Chemtrac Auto Clean UV254, Руководство пользователя, Страница: 17 / 41

Chemtrac UV254 Monitor
– UVM5000 v 2.1
Chemtrac, Inc. 16
8 Calibration (Zeroing)
The monitor must be calibrated before accurate UVT/ UVA data can be read. Two methods for calibration can
be used:
•
Zero monitor to DI or RO water reference of 100% UVT
•
Zero monitor to a known water value
The first method is using 100% transparency as the standard by which the monitor is zeroed, whereas the
second method uses a known transparency. Both are accurate, but the second method allows for greater
accuracy because the expected measured values are presumably clustered around the known value instead of
falling within a wider range in the measurement scale.
8.1
Using RO or DI Water Method
Carry out these steps using a fresh supply of DI or RO water:
1. Close the monitor door and secure both door clamps.
2. Make sure the monitor is powered up.
3. Shut off the water supply to the monitor if not already
done.
4.
Disconnect the ¼” supply tubing at the inlet connection
on the monitor.
5. Fill the supplied wash bottle with DI/RO water and
connect the ¼” bottle tubing to the inlet connection on
the monitor.
6. Hold a finger over the small vent hole in the wash
bottle cap, as shown in Figure 8.1.
7. Squeeze the bottle to get the DI water to flow through
the monitor.
8. Once the fluid starts to flow remove finger from the
vent hole and place bottle on top of the monitor, as
shown in Figure 8.2. The fluid should continue to flow
through the monitor. If it stops go back to step 6.
9. The LCD display should display a UVT or UVA reading
(depending on display mode).
10. Let about half the DI water run through the monitor
before pressing the Zero button. Use the down arrow
to select “Zero to DI Water”. Then press “Enter” and
the monitor will calibrate itself to 100% in UVT mode
or 0.000 in UVA mode.
11. The monitor has now been calibrated to DI/RO water.
Disconnect the wash bottle hose from the inlet of the
monitor.
12. Connect the supply line to the monitor and open the
valve to start the flow running.
Figure 8.1: Setting up flow
Figure 8.2: Bottle on top of cabinet