Table of Contents
Advertisement
Analyzer Start-Up
1. Verify that sample line has been purged of contaminants (refer to installation step 2,
(Chapter 3)). Verify that the sample valve at the source is closed.
2. Verify that line power and all other electrical connections are correct; a wiring error
could result in damage to the analyzer. Turn on power source to power up analyzer.
Boot up information will be displayed momentarily, then the normal operation
screen (see Figure 6, (Chapter 4)) will be displayed.
3.
open the sample valve and allow the analyzer to warm up for at least
4. Flow rate adjustment: Gas flow rates through the flow restriction devices in the tem-
perature controlled cell enclosure are set by adjusting the sample and reference input
pressure. Refer to Figure 1 for locations of pressure regulator set screws on the front
panel. Adjust the appropriate pressure regulator for a flow rate of 200 sccm during
both the sample and reference measurement periods. Flow rate can be monitored as
follows:
a. If analyzer is equipped with optional internal mass flowmeter, refer to Section 4: Dis-
play Flags to change the display on line 1, 2, or 3 to read flow rate (Line_X_Flag = 6).
Flow rate in sccm will be displayed in real time on the display.
b. If an external flowmeter is used, flow rate can be read directly from the flowmeter.
5. Line 4 of the display will flash the system message "Sample Flowing" and switch to
"Reference Flowing" after the factory default sample measurement period times out
(typically 30 seconds).
6. Dry Down and Leak Check: Leave the analyzer running undisturbed for the period
specified below to dry down and reach steady state operating temperature. During
this period, check all sample lines and fittings for leaks.
3-12 2850 Moisture Analyzer
• Dry down period for extremely low ppm applications (< 1ppm): 5 to 7
days
• Dry down period for higher ppm applications (>1 ppm): 3 days
30
.
minutes
Advertisement
Table of Contents
