Metek 920, Operator'S Manual With Essential Health And Safety Requirements

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4-40 | Model 920 Multi-Gas Analyzer
Setting Up Analyzer Calibration Functions
This section describes the commonly used functions and controls available
in CAL mode.
Flow Control (Sample) Modes
The Flow Control ( FlowCtrl ) mode sets the state of the sample gas flow,
and can be controlled automatically by the analyzer ( Analyzer Control
mode) or manually forced by the operator to any of the manual modes.
The screen will display a character on the top-left line that indicates the
current operating mode and either
automatic or manual control.
Flow Control Mode
FlowCtrl Gas Transport (set automatically by analyzer or Character
Code Method manually by operator) on User Interface
0 Aspirator Analyzer Control blank = Sample
(automatic, by Analyzer) b = Backpurge
1 Aspirator Continuous Backpurge B (* See Note)
(manual, by operator)
2 Aspirator Continuous Sample S
(manual, by operator)
10 Aspirator Continuous Zero Gas Flow – probe tip Z
(manual, by operator)
11 Aspirator Continuous Calibration Gas #1 Flow – probe tip C
(manual, by operator)
12 Aspirator Continuous Calibration Gas #2 Flow – probe tip C
(manual, by operator)
100 Sample Block Valve Analyzer Control blank = Sample (by analyzer)
(automatic, by Analyzer) b = Backpurge (by analyzer)
101 Sample Block Valve Continuous Sample Block-Off B
(manual, by operator)
102 Sample Block Valve Continuous Sample S
(manual, by operator)
110 Sample Block Valve Continuous Zero Gas Flow – local Z
(manual, by operator)
111 Sample Block Valve Continuous Calibration Gas #1 Flow – local C
(manual, by operator)
112 Sample Block Valve Continuous Calibration Gas #2 Flow – local C
(manual, by operator)
* The ‘ B ’ character is also displayed when the Remote Backpurge
function (optional) is manually activated via a remote dry (potential
free) contact opening.

NOTE

(FlowCtrl) CAL

F5 2