TSI Instruments EVM SERIES, Руководство пользователя

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Placement and Calibration of Sensors
Calibrating Toxic Gas Sensors
EVM Series User Manual
58
6. Turn regulator On . Wait for the current level to stabilize (allow at least 90 seconds to stabilize.)
(The screen will show +Ready .)
7. When the level has stabilized, press Zero soft key.
* Flashing asterisk indicates
cal. mode.
Level
Allow to stabilize before
setting calibration point
Press
Set soft key to save
the level set point
Figure 4-19: Calibration zero screen
8. Press the Set soft key. A screen displaying the zero cal intended and actual set point values will
appear. Press the Save soft key.
Zero Cal
+ (plus sign) indicates
Zero cal has been set.
Span cal
- (minus sign) indicates User
Span cal has not been set.
Figure 4-20: Calibration zero pause screen
9. To set the span cal, proceed to “Toxic gas – span calibration”.
 NOTE: To re-do the zero calibration, press the +Zero soft key and repeat steps 7 and 8.
Soft keys Explanation
Cal When pressed, this will allow a calibration to be performed.
Zero When pressed, this will enable you to a zero calibration.
Span When pressed, this will enable you to perform a span calibration.
Exit Enables you to exit at any time.
Table 4-2: Gas calibration soft keys explained