|
<< Click to Display Table of Contents >> Navigation: CO2 & Pressure Devices > CL11 > Operation |
The instrument is switched on automatically when it is connected to the 5 VDC AC adapter. It takes 28 seconds to boot. The time is shown as countdown. Thereafter you are in normal mode. The real time clock is shown.
To switch off, disconnect the instrument from the AC adapter.
The instrument starts measuring when it is on and refreshes the measurements every second. If the environment changes, it takes 30 seconds before the CO2 sensor reacts.
NOTE: Keep the instrument away from faces as exhalation can change the CO2 value (carbon dioxide).
You can find the CO2 reading in ppm in the top part of the display.
The humidity value is shown a little lower.
Press “MODE“ to change the temperature parameter shown at the bottom left. You can choose between the temperature and the temperature of the probe.
If the external probe (which is discontinued) is not on, “---.-“ is shown on the display.
The backlight is activated by pressing any key for 10 seconds.
This instrument enables you to check the minimum, maximum, STEL & TWA values as soon as you switch it on. Press “MIN/MAX/AVG“ in normal mode to scroll between the minimum value, the maximum value, the 15-minute (STEL) and the 8-hour average value (TWA). STEL & TWA refer to the CO2 value. The MIN/MAX functions refer to all parameters. If the instrument has been on for less than 15 minutes or 8 hours, the STEL and TWA values are shown as “----“ to indicate that the time interval for measurement is too short.
The instrument has an audible alarm and an alarm light to warn you when the CO2 limit is exceeded. (You can set the respective limit values in the instrument’s settings.) It beeps (approx. 80 dB) and the red LED lights up when the CO2 content exceeds the set limit, and only stops again when the measurements drop below the set value or you switch off the alarm manually. It beeps again when the value exceeds the limit again.
Note: When the alarm is switched off, only the LED lights up; it does not beep.
To switch off the audible alarm manually, press “SET” for more than 2 seconds to enter setting mode. Press “UP“ or “DOWN“ to select P20 and press “ENTER“ to confirm your selection. Press “UP“ or “DOWN“ to select P22 (alarm on/off) and press “ENTER“ to confirm your selection. Press “UP“ or “DOWN“ to select “OFF“; the alarm is switched off.
The instrument can record the values for CO2/TEMP./RH/PROBE automatically and monitor the environment over the long term. The memory has a capacity of 10000 points for every parameter. You can set the sampling rate from 1 second to 4 hours, 59 minutes and 59 seconds. The factory default is 30 seconds.
To set the sampling rate, press and hold “SET“ for more than 2 seconds to enter setting mode. Press “UP“ or “DOWN“ to select the program P 40 (shown in the bottom right corner) and press “ENTER“ to start the program. Press “UP“ or “DOWN“ to select the hours, minutes and seconds of the sampling rate and press “ENTER“ to confirm your selection. Press “ESC“ to return to normal mode. When you have set the sampling rate, press and hold “START“ for 2 seconds in normal mode to start the logging program. The REC symbol and green LED light up to indicate that the instrument is recording. The LCD display continues to show the real time value.
Repeat the above to create another log. When the log memory is full, the message “FULL” appears on the screen. Press and hold “ESC“ for 2 seconds to close the data log. The REC symbol and green LED go out.