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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Murphy LLSB, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Murphy LLSB one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of Murphy LLSB. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Murphy LLSB should contain:
- informations concerning technical data of Murphy LLSB
- name of the manufacturer and a year of construction of the Murphy LLSB item
- rules of operation, control and maintenance of the Murphy LLSB item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Murphy LLSB alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Murphy LLSB, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Murphy service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Murphy LLSB.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Murphy LLSB item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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Page 1
LLS, LLSB, LLSR, LLSRB Series Models Lead Line Pressure Switches Installation and Operation Instructions LLS-93096N Effective 03-94 Section 05 Description The LLS Series is a pressure switch for applications where viscous liquids could plug the sensing orifice. LLS and LLSB models have a 2 inch NPT male connection which attaches directly into the p[...]
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Page 2
DIMENSIONS 2 Diaphragm 9-1/4 in. (235 mm) MAX. 3 in. (76 mm) 3/4-14 NPT Conduit Inlet 7/8 in. (22 mm) 1-1/2 in. (38 mm) 2-9/64 in. (54 mm) 2 in. NPT Process Connection 2-1/2 in. (64 mm) MAX. 6-1/2 in. (165 mm) MAX. Transmitting tube, 5 feet (1.524 m) std. 3/4 in. (19 mm) 2-1/2 in. (64 mm) 17/64 x 1/2 in. (7 x 13 mm) mounting holes (4 places) Sensor[...]
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Page 3
If switch trip point needs to be adjusted, see page 4. LLS Series Hook-up (all models) T o wire the LLS Series, use proper the electrical conduit. 1. A 3/4''-14 NPT inlet connection for conduit installation is provided at the top end of the switch enclosure (see opposite page– “Dimensions” for location). NOTE: The plastic plug (supp[...]
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Page 4
W ARRANTY A two year limited warranty on materials and workmanship is provided with this Murphy product. Details are available on request and are packed with each unit. 4 LLS Series Trip Point Adjustment if necessary (all models) NOTICE: If trip point is not specified, the switch will be set at appr ox- imately 50% of full scale. T o perform trip p[...]