Backlight - Wohler CD 210 Bedienungsanleitung

Wöhler CD 210
Fig. 5.2: Visualization of the dew point
5.4. Data Hold
Press HOLD to freeze the readings. The „HOLD" icon appears on the left top of the
display. All current readings are kept unchanged, except STEL and TWA. Press
HOLD again to cancel the hold function.

5.5. Backlight

Hold down MODE for more than one second to activate and cancel backlight func-
tion.
5.6. Min, Max, STEL, TWA
Under normal mode, press M/AV to see the minimum, maximum and weighted
average readings. At each press of M/AV the display shows MIN, MAX, STEL, TWA
in sequence and returns to normal mode.
In MIN and MAX modes, it shows the minimum and maximum readings of the CO
level on the main display and of the air temperature, dew point or wet bulb tempera-
ture and the relative humidity on the lower displays.
In the STEL and TWA modes, the main display shows the weighted average of CO
readings for the past 15 minutes (STEL) and 8 hours (TWA). The lower displays are
the current air temperature, dew point, wet bulb temperatures and humidity.
Note:
1. If the meter is turned on for shorter than 15 minutes, the STEL value will be the
weighted average of readings taken since the meter has been powered on.
2. It takes at least five minutes to calculate STEL and TWA. The display shows "--
--" during the first five minutes from power on.
3. While all readings are held unchanged, STEL and TWA will keep updating
every five minutes.
Fig. 5.3: Display during the first five minutes
5.7. Alarm
The meter features audible alarm to give warnings when the CO
exceeds the limit (see chapter 7.1). It emits beeps when the CO
the set value and stops when any key (but the ON/OFF key) is pressed or readings
fall below the set value. It beeps again when the value goes over the limit. Restart
22 Hotline: +49 2953 73-211 Fax: +49 2953 73-250
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2
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concentration
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-level goes over
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