PROGRAMMING OF TOXIRAE
4 - 10
4.4.2 Standard Reference Gas (Span
Gas) Calibration
This procedure determines the second point of the sensor
calibration curve. A bottle of standard reference gas (span
gas) is needed to perform this procedure. 100 ppm
isobutylene is typically used as the span gas. Snap in the
calibration adapter over the sensor cap of the ToxiRAE
Unit, and connect the tube to the gas bottle as shown in
Figure 4.1
1. Continue from Step 4 of the previous section, the
display should show "Span?" Press
[Y/+]
key. The
display shows "Gas On?"
2. Turn on the valve of the gas bottle to start the flow of
span gas. Then press
[Y/+]
key.
- Display shows "Wait..." for about 30 seconds while
the instrument performs calibration. Afterward, the
display shows "100.0 OK?"
Note:
The reading should be very close to the value of
the given calibration gas. If the reading is lower or
higher than the standard gas value and is still rising
slowly, it means that the calibration gas has not yet
settled. Wait a few seconds and then press
[N/-]
key
again to calibrate the instrument. The new reading
should be closer to the standard gas value. Repeat this
process a few more times, if necessary, until the reading
is stable and within 1 or 2 ppm of the standard gas
value. This completes the standard gas calibration
procedure.
Содержание ToxiRAE PGM-30
Страница 16: ...OPERATION OF TOXIRAE 2 3 Figure 2 1 Major Parts of the ToxiRAE Pocket PID Unit...
Страница 33: ...OPERATION OF CHARGING STATION 3 2 Figure 3 1 Single Unit Charging Station...
Страница 134: ...APPENDIX E RAE SYSTEMS APPLICATION NOTES E 2 See Appendix F on how to obtain Application Notes...
