TM 10-6630-246-12&P
TM 09241B-12&P
Section V. UNIT MAINTENANCE PROCEDURES
4-7.
GENERAL.
The procedures in this section have been arranged in the order in which the items appear in the unit (0) maintenance level
column on the Maintenance Allocation Chart (MAC) which is provided in Appendix B. Step-by-step procedures have been
provided for all actions authorized to be performed by unit maintenance in the order in which they appear on the MAC.
4-8.
TURBIDITY TEST SET.
This task covers:
Repair
CAUTION
Battery must be removed from meter prior to shipment to avoid damage to equipment.
a.
Repair is limited to replacement of defective components only from turbidity test set. If turbidity meter is
defective, be sure battery has been removed prior to shipment. See paragraph 2-10 for battery removal.
b.
This meter is a precision piece of equipment and must be handled appropriately. Package the meter and
probe to prevent any shipping damage due to rough handling or the elements.
c.
Mark the shipping package to indicate that a fragile electronic instrument is enclosed.
4-9.
pH/TEMPERATURE TEST SET.
This task covers:
Repair
CAUTION
Battery must be removed from meter prior to shipment to avoid damage to equipment.
a.
Repair is limited to replacement of defective components only from pH/temperature test set. If
pH/temperature meter is defective, be sure battery has been removed prior to shipment. See paragraph 2-11 for battery
removal.
b.
The pH electrode tip is immersed in an attached bottle of storage/soaker solution. If this bottle is not full, refill
it using pH 4.00 buffer solution (figure 1-2, item 19). pH 4.00 buffer solution is a mixture of salts (Potassium Biphthalate)
which is non-hazardous and safe for any means of shipment.
c.
This meter is a precision piece of equipment and must be handled appropriately. Package the meter, pH
electrode, and temperature probe to prevent any shipping damage due to rough handling or the elements.
d.
Mark the shipping package to indicate that a fragile electronic instrument is enclosed.
4-4
