ACD MiniBump 사용 설명서 - 페이지 14

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VIII. MAINTENANCE

The MiniBump instrument is designed to operate at 0.5 liters per minute

flow rate. For most accurate calibration when using a MiniCal source, the

flow should be checked and adjusted if necessary. Check the flow using

a volumetric flow meter connected directly to the output of the

instrument.

If the flow needs to be changed simply adjust the flow control

potentiometer until the correct reading is obtained. To access the

potentiometer simply remove the top cover of the instrument by pulling

up on the sides and the two halves will come apart exposing the internal

workings of the product. Replace the top cover and you are ready to

calibrate.

Changes in altitude and temperature can cause changes in air density,

thus affecting the output of the MiniCal source. The output was calibrated

to STP (standard temperature and pressure) of sea level and 20 °C. To

compensate for differences in altitude or temperature from STP, the

following tables should be utilized:

Note: Altitude and Temperature are cumulative, i.e., you must correct for

both factors to obtain the most accurate calibration.

Altitude Correction Table

Altitude

corrected output

(in feet)

(multiply by)

1000

2000

3000

4000

5000

6000

(5 PPM @ 3000 feet and 0 C = 5 x 1.116 x .932 = 5.2 PPM actual output)

ON/OFF Switch

The ON/OFF Switch is activated through the front membrane panel. It is a

Temperature corrected output

1.000

1.038

1.076

1.116

1.158

1.202

1.248

1.068

1.102

Temperature Correction Table

( ° C )

-30

-20

-10

(multiply by)

0.829

0.863

0.898

0.932

0.966

1.000

1.034