Instruction manual

9.0 CALIBRATION SM425 INSTRUCTION MANUAL
details, consult Section 1.46,”Output Hold setting”. Hold time can be set from 00 minutes, 00 seconds to
60 minutes, 59 seconds.
Csl Time (calibration time) is the time between the start of calibration-gas flow and calibration
measurement reading. Csl time is applied to both zero and span gases. See Figure 9-7. Csl time can be
set from 00 minutes, 00 seconds to 60 minutes, 59 seconds.
Interval applies to automatic calibration mode only. It is the timer between automatic calibration cycles
and can be set from 000 days, 00 hours to 255 days, 23 hours.
Start date/Start time applies to automatic calibration mode only and is the starting time for the first
calibration in the series. For example, to start the first calibration at 1:30 p.m. on March 25, 2001, enter
25/03/01 as the start date and 13 hours, 30 minutes as the start time
Table 9-1 summarizes the use of the timing parameters in the different calibration modes.
Table 9-1 Calibration Modes and Timing Parameters
Manual
Semi-
automatic
Automatic
Hold Time
x x x
Csl Time
x x
Interval
x
Start Date
x
Start Time
x
Figure 9-7 Calibration and Output-stabilization Time Settings
Use the following guidelines to setting automatic calibration timing:
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