Period Hours; Total Duration Hour; Zero/Span/Purge Duration Minutes - Thermo Scientific 48i Instruction Manual

Period Hours

Total Duration Hour

Zero/Span/Purge
Duration Minutes
Thermo Fisher Scientific
The Zero/Span Period Hours screen defines the period or interval between
zero/span checks. Periods between 0 and 999 hours are acceptable. To turn
the zero/span check off, set the period to 0.
In the Main Menu, choose Calibration > Zero/Span Check > Period
●
Hr.
ZERO/SPAN PERIOD:
CURRENTLY:
SET TO:

CHANGE VALUE
RANGE AVG
The Total Duration Hour line is the sum of the zero, span, and purge
duration minutes, and is for viewing only.
The Zero Duration Minutes screen defines how long zero air is sampled by
the instrument. The Span and Purge Duration Minutes screens look and
function the same way as the zero duration screen. The span duration
screen is used to set how long the span gas is sampled by the instrument.
The purge duration screen is used to set how long the purge period will be
after doing a zero or span check. This gives the instrument time to flush
out the zero and span gas before any meaningful data is taken. Logged data
is flagged as taken during a purge to show that the data is suspect.
Durations between 0 and 99 minutes are acceptable. Each time a zero/span
check occurs the zero check is done first, followed by the span check. To
perform just a zero check, set the span duration to 0 (off). The same applies
to perform just a span check.
In the Main Menu, choose Calibration > Zero/Span Check > Zero,
●
Span or Purge Duration Min.
ZERO DURATION:
CURRENTLY:
SET TO:

CHANGE VALUE
RANGE AVG
024 HRS
025 HRS ?
 MOVE CURSOR
SAVE
DIAGS ALARM
30 MIN
31 MIN ?
 MOVE CURSOR
SAVE
DIAGS ALARM
Operation
Calibration Menu
Model 48i Instruction Manual 3-23