MKS 41A - Chapter Three: Overview; General Information; Labels; Serial Number Label

Chapter Three: Overview General Information
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Chapter Three: Overview
General Information
The 41/42/51/52 pressure switch output is represented by a change of state of relay contacts to
indicate when the pressure of the system exceeds a factory set pressure value.
Note
The trip point pressure value cannot be changed in the field.
Labels
The mini-pressure switch has two identification labels; a serial number label and a trip point
action label.
Serial Number Label
Every mini pressure switch carries a serial number label, as shown in Figure 7.
41A11DCA2AA000
Serial #:
Model #:
000031552
Input: +20 - 30 VDC
Range: 10 TORR
%
%$
$5
5$
$7
7521
521
3
35(
5(668
6685
5( 6
(6:
:,7&+
,7&+

MADE IN USA
Trip Pt: 0 TORR-G
Figure 7: Serial Number Label
The serial number label lists the input requirement, the full scale range, the trip point, and the
action of the trip point relay. In addition, it displays the “CE” symbol to denote compliance with
the CE directive.