Hach astroTOC UV 4195-1010 Manuel D'utilisation page 23

5. Make sure that the reagent weights are at the bottom of the reagent bottles.
6. Make sure that there are no bubbles in the small (
manifold. Refer to
Bubbles in the tubing cause a "NO SPARGER FLOW" fault.
7. Make sure that the ½-inch wide vertical chamber located in the sparger manifold is full of bubbles
(TOC analyzers only).
8. Make sure that there are no bubbles in the small (
manifold.
Bubbles cause a "NO UV FLOW" fault.
9. Make sure that the bottom of the GLS U-tube is full of liquid and the liquid flows over the U-tube
to the drain. Refer to
10. Stop the analyzer. From the main screen, push
ENTER.
The UV lamps and pumps turn off.
11. Make sure that the concentration of the carrier gas decreases to less than 20 ppm.
a. From the main screen, push the up arrow two times.
b. Push ENTER to keep the Status screen shown.
The carrier gas concentration (ppm) is shown on the display.
If the carrier gas concentration is greater than 20 ppm, the carrier gas is not good, a leak is
present or the IR bench is out of calibration.
If the concentration quickly decreases to 0.0 ppm, the IR bench is out of calibration. Contact the
manufacturer for service.
Validate the installation
1. Start the analyzer. From the main screen, push
ENTER.
The UV lamps and the pumps turn on.
2. Close the enclosure doors.
3. Let the analyzer operate for 1 hour.
4. Do a validation.
5. If the mg/L concentration reading is not ±2% of the value of the span calibration standard, go to
Adjust the analyzer
6. Connect a sample source(s) to the sample inlet(s) and plumb the sample bypass outlet(s).
Adjust the analyzer
Adjust the analyzer if the analyzer fails the initial validation.
1. Make sure that the zero standard container is plumbed to the ZERO port.
2. Make sure that the span standard container is plumbed to the CALIBRATION port.
3. Put the sample inlet tubing in the span standard container.
4. Make sure that the reading on the flow meter is within the correct range. Refer to
5. From the main screen, push the up arrow two times. Push ENTER to keep the Status screen
shown.
The CO reading is shown on the display.
2
6. Turn the flow adjustment knob until the CO
for the correct line voltage frequency (50 or 60 Hz). Refer to
7. After 10 minutes, do step
Set the carrier gas flow rate to between 30 and 150 cc/minute.
Figure 2 on page 7.
Figure 2 on page 7.
on page 23.
6 again.
1
/ -inch) tubing located to the left of the sparger
8
1
/ -inch) tubing located in the UV reactor
8
until "Stop Analyzer" is shown, then push
until "Start Analyzer" is shown, then push
reading on the display is the value shown in
2
Figure 10
Table 7.
Table 7
on page 19.
English 23