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9/17/2020
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QNW TC 1 User’s Guide
cooler.” Attach another piece of tubing from the second cuvette holder
water hose barb to the bucket
to serve as a drain tube. Add water to the bucket and lower the pump into the bucket, making sure
that the pump is below the water line. Using the electrical cable from the pump, connect the pump to
the socket on the back of the
TC 1
Temperature Controller
. The pump will start automatically when
the
TC 1
power is turned on later.
5.
OPTIONAL - If you plan to work at low temperatures, connect a source of dry gas (typically nitrogen)
to release upon the cuvette windows. Attach a length of tubing with ⅛-inch inside diameter to the
small dry gas hose barb on the base of the Peltier-controlled cuvette holder. Set the dry gas flow
rate to about 50 cc/min.
6.
Connect the electrical cable from the cuvette holder to the 15-pin, VGA-type connector labeled
“Sample” on the back of the
TC 1
Temperature Controller.
7.
Plug the power cable into the back of the
TC 1
Temperature Controller and into a wall socket.
2.2.
Starting the QNW TC 1 Temperature Controller
1.
Place the magnetic stir bar in a standard 1 x 1-cm square cuvette. Insert a liquid sample into the
cuvette.
2.
Place the cuvette in the cuvette holder.
3.
Place the plastic lid on the cuvette holder.
4.
OPTIONAL - If you wish to monitor the temperature inside the cuvette, plug a standard Series 400 or
Series 500 thermistor probe (not provided) into the ¼ - inch phone jack labeled “probe” in the back
panel of the
TC 1
. Place the end of the probe in a region of the sample in the cuvette where it will not
occlude the spectrometer light beam.
5.
Turn on the
TC 1
controller using the switch on the back panel. On the
TC 1
front panel, press once
on the right-arrow button and once on the SET button. These two steps turn on the pump by turning
on the temperature control. (The pump runs only when the temperature control is turned on).
6.
Check for water leaks.
7.
Check that water is flowing from the free tubing end. If it does not, lift the pump off the bottom of the
bucket, but not out of the water, and drop it. This usually will get the flow started. If it does not after
several tries, lift the pump up close to the water surface and let a small drop of liquid detergent land
in the water close to the pump intake.
8.
For now, turn the
TC 1
power off.
Figure 3
.
TC 1
Menu Button
9.
Use the left or right arrows on the Menu Button, shown in Fig. 3, to cycle through the four pages of
options. These options are described in detail in Section 2.3 below. To turn on stirring and set a