ST50 Plus Depth Operation and lnstaiiation Handbook
Chapter 5: CODE Lock Security
4.5 Display Contrast
The contrast can be adjusted to achieve optimum legibility at any angle.
- D e c r e a s e
-contrast ratio
1.
Momentarily press
and
ALARM
together.
5: CODE Lock
The ST50 Plus range incorporates an anti-theft feature called ‘CODE
Lock’. Designed to protect individual instruments or complete systems ir
vulnerable areas, ‘CODE Lock is a four digit number that you
into the permanent memory of a selected ‘master’ instrument.
Note:
A ‘master’ instrument is a digital unit on which the code number can be
entered, and then, if part of an integrated system, transmitted to other
ST50 Plus instruments.
This facility means that, should a CODE Locked instrument be removed
from a vessel without the owners permission, it cannot be operated
without the four digit security number.
CODE Lock’ can be used in one of three modes:
2. Press OFFSET or RESET to increase or decrease the contrast setting
(the range being between 1 and
Note:
A high setting will suit installations where the control head will be viewed from
3. Press DEPTH and
together momentarily to store the contrast
setting.
Mode 1: Off
As it leaves the factory ‘CODE Lock’ is set to off. In this mode the
instrument will operate normally when it is switched on, however, the unit
will not be protected by the anti-theft feature.
Mode 2: CODE Lock Once-Only Entry (page 25)
This mode is designed for systems with a digital ST50
instrument in
-a safe, belowdecks location. This instrument can then be used as a
‘master’ to enter the four digit code number, and automatically transmit
the code to all the instruments in
system when the power is switched
on. The advantage of this mode is that, with the master safely below
deck, code entry via the keypad is a
operation on installation.
r
Once ‘CODE Lock’ is set the system will operate normally as soon as the
power is switched on. In other words, the ‘CODE Lock’ securii number
is invisible.