Energizer PORTABLE GAS DETECTION INSTRUMENT Uživatelský manuál stáhnout pdf (Strana 13)

13

balloon may lead to inaccurate and

potentially dangerous gas readings.

Use of non-standard

calibration gas and/or calibration kit

components when calibrating the

Cannonball 3 may lead to dangerously

inaccurate readings and may void the

standard Sperian Instrumentation’s

warranty.

3.2.1 Reading “Too High” or “Too

Low” for zero adjust

To reduce the chances of the Cannonball

3 being inadvertently calibrated in

contaminated air, only small adjustments

are allowed in the automatic fresh air

calibration sequence. If the necessary

adjustments are too large, the display will

indicate the sensor (or sensors) affected,

and a message screen will indicate that

the reading is “Too Low” or “Too High”

for zero adjustment. In this case the

instrument must be fresh air calibrated

using the manual calibration procedures

as discussed in section 3.2.1 of this

manual.

Once the instrument has been

successfully fresh air calibrated using the

manual fresh air calibration procedure,

subsequent calibration adjustments may

be made using the MODE button and

automatic calibration logic discussed in

this section.

3.2.2 Automatic span calibration

with more than one gas cylinder

Depending on the sensor configuration of

the Cannonball 3, it will sometimes be

necessary to use more than one cylinder

of calibration gas to complete the

calibration of the Cannonball 3.

Note: When using the calibration

balloon and multiple cylinders of

calibration gas during calibration, it is

necessary to purge the calibration

balloon and refill it with new

calibration gas between span

adjustments. In this case the display

will indicate the type and

concentration of the next cylinder of

calibration gas to be applied.

If the initial span calibration covered

above fails to calibrate the LEL sensor or

any of the toxic sensors, the Cannonball

3 will show the following screen, which

indicates the calibrations that still need to

be performed.

Apply one of these gases

25.0 ppm H

2

S

10.0 ppm SO

2

Once the instrument detects the proper

gas and the reading stabilize, the

instrument will automatically calibrate the

sensor.

SO

2

Sensor Adjusted to 10.0ppm

(SO

2

Max Possible to 37)

When all sensors currently recognized

have been successfully span-calibrated,

the instrument will display “Auto

Calibration Completed” and proceed to

shut itself off.

Remove all fittings from the Cannonball 3

before turning the instrument back on.

Note: It is possible to exit the

automatic span calibration sequence

at any time prior to completion by

pressing and holding down the MODE

button to turn the instrument off. The

instrument will retain the updated

settings for those sensors whose

span adjustments have been

successfully completed. Sensors that

were not successfully adjusted at the

time the auto-calibration sequence

was terminated will trigger a “Needs

Cal” message at the time the

instrument is next turned on. The

accuracy of those remaining sensors

should be verified by exposure to

known concentration test gas before

the instrument is put back into

service.

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