BUCHI ELS Detector C-650 - Manual (Page 26)

C-650 Operation Manual, Version B 5 Putting into operation 26
flask. This adjustment requires only a small rotation of the knob. Too big rotation could
generate too high back pressure (about half clockwise rotation).
NOTE
The flow splitter is delivered equipped with a black restriction capillary having a 0.10 mm ID. This
configuration is especially suited for normal phase separations using solvents with low viscosity.
For reversed phase applications using solvents with viscosities higher than 0.5 cP, this capillary
must be replaced with the violet restriction capillary having a 0.15 mm ID (Art No 11059075).
5.6.3 Connecting to the ELS nebulizer
1. Stop the pumping system.
2. Connect the splitter to the ELSD nebulizer using the provided union fitting
(Art No 044302) (position c in Fig 5.12).
5.7 Powering up the device
Place the ON/OFF switch to the OFF position and plug the device into the wall socket. Turn on the
unit via the ON/OFF switch. The display will present the version number and date it was created
for a few seconds (the version number should be recorded as it may be required for service or
troubleshooting) and will then present the Software option information (activated or not) and then
will present the signal (which should be 0 mV or very close to it), the temperature (which should
be the ambient temperature), the pressure (which should be zero or very close to it) and the gain.
Avoid leaks at all connections and check for leakages when you switch the pump on. Install the
black front panel cover, first fix its right side, and then push its left side.
NOTE
The liquid level in the siphon must be stable and should be equal at both sides. If the vacuum is
too strong, liquid is drawn into the evaporation tube or generate air bubbles from the drain tube
and both resulting in bad measurement results.
5.8 Control panel
The Control Panel (Fig 5.13) includes a digital display and a number of buttons that are used to
enter data.
Fig 5.13: Control panel
5.8.1 Digital display
The digital display presents information about the present status of the detector and is used to
enter a variety of parameters. When the detector is switched on, the display will show a greeting
message for a few seconds which includes the version number and date.