Dickson TH550 Manual de operação - Página 3

Procurar online ou descarregar pdf Manual de operação para Instrumentos de medição Dickson TH550. Dickson TH550 5 páginas. Digital temperature, humidity, dew point monitor

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Operating Instructions, Ctd.

7. Automatic Shutoff This instrument will

automatically shut down after "" 34 minutes if

no keys are

pressed.

8. Automatic Shutoff Override

You may override the automatic shutoff

fea-

ture at startup by pressing down the "Hold"

key. and the "On" key at the same

time.

The

letter 'T' will light up in the

display,

indicating

that the shutoff timer is in the override

mode.

9. Minimum/Maximum

Press "Min/Max" once and the minimum val-

ues will

displayed for approximately 7 sec

onds.

Press "Min/Max" again during this time and

the r:naximum values will be displayed for 7

seconds.

Press "Min/Max" a third time during this peri-

od and the unit will return to normal opera

tion.

Unit will always return to normal operation

after 7 seconds if no keys are pressed.

Note: Turning the unit off resets the minimum

and maximum values

Minimum Display

Maximum Display

Battery Installation

Battery should be replaced as soon as possible

after low battery indication to maintain rated

accuracy of unit

Calibration

Your instrument was carefully tested

and calibrated before being

shipped from the

factory.

Additional calibration is not

required. However. should calibra-

tion be desired in the future. follow

these

procedures:

1 . Identify a standard that is more

accurate than this unit Factory

supplied calibration salts or

elec-

tronic instruments recently

cali-

brated at a certified lab are rec-

ommended. Sling psychron-

meters and instruments using

mechanical sensing elements

(human hair. wood

elements.

etc.) are NOT

recommended. These instru-

ments can be subject to great

inaccuracies due to the nature

mechanical

measurement.

2. Place the probe of the unit into

the calibration salt capsule or

into a controlled environmental

chamber and allow for complete

stabilization. For best

results.

calibrate the unit at levels typical-

ly monitored during normal

operation. Calibration in an

open room without the salt cap-

sule or a chamber is not recom-

mended as temperature and

humidity can vary greatly within

a very small

area.

3. To activate the calibration mode.

turn the unit

off.

Now press the

"On/Off' key and the "C/F" key at

the same time. A small

"J"

will

appear in the display to indicate

you are in the calibration mode.

Step 3: Activating Calibration

Mode