SenSmart 3000 User's Manual
Document: UM-1003
Revision Level B
17
Figure 4-1: Calibration Gas Input
Use the following step-by-step procedure to perform ZERO and SPAN calibrations.
1. To enter the CAL MODE from either data display, press the DOWN / CAL key and within
5 seconds press the EDIT key.
2. Using the Cal-Cup, apply a clean ZERO gas or be sure there is no background target gas
in the monitored area. After the reading is stable, (approximately 1 minute) press the
EDIT key to perform a ZERO calibration.
3. If the ZERO calibration is successful, press the NEXT key to proceed to the SPAN check.
4. Apply the
correct
SPAN gas at .5 liters/min. After the reading is stable, (approximately 1
minute) press the EDIT key to perform a SPAN calibration.
WARNING:
The SPAN gas used must match the value specified since this is what the
SenSmart 3000 will indicate after a successful SPAN calibration. The
Cal Span Value
may be edited if it becomes necessary to apply a different gas concentration (see
Cal
Span Value
in section 5.3).
5. If
the SPAN calibration is successful, the display flashes “REMOVE CAL GAS” and starts
the CAL PURGE delay.
6. CAL MODE will be complete after the end of the CAL PURGE delay.
The flow chart in Figure 4-2 illustrates the above procedure. UP, CAL, NEXT & EDIT labels
indicate keystrokes using the magnetic wand. The CAL MODE information screen (top of the
chart) is available for advanced users to see Offset / Gain calibration constants and live analog to
digital converter (A/D) counts. Span Gas calibration values may also be edited from this screen.
Holding the UP key, for 5 seconds during CAL MODE, displays this screen.