Maintenance; Clean The Instrument - Hach NX7500 Manual Del Usuario

Option
Scaling factor
Colorize above upper limits
Upper limit 1 (yellow)
Upper limit 2 (red)
Colorize above lower limits
Lower limit 1 (yellow)
Lower limit 2 (red)

Maintenance

Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Do not disassemble the instrument for maintenance. If the internal components must be cleaned or repaired,
contact the manufacturer.

Clean the instrument

Clean the exterior of the instrument with a moist cloth and a mild soap solution and then wipe the
instrument dry as necessary.
To remove hard dirt, soak the sensor for some hours in a rinsing solution. Use a sponge if necessary.
Make sure that the sensor connector is always dry and clean.
Brownish dirt or points are unwanted material of iron or manganese oxides. Use a 5% oxalic acid or
10% ascorbic acid solution to clean the sensor. Make sure that the sensor touches the acid only a
short time and is then rinsed fully with plenty of water.
Note: Do not use alcohol, benzene, dilutor or other flammable material to clean the instrument.
Note: Do not scratch the glass of the windows.
1. From the Main menu, select Options.
2. Select Service mode to set the relay for the compressed air cleaning to HOLD.
Note: Service mode also disables measurements.
3. Remove the sensor from the basin or flow cell.
4. Clean the instrument.
5. Select Cleaning and push EXECUTE to clean the measuring window. Refer to
measuring window
6. When the cleaning is complete, push Service mode to remove the HOLD condition.
Clean the measuring window
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective
equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
Description
Sets the factor to calculate the value.
Select to enable the upper warning threshold.
Sets the first upper limit for the warning threshold.
Sets the second upper limit for the warning threshold.
Select to enable the lower warning threshold.
Sets the first lower limit for the warning threshold.
Sets the second lower limit for the warning threshold.
W A R N I N G
N O T I C E
on page 15.
W A R N I N G
Clean the
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