Edgetech PPM1, Руководство оператора, Страница: 17 / 29

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5.4.4 PROGRAMMING THE ALARM RELAYS
Next, you will be given the opportunity to modify the alarm settings if you wish.
Again you do not have to go back to the main menu, since the next step will
automatically put you in this mode.
The PPM1 and PPM2 have two alarms. They are Form A, (single-pole, single-
throw) normally open. You can make them correspond to any of the available
measured or calculated measurement parameters. You can independently
program the “ON” point and the “OFF” point for each relay. To enter the menu,
press “C” for C)hange.
You will then see the window shown below. In this example, we would like to
change Alarm 2. Note that it is now set for Dew Point in °C, and the relay
switches at 0.0 degrees. We are going to change it so that the alarm is now on
Dew Point in °F. We want the relay to open when the measurement is above
25°F, and we want it to close when the measurement is below 24°F. Therefore,
press “C” for C)hange.
You will no
w see the window shown here. Press “2” to select Alarm 2.
As before, you can use the Space Bar to select the desired unit and the Enter
key to lock it in. You can also choose to Enable or Disable any alarm. See the
following window.