11. MEASURING OPERATIONS. Ahlborn ALMEMO 2790, MA2790BTFV

10. Display and keypad

Function:

To switch the device ON: (s. 7.5)

Key

ON PROG

To switch the device OFF ON PROG press and hold down

To select measuring points: (s. 11.1.1) ▲ or ▼

To start measuring operation and wireless transmission F1

To access the programming functions

To program a function

F2 . . . .

ON PROG , ▲ / ▼ , ► . . . .

▲ To return to the measured value

To display maximum value (s. 11.2)

To display minimum value (s. 11.2)

To display battery voltage

► To delete, press and hold down

◄ To delete, press and hold down

ON PROG

11. MEASURING OPERATIONS

With the ALMEMO ® 2790 all available measuring channels are scanned continuously; this ensures continuous temperature compensation for dynamic pressure probes or chemical probes. (see Manual, 6.5.1.3)

Up to eight measuring channels can be displayed. See 9.2

11.1 Measured value

After switching ON first of all a segment test is performed; then the battery voltage ´ UbAt ´ appears and if the rechargeable batteries are almost empty (<3.4V) the LOBAT arrow also appears.

Battery voltage can also be viewed at any time by pressing key ON PROG .

The measured value and its appropriate units are displayed in the main field and the measuring point is displayed in the function field. All the special operating states the measured value may possibly attain are explained in 10.1.

11.1.1 Selecting a measuring point

By means of key ▲ all active measuring points can be selected one after the other; the current measured value of each of these is shown in the display. By means of key ▼ the display returns to the previous channel.

To increment the measuring channel press key ▲

To decrement the measuring channel press key ▼

With each change the measuring range abbreviation appears briefly in the display. See 11.1.2.

18 ALMEMO ® 2790

Measured value

Deactivating and reactivating measuring channels

Since only 4 of the maximum 8 measuring channels (option RH) can be transmitted over a wireless link, individual channels can be excluded from data transmission in order to prioritize those further back in the queue. In the display a channel thus deactivated is followed by two dashes.

The following table lists the steps needed to activate or deactivate a channel.

Step 1: Selecting a channel

Using key ▲ select the desired channel.

Step 2: Activating the settings menu

Press and hold down key ▼ .

In the menu the channel's current status is displayed.

Display ChAct The channel is activated.

Display ChOFF The channel is deactivated.

Step 3: Activating / deactivating a channel

To leave the settings menu without saving any changes briefly press any key (except key ▼ ).

Press briefly and release key ▼ .

This activates / deactivates the selected channel. After approx. 3 seconds the display returns automatically to the measured value.

ALMEMO ® 2790 19