Calibration, Maintenance, Maintenance schedule – Hach-Lange WPC-22 User Manual
Page 16: Clean the instrument, Clean the sensor flow cell
Calibration
The instrument cannot be calibrated by the user. Contact the
manufacturer for instrument calibration. Refer to the label on the
instrument for the calibration due date.
Maintenance
W A R N I N G
Multiple hazards. Only qualified personnel must conduct the tasks
described in this section of the document.
Maintenance schedule
shows the recommended schedule of maintenance tasks.
Facility requirements and operating conditions may increase the
frequency of some tasks.
Table 12 Maintenance schedule
Task
1 year
As necessary
on page 16
X
1
on page 16
X
on page 16
X
X
on page 17
X
1
Required to keep compliance with JIS B 9925-1997 standards
Clean the instrument
Clean the exterior of the instrument with a moist cloth and a mild soap
solution and then wipe the instrument dry.
Clean the sensor flow cell
N O T I C E
Do not insert the cleaning brush into the sample line fitting when the sensor flow
cell is dry or damage to the sensor flow cell may occur.
Periodically, clean the sensor flow cell. In addition, clean the sensor flow
cell before use if the instrument has not been used for a long time.
Items to collect:
• Factory supplied cleaning brush
• Clean water
1. Open the enclosure door. Loosen all four captive screws that attach
the enclosure door.
2. Set the power switch to off.
3. Stop the flow of water to the instrument.
4. Remove the sample line and drain line from the compression fittings.
5. Connect the sample line to the compression fitting on top of the
sensor assembly.
6. Start the flow of water to the instrument. After 30 seconds, stop the
flow.
7. Remove the sample line from the compression fitting.
8. Clean the sensor flow cell.
a. Pour clean water into the compression fitting on top of the sensor
assembly. The water will drain from the sample line compression
fitting.
b. Insert the cleaning brush into the compression fitting. Gently
move the brush up and down two or three times. Refer to
c. Pour clean water into the compression fitting on top of the sensor
assembly. This will rinse out any material that was loosened by
the brush.
d. Pour clean water over the cleaning brush to rinse out any
material.
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