Code lock will beep twice 4 Input User User Specify which user...

Page 5: ...5 5 Re Input User light stays green for three 3 seconds Example 6 6 6 Master Code 5 5 This will delete User 5 Unsuccessful Code Change five beeps repeat steps 1 5 SETTING SINGLE USER AND DUAL USER MOD...

Page 6: ...e time delay period to 3 minutes Unsuccessful Code Change five beeps repeat steps 1 4 The Master Code will override the time delay How to open in time delay 1 Enter any valid code other than the Maste...

Page 7: ...ng wires out of housing 3 Carefully reinsert the new 9V alkaline battery do not force the battery into the compartment 4 The lock will retain all current codes and settings IMPORTANT DO NOT RETURN SAF...

Page 8: ...Better MESA SAFE than Sorry MESA SAFE COMPANY P O Box 52282 Irvine CA 92619 Phone 714 891 8356 Fax 714 891 8474 www mesasafe com sales mesasafe com...

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