2
1
P a r t s
34
P U S H
O V E R
S h o w n :
5
C A L I B R A T S E N S O R H
1 . C O S p a n G a s C y lin d e r ,
2 . R e g u la t o r , 0 3 - 4 3 1 8 * | |
3 . | T u b in g , 0 3 - 6 3 5 1 * |
4 . | F lo w m e t e r , 0 6 - 6 1 6 3 * |
5 . | C a lib r a t io n C u p A s s e m |
* | P a r t o f C a lib r a t io n K i |
* * P a r t o f T o o l / C u p K it
Figure 2. Calibration Equipment Setup
Calibration
Important! For accurate Snifit operation, periodic calibration of its CO sensor is required.
To calibrate the CO sensor, you will need the equip- ment listed under Accessories. Note that the Zero Gas Cylinder is needed only if you’re unsure about the quality of the surrounding air for zeroing purposes.
Calibrate the sensor to a known concentration of CO gas as follows:
1.Assemble the calibration equipment per Figure 2.
2.Zero the instrument as previously described under Zeroing the Sensor.
If necessary, you can use the calibration cup to apply a blend of Oxygen/Nitrogen gas directly over the sensor by attaching a zero gas cylinder to the regulator and adjusting the regulator knob for a flow rate of 2 SCFH.
3.Push the Calibration Cup over the sensor housing.
4.Attach a CO Span Gas Cylinder to the regulator. Then apply span gas to the sensor by adjusting the regulator knob for a flow rate of 2 SCFH.
-4 -
