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

Page: 141 / 278

Controller / User Interface | 4-33
CAL Mode – F1 Commands
Keystroke Term Definition
F1 • — —
F1 – — —
F1 0 Auto/Zero? Automatic adjustment of the analyzer Zero. The Zero gas (air) solenoid is turned on and off
automatically during the Zero. The Zero Offset is adjusted based on the average reading
during the last 25 % of the Timer0 countdown only if AdjDisable is set to ‘ 0 ’.
F1 y Auto/Span y ? Allows you to initialize the analyzer to automatically introduce Calibration gas into the
sample system, where ‘ y ’ = F1 1..F1 2 .
F1 1 = Auto/Span1?
F1 2 = Auto/Span2? – Used only with O
2
Sensor (General Purpose applications)
F1 2 = Auto/Span2? – System Isolation Blow-Back Solenoid (Optional)
Auto/Span
Only the Span function for ‘ y ’ is performed. The Calibration gas solenoid valve connected to
SSR output ‘ y ’ is turned on and off automatically during the sequence.
The analyzer calibration is automatically adjusted based on the average reading during the
last 25 percent of the countdown after a Yes response only if AdjDisable is set to ‘ 0 ’.
If a multi-component calibration gas mixture is used, the spans for all components in the
mixture are done simultaneously.
Isolation Blow-Back Solenoid (Optional)
This system is used in place of the “AutoSpan2?” function on systems requiring Sample
Line Isolation and Blow-Back Solenoid (custom configurations).
F1 3.. — —
F1 4 — —
F1 5 — —
F1 6 — —
F1 7 PrbBlowBk? Used on systems that use a sample probe with a Blow-Back function. When you press
F1 7
from this menu, “
PrbBlowBk?
” is displayed. Press
Ent
to initiate a manual probe
Blow-Back.
F1 8 — —
F1 9 Auto/Cal? Allows you to initialize the analyzer to automatically cycle sequentially through the Auto-
Zero and Auto-Span functions. Only the functions with timers set to non-zero durations are
included.
The Zero Offset and calibration will be automatically adjusted only if AdjDisable is set to ‘ 0 ’.