PowerPac™ HC Power Supply Instruction Manual Catalog Number 164-5052
Table of Contents Page Safety ...........................................................................................i Section 1 Introduction ......................................................................................1 1.1 1.2 Overview.................................................................................................1 Unpacking...............................................................................................2 Section 2 Control Features...........................
Safety Caution/Warning ! ! PowerPac power supplies use high output voltages that are electrically isolated from earth ground through a protective impedance to minimize the risk of electrical shock to the user. The following guidelines should be observed and followed when using a PowerPac power supply. ! PowerPac power supplies have passed test for operation at temperatures between 0° and 40°C, with relative humidity between 0 and 95% non-condensing.
Section 1 Introduction 1.1 Overview The PowerPac HC power supply is designed to provide constant voltage, current or power for electrophoresis applications. The power supply operates at the value specified for the constant parameter, with limits for the other parameters. To prevent damage to the electrophoresis cell, the PowerPac HC provides automatic crossover to constant current, constant voltage, or constant power, depending on which set limit is first reached.
The PowerPac HC power supply has the following features: • • • • • • • • • • • Programmable constant voltage, constant current or constant power operation with automatic crossover. LCD screen displays all running parameters at once. Timer control to 99 hr, 59 min. Programmable methods with up to 3 steps. Pause mode for editing run parameters. Safety Features include automatic detection of no-load, short circuit, rapid resistance change, ground leak, fan failure and system overheating.
Section 2 Control Features RUN/PAUSE KEY ALPHANUMERIC KEYPAD STOP/HOME KEY CLEAR ENTRY KEY SETUP KEY IR PORT SOFT KEYS EDIT KEY ARROW KEYS Fig. 4. Front Panel. Key Description Run/Pause Key • Starts or pauses a run. Pausing allows editing of the run parameter values. • The corresponding LED indicates the status of the power supply. Stop Key • Stops the run. The display will show final run values alternating with the "Run Stopped" screen.
Section 3 Setup and Operation 3.1 Setup and Programming a Run This section guides the user through setting up the power supply for a run, connecting the electrophoresis cell(s), programming, and running. STEP PROCEDURE DESCRIPTION 1. Connect cell(s) The power leads are color coordinated to the output terminals. indicates high voltages. Note: Power leads must be inserted perpendicular to the curve of the case. Fig. 5. Power Leads Connected Correctly. Fig. 6. Power Leads Connected Incorrectly. 2.
4. Enter constant value Press the Values keys to increase or decrease the selected value. The keys change the value in increments of 1, however after a few seconds of holding the key in either direction, +/-, the value changes in increments of 10. If the run is going to be untimed or continuous, and the limits are the maximum output, proceed to step # 9. 5. Program time (optional) Move the cursor to the time field using the left/right arrow keys and enter the values as in step 4.
STEP PROCEDURE DESCRIPTION 2. Editing Use the cursor keys and values keys to change parameters. For multiple-step runs, future steps may be accessed and changed, yet the original number of steps cannot be changed. 3. Resume the run Resume the run by pressing the start/pause key again. 3.3 Ending a Run A run may be terminated in several ways: by user intervention, automatically if time was programmed, or due to a power failure (if power failure detection (PFd) is not enabled).
Rapid Resistance Change Detection (RRCd) The Rapid Resistance Change Detection safety feature alerts the user when the resistance load detected by the PowerPac HC has changed by more than 25% over a brief time-period, possibly indicating an unsafe condition. Certain applications, such as use with the DCode or DGene systems, might exhibit resistance changes ³ 25% and trigger a shutdown erroneously before completion of the run if RRCd is not turned off. For these applications, RDCd should be turned off.
Section 4 Maintenance and Troubleshooting 4.1 Maintenance The PowerPac HC requires little maintenance to assure reliable operation. To clean the case, first unplug the power supply. Use a damp cloth to wipe down the outer case. Ethanol may be used to wipe the case, however, prolonged contact or use may cloud the green translucent case. 4.2 Troubleshooting 4.2.1 Basic Troubleshooting Problem Cause Solution No display/lights/fan 1. No AC power. 1.
If a power failure occurs during a run, there are several possible scenarios which are described as follows: Message Displayed Explanation RUN ABORTED AFTER POWER FAIL PFd was OFF. The run, either timed or continuous, was aborted after a power failure occurred. After pressing the stop key to reset, the original run parameters are no longer available. *PRESS STOP KEY TO RESET RUN STOPPED AFTER POWER FAIL PFd was ON when a power failure occurred and the run was resumed automatically.
Problem Cause Solution E09 RESISTANCE Change in load CHANGE DETECTED resistance detected. The PowerPac HC CELL & CABLES detects drastic changes * PRESS STOP KEY in resistance which may indicate failure of the cell's power leads or a loose output connection. • Loose ouput connections leading to intermittent connection to the loads. • Cells added or removed during the run. Note: Certain applications exhibit intrinsic fluctuations in resistance that can trigger the Resistance Change error message.
4.2.4 Bio-Rad Serviceable Error Messages Error code Cause Solution ERROR 03 * POWER OFF/ON Output regulation problem ERROR 08 * POWER OFF/ON ERROR 99 * POWER OFF/ON ERROR 98 * POWER OFF/ON Output regulation problem Hardware failure Restart the unit by turning the power switch OFF and ON. Contact Bio-Rad Technical Resources if problem persists. Hardware failure 4.
Appendix A Specifications Output specifications Output range (programmable) 250 V, 3.0 A, 300 W 5–250 V, fully adjustable in 1 V increments 0.01–3.0 A, fully adjustable in 0.
Appendix B Warranty and Ordering Information Warranty The PowerPac HC power supply is covered by a standard Bio-Rad Laboratories warranty. Contact your local Bio-Rad representative for details of the warranty. If any defects should occur during this warranty period, Bio-Rad Laboratories will replace the defective parts without charge. However, the following defects are specifically excluded: 1. Defects caused by improper operation. 2.
Bio-Rad Laboratories, Inc. Web site www.bio-rad.
