1030A Manual - Krohn-Hite

1030A Manual - Krohn-Hite
Model 1030A
1000V DC Voltage Standard/Calibrator
Operating Manual
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Model 1030
OPERATORS
MANUAL
Serial No.______________
Manuals\1030.wpd
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Model 1030
OPERATORS
MANUAL
Copyright © 1998
Krohn-Hite Corporation
15 Jonathan Drive Unit 4
Brockton, Massachusetts 02301
E-mail: Info@krohn-hite.com
www.krohn-hite.com
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any
form by any means, electronic, mechanical photocopying, recording, or otherwise, without the prior written
permission of Krohn-Hite Corporation .
Printed in U.S.A.
Version 2.20
Revised October 2000
Information furnished in this manual is believed to be accurate and reliable. However, no responsibility is assumed
by Krohn-Hite Corporation for its use; nor for any infringements of patents or other rights of third parties which
may result from its use.
Manuals\1030.wpd
TABLE OF CONTENTS
SECTION
TITLE
i
ii
iii
iv
List of Drawings
Limited Warranty
Factory Service Request and Authorization
Packing Suggestions
I
DESCRIPTION AND SPECIFICATIONS
1.1.0
1.2.0
1.3.0
General Description
Applications
Specifications
II
INSTALLATION
2.1.0
2.2.0
Mounting
AC Power Input Considerations
III
OPERATION OF INSTRUMENT
3.1.0
3.2.0
Front Panel Controls
Operation of the Voltage Source
IV
THEORY OF OPERATION
4.1.0
4.2.0
4.3.0
4.4.0
4.5.0
4.6.0
4.7.0
Introduction
Power Supply
Internal Precision Reference
Chopper Stabilized Amplifier
Feedback
Output selector
Overload circuitry
V
MAINTENANCE
5.1.0
5.2.0
5.3.0
5.4.0
Introduction
Disassembly Procedures
Preventive Maintenance
Trouble Shooting
VI
CALIBRATION PROCEDURE
6.1.0
6.2.0
6.3.0
6.4.0
General Information
Required Equipment
Calibration Procedure for 1030
Noise Measurements
VII
REPLACEMENT PARTS
7.1.0
Recommended Spare Parts List
?
NOTE:Errata and addendum (if any) will appear in the back of this manual.
Manuals\1030.wpd
SCHEMATICS AND LAYOUTS
Schematic, Power Supply
B-3324D
Schematic, Main Board
B-3325K
Layout, 1030 Main Board
B-4879A
Layout, 1030 High Voltage Board
B-4880A
Layout, Calibration Adjustments
B-4881A
Reference Drawing
930727A
i
Manuals\1030.wpd
WARRANTY
The Krohn-Hite Corporation (K-H) warrants to the original purchaser each instrument
manufactured by them to be free from defects in material and workmanship. This warranty is
limited to servicing, repairing and/or replacing any instrument or part thereof returned to the K-H
factory for that purpose in accordance with the instructions set forth below; and furthermore to
repair or replace all materials, except tubes, fuses, transistors and other semiconductor devices
which shall within one year of shipment to the original purchaser be returned to the K-H factory
and upon examination be deemed defective.
K-H instruments may not be returned to the factory under the terms of this warranty
without the prior authorization of the K-H Service Department. All instruments returned to K-H
for service hereunder should be carefully packed and shipped. All transportation charges shall be
paid by the purchaser.
K-H reserves the right to discontinue instruments without notice and to make changes to
any instrument at any time without incurring any obligation to so modify instruments previously
sold.
This warranty is expressly in lieu of all other obligations or liabilities on the part of K-H.
No other person or persons is authorized to assume in the behalf of K-H any liability in the
connection with the sale of its instruments.
CAUTION: The instrument you have purchased is a precision instrument
manufactured under exacting standards. Any attempts to repair, modify or
otherwise tamper with the instrument by anyone other than an K-H employee or
authorized representative may result in this warranty becoming void.
ii
Manuals\1030.wpd
FACTORY SERVICE REQUEST
AND
AUTHORIZATION
WARRANTY SERVICE
Instruments may be returned only on prior authorization. Please obtain a RETURN
AUTHORIZATION NUMBER either directly from the factory or from an authorized K-H
Representative. (See General Information below.)
CHARGEABLE REPAIRS
If requested, an estimate of charges will be submitted prior to repairs. We suggest that you
request a RETURN AUTHORIZATION NUMBER to facilitate handling.
GENERAL INFORMATION
A)
Please provide the following information in order to expedite the repair:
1)
Indicate MODEL
2)
Serial Number
3)
Complete description of the trouble:
Symptoms, measurements taken, equipment used, lash-up procedures, attempted
repairs, suspected location of failure and any other pertinent information.
B)
Freight Charges must be PREPAID.
C)
The RETURN AUTHORIZATION NUMBER should be noted on your documentation.
D)
See Packing Suggestions - next page.
iii
Manuals\1030.wpd
PACKING SUGGESTION
Although your K-H instrument is built for laboratory, production environment and some field
environment, it is NOT ruggedized. Therefore...
1.
Be sure the carton is STRONG enough to carry the weight of the instrument, e.g. use
double wall corrugation.
2.
