13
Model PD750, PD751, PD752 Universal Temperature Meters
Instruction Manual
4 ALARM POINTS (
Alars
)
The meter is equipped with 4 alarm points as a standard feature. Each alarm may
be programmed for either a high or low alarm and for 0-100% deadband. Front
panel LEDs indicate alarm status.
Options for 2 and 4 relays are available.
To program a high alarm, program the set point above the reset point. To program a
low alarm, program the set point below the reset point.
To program the alarm deadband, set the reset point above or below the set point by
an amount equal to the desired deadband value.
Example: Alarm 2 is a high alarm that trips at 1500° and has a deadband of 100°
Alarm 2 set point is set at 1500° and its reset point at 1400°
Alarm Set and Reset Point Programming (
Alars
)
Alarm set and reset point programming is performed in the
Alars
routine.
1. To enter the
Alars
routine, press
ENTER
and when
Alars
appears, press
ENTER
again. This starts a scan of the 4 alarm set and reset points.
The scan sequence begins with a flashing display of alarm #1 set point. The “1”
LED and “S” LED are illuminated to indicate the meter is flashing alarm #1 set point
value.
2. All digits flash for 3 seconds.
If this is the desired display for this alarm point, press
ENTER
. Pressing
ENTER
completes this alarm point programming. Proceed to step 8 for
next alarm point programming.
If this is not the desired display, wait for the first digit to flash. It will flash
for 3 seconds before it starts to scroll.
3. If the first flashing digit is OK, press
ENTER
before it starts to scroll to accept it,
the next digit flashes- go to step 6. If not OK, wait for first digit to scroll.
4. When the first digit is OK, press
ENTER
and the next digit flashes for 3 seconds
before it starts to scroll.
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