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Precision 280 Series - User Manual

Precision 280 Series
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Precision
170 Marcel Drive
Winchester, VA
USA
Phone: 540-869-8623
Toll Free: 800-621-8820
FAX: 540-869-8626
Manual P/N 36100112 (340016400)
Rev D Dated 08NOV01
280, 281, 282, 283, 284, 285, 286 & 288
Installation and Operation Manual
Microprocessor-Controlled
General Purpose Water Baths
280 Series
Models
Press or until desired temperature is displayed.
Press ENTER - New Set Point is accepted.
Display will then return to actual temperature.
Should Calibration Be Required:
Place certified / traceable thermometer into holder.
Press or to match readout to thermometer.
Press ENTER - calibration is complete.
Off
On
Heater On
Calibrate
ENTER
q
To Set Temperature:
q
Allow to stabilize.
Press Calibrate button.
p
p
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Precision 280 Series Specifications

General IconGeneral
TypePrecision Balance
DisplayLCD
Pan Size90mm
Power SupplyAC adapter
InterfaceRS232
Unitsg, kg, oz, lb, ct

Summary

Introduction and Safety

User Satisfaction and Safety

Importance of user satisfaction and understanding the unit for safety objectives.

User Responsibility and Training

User's duty to understand operation, train operators, and follow warnings.

Product Intended Use

Specifies the product is not for sterile/patient use or hazardous locations.

Unpacking and Damage Claims

Product Packing and Inspection

Details factory packing, inspection, and saving material if damage is found.

Transit Damage Claim Procedures

Outlines steps for filing claims for visible and concealed transit damage with the carrier.

Precision Support for Claims

Precision's commitment to support claims if specified procedures are followed.

General Product Information

Application and Uniformity

Highlights Precision Baths' use in research and quality control for tests requiring uniformity.

Microprocessor Control Panel

Describes the control panel's role in operation, adjustment, and calibration.

PID Control and Gable Cover

Explains PID temperature control and the importance of the gable cover for optimal sensitivity.

High Limit Temperature Cutout

Details the automatic cutout triggered by high temperatures and reset procedure.

Construction and Materials

Describes the interior (stainless steel) and exterior (galvanized steel) construction.

Performance Data and Installation

Performance Specifications

Presents key performance specifications like uniformity and sensitivity at 37°C.

Installation Site Requirements

Instructs on bath placement on a level surface away from ambient changes.

Shelf and Leg Extension Setup

Details installing the shelf and using leg extensions for height adjustment.

Electrical Connection Safety

Emphasizes proper grounding, use of three-prong plugs, and avoiding adapters.

Circuit Loading Considerations

Advises on determining total current draw for the circuit to avoid overload.

Controls and Operation

Power Switch and Control Panel

Explains the power switch and the main control panel's components.

LED Display Functionality

Explains the three-digit display for actual, set, and calibrated temperature values.

Heater On Lamp Indicator

Describes the indicator light that shows when the heater is active.

Calibrate Key Operation

Explains how the calibrate key enters calibration mode for temperature matching.

Temperature Selection and Enter Keys

Describes keys for adjusting setpoints and confirming values.

Bath Operation Procedures

Bath Filling and Liquid Level

Advises on filling the bath, displacement, and maximum liquid level.

Energy Conservation with Gable Cover

Recommends using the gable cover for energy conservation and accuracy.

Unit Power-Up Sequence

Describes the sequence of display lights and temperature readings upon powering on.

Viewing Temperature Setpoint

Explains how to temporarily view the set temperature using specific keys.

Changing Temperature Setpoint

Details the process of adjusting and confirming a new temperature setpoint.

Water Bath Calibration

Provides step-by-step instructions for calibrating the bath to a thermometer reading.

Maintenance and Cleaning

Stainless Steel Care and Cleaning

Advises on general cleaning, dealing with algae, and avoiding harsh chemicals.

Chemical Compatibility and Usage

Lists acceptable and unacceptable chemicals for use in or near the bath.

Rust Removal Procedure

Outlines steps for removing iron rust using acid solutions and safety precautions.

Condensation Management

Advises on handling condensation from the gable cover during operation.

Troubleshooting Guide

Troubleshooting Procedures Reference

Directs users to a table for basic repair information.

Recommended Troubleshooting Tools

Lists tools and instruments needed for troubleshooting procedures.

Diagnosing No Heat Issues

Provides steps to diagnose and resolve issues when the unit does not heat.

Diagnosing Unstable Temperature

Provides steps to diagnose and resolve issues with inconsistent temperature control.

Diagnosing Too Much Heat

Suggests checks for the unit overheating or displaying excessive heat.

Diagnosing No Display

Outlines steps to diagnose and resolve issues where the display shows no output.

Checking TRIAC Functionality

Details checking the TRIAC output voltage for heater operation.

Parts Replacement

Pre-Replacement Verification

Advises verifying the faulty part using the troubleshooting guide before replacement.

Parts Replacement Procedures

Refers to a table for specific replacement procedures and consequences of failure.

Replacing Temperature Sensor

Provides step-by-step instructions for replacing the temperature sensor.

Replacing the Heater

Details the procedure for removing and replacing the unit's heater element.

Replacing Control Board

Outlines the steps to replace the main control board.

Replacing Diffuser Pan Leg Extension

Describes how to attach extension legs to the diffuser pan.

Assembly and Schematic Drawings

Typical Front View Diagram

Illustrates the front panel layout with labeled components and controls.

Typical Rear View Diagram

Shows a cross-section of the unit from the rear, highlighting insulation and cord.

Typical Bottom View Diagram

Displays the bottom view, showing internal components like the heater and PCB.

120 VAC Wiring Diagram

Illustrates the electrical connections for 120 VAC operation.

230 VAC Wiring Diagram

Shows the electrical connections specific to 230 VAC operation.

Warranty Information

Warranty Period and Conditions

States the one-year warranty for defects and usage conditions.

Precisions Obligation and Returns

Defines Precision's obligation for repair/replacement and notes on part replacement.

Disclaimer of Express Warranties

Explicitly disclaims warranties of merchantability, fitness, and liability for consequential damages.

Unauthorized Modifications Clause

States Precision is not responsible for issues arising from unauthorized repairs or modifications.

Oral Representations Not Warranties

Clarifies that oral advice is not a warranty and should not be relied upon.

Defective Component Replacement

Details replacement of defective components within one year, including labor for factory returns.

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