Maintenance; Cleaning; Changing Sensor Pack; Changing Sensor Filter - 3M 740 Serie Instrucciones De Uso

MAINTENANCE

Do not attempt to clean instrument by rubbing with a dry cloth. Cleaning with a dry cloth may generate a static charge and result in an explosion if located in a hazardous environment.
CAUTION
Avoid the use of harsh cleaning materials, abrasives and other organic solvents. Such materials may permanently scratch the surfaces and damage the display window,
labels, or instrument housing.

Cleaning

Cleaning of the external surfaces is best carried out using a damp cloth with a mild detergent or soap.
Do not open the 70 series detector in a potentially hazardous area. Failure to do so may result in sickness or death.

Changing Sensor Pack

Use only approved parts as supplied by M and listed in the PRODUCTS, ACCESSORIES AND PARTS section.
When the sensor pack expires or is not functioning, you will need to replace it in order to continue using the instrument. To change the sensor pack:
1. Undo the  screws on the rear of the unit and remove back cover plate.
. Remove Li-ion or alkaline batteries.
. Undo the two screws that retain the sensor pack – retain these screws (Fig. 6).
. Pull the sensor pack from unit (Fig. 7).
5. Make sure that the "zebra strip" is in position (Fig. 8). Place replacement sensor pack into unit and replace screws.
6. Replace battery and back cover plate.

Sensor Pack Screws

IMPORTANT – When re-assembling the unit, inspect the rubber gasket for damage and ensure it is seated properly between the front and back cover. Do not use the unit
if any damage is observed.

Changing Sensor Filter

The sensor filter should be replaced whenever it is damaged, dirty or becomes clogged.
To change the sensor filter:
1. Undo the  screws on the rear of the unit and remove back cover plate.
. Remove Li-ion or alkaline batteries.
. Undo the two screws that retain the sensor pack – retain these screws (Fig. 6).
. Pull the sensor pack from unit (Fig. 7).
5. Use a fine-tipped screwdriver to pull up edge of the filter (Fig. 9).
6. Pull filter from the plastic. Remove any excess adhesive from the plastic.
7. Remove backing from replacement sensor filter and place into plastic.
8. Replace sensor pack, battery and back cover plate.
9. Ensure that there is no damage to the rubber gasket and that it is seated properly.
Fig. 6
WARNING
WARNING
Fig. 7

Removing Sensor Pack

17
Fig. 8

Zebra Strip

Fig. 9

Replacing the Sensor Filter