Teledyne GFC-7000E - Trace CO2 Analyzer - Manual (Page 52)

Model GFC7000E Instruction Manual Optional Hardware and Software
04584 Rev A1 41
INSTRUMENT CHASSIS
PUMP
SAMPLE CHAMBER
VENT SPAN
OUTLET
PRESSURE
SPAN INLET
IZS INLET
EXHAUST GAS
OUTLET
PURGE GAS
INLET
SAMPLE GAS
INLET
FLOW
SENSOR
SAMPLE
PRESSURE
SENSOR
FLOW / PRESSURE
SENSOR PCA
S
a
m
p
le
G
a
s
C
rit
ic
a
l
F
low
Or
if
ic
e
GFC Wheel
Motor
GFC Motor
Heat Sync
GFC Wheel
Housing
Purge Gas
Pressure
Control Assy
PARTICULATE
FILTER
SAMPLE /CAL
VALVE
3
2
1
Purge Gas
Flow Control
Orifice
ZERO/SPAN
VALVE
2
1
3
Ex
te
rn
a
l C
O
2
Sc
ru
b
b
er
( Op
ti
o
n
5
3
On
ly
)
Figure 5-3: Internal Pneumatic Flow – Zero/Span OPT 52 & 53
5.4.4. Zero/Span Valve with External CO
2
Scrubber (Option 53)
Option 53 is operationally and pneumatically identical to Option 52 above (see Section 5.4.3),
except that the zero air is generated by an externally mounted zero air scrubber filled with
indicating soda-lime that changes color from white to pink as it becomes saturated.
5.5. Communication Options
5.5.1. RS232 Modem Cable (Option 60)
This option consists of a cable to connect the analyzer’s COM1 port to a computer, a code
activated switch or any other communications device that is equipped with a DB-9 male
connector. The cable is terminated with two DB-9 female connectors, one of which fits the
analyzer’s COM1 port.
Some older computers or code activated switches with a DB-25 serial connector will need a
different cable or an appropriate adapter.