Precision Digital PD650 - Manual (Page 83)

Model PD650 Large Display Process Meter Instruction Manual
83
4-20 mA Output Operation
Overview
The meter can be equipped with an isolated 4-20 mA output option that can be
programmed to produce a 4-20 mA signal for virtually any process/rate display
with at least a 501 count span.
Lockout and Display Selection Operation
Overview
The meter provides the user with the ability to restrict modification of
programming values and to exclude menu titles from appearing during the menu
scroll. Restricting modification of the programming values is accomplished by
installing the lockout jumper (JP1). Excluding menu titles from the menu scroll is
performed with the display menu.
Note: Selections made through the display menu (dSPLAY) can be made with or
without the lockout jumper installed, but only become active when the lockout
jumper is installed.
Low Voltage Detector
The meter has a circuit, which monitors the line voltage. To protect against data
loss the meter will shut down, after saving the total, when the voltage falls below
specifications.
At power up the display normally flashes a test display of 188888 for a few
seconds. If the line voltage is below specifications the meter will flash 18888L
until the problem is corrected.