Krohn-Hite 526 User manual

Model 526
Precision DC Source/Calibrator
±100nV to ±111V
±10nA to ±111mA
Operating Manual

Service and Warranty
Krohn-Hite Instruments are designed and manufactured in accordance with sound engineering practices and
should give long trouble-free service under normal operating conditions. If your instrument fails to provide
satisfactory service and you are unable to locate the source of trouble, contact our Service Department at (508)
580-1660, giving all the information available concerning the failure.
DO NOT return the instrument without our written or verbal authorization to do so. After contacting us, we
will issue a Return Authorization Number which should be referenced on the packing slip and purchase order.
In most cases, we will be able to supply you with the information necessary to repair the instrument, avoiding
any transportation problems and costs. When it becomes necessary to return the instrument to the factory,
kindly pack it carefully and ship it to us prepaid.
All Krohn-Hite products are warranted against defective materials and workmanship. This warranty applies
for a period of one year from the date of delivery to the Original Purchaser. Any instrument that is found
within the one year warranty period not to meet these standards, will be repaired or replaced. This warranty
does not apply to fuses or batteries. No other warranty is expressed or implied.
Krohn-Hite Corporation reserves the right to make design changes at any time without incurring any
obligation to incorporate these changes in instruments previously purchased.
Modifications to this instrument must not be made without the written consent of an authorized employee of
Krohn-Hite Corporation.

Model 526
Precision DC Source/Calibrator
Operating Manual
Copyright 2013. All rights reserved. Contents of this publication may not be reproduced in any form without
the written permission of Krohn-Hite Corporation.
Revision 3.2, Published 6/13, Printed in U.S.A.
15 Jonathan Drive, Unit 4, Brockton, MA 02301-5566
Tel: [phone]; Fax: [phone]
[e-mail]; www.krohn-hite.com

