Model PD655 Large Display Process Meter
Instruction Manual
65
The four alarm status LEDs indicate alarm condition only and do not represent
relay status when set points are set up for non-latching relay mode. For instance,
if alarm 1 is programmed for a high alarm at 500 with manual reset of the relays
and the operator resets the relays when the display reads 650, the #1 LED will
stay on until the display falls below 500.
Set points setup for latching relay mode will reflect the status of the LEDs,
regardless of the status of the alarm condition. For instance, when a latching
relay is acknowledged the corresponding status LED will extinguish.
Two Types of Display: Process/Rate and Total
The meter also has the capability to display flow total by integrating the flow rate
input. The operator may toggle back and forth between flow rate and total
automatically or manually. When the meter is displaying rate, an LED labeled
R
on the right side of the front panel, illuminates to indicate this. There is no loss of
data while performing any of the programming or calibration operations; the
meter continues working in the background even when values are being
reprogrammed.
Figure 24.
Meter Displaying Process/Rate
Figure 25.
Meter Displaying Total
