Jenway 3540 - Manual (Page 55)

the Enter key to accept this value. Use the up or down arrow key to adjust other
alarm settings as required or press the ESC key to escape to other menu levels or
return to the main measurement screen.
5.44
pH Endpoint Set Up
All measurements made with electrochemical sensors are subject to a response time
for the sensor to equilibrate to the sample conditions and while the temperature
sensor compensates for temperature differences between samples and ambient
conditions. This response time will vary dependant on the sample, sensor(s) and
measurement conditions, a special algorithm can automatically determine when the
reading has reached a stable condition and the endpoint is reached. The Endpoint
icon will then be displayed and an optional audible alarm can be enabled. The period
over which the instrument looks for stability can be adjusted for special applications
where slow changes, reaction rates and special probe types are used.
Measurement display showing two endpoint icons
To adjust the Endpoint Detection settings select Endpoint Detection Set Up… in the
Conductivity Set Up menu and press the Enter key to display the menu as follows…
Endpoint Detection Set Up menu
5.45 Endpoint Detection
The automatic endpoint detection can be enabled (default) or disabled. In the later
case results can be recorded by observation of the reading or on a timed basis using
the data logging functions.
To change the Endpoint Detection setting press the down arrow key to highlight
Endpoint Detection in the End Point Detection Set up menu then press the Enter key.
The highlight will move to the current setting. Use the up or down arrow keys to
toggle between Enabled (the default setting) and Disabled, press the Enter key to
select your preferred setting when it is highlighted on the display. Then use the ESC
key to return to other menu levels, the main measurement screen or continue with the
other endpoint settings as follows.