28 Ultrasound Controller Manual
7. Gel Sensor Mode
Gel Sensor Mode can measure the presence and concentration of gel media, used in
chromatography systems. It can measure single levels of gel and gel concentration behind the
container wall. The Gel Sensor senses through the wall (no hole is needed). Four single levels
can be measured with one Ultrasound Controller. Level Switch KS (or Level Switch QS containing
four sensors) can be used as gel sensors.
GSF90 is a gel sensor to be installed inside the column. It uses a higher frequency (4MHz) and
must be connected to G72 or GP72. Up to four GSF90 can be connected to one G72 or GP72.
Quick start guide
Install Gel Sensors (Level Switches) according to instructions in the Level Switch Manual.
Connect cables, see Connecting the Gel Sensor.
Switch on external power supply. You may have to press POWER to activate D128.
You may read about navigating the menu system, page 8
Display show: SET sensor MODE. Press MENU button to scroll to Press SELECT for Gel Sensor
mode. Confirm by pressing SELECT button.
Go to SETTINGS to set parameters, page 31
Calibrate Gel Sensors with liquid. Make sure liquid level is above and gel level is below the
Gel Sensors. Select Calibrate Liquid 1- 4 together and press SELECT button one second.
Go to SHOW DATA to check values, page 32
Ready to use.
Connecting the Gel Sensor
The cable from the Gel Sensor
should connect directly to the
Ultrasound Controller. The
cable screen must always be
connected to Ultrasound
Controller (and screened cable
must always be used). Any
unscreened part of the cable
should be no longer than
30mm. To minimize the risk of
electric interference it is
important that sources of
interference like frequency
inverters should use screened
cables between inverter and
motor.
Ultrasound
Controller
Terminal
Cable screen & Yellow &
Green & Ground
Cable screen & Yellow &
Green & Ground
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