Rosemount Oxymitter 5000, Instruction Manual

Page: 109 / 214

Instruction Manual
IM-106-350C, Rev 2.2
July 2008
9-3
Hazardous Area Oxymitter 5000
Figure 9-1. Membrane Keypad
3. Enter a time to next calibration using the TIME_TO _NEXT_CAL
parameter via fieldbus. Calibrations will then occur regularly at this
interval.
4. If using an IMPS 4000, enter a time interval via the IMPS 4000 keypad
that will initiate an automatic calibration at a scheduled time interval (in
hours). To set the CalIntvX parameter of the CHANGE PRESETS
display mode, refer to the IMPS 4000 Intelligent Multiprobe Test Gas
Sequencer Instruction Manual for more information.
Once an automatic calibration is initiated, by any of the methods previously
described, the Hazardous Area Oxymitter 5000's CALIBRATION
RECOMMENDED alarm signals an IMPS 4000 or SPS 4001B to initiate a
calibration. The sequencer sends an "in cal" signal to the control room so that
any automatic control loops can be placed in manual. Then the sequencer
begins to sequence the calibration gases.
Semi-Automatic
Calibration
Semi-automatic calibrations only require operator initiation. However, the
calibration gases must be permanently piped to the Hazardous Area
Oxymitter 5000, an SPS 4001B or IMPS 4000 must be installed to sequence
the gases, and the logic I/O must be set to mode 8 or 9 via the FOUNDATION
fieldbus computer terminal to allow the sequencer and the Hazardous Area
Oxymitter 5000 to communicate.
Depending on your system setup, a semi-automatic calibration can be
initiated by the following methods:
1. Hazardous Area Oxymitter 5000 with membrane keypad. Press the CAL
key on the Hazardous Area Oxymitter 5000 keypad.
2. Hazardous Area Oxymitter 5000 with LOI. Select "Start Calib" from the
CALIBRATION menu.
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATER T/C
HEATER
O2 CELL
CALIBRATION
CALIBRATION RECOMMENDED
O2 CELL mV +
O2 CELL mv -
HEATER T/C +
HEATER T/C -
INC INC
DEC DEC
HIGH
GAS
LOW
GAS
CAL
TEST GAS +
PROCESS -
% O2
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