BK Precision 1900B User Manual

Model 1900B, 1901B, 1902B
Switching DC Power Supply
INSTRUCTION MANUAL
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

BK Precision 1900B Specifications

General

Model	1900B
Output Voltage	0-30 V
Output Current	0-5 A
Power Rating	150 W
Voltage Resolution	10 mV
Current Resolution	1 mA
Ripple & Noise	1 mVrms
Load Regulation (CV)	0.01 % + 3 mV
Line Regulation (CV)	0.01 % + 3 mV
Input Voltage	100-240VAC, 50/60Hz
Ripple & Noise (CC)	≤3mArms
Operating Temperature	0°C to 40°C
Storage Temperature	-20°C to 70°C

Summary

Safety Summary

General Safety Precautions

Covers essential safety guidelines for operating, servicing, and modifying the instrument.

Warnings, Cautions, and Compliance

Safety Symbols and Declarations

Defines warning types, explains safety symbols, and details compliance statements.

Introduction to BK Precision 1900B Series

Product Overview and Key Features

Introduces the 1900B Series power supplies, highlighting key features and applications.

Controls and Indicators

Front Panel Layout

Details the front panel components, including displays, control knobs, and auxiliary output.

Rear Panel Layout

Describes the rear panel connections, mode selection, and ports.

Operating Instructions

Initial Setup and Safety Precautions

Covers safety precautions and model selection for operating the power supply.

Power Supply Connection and Self-Test

Guides on connecting the unit, performing the self-test sequence, and initial checks.

Using Control Knobs

Explains how to use rotary encoder knobs for coarse and fine tuning of output settings.

Zeroing Current Meter Offset

Provides steps for manually resetting the current meter to zero during operation.

Main and Auxiliary Output Usage

Details how to use both main and auxiliary outputs concurrently for combined current delivery.

Overview of Control Modes

Introduces the four distinct control modes: Normal, Preset, Remote Control, and Set.

Normal and Preset Mode Operation

Explains Normal mode operation and how to use the Preset mode for stored settings.

Set Mode and Analog Remote Control

Details setting custom presets and using Analog Remote Control mode.

Remote Sense Operation and Connection

Covers the Remote Sense feature and its connection procedure for Model 1900B.

Remote Sense Disconnection

Provides the correct procedure for disconnecting remote sense to prevent equipment damage.

Remote Control Methods

Overview of Remote Control Techniques

Introduces two methods for remotely controlling voltage and current settings.

Analog Remote Control Connector Setup

Guides on preparing the remote control connector plug and pin numbering.

Remote Control Pin Assignment Details

Details the pin assignment for the remote control connector for external sources.

Using External DC Voltage Sources for Control

Explains how to use external DC voltage sources for voltage and current adjustment.

Voltage Source Connection Procedures

Provides specific connection steps and warnings for external voltage sources.

Using 5 kΩ Variable Resistors for Control

Guides on using two 5 kΩ variable resistors for voltage and current control.

Remote Output Enable and Disable

Describes how to remotely enable or disable the output using pin 5.

PC Interface Control via USB

Explains PC control via USB, software, and manual download locations.

Faults and Troubleshooting

Overvoltage Protection (OVP)

Explains OVP, its trigger conditions, and how to reset the warning.

Overtemperature Protection (OTP)

Describes OTP, its indication, and troubleshooting steps including fan check.

Overload Protection (OLP)

Explains OLP, its function in CC mode, and how to respond to the warning.

Voltage and Current Limit Settings (UVL/UCL)

Describes UVL/UCL for preventing accidental output changes, set via PC.

Fuse Replacement Procedure

Guides on identifying blown fuses, locating them, and replacing them with correct ratings.

Product Specifications

Output, Regulation, and Noise Specs

Details output voltage, current, regulation, and ripple/noise parameters.

Efficiency, Features, and Environmental Specs

Covers efficiency, features, protections, operating temps, dimensions, and accessories.

Certification and Compliance

CE Declaration of Conformity

States compliance with Low Voltage and Electromagnetic Compatibility Directives.