Teledyne 3010MA – Paramagnetic oxygen analyzer, no 0-100% range – (superceded) - Manual (Page 78)

Part 2 Analysis Unit Model 3010MA
Teledyne Analytical Instruments 78
If remote gas selection is desired, the user must supply 3 two-way 24
V dc solenoid actuated valves, one for span, zero and sample gas. These
valves are tied into the 50-Pin Equipment Interface connector as described
in Section 3.3.2.3.
NOTE: The automatic calibration feature of this analyzer can still be used
even without remote valve operation however, the appropriate gas
(zero, span or sample) must be selected manually. Calibrating this
instrument using the wrong gas i.e. zero gas instead of span gas,
will result in inaccurate analysis.
6.5 Leak Checking the Analysis Unit
The internal piping in the Analysis Unit has been assembled and leak
checked at the factory however it is wise to recheck all lines and fittings to
ensure that the system remains leak free.
CAUTION: THE SENSOR MUST NOT BE EXPOSED TO PRESSURE
IN EXCESS OF 14 PSIG WHEN LEAK TESTING.
The most expedient way to leak check the system is to
use a commercial soap solution and pressurize the system
using clean air, nitrogen or other non-toxic, non-flammable gas to 10 psig
or less. Apply the soap solution and watch for vigorous bubbling. A
certain amount of low intensity bubble activity is normal such as bubbles
collapsing under atmospheric pressure. If a leak occurs, it will show as a
continuous activity and be much more pronounced than the surrounding
bubble activity.
Check each fitting entering and exiting the analyzer including the
pressure compensation line at the Control Unit. If a leak occurs at a fitting,
tighten the fitting an additional 1/8 to 1/4 turn. If the leak persists after
tightening, replace the fitting.
When the system is leak-free, continue flushing with the gas used for
leak checking for 15 minutes. Then disconnect the leak check gas and
reconnect the sample gas.
6.6 Initial Sensor Calibration
Prior to using the analyzer for the first time, an initial sensor
calibration may be required. The sensor must also be purged for 24 hours
as described in Part 1 Section 3.6. The specific steps to perform this
calibration will be outlined here however, the procedure will be easier to
follow after reading Chapter 4, Operation.