Brooks Instrument Ar-Mite MT3750 Manual Del Usuario página 13

Section 1 Introduction
Brooks Ar-Mite
®
Figure 1-4 Model MT3750C with Reed
Switch Alarm
Table 1-8 Certifications - MT3750C With Reed Switch Alarm
Mark Agency Certification
Intrinsically Safe
Class I, Div 1, Groups A, B, C and D;
Class II, Groups E, F and G; Class III;
Encl Type 4X
CSA Non-Incendive
Class I, Div 2, Groups A, B, C and D;
Class II, Groups E, F and G; Class III;
Encl Type 4X
Intrinsically Safe: Entity Parameters, Vmax=30Vdc, Imax=100mA, Ci=0, Li=0
Figure 1-5 Reed Switch Wiring Diagram
1-6
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MT3750C
TM
Reed Switch Alarm
Two reed switches are installed in the alarm housing to provide signaling
or switching functions when a preset flow value has been reached. The
reed switches provide high, low or dual setpoints and latched output over
the full range. The switches are normally adjusted to the desired flow
range in the factory. Modifications to the switch settings can be made in
the field. Minimum setting distance between two switches is approximately
40% of the scale. (Reference Reed Switch Wiring Diagram Figure 1-5)
Data Reed Switch
Maximum Voltage*
Maximum Current*
Maximum Contact Rating* 3 Watts
(*Maximum Switch Specifications)
Electrical Classification
Non Incendive:
Maximum Voltage
Maximum Current
Maximum Contact Rating
175 Vdc, 124 Vac
250 mA
30 Vdc
100 mA
3 Watts
Applicable Standard Details
UL & CSA Standards 1788748
UL & CSA Standards 1788748
Installation and Operation Manual
X-VA-MT3750C-eng
Part Number: 541B063AAG
October, 2017