Replacing The Battery And Electronics Compartment Desiccant; Maintaining The O-Ring Gasket On The End Cap; Cleaning The Flow Meter; Storing The Flow Meter - Hach 910 Instrument Manual

Section 5

5.2.3 Replacing the Battery and Electronics Compartment Desiccant

5.3 Maintaining the O-Ring Gasket on the End Cap

5.4 Cleaning the Flow Meter

5.5 Storing the Flow Meter

Page 38
Maintaining the O-Ring Gasket on the End Cap
A small desiccant cartridge in the battery compartment prevents moisture
damage to the batteries and power circuitry. The electronics compartment
desiccant cartridges should be changed whenever you service the electronics
(see section 5.6 on page 39) to assure a moisture free environment inside the
enclosure. Table 9contains replacement part numbers.
If the normally blue desiccant beads turn pink, replace the cartridge or
remove the cartridge end cap and recharge or replace the desiccant material.
See Reusing Desiccant on page
A small clip holds the desiccant cartridge in place. Pull the cartridge straight
out of the clip to remove it.
Table 9Replacement Desiccant
Description
Model 910 Battery Compartment Desiccant Cartridge
Model 920 Battery Compartment Desiccant Cartridge
Model 930 Battery Compartment Desiccant Cartridge
Electronics Compartment Desiccant
(2 cartridges are required for Model 930)
Bulk Desiccant Refill (1.5 lb.)
Two O-ring gaskets are installed in each end cap of the flow meter. They
maintain the water tight seal on the flow meter. Use care when the end caps
are removed—do not soil, cut, or nick the gaskets. Replace them immediately
if any physical damage is apparent. A light coating of O-ring lubricant is
sufficient to maintain a water-tight seal.
gaskets.
Note: Do not use petroleum jelly to lubricate the O-rings.
Table 10Replacement O-rings
Description
Model 910 End Cap O-ring
Model 920 End Cap O-ring
Model 930 End Cap O-ring
Clean the outside of the logger case with warm water and mild detergent. Do
not use solvents or harsh cleaners to clean the logger. Do not use high
pressure washing equipment to clean the case.
Remove the 6 volt alkaline batteries from the logger when storing for long
periods (more than 3 months). Store the sensors in a dry area. Make sure that
all desiccant materials in the probes are kept fresh (blue) at all times.
37.
Table 10lists replacement O-ring
Part Number
4933
4933
4936
4933
3624
Part Number
4912
4863
4807
Maintenance.fm