![background image](http://html.mh-extra.com/html/omron/z4lb-v2/z4lb-v2_instruction-manual_1633323013.webp)
1
Laser Safety
xi
Require-
ments;
Sub-clause
Classification
Require-
ments;
Sub-clause
Class 4
Class 3B*
Class 3A
Class 2
Class 1
Emission
warning de-
vice
Not required
Gives audible or visible
warning when laser is
switched on or if capacitor
bank of pulsed laser is be-
ing charged
Attenuator
Not required
Gives means beside ON/
OFF switch to temporarily
block beam
Location
controls
Not required
Controls so located that there is no danger
of exposure to AEL above Classes 1 or 2
when adjustments are made.
Viewing op-
tics
Emission from all viewing systems must be below Class 1 AEL’s as appli-
cable
Scanning
Scan failure shall not cause product to exceed its classification
Class label
Required
wording
Figures A and B and specified wording
Aperture la-
bel
Not required
Specified wording required
Service
entry label
Required as appropriate to the class of accessible radiation
Override in-
terlock label
Required under certain conditions as appropriate to the class of laser
used
User in-
formation
Operation manuals must contain instructions for safe use
Purchasing
and service
information
Promotion brochures must reproduce classification labels; service manu-
als must contain safety information
Medical
products
Special calibration instructions required
Special calibration instruc-
tions, means for measure-
ment and target-indicator
required
Fibre optic
Cable service connections require tool to disconnect if disconnection
breaks protective housing and permits access above Class 1
* With respect to the requirements of remote interlock connector, key control, emission warn-
ing and attenuator, Class 3B laser products not exceeding five times the AEL of Class 2 in
the wavelength range of 400 nm to 700 nm are to be treated as Class 3A laser products.
Note:
1. This table is intended to provide a convenient summary of requirements. See text
of this standard for complete requirements.
2. AEL: Accessible Emission Limit
The maximum accessible emission level permitted within a particular class.
For your reference, see ANSI Z136.1-1993, Section 2.