Measurement - Hanna Instruments BL120 Instruction Manual

8.2. MEASUREMENT

Start the recirculation pump. Verify flow cell fills correctly
After setting up the pump controller, probe and required accessories the controller is ready.
Turn on the controller by switching ON/OFF button. After initialization has been completed, the controller displays the
measurement screen.
A warning message will be displayed at startup if the Acid pump or Cl
was turned off .
Select the Manual mode to prime pumps, check pump functions and ensure there are no leaks in the system.
Fittings may require tightening. Verify reagents are being pumped by selecting pH, then Cl
To add additional time to Manual pump, press Add 10s. To verify probe is measuring, press MENU. A pH, mV and temperature
value should be displayed.
• If Auto is selected, the controller enters in measurement screen, automatically selecting the Auto function for the pumps.
• If Manual is selected, the controller displays the MENU screen, allowing the pump status to be manually set. After setting
the pumps, press MENU to enter measurement mode.
In Measurement mode, there are three display configurations. Press the  keys to switch between the configurations.
• Three parameters screen – is the default screen, displayed at start up with all measured parameters.
• Single parameter screen – allows better viewing from a distance. The three parameters (pH, ORP and temperature), cycle
automatically every 3 seconds.
• Real time plot screen – is a plot representation of the last measurement for selected parameter. The first functional key
selects the parameter and the title bar displays the current value for the selected parameter. The second functional key
selects the Y axis zoom option: Normal (no zoom) and Autosize (zoom enabled). The Rec. Log functional key enters the
controller logs.
36
(BL12X-20 only).
Pump was not left in Auto mode when the controller
2
pumps.
2