Hach 9525sc DCCP System Manuel De L'utilisateur page 17

Section 4 Startup
Burn hazard. The heater surface and surrounding area gets hot. Do not touch.
Burn hazard. Obey safe handling protocols during contact with hot liquids.
1. Examine the resin beads in the resin column. Refer to
2. Replace the resin beads when the resin beads nearest to the color indicator label on the resin
column are brown/orange. Refer to
Note: The color change of the resin beads starts at the top and continues to the bottom of the resin column.
New resin beads are dark purple.
3. Set the flow rate of the cooling water flow as follows, if applicable:
a. Use the shutoff valve at the cooling water outlet to adjust the flow rate of the cooling water to
approximately 0.8 L/min (0.2 gal/min).
b. Make sure that there are no leaks at the cooling water fittings.
4. Set the flow rate of the sample water as follows:
a. Open the shutoff valve for the sample water inlet.
b. Turn the sample flow valve to set the flow rate of the sample water to between 100 to
150 mL/min. Refer to
c. Make sure that there are no leaks at the sample water fittings.
5. Set the instrument to on. Refer to the illustrated steps in
• The power indicator light comes on.
Note: The power indicator light starts and stops with the heater.
• The heater increases the sample temperature to the boiling point of water.
6. Wait for the temperature that shows on the left display of the temperature controller to increase to
approximately 106 °C (223 °F). Refer to
Note: The temperature controller may not get to 106 °C (223 °F), based on local air pressure and temperature.
7. Examine the condensate water that comes out the condensate drain. When the temperature and
sample flow rate are set correctly, a small flow of condensed water continually comes out from
the condensate drain.
• If no condensate water comes out the condensate drain, decrease the sample flow rate (range:
100 to 150 mL/min) or increase the temperature setpoint (range: 106 to 108 °C, 223 to 226 °F).
• If drops of hot boiling water come out the condensate drain, increase the sample flow rate
(range: 100 to 150 mL/min) or decrease the temperature setpoint (range: 106 to 108 °C, 223 to
226 °F).
Refer to Set the temperature
8. Let the instrument operate until the reading(s) is stable (approximately 10 to 15 minutes).
W A R N I N G
W A R N I N G
Replace the resin beads
Figure 1 on page 7.
Figure 9
on page 20 to change the temperature setting.
Figure 1 on page 7.
on page 24.
Figure 8.
on page 19.
English 17