Dostmann P790 meter can be equipped with 2 reference sensors.
P790 precision instrument for PT100, thermocouples and relative humidity - Dostmann
The complete handling of the Dostmann P790 instrument is described in its Operating Instruction.
During the calibration with P790 the following manual operations are needed:
start logging before the calibration,
enable P790 Bluetooth interface before assigning the meter and reading the measurements,
disable P790 Bluetooth interface after assigning the meter,
disable Auto OFF.
All the operations are described below in detail.
Start logging
To start logging the measurements in P790 internal memory:
Press (ENTER/MENUE) and use the up and down keys () to select Lo6. Push (ENTER/MENUE) to confirm.
Use the up or down keys () to select on. Push (ENTER/MENUE) to confirm.
Use the up or down keys () to select automatic storage (Auto). Push (ENTER/MENUE) to confirm.
Use the up or down keys () to select to create a new file (nLo6). Push (ENTER/MENUE) to confirm.
Use the up or down keys () to select the time interval of 1 minute (1 Π). Push (ENTER/MENUE) to confirm. Push (ESC) to revert to the measuring mode i.e., the state where the readings are shown on the LCD.
The logging stops when the log is read for the first time, but it remains intact and can be read multiple times if needed. The data are deleted only if a new log is started.
Enable Bluetooth interface
To enable Bluetooth interface press (ENTER/MENUE). Use the up or down keys () to select bLE.
Press (ENTER/MENUE) to choose. Use the up or down keys () to select on and press (ENTER/ MENUE) to confirm.
Push (ESC) to revert back to the measuring mode i.e. the state where the readings are shown on the LCD.
Please note that there will be no correct communication with the instrument if it will not be in the measuring mode despite the fact it will be discoverable over Bluetooth.
The BLE on state is indicated by an arrow pointing up, shown in the upper right corner of the meter LCD.
When operating on battery, Bluetooth interface shall be enabled just before reading the reference sensor data because it consumes a lot of power. The meter switches Bluetooth off automatically, after the data are read, to preserve the battery so it has to be enabled if the data has to be read again.
Disable Bluetooth interface
To disable Bluetooth interface press (ENTER/MENUE). Use the up or down keys () to select bLE.
Press (ENTER/MENUE) to choose. Use the up or down keys () to select off and press (ENTER/ MENUE) to confirm.
Push (ESC) to revert back to the measuring mode i.e. the state where the readings are shown on the LCD.
If BLE is off, then there is no arrow in the upper right corner of the meter LCD.
Disable AUTO-OFF
When operating on battery disable AUTO_OFF function which turns the meter off after 30 minutes. Press and hold (ESC/AUTO-OFF) key to select dAoF (Disable AUTO_OFF) on the LCD. Please note that the default setting after power on is EAoF (Enable AUTO_OFF) so dAoF (Disable AUTO_OFF)must be set every time the instrument is switched on.
) to select Lo6. Push (ENTER/MENUE) to confirm.
) to select automatic storage (Auto). Push (ENTER/MENUE) to confirm.
) to select to create a new file (nLo6). Push (ENTER/MENUE) to confirm.
) to select the time interval of 1 minute (1 Π). Push (ENTER/MENUE) to confirm. Push (ESC) to revert to the measuring mode i.e., the state where the readings are shown on the LCD.
) to select bLE.
) to select on and press (ENTER/ MENUE) to confirm.
) to select bLE.
) to select off and press (ENTER/ MENUE) to confirm.