Appendix
A.3 Verification Sheets
SITRANS SL
198
Operating Instructions, 12/2010, A5E01132948-04
Wrist Straps
In many facilities, people are one of the prime generators of static electricity. Therefore, wrist
straps must be used while carrying out maintenance and service on the laser analyzer, to
keep the person wearing it connected to ground potential. A wrist strap consists of the cuff
that goes around the person's wrist and the ground cord that connects the cuff to the
common point ground.
Work Surface
An ESD protective work surface is defined as the work area of a single individual,
constructed and equipped to limit damage to ESD sensitive items. The work surface helps to
define a specific work area in which ESD sensitive devices may be safely handled. The work
surface is connected to the common point ground by a resistance to ground of 106 Ω to 109
Ω. This is done by using a soft bench mat, which is connected to ground, on the work
surface. All equipment must be connected to grounded outlets and all personnel must wear
wrist straps connected to the bench mat using a cord.
A.3
Verification Sheets
Instrument Verification
Albeit the SITRANS SL provides a high long-term stability due to the built-in, maintenance-
free reference gas cell, a verification should be carried out at regular intervals. Details of that
procedure are described in section 9.1. (Page 149)
This procedure should be documented using the appropriate verification sheet provided later
in this section. It can be separated from manual using a knife or a pair of scissors.