Startup And Operation Of Hazardous Area Oxymitter 4000 With Membrane Keypad; Power Up; Figure 5-1. Startup And Normal Operation - Emerson Rosemount Analytical Oxymitter 4000 Instruction Manual

Hazardous Area Oxymitter 4000
OF HAZARDOUS AREA OXYMITTER 4000
5-1

POWER UP

a. Startup Display
When power is applied to the probe, the cell
heater turns on. It takes approximately one
half hour for the cell to heat to operating
temperature. This condition is indicated by
the top four LEDs (DIAGNOSTIC ALARMS)
on the membrane keypad (Figure 5-1).
Starting with the CALIBRATION LED, the
LEDs light in ascending order until all four
LEDs are on. At this point, all four turn off
and the cycle starts again. This ramp cycle
continues until the cell is up to operating
temperature.
HEATER T/C
DIAGNOSTIC
ALARMS
CALIBRATION
CALIBRATION RECOMMENDED
TEST
POINTS
INC INC
HIGH LOW
GAS GAS
DEC DEC
Rosemount Analytical Inc. A Division of Emerson Process Management
SECTION 5
STARTUP AND OPERATION
WITH MEMBRANE KEYPAD
HEATER SW2
O2 CELL
J1
O2 CELL mV +
TP1
O2 CELL mv -
TP2
HEATER T/C +
TP3
HEATER T/C -
TP4
CAL
TEST GAS +
TP5
PROCESS -
TP6
% O2

Figure 5-1. Startup and Normal Operation

b. Operating Display
The ramp cycle turns into a cycle where the
diagnostic LEDs light in sequence from the
top to the bottom, one at a time. After the
bottom LED turns on, the sequence starts
again at the top with the HEATER T/C LED
(Figure 5-1).
c. Error
If there is an error condition at startup, one
of the diagnostics LEDs will be blinking.
Refer to Section 8 TROUBLESHOOTING,
to determine the cause of the error. Clear
the error, cycle power, and the operating
display should return.
HEATER T/C
HEATER
O CELL
2
CALIBRATION
1 2 3
LIGHTING SEQUENCE DURING WARM-UP
(STARTUP DISPLAY)
HEATER T/C
HEATER
O CELL
2
CALIBRATION
1 2 3
LIGHTING SEQUENCE DURING NORMAL OPERATION
(OPERATING DISPLAY)
Startup and Operation with Keypad
Instruction Manual
IB-106-340C Rev. 4.1
July 2004
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5-1