Bulletin TI-72730J
Installation, Operation and Maintenance Manual
72-730 and 72-O730NA Oxygen Analyzer
www.labgasgenerators.com
5
1-800-343-4048
All maintenance activities should be performed by suitable personnel using reasonable
care. Safety risks that may affect the service personnel are identified with protective
measures that apply. The service personnel will verify the safe state of the analyzer
after maintenance is completed.
The only routine maintenance required by the Balston 72-730 and 72-O2730NA Oxygen
Analyzers is timely calibration and annual sensor replacement. Calibration details and rec-
ommended calibration scheduling are outlined in the “Calibration” section of this manual. If
necessary, the Balston 72-730 and 72-O2730NA Oxygen Analyzer may be wiped clean with a
dry cloth on an as needed basis.
Do not use water, aerosols, or other cleaning agents to
clean the unit.
Note:
There are no customer serviceable parts inside the metal cover of the analyzer.
Disconnect analyzer from power supply before replacing galvanic cell sensor.
The galvanic cell sensor degrades over time and should be replaced on an annual basis
(P/N 72695). The only tools needed for this replacement are a small screwdriver and wire
strippers. The procedure for changing the sensor is outlined below and takes approximately
10 minutes.
1
Remove sensor cover and disconnect old cell wires from connectors by pressing the
screwdriver into the hole next to the connector and pulling wires out.
2
Strip replacement sensor connecting wires to 1/4" to 3/8" (6mm to 9mm) using wire
strippers. Install the sensor into the sensor holder on the left side panel of the analyzer
(see Figure 3) by pushing firmly into place.
3
Insert small screwdriver into the hole adjacent to the wire connection point (see Figure 3)
and press to open connector.
4
Slide the stripped wire end into the appropriate (red or black) connection port until it
“bottoms out”. The red wire goes to the “+” connector, and the black wire goes to the
“-” connector.
5
Remove the screwdriver to clamp the wire into the connection port. Pull the wire gently
Maintenance
Galvanic Cell
Replacement
The customer is responsible for the circuitry utilizing these relay outputs and should use good
engineering safety practices in the design of this circuitry.
1
Strip all connecting wires to 1/4" to 3/8" (6mm to 9mm) using wire strippers.
2
Insert small screwdriver into the hole adjacent to the wire connection point and press to
open connector.
3
Slide the stripped wire end into the connection port until it “bottoms out”.
4
Remove the screwdriver to clamp the wire into the connection port. Pull the wire gently to
test integrity of the connection. Repeat this procedure from step 2 if the wires release easily.
Figure 6 - Sample Schematic for Wiring Alarm Relay Contacts, Right Side View
