ABUS Technologies A1500 Universal Process Indicator - Manual (Page 14)

ABUS TECHNOLOGIES INC.
14
A1500
8. OPERATION
For best results, this indicator requires correct setting of parameters as input
type (T/C, Pt100, 4-20mA, etc), alarms triggering point, alarm function, etc. These
parameters are divided in five levels or groups of parameters which we will refer to as
Cycles.
S.NO. CYCLE ACCESS
1 Work Free Access
2 Alarms
3 Functions
4 Configuration Reserved Access
5
Customized
Linearization
6 Calibration
Table-4: Parameter Cycles
The work cycle has free access. All other cycles require a certain combination
of key strokes to be accessed. The combination is and keys, when pressed
simultaneously within the cycle chosen, just press to go to the subsequent
parameters of this cycle. At the end of each cycle the display will go back to the work
cycle.
After reaching the intended prompt just press or key to change this
parameter accordingly. All changes are recorded in non-volatile memory as we move
to next prompt. After 25 seconds with no key pressed the indicator will return to the
measuring cycle (work cycle).
8.1 Configuration Protection
As safety measure, changes can be prevented by a combination of keys for each cycle. The
protected parameters could be still viewed but not changed.
 To protect a cycle, just press and keys simultaneously for 3 seconds, at the
beginning of the referred cycle.
 To unlock this cycle just press the same keys again for 3 seconds. The display will briefly flash
confirming that the cycle was locked or unlocked.
 For further protection, the unlock operation through the keypad may be disabled by changing
the position of an internal strap inside the indicator:
 When PROT is OFF, the user is allowed to lock and unlock the cycles using the keypad as
explained above.
 If PROT is ON, the cycles lock/unlock operation is disable.