Climatic Chamber for Explosives Testing (ISAT)

It is essential to determine the performance of various explosive filled components and their shelf-life during defence product development. Tests involving tropical exposure and intensified standard alternating trials (ISAT) are norm of such performance evaluation process and our customised Climatic Chamber is designed to do it with ease. The 7,200 litre chamber can perform both ISAT (A) & ISAT (B) tests which is based on the alternations between temperature, humidity and ambient conditions (with condensation) and has a small element i.e. each week of dry heat to simulate tropical desert.

Overview

The monoblock construction has outer material primed with phosphate while RAL 7035 epoxy based electrostatic powder coating provides aesthetic look. The exterior surface has high wear resistance while the interior is made of pre-polished stainless steel with high gloss finish (1.2 mm thick) AISI-304 stainless steel with reinforce bottom floor to withstand heavy load. Between cell-wall and the outer house approximately 150mm PUF is provided. A large observation window is provided which is illuminated by a lamp to provide good test space view. Explosion proof fitting are used in chamber construction to meet IP55 regulation which are also impermeable and thermally isolated. Double construction sealing rings of silicon rubber is mounted on a thermal breaker strip to ensure complete sealing and zero conduction from the test space to the exterior.

Chamber’s performance is evident from its uniform air and temperature distribution while its humidity range makes it compatible to test as per many of the latest test standards. Although ISAT was originally designed for ordnance ammunition and small arms reliability testing but now plays significant role in rocket component testing especially in rocket motors. It has been of special value as a test of igniter designs because of the potentially bad effects of moisture on igniter compositions.

Got Technical Question!

Tech Spec

Description	Specification
Workspace Dimensions - WxDxH
mm	1200	x	5000	x	1200
In	47	x	197	x	47
Volume
Ltr	7200
Cuft	254
Temperature Range
°C	-50		To		80
°F	-58		To		176
Ramp Rates
Cooling °C/min	3
Heating °C/min	3

Controller

Communication

Ethernet

Ethernet capability to remotely monitor and control the chamber.

USB

USB Type-A host port to connect a keyboard or mouse or download CSV data via pen drive [max 2GB] USB Type-B data port for connection to PC for software upgrade and access memory card storage

Web Server

Built-in web server allows remote view or control from any internet connected PC, tablet or smart phone

NI Lab view

The communication which used is MODBUS RTU protocol, which is an international standard for communication in process instrumentation and automation. Necessary changes to be made in the user’s software to communicate this in MODBUS RTU universal protocol. This feature can be used manual mode only.

Hardware

Enhanced with modular controller integrating multi-zone PID control and data acquisition. SIMATIC programmable logic controller. Touch screen controller, PLC and other controller components are of a generic make with an OEM software. Free software upgrades up to one year.

Memory

SD card of 2GB memory will store all the test program data and also the diagnostic data. This card is accessible by USB and Ethernet.

Digital Events

1 digital output for switching test specimen via potential free contacts, load max. 24 VDC, 5A

Programming & Report Generation

Programs

99 independent programs can be stored with name and number. Each of these programs have segments which can be looped to a previous segment and repeated up to 999 cycles, creating almost unlimited number of segments The chamber can be operated in manual mode, where the set point can directly be changed in the home screen The ramp rate can be set as a value in °C/min or ramp time Graphical representation of the temperature program The time is logged only when the set valve is within the band.

Trend Graph

Real time trend graph for temperature set value, temperature process value, humidity set value and humidity process value. Options of zoom in/out, pan and individual plot selection

Safety & Security

Security

Multi level security of guest, user, admin and factory level users with individual password protection All settings can be reset to factory defaults using admin login

PID

6 zone based PID’s with auto recall of PID based on type of program, segment and zone can be set. Each of these PID’s can be set by using the auto tune feature or manually based on user’s requirements.

Process Mimic

Graphical representation of the working of the chamber, with live status of all the components, including the current temperature/humidity process values, compressor suction/discharge pressures and return gas temperature