Brooks Instrument MT3810 - Manual (Page 23)

Installation and Operation Manual
X-VA-MT3810-eng
Part Number: 541B050AAG
December, 2008
Model MT 3810
Section 1 Introduction
1-17
1-5c Inductive Alarm Switches
Design Features
•
1 or 2 normally open inductive limit switches
• Optional intrinsically safe power supply/amplifier/relay unit
• For low or high limit signaling/switching
• Front adjustable
Description
1 or 2 electronic limit switches can be installed in the indicator housing to
allow initiation of signaling or switching functions on a preset flow value.
The limit switch operates as a slot initiator that is inductively actuated by a
disc mounted on the pointer shaft. Any flow value can be used for setting
the limit value by sliding the initiator along the indicator scale. Minimum
setting distance between two limit switches is approximately 40% full
scale. The position of the initiator also serves to visually indicate the set
value. Settings can be adjusted by removing the indicator cover, loosening,
moving and retightening of the alarm indication needle, and replacement
of the indicator cover.
Specifications - Inductive Alarm Switches
EMC Directive 89/336/EEC: EN 50081, EN 50082 and EN 61326-1
Hazardous Location Classification
Enclosure: Type 4X/ IP65
Ambient Temperature: -22°F> Tamb < 150°F (-30°C > Tamb < 65°C)
Intrinsically Safe
United States and Canada UL Listed, E73889, Vol. 1, Sect. 15
Class I, II and III, Division 1, Groups A, B, C, D, E, F, and G; T4
Europe – KEMA 01ATEX1235 X
II 2 G EEx ia IIC T4
II 2 D T135
o C
Entity Parameters:
Ui=Vmax=16 Vdc; Ii=Imax=25 mA; Ci= 50 uF;
Li= 250 uF
Non-Incendive
United States and Canada UL Listed, E73889, Vol. 1, Sect. 15
Class I, II, III, Division 2, Groups A, B, C,D F, and G; T4
Europe – KEMA 01ATEX1236
II 3 G EEx nA II T4
II 3 D T135
o C