Instruction Manual
IM-106-350C, Rev 2.2
July 2008
9-5
Hazardous Area Oxymitter 5000
3. If performing a manual calibration with the CALIBRATION
RECOMMENDED LED off and the CAL LED off, start at step a.
4. If performing a manual calibration with the CALIBRATION
RECOMMENDED LED on and the CAL LED on, start at step b.
a. Push the CAL key. The CALIBRATION RECOMMENDED LED will
come on and the CAL LED will be on solid. If a multimeter is
attached across TP5 and TP6, the reading will display the
percentage of oxygen seen by the cell.
b. Push the CAL key. The CALIBRATION RECOMMENDED LED will
turn off and the CAL LED will flash continuously. The flashing LED
indicates that the Hazardous Area Oxymitter 5000 is ready to accept
the first calibration gas.
c. Apply the first calibration gas. (Electronics will abort the calibration if
step 4 is not done within 30 minutes).
d. Push the CAL key; the CAL LED will be on solid. A timer is activated
to allow the calibration gas adequate time to flow (default time of five
minutes). When the timer times out, the Hazardous Area Oxymitter
5000 has taken the readings using the first calibration gas and the
CAL LED will flash continuously. The flashing indicates the
Hazardous Area Oxymitter 5000 is ready to take readings using the
second calibration gas.
e. Remove the first calibration gas and apply the second calibration
gas. (Electronics will abort the calibration if step 6 is not done within
30 minutes).
f. Push the CAL key; the CAL LED will be on solid. The timer is
activated for the second calibration gas flow. When the timer times
out, the CAL LED will flash a 2 pattern flash or a 3 pattern flash (2
pattern flash equals a valid calibration, 3 pattern flash equals an
invalid calibration). If the slope or the constant is out of specification,
a diagnostic alarm LED will be flashing. The diagnostic alarm will
remain active until the purge cycle is over. If the three pattern flash
occurs without a diagnostic alarm, the calibration gases could be the
same or the calibration gas was not turned on.
A flashing CAL LED indicates the calibration is done. (See Section 8:
Troubleshooting, for an explanation of the 2 pattern and 3 pattern
flashes).
g. Remove the second calibration gas and cap off the calibration gas
port.
h. Push the CAL key; the CAL LED will be on solid as the unit purges.
(Default purge time is three minutes). When the purge is complete,
the CAL LED will turn off and the Hazardous Area Oxymitter 5000
output unlocks from its held value and begins to read the process
O
2
.
If the calibration was valid, the DIAGNOSTIC ALARMS LEDs will
indicate normal operation. If either new calibration value (slope or
constant) is not within parameters, the DIAGNOSTIC ALARMS LED
will indicate an alarm. (See Section 8: Troubleshooting, for alarm
codes). If the calibration was invalid, the Hazardous Area Oxymitter
5000 will return to normal operation, as it was before a calibration
was initiated, and the parameters will not be updated.
5. Place control loop in automatic.
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