Maintenance; On/Off Switch - ACD MiniBump Instruction Manual

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)
0
1000
2000
3000
4000
5000
6000
40
50
(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
0
10
20
30
13
(multiply by)
0.829
0.863
0.898
0.932
0.966
1.000
1.034