General Description; Specifications; Installation - Sentry P2B-4/7 Installation, Operation & Maintenance Manual

General Description

The Sentry® P2B-4/7 is a manually-operated explosion-proof sampler controller used to operate the Sentry RX, Sentry
PR, or Sentry ISOLOK® samplers . The sampler controller is connected to a pneumatic solenoid . The sampler controller
can be used to control the size and frequency of the sample .

Specifications

The Sentry P2B-4/7 sampler controller is suitable for use in the following environments:
ƒ Class I, Div 1 & 2 Groups C & D,
ƒ Class II, Div 1 & 2, Groups E, F & G .

Installation

ƒ Installation should be performed by qualified personnel in accordance with local codes and procedures .
ƒ If the sampler controller is to be mounted near the sampler, then the sampler controller must meet the National
Electrical Code for the area . (Sentry Equipment Corp supplies electrical components to meet the standards specified
by the customer . For example, class, division and group as outlined in the National Electrical Code .)
ƒ Mount the sampler controller in a location that is easily accessible .
ƒ Mount the sampler controller in a vibration-free location and have a qualified electrician wire the sampler controller
to the collection system, motor, limit switch, solenoid (pneumatic), electrical supply, etc .
ƒ The sampler controller should be hard wired to instrument-quality power using appropriate certified conduit,
fittings, and wiring or cable .
ƒ For fixed wiring methods, the ground conductor shall have green with a yellow stripe as the insulation .
ƒ Surge suppression and filtering is recommended but not required .
ƒ A suitable external over-current protection device—e .g ., a fuse or circuit breaker (15 A)—and a disconnect device
are recommended .
– The over-current protection and disconnect devices shall be installed on both the hot (L) and neutral (N) leads .
– The disconnect device shall be located near the equipment and marked with appropriate ON(1) OFF(O) markings
as specified by local codes .
 NOTE
When penetrating the sampler controller enclosure, use tubes & fittings that maintain the environmental rating of the
enclosure .
6 Sentry Equipment Corp