Bulletin TI-72730J
Installation, Operation and Maintenance Manual
72-730 and 72-O730NA Oxygen Analyzer
www.labgasgenerators.com
2
1-800-343-4048
Alarm Controls -
The alarm controls are located on the front panel of the analyzer. The switch
on the far right enables the audible alarm. When enabled, the audible alarm will sound if the
oxygen concentration in the process stream exceeds the alarm set points set by the user. The
alarm set switch is located to the left of the audible alarm control switch. The two potentiom-
eters used to set alarm trigger points are located to the left of the alarm set switch. The LED’s
above and below the alarm set switch give a visual indication that the oxygen concentration is
beyond the specified range.
Oxygen Concentration Display -
The oxygen concentration LED display shows oxygen con-
centration, in percent, to the nearest 0.1%.
Calibration Controls -
The calibration controls are located to the left of the oxygen concentra-
tion display. The zero potentiometer is used to zero the instrument when a zero gas (containing
no oxygen) is introduced. The span potentiometer is used to set the 72-730 and 72-O2730NA
to the specified concentration of oxygen in the span gas.
Controls (cont’d)
Figure 4- Recommended Calibration Gas Valving
Figure 2 - Mounting Dimensions
All installation, operation and maintenance procedures for the Balston 72-730 and
72-O2730NA
Oxygen Analyzer should be performed by suitable personnel using reason-
able care.
The Balston 72-730 and 72-O2730NA Oxygen Analyzers should be located indoors and as close
to the process stream as possible to ensure accurate readings.
Do not install the oxygen ana-
lyzer outdoors.
The location should be clean, dry, and between 59°F and 95°F (15°C - 35°C).
If the unit will be wall-mounted, use the mounting holes on the back of the oxygen analyzer.
Mounting dimensions for the units are shown in Figure 2. Any mounting hardware supplied by
the customer should be adequately sized to support the weight (5 lbs./2.2 kg) of the oxygen
analyzer in its mounted location. The unit should be mounted to the wall using National Electri-
cal Code (NEC) and local building code guidelines. Allow a minimum of 2 in. (5 cm) on all sides
of the analyzer.
The inlet port to the 72-730 and 72-O2730NA is a 1/8" single ferrule fitting and is located on the
left side of the unit, as indicated in Figure 3. The flow rate through the oxygen analyzer is con-
trolled by a fixed orifice located inside the unit. The inlet pressure to the analyzer must be held
between 2 psig and 140 psig (0.14 barg and 10 barg), to yield an accurate reading. (
Note:
Parker recommends setting the pressure of the calibration gases as close to the operating pres-
sure of the system as possible to ensure optimal accuracy in oxygen concentration readings.)
The sample line and fittings should be brass or stainless steel to prevent contamination of the
process stream sample. A schematic for the recommended process stream and calibration gas
valving is shown in Figure 4.
Installation
Sample lines
Figure 3 - Left Side View
With Cover Removed