Bacharach 50 manual Calibration, O w n

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P a r t s

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P U S H

O V E R

S h o w n :

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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.

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