AOIP OM 17 - C.4.5 Managing an Alarm Threshold: ALAr; C.4.6 Using the DB9 Connector: rS; C.4.7 Managing and printing Memory Content: mEm; a) General

MEASUREMENT
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OM 17
Managing an Alarm Threshold: ALAr C.4.5
a) General
The alarm programming menu offers the option of choosing two alarm thresholds. An alarm comprises a
value, a direction and a sound level setting for the buzzer, should the alarm become active. The direction
setting is used to choose whether the alarm becomes active below a user-entered trigger threshold or over it.
b) Successive Choices Available
The selection is made using the cursor keys.
 Choosing the alarm number: Alarm 1 or Alarm 2.
The previous choice is displayed (value, direction, buzzer).
 Choosing the alarm triggering direction: (down, up) icon.
 Choosing the buzzer sound level: (off, low, high) icon.
 Choosing the threshold value ignoring the decimal point.
Refer to entering a number.
 Choosing the unit and range in which the value is expressed.
Choosing a unit with the icon (mΩ, Ω ).
The range is chosen by moving the decimal point.
 Validating the new alarm setting: press the right arrow one last time.
The display moves on to alarm 2, otherwise it returns to the programming menu.
Icons
Icon meaning
Alarm triggering direction: up down
Buzzer sound level.
Remarks on threshold validation.
At any time, pressing ENTER will validate the alarm being changed.
At any time, pressing PROG will exit the alarm entry sequence without validating the changes made.
Using the DB9 Connector: rSC.4.6
This menu offers a choice of how to use the DB9 connector.
There are four possible choices, corresponding to four different functions.
Functions are selected using the cursor keys.
Various choices are possible:
OFF
Disable input and output functions via this connector.
This choice saves battery power.
TRIG
Trigger the remote measurement function.
PC
Activate an RS232 link between a computer and the unit.
Displays the COM icon.
VT100
Activate an RS232 link between a display terminal and the unit.
Displays the COM icon.
PRNT
Activate an RS232 link between a printer and the unit.
Displays the COM icon.
Choosing an RS232 link opens a sub-menu used to set the transmission speed between the unit and the
peripheral.
Speeds available : 4800, 9600, 19200, 31250 baud.
Imposed settings : 8 bits, no parity, 1 stop bit, hardware control (CTS).
Managing and printing Memory Content: mEm C.4.7
a) General
The memory is organised into 99 objects, each containing a maximum of 99 measurement tests.
The maximum number of measurements stored is approximately 1,500.