HOLD function
When in measuring mode, the "HOLD" button allows the measured values for carbon dioxide and tem-
perature to be held in the display. The "HOLD" symbol is shown in the display. Pressing the button again
switches back to the normal measuring mode "HOLD" is no longer shown.
Switching the device on and off
Switch the device on using the "POWER" button (3). The measuring
device stays in the warmup phase for approx. 45 seconds. This is sig-
nalled by "WARM UP" in the display. Wait until the carbon dioxide and
temperature values appear and the "WARMUP" symbol disappears.
The measuring device is ready for operation. Switch the device off by
pressing the "POWER" button (3) again. "OFF" is shown in the display and the device switches off with a
beep tone.
Setup Menu
Carry out the setup menu setting at first operation of the product. The "HOLD" and
"REC" function must be deactivated to enter the setup menu. To deactivate the REC
function press and hold the "REC" (7) button for approx. 2 seconds. Both symbols
(HOLD and REC) should not be shown in the display.
The setup menu allows you to make basic settings which are necessary for correct operation and also to
adjust additional parameters.
The menu is reached as follows:
1. Switch on the device and wait until the "WARMUP" phase is complete.
2. Press and hold the "SET" (1) button for approx. 4 seconds. The display shows "SET"
3. Use the SET (1) and ALARM (8) buttons to select individual menu items.
4. Confirm your selection by pressing the "ENTER" (7) button. You can change the parameters.
5. Use the SET (1) and ALARM (8) buttons to change the parameters.
6. Confirm your selection by pressing the "ENTER" (7) button. The parameter is saved and the menu is
then exited. If you don'*t want to save the setting, press the "ESC" button (4). The menu is ended.
7. Repeat points 2 to 6 in order to set other menu item.
The following menu items can be selected:
PoFF
To set automatic shutoff
t-CF
To set the temperature unit (°C/°F)
AL
To set the upper threshold of the CO
ALt
To set the correct altitude of the measuring location (in relation to sea level - above mean sea
level (AMSL)).
ESC
The setup menu can then be exited.
22
concentration alarm
2