Jenway 3540 User Manual
Page 6
The Enter key confirms selections as they are made in the set up menus. With the
measurement screen displayed it acts as the Store [STO] key and stores the current
readings in the internal memory. Up to 250 pH and conductivity readings can be stored. The
action taken when the memory is full can be selected in the data logging set up menu.
The four Cursor keys enable easy navigation through the set up menus, as well as selection
of the required screen on the tabbed menu bar. The Up or Down Cursor keys are also used
to select alternative measuring modes from the highlighted channel on the main
measurement screen.
1.3 Outputs
The Model 3540 has RS232 serial, analogue and alarm outputs.
The serial output includes data for both channels as displayed on the measurement screens.
The analogue output can be switched between the pH and conductivity measurement by
highlighting the required channel on the tabbed menu bar. The alarm function can be set
independently for each channel with high and low options for every mode of operation. The
‘open collector’ output can be used directly for low current switching, or via relays for other
control functions.
Rear Panel showing output connectors
1.4 Electrode
Selection
The performance of any electrochemistry measurement system is highly dependent on the
selection of appropriate sensing electrodes suitable for the sample being measured. Jenway
offer a comprehensive range of pH and conductivity electrodes with versions suitable for
most applications and sample types. For help or advice on choosing the best electrodes for
your application contact
or visit
www.jenway.com
.