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TECHNICAL BULLETIN
10 July 2014
Issue 14-7.8
Revised MX6 Refuge Chamber
Maintenance Recommendations
Industrial Scientific’s MX6 Refuge Chamber kit is an approved MSHA Part 7 Air Monitoring component.
Please see below for revisions to the monthly maintenance procedures and two warnings to ensure your
instrument is working properly.
Revised Monthly Maintenance Procedure
The previous recommendation instructed users to remove the alkaline battery pack and install a
spare battery pack before performing monthly maintenance. The previous recommendation then
stated the user should reinstall the alkaline battery pack once maintenance was complete as the pull
tab should only be removed with a deployed refuge chamber in an emergency situation.
The new recommendation is to remove the pull tab monthly and perform all maintenance steps
using the alkaline battery pack. Three new alkaline batteries and a pull tab should be reinstalled
prior to returning the instrument to the case. Please see the next page for an excerpt from the
updated “Use and Service Instruction Manual” with additional details on the new MSHA-approved
process.
Caution – Over Tightening Instrument Screws
Over tightening screws may permanently damage the instrument, particularly the battery pack.
Please consider using a torque screwdriver with a 65 in-oz. specification.
Caution - Sample Tubing Damaged during Kit Repackaging
Sample tubing may be permanently damaged if compressed by the case lid if the contents are
repackaged incorrectly. Once the tubing is damaged, the instrument’s pump may not properly
deliver a sample to the sensors and cause the instrument to produce a pump fault. Please be careful
to always repackage the case properly.
Updated instruments manuals (Part# 17148420) and spare pull tabs are available (Part # 17155260).
For additional information on the MX6 Refuge Chamber kits, contact us by email at
or by phone at 1-800-DETECTS (338-3287).
Sincerely,
Global Product Manager, Multi-Gas Solutions
