Emerson Rosemount OCX 8800, Instruction Manual

Page: 71 / 306

Section 3: Configuration and
Startup
April 2017
Instruction Manual
IM-106-880C, OI
46
Initial Power
Up
Verify that the following switch settings are correct for your Hazardous Area OCX 8800
installation:
SW3 The factory sets this switch as follows:
• Position 1 not used.
• Position 2 not used.
Positions 3 and 4 must be set as shown for proper software control of the device heaters.
3.3 Initial Power Up
Allow adequate time (approximately 60 minutes) for the heaters to begin operation and for the
Hazardous Area OCX 8800 to reach normal operating temperature on power up. Normal
operating temperature for the O
2
cell is 736

C. Normal operating temperature for the
combustibles cell is 300

C. The normal sample line temperature is 170

C. During this time the
eductor air solenoid will remain closed so no sample is pulled through the analyzer. When the
OCX reaches operating temperature the solenoid will energize, eductor air will begin to flow,
and the unit will begin normal operation.
3.4 Set Test Gas Values
Use Field Communicator or the optional LOI to set test gas values for calibration. Refer to
Section 3.4.2 or Section 3.4.3 for more information.
3.4.1 Setting Test Gas Values with the Field Communicator
1. Use the 375 Field Communicator software to access the HART menu.
2. From the DETAILED SETUP menu, select CAL SETUP.
3. From the CAL SETUP menu, select O2 CAL PARAMS or COe CAL PARAMS.
4. From O2 CAL PARAMS, select O2 HIGH GAS. Enter the percent O
2
used for the high O
2
test gas.
5. From O2 CAL PARAMS, select O2 LOW GAS. Enter the percent O
2
used for the low O
2
test
gas.
6. From COe CAL PARAMS, select COe Test Gas. Enter the CO concentration (ppm) used for
COe test gas.
3.4.2 Setting Test Gas Values with Fieldbus Communicator
1. Use the 375 Field Communicator software to access the Fieldbus menu.
2. From the TRANSDUCER menu, select O2 CAL.
3. From O2 CAL menu select O2 CAL SETUP.
4. From O2 CAL SETUP, select O2 HIGH GAS. Enter the percent O
2
used for the high test gas.