Ametek ASR900, Руководство по установке и обслуживанию

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4-4 | Heated Acid Gas Sample Probe (Large Diameter)
Preparing the Analyzer and Probe for Maintenance
Preparing and powering down the analyzer, HAG Probe, and its tem-
perature zone circuitry is necessary to ensure the safety of personnel and
equipment. This section describes how to power down the analyzer for all
maintenance requirements discussed in this chapter.
This section refers
to Model 931 or Model 932 Analyzers only. For Model 919 or Model 920
Analyzers, refer to the companion document entitled “Model 919/Model
920 Analyzers with Heated Acid Gas Sample Probe”
Manual Supplement
included in the “Supplemental Information” section of this manual.
Hazardous Locations
Before proceeding, test the area around the analyzer for flammable
gases and proceed only when the area is safe.
Do not remove the cover of the Explosion-Proof Digital
Communications Port on the front of the Lower Enclosure (
Model 931
or Model 932 Analyzers ) and do not power up/down the analyzer or
computer if there is an explosive gas atmosphere present.
Follow appropriate regulatory and/or company procedures to lock out
the analyzer while the HAG Probe or its Heater Assembly is being
worked on.
To prepare and safely power down the analyzer, HAG Probe, and its tem-
perature zone circuitry:
1. Connect a serial cable between the computer and the analyzer’s
Communications Port. Using the Configurator Software, change the
Flow Control setting to ‘ 2 ’ (zero). Click Apply (next to Flow Control )
to set the analyzer into zero Flow Control mode. Click the ManZero
button to initiate a Manual Zero then click OK . Do not save the chang-
es to EEPROM. Allow the Zero gas to flow for 2–3 minutes.
The Aspirator Drive Gas should remain on during the Zero or Span
procedure to ensure the sample gas pressure remains steady.
!
WARNING

NOTE
!
WARNING

Setup (tab)

Gas Calibration

<<Flow
Control>>