Figure 5-2. Calibration Keys - Emerson Oxymitter 4000 Instruction Manual

Instruction Manual
IB-106-340 Rev. 3.0
December 2003
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
O CELL
2
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
cell millivolt, and the process O
(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
5-2 Startup and Operation with Keypad
HEATER
CALIBRATION
2
.
2
Rosemount Analytical Inc.
MEMBRANE
KEYS
DIAGNOSTIC
ALARMS
CALIBRATION RECOMMENDED
POINTS
INC
HIGH
GAS
DEC
MEMBRANE
KEYS

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
the cell. Oxygen levels, as seen on
the multimeter, are:
8.0% O
0.4% O
(b) CAL. The CAL key can:
1
2
3
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.
A Division of Emerson Process Management
Oxymitter 4000
DIAGNOSTIC
LEDS
HEATER T/C
HEATER
02 CELL
CALIBRATION
02 CELL mV +
02 CELL mv -
TEST
HEATER T/C +
HEATER T/C -
INC
CAL
LOW
GAS
TEST GAS +
DEC
PROCESS -
% 02
MEMBRANE
KEY
seen by
2
= 8.0 volts DC
2
= 0.4 volts DC
2
Initiate a calibration.
Sequence through calibration.
Abort the calibration.
NOTE
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