Emerson OXYMITTER 4000 - Manual (Page 88)

Instruction Manual
IB-106-340 Rev. 3.0
December 2003
5-2 Startup and Operation with Keypad Rosemount Analytical Inc. A Division of Emerson Process Management
Oxymitter 4000
1. DIAGNOSTIC ALARM LEDS. If there
is an error in the system, one of these
LEDs will flash various blink codes
(Section 8, TROUBLESHOOTING). In
the case of multiple errors, only one
will be displayed based on a priority
system. Correct the problem and cycle
power. The operating display will return
or the next error will be displayed. The
alarms are:
HEATER T/C HEATER
O
2
CELL CALIBRATION
2. CALIBRATION RECOMMENDED
LED. Turns on when the system de-
termines a calibration is recommended.
3. TEST POINTS. Test points 1 through
6 will allow you to monitor with a mul-
timeter: the heater thermocouple, O
2
cell millivolt, and the process O
2
.
(a) TP1 and TP2 monitor the oxygen
cell millivolt output which equates
to the percentage of oxygen
present.
(b) TP3 and TP4 monitor the heater
thermocouple.
(c) TP5 and TP6 monitor the process
gas or the calibration gas pa-
rameter.
4. CAL LED. The CAL LED is on steady
or flashing during calibration. Further
information is available in Section 9,
MAINTENANCE AND SERVICE.
5. Keys.
(a) INC and DEC. The INC and DEC
keys are used to set the values of
the calibration gases. Attach a
multimeter across TP5 and TP6.
The calibration and process gases
can now be monitored. Pressing
the INC or DEC once will cause
the output to switch from the proc-
ess gas to the calibration gas.
Pressing INC or DEC a second
time will increase or decrease the
calibration gas parameter. If the
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATER T/C
HEATER
02 CELL
CALIBRATION
CALIBRATION RECOMMENDED
02 CELL mV +
02 CELL mv -
HEATER T/C +
HEATER T/C -
INC INC
DEC DEC
HIGH
GAS
LOW
GAS
CAL
TEST GAS +
PROCESS -
% 02
MEMBRANE
KEYS
MEMBRANE
KEYS
MEMBRANE
KEY
DIAGNOSTIC
LEDS
22220023
Figure 5-2. Calibration Keys
keys have been inactive for one
minute, the output reverts to the
process gas. When a calibration
has been initiated, the value at
TP5 and TP6 is the % O
2
seen by
the cell. Oxygen levels, as seen on
the multimeter, are:
8.0% O
2
= 8.0 volts DC
0.4% O
2
= 0.4 volts DC
(b) CAL. The CAL key can:
1 Initiate a calibration.
2 Sequence through calibration.
3 Abort the calibration.
NOTE
Refer Section 9, MAINTENANCE AND
SERVICE, for calibration instructions.
b. Model 751 Remote Powered Loop LCD
Display (Optional)
Refer to Remote Powered Loop LCD man-
ual for calibration and operation.