Delta Faucet DF-745 Manuel D’Utilisation
Installation, Start Up and Shut Down DF-745
19
4.2 Analyzer Start Up
It is important to note that, if equipped with automatic gas valves, the moisture cell is
isolated from gas flow while the analyzer is off power.
isolated from gas flow while the analyzer is off power.
Open the door and turn on the power using the main power switch inside the analyzer. See
Figure 2. The pump, if equipped, should turn on (see page 17) and the analyzer will
undergo a series of Diagnostic Procedures while the various startup screens are displayed.
Next, the Delta F Corporation logo is briefly displayed and then the data display appears
with the “Warming Up” screen flashing. The warm up process takes approximately six to
ninety minutes after which the display will look similar to Figure 8 (values shown are only
representative).
Figure 2. The pump, if equipped, should turn on (see page 17) and the analyzer will
undergo a series of Diagnostic Procedures while the various startup screens are displayed.
Next, the Delta F Corporation logo is briefly displayed and then the data display appears
with the “Warming Up” screen flashing. The warm up process takes approximately six to
ninety minutes after which the display will look similar to Figure 8 (values shown are only
representative).
During the Warm Up process the gas valves (if equipped) can be opened and gas flow
started. See the section on Gas Pressure and Flow Settings on page 20 for important
information on the gas delivery system and setting proper pressures and flow rates.
started. See the section on Gas Pressure and Flow Settings on page 20 for important
information on the gas delivery system and setting proper pressures and flow rates.
NOTE
During the warm up period all analog and digital outputs are held to an
artificial 0.011ppb reading to avoid the reporting of false readings.
artificial 0.011ppb reading to avoid the reporting of false readings.
Figure 8: Data Display Screen
4.2.1 Gas Delivery System
The gas delivery system as shown in Figure 9 is designed to deliver a gas flow rate of 2
liters per minute to the moisture cell while maintaining the highest standards of gas purity
and delivery for ultra-trace analysis. Features include a single inlet line and flow meter for
the gas sample, and optional bypass loop to maintain constant purging, and essentially dead-
leg free delivery.
liters per minute to the moisture cell while maintaining the highest standards of gas purity
and delivery for ultra-trace analysis. Features include a single inlet line and flow meter for
the gas sample, and optional bypass loop to maintain constant purging, and essentially dead-
leg free delivery.
The connections at the rear of the gas delivery system include a ¼” VCR swivel connection
for the process inlet, a ¼” compression outlet for the moisture cell, an optional pneumatic
gas connection (1/8” compression), and an optional ¼” compression outlet for the bypass
loop. Also on the rear of the gas delivery system, if equipped, are a sample gas regulator to
adjust the internal sample pressure and a bypass flow meter.
for the process inlet, a ¼” compression outlet for the moisture cell, an optional pneumatic
gas connection (1/8” compression), and an optional ¼” compression outlet for the bypass
loop. Also on the rear of the gas delivery system, if equipped, are a sample gas regulator to
adjust the internal sample pressure and a bypass flow meter.