Hach-lange DR 3900 User Manual User Manual download pdf (Page 58)

Standard programs

1. Press the Timer icon.

2. Press OK to start the first timer.

The timer will count down on the screen.

3. To start the next timed activity for the Stored Program, press

the Timer icon and OK.

Note: Press Close to view the reading screen while the timer is

running. The time will be shown on the lower left side instead of the

date.

Note: Press Cancel to stop the timer midway through the

countdown.

Note: The timer will beep when the timed interval ends.

A general purpose timer is also available in many programs. Type

the timer icon and select General Timer. Enter the length of the

timed interval and press OK to start the timer. The timer will beep

when the timed interval ends.

5.4.4 Set the dilution factor

The Dilution Factor function is used to calculate the original

concentration of a sample that has been diluted by a known ratio.

1. Press Options>More…>Dilution Factor.

The number entered at the dilution factor prompt will be

multiplied by the result to compensate for the adjustment.

For example , if the sample has been diluted by a factor of 2,

enter 2. The default setting of the dilution factor is turned off.

2. Press OK to confirm. Press again OK.

Note: When a dilution is in effect, the dilution icon will appear on the

display.

Note: If using undiluted samples, set the dilution factor off again.

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Hach-lange DR 3900 User Manual User Manual Page 58