©
Copyright 2014, Sargent & Greenleaf
Page 5
O
perating
i
nstructiOns
S&G
™
Model 2740B
Electromechanical Safe Lock
d
Ial
c
alIbratIon
— n
o
c
hange
k
ey
r
equIred
A new, uncalibrated lock will sound three quick beeps...pause...sound another three quick beeps...pause...and sound another three quick beeps
whenever the dial is turned. It’s quite aggravating, as it’s intended to be. This is the lock’s way of insisting that the dial be calibrated to zero
so that it has a solid, reliable reference point for determining what numbers are being dialed during setup and daily usage. Fortunately, dial
calibration is easy and requires no special tools.
The change key should NOT be inserted in the lock.
Turn the dial right (clockwise) a few revolutions. On each revolution (more or less) one long beep (
brap
) will sound. When you’ve turned the dial
right two or more revolutions*, a single short beep followed by a series of short beeps will sound. After the series of short beeps sound, continue
turning the dial right precisely to zero. If you dial past it (even slightly), continue dialing right until it comes to the index mark again. Once you’ve
stopped precisely on zero, turn the dial left a full revolution, stopping precisely to zero. Again, if you dial past it (even slightly), continue dialing
left until it comes to the index mark again. Once you’ve stopped precisely on zero, reverse dial direction and turn right precisely to zero again.
By now you know the drill. Keep turning left and right precisely to zero until the lock sounds five quick beeps. This means you’ve successfully
calibrated the dial to zero. The key to success is to dial very, very precisely.
The 2740B lock can be calibrated to zero anytime, and it’s a good idea to do so whenever you find it takes more than one or two attempts to dial
open the lock, even though you are being very careful and staying focused while dialing. It takes less than a minute to calibrate the dial to zero.
* The number of revolutions you must turn before hearing the short beep followed by a series of short beeps varies depending on the speed of dialing. Faster dialing means fewer turns, slower
dialing means more turns.
b
attery
c
ondItIon
c
heck
— n
o
c
hange
k
ey
r
equIred
The change key should NOT be inserted in the lock.
Turn the dial right (clockwise) a few revolutions. On each revolution (more or less) one long beep (
brap
) will sound. When you’ve turned the dial
right two or more revolutions*, a single short beep followed by a series of short beeps will sound. Batteries at or near full capacity will sound
four short beeps after the initial short beep. If only two beeps sound, batteries are at about half capacity, and you would be wise to think about
replacing both of them in the near future (see battery change section).
After the battery condition beeps sound, do not turn the dial for ten seconds to give the lock time to exit the battery test mode.
* The number of revolutions you must turn before hearing the short beep followed by a series of short beeps varies depending on the speed of dialing. Faster dialing means fewer turns, slower
dialing means more turns.
l
ow
b
attery
w
arnIng
If you enter a valid combination and on the final turn of the dial to the right to retract the lock bolt the lock sounds ten quick beeps...pauses...
sounds another quick ten beeps...pauses...then sounds another quick ten beeps, the lock is signalling a low battery condition. Replace the lock
batteries immediately (see battery change section). If you continue to operate the lock with low batteries, it will sound the low battery signal
on each subsequent opening. It will do this for approximately one hundred openings, then go into
Lock Open Latch
. Now it will not be possible to
place the 2740B into locked condition, and the container cannot be secured.
