Emerson ROSEMOUNT 3000 - Manual (Page 68)

Instruction Manual
IB-106-300NH Rev. 4.3
May 2005
4-6 Calibration Rosemount Analytical Inc. A Division of Emerson Process Management
World Class 3000
0.4%
O
2
8.0%
O
2
37840013
CALIBRATE
IN PLACE
CONNECTION CHECK
VALVE
PUSHBUTTON
REGULATOR
WITH CONTENTS
GAGE - SET 5 SCFH
REFERENCE AIR
CONNECTION
CALIBRATION
GAS HOSE
CONNECTS
TO CHECK
VALVE
NOTE: PROBE CALIBRATION GAS
FITTING HAS A SEAL CAP
WHICH MUST BE IN PLACE
EXCEPT DURING CALIBRATION.
Figure 4-3. Typical Portable Calibration Setup
d. Manual (Semiautomatic) Calibration
Procedure
The following procedure relates to an op-
erator initiated calibration selected at the
IFT by pressing the CAL key. The calibra-
tion is manually performed by the operator
upon data queues from the IFT. Any system
without an MPS 3000 Multiprobe Calibration
Gas Sequencer must follow these steps.
1. Press SETUP to display the SETUP
menu. Select PROBE CALIBRATION
sub-menu. Ensure that Auto Cal is dis-
abled. Set the cursor on Auto Cal.
Press ENTER. Set Auto Cal to NO if
not already done.
2. Press the CAL key. Select PERFORM
CALIBRATION sub-menu. "Press EN-
TER to start Manual Calibration" will
appear on the LCD display. Press
ENTER to start. Follow the data
queues. Refer to Table 5-4, CALI-
BRATE O
2
Sub-menu.
e. Fully Automatic Calibration
1. Calibration Gases For Fully Automatic
Calibration. For fully automatic calibra-
tion, an MPS 3000 Multiprobe Calibra-
tion Gas Sequencer is required as well
as the two types of calibration gas.
Do not use 100% nitrogen as a zero
gas. It is suggested that gas for the
zero be between 0.4% and 2.0% O
2
. Do
not use gases with hydrocarbon con-
centrations of more than 40 parts per
million. Failure to use proper gases
will result in erroneous readings.
NOTE
Ambient air is not recommended for
use as high calibration gas. An 8% O
2
balance in nitrogen is recommended
for high calibration gas.
Two tanks of precision calibration gas
mixtures. Recommended calibration
gases are nominally 0.4% and 8.0%
oxygen in nitrogen set calibration gas
pressure at 20 psi (138 kPa).
A typical automatic calibration system
is shown in Figure 4-4.