Ametek 888 User Manual

1-12 | Model 888 ATEX IECEx Tail Gas Analyzer
Operation
Timing Sequence
All analyzer functions are broken down into 14 timing periods. Periods 1 –
11 are fully time-programmable.
Periods 1 – 2 Zero calibration cycle.
Periods 3 – 4 Sample cycle.
Periods 5 – 8 Normal zero and photo span calibration cycle.
Periods 9 – 11 Steam blowback cycle.
Special “Hold”
Period 12 – 14
Do not have timers and are used to stop the analyzer in a
specic state (ush, hold, or sample). These special peri-
ods are primarily used for troubleshooting purposes.
Figure 1-8 outlines the normal cycles and special periods indicating all
of the valve states and default timing. Refer to Appendix C for detailed
information.
SV1 Demister
Normally
Closed
SV2-Flush Solenoid
Normally
Open
SV3-Steam
Blowback
Solenoid
Normally Closed
FV3-Steam
Blowback Valve
Steam Blowback
Normally Closed
PV1-Aspirator
Proportional
Valve
Normally
Closed
Analog
Outputs
Next
Period
Data
Valid
Relay
Period Name
Time
(s)
Zero
Calibration
1
Special
Flush
0 Controlling
De-
energized
Open De-energized Closed Closed Hold 2 Off
2
Flush &
Zero
60 Controlling
De-
energized
Open De-energized Closed Closed Hold 3 Off
Sample
Cycle
3
Sample
Flush
60 Controlling Energized Closed De-energized Closed Open Hold 4 Off
4
Track
Sample
N/A Controlling Energized Closed De-energized Closed Open
Track-
ing
Note
2
On
Zero and Photo Span
Calibration
5
Flush &
Zero
60 Controlling
De-
energized
Open De-energized Closed Closed Hold 6 Off
6 Track Zero 0 Controlling
De-
energized
Open De-energized Closed Closed Hold 7 Off
7
Photo Span
Calibration
60 Controlling
De-
energized
Open De-energized Closed Closed Hold
8 or
9
Note
3
Off
8
Track Photo
Calibration
10 Controlling
De-
energized
Open De-energized Closed Closed Hold 3 Off
Steam Blow-
back Cycle
9
Pre-Steam
Flush
10 Controlling
De-
energized
Open De-energized Closed Closed Hold 10 Off
10
Steam Blow
Back
20 Controlling
De-
energized
Open Energized Open Closed Hold 11 Off
11
Post Steam
Flush
60 Controlling
De-
energized
Open De-energized Closed Closed Hold 5 Off
Special Periods
12
Continuous
Flush
N/A Controlling
De-
energized
Open De-energized Closed Closed Hold
Note
1
Off
13
Continuous
Hold
N/A Controlling Energized Closed De-energized Closed Closed Hold
Note
1
Off
14
Continuous
Sample
N/A Controlling Energized Closed De-energized Closed Open Hold
Note
1
Off
Figure 1-8.1: Analyzer Timing and Control Summary With Steam Blowback

Ametek 888 Specifications

General

Brand	Ametek
Model	888
Category	Measuring Instruments
Language	English