Instruction Manual

IB-106-340 Rev. 3.0 December 2003

Oxymitter 4000

 

 

 

 

 

 

 

 

 

d. Electrostatic Discharge

 

 

 

 

 

 

 

 

 

 

Install all protective equipment covers

 

Electrostatic discharge can damage the ICs

 

and safety ground leads after trouble-

 

used in the electronics. Before removing or

 

shooting. Failure to install covers and

 

handling the processor board or the ICs,

 

ground leads could result in serious

 

ensure you are at ground potential.

 

injury or death.

8-3

ALARM INDICATIONS

 

 

 

 

 

 

 

 

8-2 GENERAL

The majority of the fault conditions for the

 

 

 

 

 

 

 

 

 

Oxymitter 4000 with a membrane keypad will be

 

The troubleshooting section describes how to

indicated by one of the four LEDs referred to as

 

diagnostic, or unit, alarms on the operator’s

 

identify and isolate faults that may develop in

 

keypad, Figure 8-2. An LED will flash a code

 

the Oxymitter 4000. Additional troubleshooting

 

that will correspond to an error message. Only

 

information is provided in paragraph 8-7for

 

one LED will blink at a time. An alarm code

 

those units with the optional SPS 4000. When

 

guide is provided inside the screw on cover for

 

troubleshooting the Oxymitter 4000, reference

 

the electronics.

 

 

 

 

 

 

 

 

 

the following information

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

a.

Grounding

Alarm indications will also be available via the

 

optional LOI or the HART Model 275/375 hand-

 

 

 

 

 

 

 

 

 

 

 

It is essential that adequate grounding pre-

held communicator and Rosemount’s Asset

 

 

cautions are taken when installing the sys-

Management software. When the error is cor-

 

 

tem. Thoroughly check both the probe and

rected and/or power is cycled, the diagnostic

 

 

electronics to ensure the grounding quality

alarms will clear or the next error on the priority

 

 

has not degraded during fault finding. The

list will appear.

 

 

 

 

 

 

 

 

 

 

system provides facilities for 100% effective

 

 

 

 

 

 

 

 

 

 

 

 

 

grounding and the total elimination of ground

 

 

 

 

 

 

 

 

 

 

 

 

 

loops.

 

 

 

 

 

 

 

 

 

DIAGNOSTIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEDS

 

b.

Electrical Noise

 

 

 

 

 

 

 

 

 

 

 

 

 

The Oxymitter 4000 has been designed to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEATER T/C

 

 

 

operate in the type of environment normally

 

 

 

 

 

 

 

 

 

 

 

DIAGNOSTIC

 

 

HEATER

 

 

 

found in a boiler room or control room.

 

 

ALARMS

 

 

 

02 CELL

 

 

 

Noise suppression circuits are employed on

 

 

 

 

 

 

CALIBRATION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

all field terminations and main inputs. When

 

CALIBRATION RECOMMENDED

 

 

fault finding, evaluate the electrical noise

 

 

 

 

 

 

02 CELL mV +

 

 

being generated in the immediate circuitry

 

 

TEST

 

02 CELL mv -

 

 

of a faulty system. Also, ensure all cable

 

 

POINTS

 

HEATER T/C +

 

 

 

 

 

 

 

 

HEATER T/C -

 

 

shields are connected to earth.

 

 

 

 

 

 

 

 

 

 

 

 

c.

Loose Integrated Circuits

 

 

INC

 

INC

 

 

 

CAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HIGH

 

LOW

 

 

 

 

 

 

 

 

The Oxymitter 4000 uses a microprocessor

 

 

GAS

 

GAS

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST GAS +

 

 

 

 

DEC

 

DEC

 

 

 

 

and supporting integrated circuits (IC). If

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROCESS -

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the electronics are handled roughly during

 

 

 

 

 

% 02

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

installation or located where subjected to

 

 

 

 

 

 

 

 

 

 

 

 

 

severe vibration, the ICs could work loose.

 

 

 

 

 

 

 

 

 

 

 

 

 

Before troubleshooting the system, ensure

 

 

 

 

 

37260044

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

all ICs are fully seated.

Figure 8-2. Diagnostic LEDs

 

 

 

 

 

 

 

 

 

8-2 Troubleshooting

Rosemount Analytical Inc. A Division of Emerson Process Management