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PSM1700 PsimetriQ user manual

4-4

4.4 Alarm function

PsimetriQ has two independent alarms that can be read

remotely or can generate an audible sound Each of the

alarms can be triggered by comparison to one or two

thresholds:

sound the alarm if the value exceeds a threshold

sound the alarm if the value is below a threshold

sound the alarm if the value is outside a window

sound the alarm if the value is inside a window

Additionally, one of the alarms can be used to generate a

sound which varies linearly between thresholds

The value to which each alarm is applied can be any of the

measurements selected for zoom. The alarm status is also

available as a logic output on the parallel port.

To program an alarm, first select the functions for the

zoom; up to four measurements can be selected for the

display, the alarm is applied to any of them; then press

ALARM to invoke the alarm menu:

select which of the zoom functions is to be used

select the type of alarm

set the upper limit (if appropriate)

set the lower limit (if appropriate)

select whether the alarm is to be latched

select whether the alarm sounder is enabled

If the alarm latch is selected then the alarm will continue

to sound even if the value returns to within the normal

boundaries. To clear the alarm, press HOME.

The linear alarm option allows tests to be carried out even

if it is not possible to see the display. Pressing ZERO in the

alarm menu sets the upper and lower threshold to 4/3 and

Newtons4th PSM1700 User Manual

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