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Environmental Test Chamber
OPERATION & MAINTENANCE MANUAL
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Tenney Junior Test Chambers: Models TJR and TUJR, W942, or WF4
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
Tenney Junior
The Tenney Junior Family
Model No. TJR,
Chamber Type: Temperature
Controller: Watlow 942
CHAMBER OPTIONS
TempGard IV - Watlow 93
Boost Heat - Watlow 147
LN2 Boost Cooling
CO2 Boost Cooling
Dry Air Purge
TPS - Thermal Product Solutions
2121 Reach Road
Williamsport, PA 17701
570-326-1770 Fax: 570-326-7304
TENNEY ENVIRONMENTAL
Serial No. 3xxxx
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GN2 Purge
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Data Communications
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LinkTenn32 Software
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Chart Recorder
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Alternate Controller - Watlow F4
Rev. 04/30/04
Page 1
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Table of Contents
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Summarization of Contents
SAFETY WARNINGS & SYMBOLS
INTERNATIONAL WARNING / SAFETY SYMBOL DEFINITIONS
Explains the meaning of international warning and safety symbols used in the manual.
INSTALLATION INSTRUCTIONS
Delivery and Uncrating of Unit
Details the process of inspecting and uncrating the chamber upon receipt.
Location and Installation of Unit
Specifies requirements for chamber placement, ventilation, and leveling.
Air Supply Connection
Explains the compressed air supply connection for the Dry Air Purge System.
GN2 Connection
Details the gaseous nitrogen supply connection for the GN2 Purge System.
LN2 Connection
Describes the liquid nitrogen supply connection for the LN2 Boost Cooling option.
CO2 Connection
Outlines the liquid carbon dioxide supply connection for the CO2 Boost Cooling option.
Electrical Specifications
Lists the electrical requirements including voltage, frequency, and current.
Power Connection
Provides crucial instructions for safely connecting the chamber to the power supply.
Application of Power
Covers pre-energization checks, motor rotation verification, and initial startup.
Operating With an Active Heat Load
Explains how to operate the chamber when an internal heat load is present.
TEMPERATURE CONTROL
Controller Features
Describes the features of the Watlow 942 and Watlow F4S controllers.
Watlow 942 Control Functions
Details the operational functions and logic of the Watlow 942 controller.
Watlow F4 Control Functions
Explains the control functions of the alternate Watlow F4 controller.
CHAMBER OVERTEMPERATURE PROTECTION
Overview
Introduces the thermal cutoff device for overtemperature protection.
Thermal Cutoff Replacement Procedure
Step-by-step guide on how to replace the thermal cutoff device.
ALARM and SHUTDOWN CIRCUIT - TempGard IV (Optional)
System Description
Explains the optional TempGard IV feature for product over/under temperature protection.
Special Hookup of TempGard IV for Model TJR ONLY
Details the specific wiring and connection procedure for the TempGard IV on Model TJR.
Circuit Operation
Describes how the alarm and shutdown circuit functions during normal and alarm conditions.
TempGard IV Alarm Setpoint Entry
Guides the user on setting low and high temperature alarm setpoints for the TempGard IV.
PREVENTATIVE MAINTENANCE
General Maintenance
Covers routine checks for cleanliness, seals, and general component condition.
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