Hanse VTC Series Manuel

Operation,

and

Maintenance Instructions

for

Hanse Environmental, Inc.

VTC Series

Rev H 2018

Blank Page"

Authorization and Copyright of this document is

controlled by Hanse Environmental Inc.

2

Introduction 5.............................................................................................
Safety Information 6...................................................................................
Liquid Nitrogen Safety 7.............................................................................
Precautions 8.............................................................................................
Training 8...................................................................................................
Chamber Safety Features 9.......................................................................
Speciﬁcations and Utility Requirements 11................................................
Service Connections 11..............................................................................
Chamber Construction 12..........................................................................
Features and Performances 14..................................................................
System Features 14...................................................................................................
Performance 15.........................................................................................................
Options 16.................................................................................................................
Chamber Controls and Instrumentation 18................................................
Operation 20..............................................................................................
Starting Chamber from Off. (SOP) 21........................................................................
Temperature System Operation - Manual 22.............................................
Temperature System Operation - Computer Control 22.............................
Vibration System Operation 22..................................................................
Calibration 23.............................................................................................
Calibration of the Dytran 4007 Quad Sensor Conditioner 27....................................
IMI Model 682B03 ICP Vibration Transmitter 29.......................................................
704-GRMS System Calibration (Chambers Pre 2006) 30.........................................
Simulator Circuit 34...................................................................................................
Block Diagram 35......................................................................................................
Input and Output Diagram 36....................................................................................
Sensors 37.................................................................................................................
Ultrasonic Humidiﬁcation Systems 38........................................................
System Maintenance 40.............................................................................
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Monthly Maintenance 40............................................................................................

Daily Maintenance 41................................................................................................

Vibration Table Maintenance 44................................................................................

Performing Auto Calibration LN2 Valve 45................................................................

Identiﬁcation of Parts (Worchester with Proximity Positioner) 45..............................

Pre Auto Calibration Checks 46.................................................................................

Auto Calibration Background 47................................................................................

Auto calibration of Proximity Positioner Ln2 Valve. 48..............................................

Programing Custom Valve Curve 50.........................................................................

Vacuum Jacked Valves 54.........................................................................................

Units with Steam Humidiﬁer, See OE manuals for your system. 55..........................

Vibration Flow chart 55..............................................................................................

Service Notes: 62......................................................................................................

Addendum: 63...........................................................................................................

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Introduction

#The Vibration Temperature Chamber system oﬀers you the ability to excite

products with multi-axial impact vibration while simultaneously exposing your product-

under-test to extreme temperatures at very rapid change rates. This combination has

proven to be an extremely eﬀective means of identifying failure-prone components and

assemblies in the shortest possible time. The unique characteristics of the Hanse

Environmental Inc. temperature and vibration systems are of key importance in

achieving this eﬀectiveness.!

#You are urged to carefully read the following pages, and particularly the

SAFETY section, (immediately following), before installing or operating this equipment.

This will result in safer operation, longer equipment life, more eﬀective testing, and

probably a lot less frustration too!!

#The staﬀand employees of Hanse Environmental, Inc. thank you for choosing

our product. Please don't hesitate to call us with any questions or comments that you

may have.!

Hanse Environmental, Inc!

235 Hubbard Street

Allegan, MI 49010

Phone: (269) 673-8638

Fax: 866-272-6515

Email: Info@HanseEnv.com

Web Site: www.HanseEnv.com

Authorization and Copyright of this document is

controlled by Hanse Environmental Inc.

5

Safety Information

Your Hanse Environmental Inc. Equipment is provided with several safety systems

designed to help prevent accidental damage to product and equipment, and avoid

injury to personnel. Always operate this equipment in accordance with the procedures

set forth in the OPERATION section of this manual. The safety systems described

below should be checked at least once every 30 days, and any inoperative or

questionable conditions must be corrected before resuming operation. Only properly

trained personnel must do servicing of this equipment and its associated utility service!

Compressed air, liquid nitrogen, and high voltages can all cause severe injury or death

if not properly handled.!

WARNING!

HIGH SOUND LEVELS!

The vibrators produce extreme sound power levels, which may cause temporary

or permanent hearing damage, particularly after prolonged exposure. Do not

attempt to operate vibration equipment with doors open unless all aﬀected

personnel wear adequate hearing protection!

WARNING!

EXTREME TEMPERATURES AND PRESSURES!

This equipment produces extreme temperatures and uses high pressure ﬂuids.

Failure to follow instructions and use proper safety precautions can cause injury

or death.

WARNING!

ASPHYXIATION HAZARD!

This equipment uses LIQUID NITROGEN (LN2), which can displace oxygen and

cause severe injury or death due to a lack of oxygen.

ALWAYS allow adequate time for ventilation after opening doors before entering

workspace! NEVER operate this equipment unless all exhaust ports are securely

ducted to outside of building "

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Liquid Nitrogen Safety!

Properties: Liquid Nitrogen

•# Liquid Nitrogen has a boiling point of -195.8°C !

•# Volume of expansion liquid to gas (at 15°C, 1 atm.) = 682.1 !

•# Sg = 0.808 (at -195.8°C). !

•# Density of liquid (normal boiling point, 1 atm.) = 0.807 g/cc !

•# Colorless, Odorless liquid similar in appearance to water. !

Known or Expected Hazards

Temperature Related

•# The extremely low temperature of the liquid can cause severe burn-like

damage to the skin either by contact with the ﬂuid, surfaces cooled by the ﬂuid

or evolving gases. The hazard level is comparable to that of handling boiling

water. !

