Quest Products O2/LEL Uživatelský manuál stáhnout pdf (Strana 11)

Operation

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SafeCheck 200 Operator’s Manual

During the calibration procedure it also shows you the level of gas that the

sensor is detecting. At anytime during the calibration procedure, calibra-

tion can be terminated by depressing any key. At the conclusion of a suc-

cessful calibration for a gas, depress the I/O key or the ▲ arrow key to

return to the sensor list screen.

Repeat the procedure, as necessary, for any other gases being measured.

To return to the main CAL. menu, press the ▲ arrow key.

Operation

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SafeCheck 200 Operator’s Manual

• All Cal:

This operates the same as INDIVIDUAL CAL except that it steps auto-

matically through all of the installed sensors to

calibrate all of them. The unit first waits to do a

CALIBRATION ZERO. This is automatically

done before any calibration to adjust for drift in each sensors' sensitivity

which occurs over time and after use.

NOTE: Fresh uncontaminated air is necessary for the proper outcome of

this procedure. (Zero the unit away from heavy traffic, excessive cigarette

smoke, and industrial fumes.) If such an atmosphere is difficult to reach,

zero air cylinders are available.

Press the I/O key when you are sure that you are in a clean air environ-

ment. The unit goes through and automatically zeros all the installed sen-

sors.

It now instructs you to apply the gas to the unit.

Apply the calibration gas for sensor #1 in the

unit and press the I/O key. It is very important at

this point if an O

sensor is installed and the

calibration level used is some thing other than 20.9% that you apply the

calibration gas before pressing the I/O key. Not adhering to this procedure

in this case will result in an incorrect calibration for O

At this point the unit takes over and runs the calibration. It asks that you

apply gas for the first sensor it finds. On the display, the unit asks you to

apply the concentration of calibration gas that was specified in SPAN

ADJUST, showing the expected value and displaying the message

"Waiting". From here on, it operates just like INDIVIDUAL CAL and

steps through each gas in turn asking you to apply each gases' cal. level

until it is done or you abort the process.

Calibration Zero

Ready? ■

Apply Gas …

Enter to Cal.

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Quest Products O2/LEL Uživatelský manuál Strana 11

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