Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
5-2
SERVICING Before servicing, disconnect power to prevent ignition of flammable or
combustible atmospheres. Substitution of components may impair intrinsic
safety
No maintenance is required beyond occasional cleaning of the enclosure with
a damp cloth. Solvents or bleaches should not be used. Do not modify or
repair the unit.
There are no spare parts for the Rosemount 3490 Series Control Unit. If a
problem persists, contact Rosemount, Inc. for advice.
HEALTH CHECKS This is a guide to system health check matters, which includes tests, Current
Input/Output calibration, live readings and diagnostic data for the 3490 Series
Control Unit, and for HART transmitters.
In addition, there is a guide to permanent data of the 3490 Series Control Unit
e.g. Serial Number.
Health Check: 3490
Series Control Unit
Simulation (Self-Test)
Menu:
MAIN MENU / SETUP / [CONTROL UNIT /] SYSTEM / TEST / SIMULATION
The Simulation (or Self-Test) function is selected by pressing the red
(ENTER) button at the SIMULATION screen.
To start, press the UP-ARROW button once.
When started, the PV value is driven up to the maximum value (P401) and
then driven down to the minimum value (P400), continuously, therefore
exercising the Current Output and relays. It always begins at the 4mA point.
A single cycle takes approximately 100 seconds to complete.
The operating mode of the 3490 Series Control Unit may Off-line or On-line,
although the outputs are frozen when Off-line. During this simulation, the
3490’s operations e.g. totalizing continue as normal.
To pause at any time, press the UP-ARROW button. When paused, pressing
the UP-ARROW button once will resume the cycle. You can also press the
DOWN-ARROW to pause, and press again to change direction of the cycle.
To quit at any time, even when paused, use the ESC button once to exit
immediately to the primary display. Upon exiting, the PV value immediately
takes on the value based on the transmitter inputs.
Display Test
Menu:
MAIN MENU / SETUP / [CONTROL UNIT /] SYSTEM / TEST / DISPLAY
The Display Test function is started by pressing the red (ENTER) button at the
DISPLAY screen.
When started, a pre-defined pattern sequence exercises all the LCD pixels.
After a few seconds, the test ends by displaying the 3490’s model code and
software version number.
To re-run the Display Test, press the red (ENTER) button again. Otherwise,
use the ESC button to exit to the menu.
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