BK Precision 1687B User Manual

Model 1685B, 1687B, 1688B
Switching DC Power Supply
INSTRUCTION MANUAL

BK Precision 1687B Specifications

General

Output Current	0 - 5 A
Line Regulation	≤ 0.01 % + 3 mV
Load Regulation	≤ 0.01 % + 3 mV
Ripple and Noise	≤ 1 mV RMS
Display Type	LED
Voltage Resolution	10 mV
Current Resolution	1 mA
Input Voltage	100 - 240 VAC, 50/60 Hz
Ripple and Noise (CC)	< 3 mArms
Load Regulation (CC)	≤0.01 % + 3 mA
Line Regulation (CC)	≤0.01 % + 3 mA
Operating Temperature	0°C to 40°C
Storage Temperature	-20°C to 70°C
Dimensions	215 x 145 x 280 mm

Summary

Safety Summary

Grounding and Safe Operation

Essential safety precautions for instrument grounding and operation.

Hazardous Environment Operation

Warnings against operating in explosive atmospheres.

Internal Component Safety

Precautions regarding live circuits and servicing.

Instrument Modification and Repair Policy

Guidelines on instrument modification and repair procedures.

Manual Warnings and Safety Symbols

Explains warnings, cautions, and safety symbols used in the manual.

Product Certification Statement

Statement of product compliance with specifications.

Introduction to BK Precision Power Supplies

Key Features of 1685B Series

Highlights the main features of the 1685B Series power supplies.

Controls and Indicators Overview

Front Panel Controls and Displays

Details the controls and indicators on the front panel.

Rear Panel Connections and Switches

Details the controls and indicators on the rear panel.

Operating Instructions and Safety

General Operating Safety Precautions

Essential safety precautions for operating the power supply.

Power Supply Operation Guide

Connecting the Power Supply

Step-by-step instructions for connecting the power supply.

Power-On Self Test Procedure

Describes the power-on self-test procedure and display indicators.

Control Knob Functionality

Explains the functionality of coarse/fine tuning rotary encoder knobs.

Using Main and Auxiliary Outputs Together

How to use both main and auxiliary output terminals simultaneously.

Power Supply Control Modes

Normal Mode Operation Guide

Description of the default operating mode and knob control.

Preset Mode Functionality and Use

How to use the preset modes for quick recall of settings.

Set Mode for Custom Presets

Procedure for defining custom voltage and current presets.

Resetting to Factory Default Settings

Steps to restore the unit to its original factory configuration.

Analog Remote Control Mode Setup

Using the remote control connector for output adjustment.

Remote Control Operations

Analog Remote Control Connector Setup

Guide on preparing and connecting the remote control connector.

Analog Remote Control Methods

Using External DC Voltage Sources for Control

Connecting external voltage sources for remote control.

Using 5 kΩ Variable Resistors for Control

Setup for using variable resistors for remote control.

Remote Output Enable and Disable

How to use pin 5 for remote output on/off control.

PC Interface Control Features

PC Software Interface Overview

Overview of the PC software interface and display elements.

Configuring External Timed Programs

Procedure for creating and running timed programs via PC.

Managing Internal Preset Memory via PC

Remotely defining and managing voltage/current presets.

Using the Data Log Window

How to view and manage output data using the data log feature.

Data Logging Time Frame Concepts

Explanation of Time Minimum and Time Length for data logging.

PC Software Settings Configuration

Configuring data log sampling, voltage, and current limits.

Remote Control Command Set

Basic Remote Commands: Voltage, Current, Presets

Details commands for setting voltage, current, and presets.

Remote Commands: Status and Preset Retrieval

Commands to retrieve display readings and preset memory values.

Remote Commands: Output and Limit Control

Commands for output on/off, setting voltage/current limits.

Remote Commands: Current Limits and Max Values

Commands to retrieve current limits and maximum voltage/current.

Troubleshooting Power Supply Faults

Overvoltage Protection (OVP) Handling

Explanation and reset procedure for OVP.

Overtemperature Protection (OTP) Handling

Explanation and troubleshooting for OTP.

Overload Protection (OLP) Handling

Explanation and reset procedure for OLP.

Fuse Replacement Guide and Table

Instructions for replacing blown fuses with correct ratings.

Technical Specifications Overview

Output Voltage and Current Specifications

Technical specifications for output voltage, current, and regulation.

Ripple, Noise, and Meter Accuracy Specs

Specifications for ripple, noise, and meter accuracy.

General, Environmental, and Physical Specs

Specifications for input, efficiency, dimensions, operating conditions.

Product Certification and Compliance

CE Compliance Declarations and Standards

Statements of compliance with Low Voltage and EMC Directives.

Service and Support Information

Warranty and Non-Warranty Service Procedures

Procedures for obtaining warranty and non-warranty repair services.

Limited Two-Year Product Warranty

Warranty Terms, Registration, and Exclusions

Details of the two-year warranty, registration, and exclusions.