109
Maintenance
9.6 Upgrades, repairs, general maintenance
Only a qualified technician should service the sampler. For example, steps that require
knowledge of CMOS electrostatic discharge precautions and advanced electronics
training and should only be performed by a qualified technician. If you need assistance in
performing any of the following service steps, contact the manufacturer.
9.6.1 Electrostatic discharge (ESD) considerations
To minimize ESD risks, maintenance procedures not requiring power to the
sampler should be performed with power removed.
Delicate internal electronic components can be damaged by static electricity, resulting in
degraded instrument performance or eventual failure.
The manufacturer recommends taking the following steps to prevent ESD damage to
your instrument:
•
Before touching any instrument electronic components (such as printed circuit cards
and the components on them) discharge static electricity from your body. This can be
accomplished by touching an earth-grounded metal surface such as the chassis of an
instrument, or a metal conduit or pipe.
•
To reduce static build-up, avoid excessive movement. Transport static-sensitive
components in anti-static containers or packaging.
•
To discharge static electricity from your body and keep it discharged, wear a wrist
strap connected by a wire to earth ground.
•
Handle all static-sensitive components in a static-safe area. If possible, use anti-static
floor pads and work bench pads.
9.7 Internal maintenance items
The following items require access to the inside of the case for service:
•
Internal desiccant module
•
RAM memory batteries
Figure 37 Distributor assembly
1
Nozzle
4
Shaft
2
Distributor arm
5
Distributor tube
3
Distributor motor
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
Q-Pulse Id VM373
Active 29/10/2013
Page 109 of 122
