Startup And Operation Of Hazardous Area Oxymitter 4000 With Membrane Keypad; Power Up; Startup Display; Operating Display - Emerson Rosemount Oxymitter 4000 Reference Manual

Section 5
July 2018
Startup and Operation of Hazardous Area
Oxymitter 4000 with Membrane Keypad

Power Up

POWER UP

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.

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).
Figure 5-1. Defaults - Hazardous Area Oxymitter 4000 with LOI
Figure 5-1. Startup and Normal Operation
DIAGNOSTIC
ALARMS
CALIBRATION RECOMMENDED
TEST
POINTS
INC
HIGH
GAS
DEC
http://www.raihome.com
5-1
Startup and Operation with Membrane Keypad
Startup and Operation of
Hazardous Area Oxymitter 4000
with Membrane Keypad
Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5-1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5-2
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.
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).
HEATER T/C
HEATER
SW2
O2 CELL
CALIBRATION
J1
O2 CELL mV +
TP1
O2 CELL mv -
TP2
HEATER T/C +
TP3
HEATER T/C -
TP4
INC
CAL
LOW
GAS
TEST GA S +
TP5
DEC
PROCES S -
TP6
% O2
HEATER T/C
HEATER
O CELL
2
CALIBRATION
1 2 3
Lighting sequence during warm-up
HEATER T/C
HEATER
O CELL
2
CALIBRATION
1 2 3
Lighting sequence during normal operation
Rosemount Oxymitter 4000
4 1 2 3 4
(Startup display)
4 1 2 3 4
(Operating display)
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