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Teledyne API – Model T700 Dynamic Dilution Calibrator Getting Started
69
DILUENT
PRESSURE
SENSOR
INPUT GAS
PRESSURE SENSOR
PCA
CAL GAS
PRESSURE
SENSOR
PHOTOMETER
PRESSURE SENSOR
O
3
GEN / PHOTOMETER
PRESSURE / FLOW SENSOR PCA
O
3
GAS INPUT
PRESSURE SENSOR
O
3
FLOW
SENSOR
O3 Generator Assembly
O
3
GENERATOR
Flow Control
(1.0 LPM)
Flow Control
(10 cm
3
)
On Back Panel
Instrument Chassis
GAS OUTPUT MANIFOLD
PHOTOMETER
OUTLET
CAL GAS
OUTPUT 2
VENT
CAL GAS
OUTPUT 1
DILUENT
INLET
GAS INPUT MANIFOLD
(on back panel)
Purge
Valve
CAL GAS 1
INLET
CAL GAS 3
INLET
CAL GAS 4
INLET
CAL GAS 2
INLET
Cal Gas
Mass Flow Controller 1
Diluent
Mass Flow Controller
GPT
Volume
PHOTOMETER
INLET
EXHAUST
PHOTOMETER
ZERO OUT
PHOTOMETER
ZERO IN
PHOTOMETER BENCH
PUMP
Flow Control
(800 cm
3
)
Cal Gas
Mass Flow Controller 2
INTERNAL
VENT
Pressure
Regulator
GPT
Valve
O
3
Gen
Valve
REF/MEAS
Valve
DILUENT
Valve
grn
blk
red
blu
blu
blu
blk
red
gry
gry
wht
vio
vio
wht
grn
brn
brn
brn
orn
yel
orn
yel
yel
yel
yel
yel
Figure 3-25:
T700 with Multiple Calibration Gas MFCs and O
3
Options 1A and 2A Installed
PERMEATION TUBE GAS GENERATOR PNEUMATICS AND SETUP
The permeation tube gas generator (see Figure 3-26) is an alternative method for
producing known concentrations of stable gas such as SO2, NO2, etc. The generator
consists of a temperature regulated permeation tube oven, a flow restrictor, an optional
output desorber, and a user-supplied permeation tube. The optional desorber can
improve the response time of the calibrator especially when operating with NO2 tubes
(when operating with sulfur based gases it MUST be removed).
The permeation tube consists of a small container of a liquefied gas, with a small
window of PTFE through which the gas slowly permeates at a rate in the nanogram/min
range. If the tube is kept at constant temperature, usually about 50C, the device will
provide a stable source of gas for a year or more. A pneumatic diagram of the T700 with
this option is shown in Figure 3-27, including the generator.
06873B DCN6388