Teledyne 3000TB-XL - Trace oxygen analyzer - Manual (Page 78)

A-6
Appendix Model 3000TB
­XL
Teledyne Analytical Instruments
BY-PASS:
To improve the system response, a by-pass can be added to increase the sample flow
rate to the analyzer by a factor of ten. A by-pass provides a sample flow path around the
analyzer of 2 - 18 SCFH. typically.
CALIBRATION GAS:
3000 series analyzer requirements for units with Auto-Cal options. The customer must
supply a control valves (or restrictors) for any SPAN or ZERO gas source which is attached
to the Auto-Cal ports. The valve should be adjusted to the same flow rate as the sample gas .
When restrictors are used, the gas pressure must be adjusted to achieve the proper flow rate.
OPERATION WITHOUT A RESTRICTOR DEVICE:
Operation without a restrictor device is not recommend as mentioned above. A
3000TB without any flow restrictor device was tested on 11-19-97. This results in a flow rate
of 2.4 SLPM @ 1 PSIG. This is a cv of 0.023 for the standard sample sys.
REFERENCE: FLOW_1.XLS & FLOW_2.XLS for information on flow rates at
various pressures.
TAI PART NUMBERS
RESTRICTOR KIT: A68729
UNION (SS) U11
LP. RESTRICTOR R2323 ( LOW PRESSURE / VAC. SERVICE )
STD.. RESTRICTOR R2324 BLUE DOT
NUT N73
FERRULE F73
FERRULE F74 BOTH FERRULES ARE REQUIRED
CONVERSIONS:
1 PSI
= .04 INCHES OF MERCURY (in. Hg.)
1 SCFH
= 0.476 SLPM