•# The low temperature of the vapor can cause damage to softer tissues e.g. eyes

and lungs but may not aﬀect the skin during short exposure. !

•# Skin can freeze and adhere to liquid nitrogen cooled surfaces causing tearing on

removal. !

•# Soft materials e.g. rubber and plastics become brittle when cooled by liquid

nitrogen and may shatter unexpectedly. !

Vapor Related

•# Large volumes of nitrogen gas are evolved from small volumes of liquid nitrogen

(1 liter of liquid giving 0.7 m3of vapor) and this can easily replace normal air in

poorly ventilated areas leading to the danger of asphyxiation. It should be noted

that oxygen normally constitutes 21% of air. Atmospheres containing less than

10% oxygen can result in brain damage and death (the gasping reﬂex is

triggered by excess carbon dioxide and not by shortage of oxygen), levels of

18% or less are dangerous and entry into regions with levels less than 20% is

not recommended. &!

Risks

For an untrained person, the risk of injury is moderate with cryogenic burns the most

likely injury. However in exceptional circumstances when large amounts of material are

spilled in an enclosed space, asphyxiation may be fatal.!

Who is likely to be injured?

The most likely injury is to the person using the material although following major

spillage all inhabitants of a room may be aﬀected. !

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7

Precautions

Operation

•# Liquid nitrogen should never be used except in a well-ventilated area.

•# Only containers or ﬁttings (pipes, tongs etc.) that have been designed

speciﬁcally for use with cryogenic liquids may be used as non-specialized

equipment may crack or fail. !

•# Skin contact with either liquid nitrogen or items cooled by liquid nitrogen should

be avoided as serious burns may occur. Care must be taken with gloves, wrist-

bands or bracelets which may trap liquid nitrogen close to the skin.&!

•# Plumbing components need to be brass, copper or stainless steel chosen to

meet the extreme cold and pressure requirements. You cannot use carbon

steel!!

Personal Protective Equipment

The following equipment should be worn when handling or dispensing liquid

nitrogen:

•# Face shield or safety glasses. !

•# Dry insulated gloves when handling equipment that has been in contact with the

liquid. NB there is dispute over the advisability of wearing gloves while handling

liquid nitrogen because there is a possibility that gloves could ﬁll with liquid and

therefore prolong hand contacts which would make burns more severe. If gloves

are worn they should be loose ﬁtting and easily removed.

•# Lab coat or overalls are advisable to minimize skin contact and also trousers

over shoe/boot tops to prevent shoes ﬁlling in the event of a spillage.

Avoidance of Oxygen Depletion/ Asphyxiation

•# Liquid nitrogen should normally be used only in a well-ventilated area.

•# Oxygen Sensors. Oxygen sensors and alarms should be in place in any area

where liquid nitrogen is to be used. Also recommended with the oxygen sensor

is an interlock system to shut down safety valves if oxygen level drops below

safe levels.

•# 19.5% Oxygen is set by OSHA

Training

•# New users of liquid nitrogen should receive instruction in its use from trained

members of the staﬀand should know the use of:!

o#Oxygen alarms!

o#Proper ventilation!

o#Emergency ventilation!

o#Evacuation plan!

o#LN2 supply shutoﬀprocedure.!

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8

Chamber Safety Features

Door Interlock Switches:

One door on each side is provided with a sensor, which will interrupt heat, cool,

vibration, and optional humidity operation when the doors are open. These sensors are

located near the top of each of the chamber doors. Operation of the vibration system

with a door open can cause eardrum damage due to the high sound power levels

produced. Do not open doors without switching oﬀthe vibration system ﬁrst, and do

not operate the equipment unless all door interlocks are functioning properly.!

Note: door interlocks do not protect Access ports and plugs. They can also leak a

signiﬁcant amount of sound energy when open, although typically not enough to cause

injury. Since they are provided for cables and hoses supporting product under test, it

will often be necessary to operate the equipment with one or more of these port covers

open. Packing the port with foam or other material rated for anticipated temperature

ranges will greatly reduce noise leakage. !

Be absolutely certain that no one is directly in front of an open

access port before switching on the vibration system!!

Interlock Safeties:

Multiple safety devices are interlocked such that heat, liquid nitrogen and vibration are

inhibited when any of the safeties are activated. Safeties items include but are not

limited to:

•# Door closed limit switches!

•# High and Low air temperature limit controller!

•# Event control of heating and cooling!

•# Auxiliaries on motor starter!

•# Phase Load Monitor (PLR)!

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9

Temperature High/Low Limit Control:

A user-programmable limit is provided by the Watlow F4 alarms. Alarm 1 is setup for

use with the product thermocouple (input 3). When the limit is tripped the safety valves

and contactors power down to prevent additional temperature changes.!

Vibration High Limit Control:

A user-programmable limit is provided by the Watlow F4 alarms. Alarm 2 is setup for

use with the vibration signal (input 2). When the limit is tripped the safety valves power

down and bring the vibration to a halt.!

Secondary High Limit Control:

In addition to the user-programmable Hi/Lo limit control there is a Watlow series 97

(Older) or PM EZ-Zone Limit (New). It is a secondary adjustable control is provided to

protect the chamber from high temperature damage. This device senses air

temperature near the electric heat elements in the plenum area and will shut down the

system if plenum temperatures exceed safe limits due to causes such as airﬂow

obstruction or failure, heat controller failure, or excessive product loading with

insuﬃcient cooling (such as occurs when running out of LN2).!

This secondary limit can be reset by pressing the reset button located on the controller. !

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10

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