526 Table of Contents
SECTION 1.0 GENERAL DESCRIPTION AND SPECIFICATIONS ..............1-1
1.1 Introduction ....................................1-1
1.2 Specifications ...................................1-2
1.2.1 Voltage Mode Specifications ......................1-2
1.2.2 Current Mode Specifications ......................1-3
1.2.3 GPIB Programming ..........................1-3
1.2.4 Terminals ................................1-4
1.2.5 Modes Of Operation ..........................1-4
1.2.6 Special Features ............................1-4
1.2.7 General Specifications .........................1-4
1.2.8 Safety..................................1-5
1.2.9 Electromagnetic Compatibility .....................1-5
1.2.10 Mechanical Specifications .......................1-5
1.2.11 General Information ..........................1-5
1.2.12 Accessories ..............................1-5
1.2.13 Options .................................1-5
1.2.14 Optional Accessories..........................1-5
SECTION 2.0 OPERATION ...................................2-1
2.1 Introduction ....................................2-1
2.2 Selecting Line Voltage ..............................2-1
2.3 Placement and Rack Mounting..........................2-3
2.4 Quick Start.....................................2-3
2.4.1 526 Tones ...............................2-3
2.4.2 LOCAL Key...............................2-4
2.4.3 SELECTOR Knob ...........................2-4
2.4.4 Setting a Voltage/Current .......................2-4
2.4.4.1 Decade Controls .......................2-4
2.4.5 Selecting a Range ...........................2-4
2.4.6 Recalling Memory Set-Ups.......................2-5
2.4.7 Saving Set-Ups into Memory......................2-5
2.4.8 Front Panel Output Terminals .....................2-6
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2.4.8.1 HV Led ............................2-6
2.4.8.2 Wire Connections .......................2-6
2.4.9 Rear Panel Connectors ........................2-7
2.4.9.1 IEEE-488 Connector .....................2-7
2.4.9.2 Optional LAN Connector (Option: LAN) ............2-7
2.4.9.3 Power Entry Module .....................2-7
2.4.9.4 Rear Panel Output Connector and Mating Connector.....2-8
2.4.9.5 Chassis Ground/Safety Ground................2-8
2.5 Front Panel Controls ...............................2-8
2.5.1 Membrane Keys ............................2-8
2.5.1.1 [ENTER/STORE] Key.....................2-8
2.5.1.2 [RECALL] Key ........................2-9
2.5.1.3 [EDIT] Key ..........................2-9
2.5.1.4 [LOCAL] Key .........................2-9
2.5.1.5 [+/-] POLARITY Key .....................2-10
2.5.1.6 [DOWN] and [UP] RANGE Keys ...............2-10
2.5.1.7 [VOLTS/MILLI AMP] Key ..................2-10
2.5.1.8 [CROWBAR] Key ......................2-11
2.5.1.9 [2W SENSE 4W] Key ....................2-11
2.5.1.10 [UPDATE OUTPUT] Key ..................2-11
2.5.1.11 [MENU] Key .........................2-11
2.6 Display Information ...............................2-12
2.6.1 Mode .................................2-12
2.6.2 Memory ................................2-13
2.6.3 Comm .................................2-13
2.6.4 Output Limits (V-mA) .........................2-13
2.6.5 Compliance Limits (VOLTS) .....................2-13
2.6.6 Sense Wires .............................2-14
2.6.7 Output Settings ............................2-14
2.6.8 Output .................................2-14
2.7 Menu and Selector Knob Control........................2-14
2.7.1 Menu 1 - View Set-Up ........................2-15
2.7.1.1 Port Setting View ......................2-15
2.7.1.2 Voltage Limits View .....................2-16
2.7.1.3 Current Limit View ......................2-16
2.7.1.4 Compliance Voltage View ..................2-16
2.7.1.5 Power On Sequence View ..................2-16
2.7.1.6 Full or Partial Display View..................2-17
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2.7.1.7 Pass Thru Zero View ....................2-17
2.7.1.8 Remote Protocol View ....................2-17
2.7.1.9 Exiting To Main Level ....................2-18
2.7.1.10 Exiting Menu and Returning To Local Operation.......2-18
2.7.2 Menu 2 - Port Selection........................2-18
2.7.2.1 IEEE-488 (GPIB) ......................2-19
2.7.2.2 LAN (Optional)........................2-20
2.7.3 Menu3-VOutput Limit........................2-20
2.7.4 Menu 4 I Output Limit ........................2-22
2.7.5 Menu 5 V Compliance Limit (Fail Safe)...............2-23
2.7.5.1 Changing V Compliance Limit ................2-23
2.7.6 Menu 6 - Power-On Set-Up......................2-24
2.7.6.1 Changing Power-On Set-Up Setting.............2-25
2.7.7 Menu 7 - Display Area........................2-26
2.7.7.1 Changing Display Area Setting ...............2-26
2.7.8 Menu 8 - Pass Thru Zero ......................2-27
2.7.8.1 Changing Pass Thru Zero Setting:..............2-27
2.7.9 Menu 9 - CLR User Memory ....................2-28
2.7.9.1 Clearing User Memory....................2-28
2.7.10 Menu 10 - Remote Protocol .....................2-28
2.7.11 Changing Remote Protocol Setting ..................2-29
2.8 Overloading ...................................2-29
SECTION 3.0 526 (STD) GPIB PROGRAMMING .......................3-1
3.1 Introduction ....................................3-1
3.2 Krohn-Hite (Std) Programming Protocols....................3-1
3.3 IEEE-488 (GPIB) Programming..........................3-2
3.3.1 Interface Capabilities ..........................3-2
3.3.2 Setting The Instrument’s Address ...................3-2
3.3.3 Interface Messages ..........................3-2
3.3.3.1 “MLA” - My Listen Address. ..................3-2
3.3.3.2 “MTA” - My Talk Address ...................3-2
3.3.3.3 “UNL” Unlisten ........................3-2
3.3.3.4 “IFC” Interface Clear .....................3-2
3.3.3.5 “Power-On” Clear .......................3-2
3.3.4 Group Commands ...........................3-3
3.3.5 Output Data Byte String Format ....................3-4
3.3.5.1 Examples of Data Strings/Output Results...........3-5
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3.3.6 Talk Enable Modes...........................3-5
3.3.7 C or c (Compliance Limit) .......................3-5
3.3.8 *RST or *rst (Power-Up Reset) ....................3-5
3.3.9 S or s (Status) .............................3-5
3.3.10 M or m (Set Memory)..........................3-8
3.3.11 L or l (Output Limit)...........................3-8
3.3.12 *IDN? or *idn? .............................3-8
3.3.13 ? (What's Wrong Query) ........................3-8
3.3.14 "What’s Wrong" Request ........................3-8
3.3.15 Programming Examples ........................3-9
SECTION 4.0 MODEL 522 GPIB PROGRAMMING ......................4-1
4.1 Introduction ....................................4-1
4.2 IEEE-488 Programming Protocol ........................4-1
4.2.1 Interface Messages. ..........................4-2
4.2.2 Groups of Commands .........................4-2
4.2.3 Talk Enable Modes...........................4-2
4.2.4 Responses ...............................4-3
4.2.5 Data Byte String Format.........................4-3
4.2.6 What’s wrong request, ("?") ......................4-4
4.2.7 Programming ..............................4-4
4.2.8 IEEE-488 Addressing .........................4-5
SECTION 5.0 MODEL 8200 GPIB PROGRAMMING .....................5-1
5.1 Analogic/Data Precision Protocol ........................5-1
5.1.1 8200 Protocol Programming Examples ................5-2
5.1.2 Address Setting ............................5-3
5.1.3 2-Wire/4-Wire Operation ........................5-3
SECTION 6.0 LAN (LOCAL AREA NETWORK) OPERATION ................6-1
6.1 Introduction ....................................6-1
6.2 Local Area Networks ...............................6-1
6.2.1 Site LANs and Private LANs ......................6-1
6.2.2 Connecting Through a Network ....................6-1
6.2.3 Connecting Directly to the Model 526 (no network) ..........6-1
6.2.4 How to Find the Current IP Address:..................6-1
6.2.5 Setting a Fixed IP Address.......................6-3
6.2.6 LAN and HyperTerminal Setup ....................6-6
6.2.6.1 How to Set-Up and Run WindowsÒHyperTerminal .....6-6
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SECTION 7.0 INCOMING ACCEPTANCE ...........................7-1
7.1 Introduction ....................................7-1
7.2 Warm-Up Time...................................7-1
7.3 Required Test Equipment ............................7-1
7.4 Preliminary Set-Up ................................7-1
7.5 Verification Procedure ..............................7-2
7.5.1 Output Voltage Checks.........................7-2
7.5.2 Output Current Checks (using PCR100 Precision Resistor)......7-3
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