NEW PRODUCT
Limit Comparator for Dual Wire Monitors
  • Calibrates Dual-Wire Monitor, item 222755
  • Selector knob to select resistance
  • Made in America,
    1 year Limited Warranty
Item
Description
Regular price
Internet Price*
Limit Comparator for Dual Wire Monitors
£103.53
£98.60
*Only available when buying online
“The term "wrist strap" describes the combination of the wrist band, which should fit around the wrist making good skin contact, and the wrist cord which bonds the wearer to an earth bonding point.
The wrist band will normally be worn for several hours at a time so it needs to be comfortable while making good contact with the skin. It is a good idea to check the wrist strap every time it is applied. Constant on line monitors can be used so that any breaks will be immediately found.” [EN 61340-5-1 clause 5.2.7 Wrist strap]
“Where continuous monitoring is used, no additional [wrist strap] testing is required.” [EN 61450-5-1 A.5.2 Measurement method for wrist strap testing]
“In many EPAs [ESD protected areas] constant monitor wrist straps are used. These fall into two categories, dual wrist band and single wrist band. The dual wrist strap type using a split band is used with a two core cord.
The dual wrist strap type normally works using the resistance bridge method.
The single wrist strap type uses a single strap for both grounding and monitor purposes and has an a.c. signal injected which is used for monitoring purposes. This type has the advantage of using the simpler single wrist strap.” [EN61340-5-1 A.5 Wrist straps]
 
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