Maintenance - HMK15

HMK15 User Guide

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User guide

Depending on the frequency of use and the general operating conditions, the salt solutions maintain their characteristics for 6 … 12 months, after which they must be replaced. Perform a visual check every 2 … 3 months. There must be a minimum of 10 % of undissolved salt at the bottom of the chamber (max. 90 %). The salt must be clean, otherwise it must be reprepared.

LiCl solution may crystallize on the surface, but there may still be solution under the surface. In this case, stir the solution and check it again the next day.

It is advisable to log the dates when salt solutions are prepared and other maintenance procedures are performed.

For correct calibration, it is essential that the salt chambers are tightly closed. Check the O-rings at each salt replacement. If they are damaged, replace them with new ones.

Table 1. O-rings used in HMK15
O-ring location Dimensions Type
Ø12.0 mm (0.47 in) measurement hole 12.0 × 2.5 mm NBR70
Ø13.5 mm (0.53 in) measurement hole 13.5 × 2.5 mm NBR70
Ø14 mm (0.55 in) measurement hole with ISO G1/2" thread in custom lid for DMT132 14.0 × 2.0 mm NBR70
Ø18.5 mm (0.73 in) measurement hole 18.3 × 2.4 mm NBR70
Transit cover 41.2 × 3.0 mm NBR70
Chamber 50.0 × 2.0 mm NBR70