Hach SP-51 Manual Básico Del Usuario página 18

1. Remove the plug from the top port of the colorimeter. Refer to
2. Push HARD CAL. The hard cal LED is on continuously.
3. When the hard cal LED flashes, add two drops of Magnesium Standard Solution into the
colorimeter.
4. When the LED stops flashing and is on continuously, wait for the cycle to complete.
At the end of the cycle, the LED sets to off to show a successful calibration.
5. HARD CAL failure: When the LED starts to flash, push HARD CAL to confirm a hard cal failure.
Do steps 2–4 again.
6. Push ZERO CAL. The zero cal LED is on continuously.
7. When the zero cal LED flashes, add two drops of EDTA Solution, 10 g/L, into the colorimeter.
8. When the LED stops flashing and is on continuously, wait for the cycle to complete.
At the end of the cycle, the LED is set to off to show a successful calibration.
9. ZERO CAL failure: When the LED starts to flash, push ZERO CAL to confirm a zero cal failure.
Do steps 1–7 again.
10. Replace the plug in the top port of the colorimeter.
Section 8 Operation
After the instrument power is set to on, the SOFT LED flashes until the first reading cycle is
completed. The cycle takes 2 minutes. Then, the SOFT LED shows a stable green light.
The instrument operates maintenance-free for a minimum of 2 months. Periodically, do a visual
check to see if bubbles are in the tubing. If there are bubbles, look for an air leak. Refer to
Maintenance schedule
Section 9 Maintenance
Multiple hazards. Only qualified personnel must conduct the tasks described in this
section of the document.
9.1 Maintenance schedule
Table 4 shows the recommended schedule of maintenance tasks. Facility requirements and
operating conditions can increase the frequency of some tasks.
Task
Replace the reagent
Replace the pump tubes
Replace the tubing on page 20
Clean the colorimeter
Replace the sample conditioning filter
on page 20
Replace the fuse on page 20
3
Ambient operating temperatures more than 27 °C (80.6 °F)
4
Ambient operating temperatures less than 27 °C (80.6 °F)
18 English
on page 18 for maintenance tasks.
Table 4 Maintenance schedule
2 months 3 months 6 months 1 year As necessary
on page 19
on page 19
on page 20
Figure 13
D A N G E R
x
3
x
on page 16.
4
x
x
x
x
x