Be sure the carton is LARGE enough to allow for sufficient packing material, e.g., at least
2 inches all around the instrument. The packing material should be able to be compressed
and then return to its approximate original volume.
3.
For better handling, the shipment should always be by AIR FREIGHT (expect for short
distances). You might use either UPS "blue label" or common air freight carrier, second
day air.
Please do not bounce it across the country in a truck. It may not hurt it, but it certainly is
not going to do a laboratory instrument much good.
4.
QUESTIONS? Just contact us. We will be pleased to help you.
iv
Manuals\1030.wpd
SECTION I
1.0.0. DESCRIPTION AND SPECIFICATIONS
1.1.0
General Description
1.1.1
The Model 1030A is a multi-range, high accuracy DC voltage source and calibrator.
1.1.2
The unit is laboratory calibrated against a primary measuring system, having an absolute
error of less than 10 ppm. The saturated standard cells used are certified, and are
traceable to the U. S. National Institute of Standards & Technology, having a long history
of documented stability.
1.1.3
Calibrator controls are obtained through front panel switches and decade switches.
No trims of adjustments required between calibration cycles. Adjustment settings are
made at final calibration and are fully described under calibration procedure.
1.1.4
The circuitry is completely solid state packaged in discrete, hybrid and integrated circuit
modules. These are proven circuits, using derated components to insure maximum
reliability. Major discrete circuits are packaged on etched glass epoxy boards, so that the
instrument can withstand abnormal environmental conditions. The instrument is also
overload and short circuit protected.
1.2.0
Applications
1.2.1
One of the major applications of the instrument as a DC calibrator is a system reference
for electronic analog computers, digital converters, strain gages, and other peripheral
equipment. Telemetry, data acquisition, control, and test facilities or electronic data
handling systems using analog voltage inputs, either throughout or in part, will find the
calibrator useful as a standard for systems calibration and checkout.
1.2.2
Other applications include the use of the instrument as a sophisticated ultra-stable power
supply providing an excellent source of bias current for operational amplifier and
networks, semiconductor parameter tests, as well as for other experimental and
breadboard circuitry.
1.2.3
Industrial checkout of power supplies, sensors, recorders, scopes as well as analog,
differential and digital voltmeters using the instrument as a DC voltage reference are
other primary application.
1.2.4
Colleges, universities and commercial research laboratories use the instrument in
their physics and chemistry laboratories as a constant voltage source in
calorimetric electrolytic and other applications.
1
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1.3.0
Specifications
1.3.1
LINE REGULATIONS:
+ 0.0005% for 10% line change
1.3.2
POWER REQUIREMENT:
115-230 Vac 50 - 400 Hz
Approximately 40 W
1.3.3
STABILITY:
1 hour
10 ppm
8 hours 20 ppm
1 month 40 ppm
6 months 50 ppm
1.3.4
TEMPERATURE:
Calibration Temperature
Ambient Operating Temp.
Operating Limit
Storage Temperature
23ºC ±1ºC
20ºC + 30ºC (68ºF to 86ºF)
-10ºC + 40ºC (14ºF to 104ºF)
-40ºC + 70ºC (-40ºF to 158ºF)
1.3.5
ISOLATION:
The output terminals may be floated 1000 Vdc and the primary isolation is 2000 Vac rms.
1.3.6
OUTPUT TERMINALS:
Floating output with case ground terminal.
1.3.7
REMOTE SENSING:
2 additional terminals are provided for sensing the IR drop across the connecting leads.
Local Sensing is attained by a front panel link that connects the bus between the "output"
and "remote" terminals.
1.3.8
POLARITY SWITCHING:
plus (+), zero (0), minus (-). The input and output terminals (floating) can be reversed
with respect to each other.
1.3.9
The zero (0) setting of the polarity switch short circuits the output and
open-circuits the input terminals. In effect this is a "standby" control as well as a
positive "zero".
2
Manuals\1030.wpd
1.3.10 ELECTRICAL SPECIFICATIONS
1.3.11 ACCURACY:
Line at nominal and with Sense at load or links closed at terminals.
1.3.12 CALIBRATION ACCURACY: 23ºC ±1ºC at 70% RH
1000 V range:
100 V range:
10 V range:
100 mV range:
±(0.002% of setting +0.0005% of range +5 µV)
±(0.002% of setting +0.0005% of range +5 µV)
±(0.002% of setting +0.0005% of range +5 µV)
±(0.005% of setting +3 µV)
*1.3.13 LIMIT OF ERROR ACCURACY:
±(0.003% of setting +0.001% or range +5 µV)
1.3.14 OUTPUT RANGES:
Resolution
Full Scale
1000 V
100 V
10 V
100 mV
100µV
10µV
1µV
0.01µV
1.3.15 OUTPUT CURRENT & IMPEDANCE:
Ranges
Output Impedances
1000 V @ 15 mA
100 V @ 50 mA
10 V @ 50 mA
100 mV n/a
30 milliohms
30 milliohms
30 milliohms
3 ohms
1.3.16 LOAD REGULATION:
±0.0005% +25µV
Not applicable on 100 mV range.
1.3.17 NOISE AND RIPPLE:
rms 0.8 Hz to 100 kHz Range
1000 V - 175 µV
100 V - 100 µV
10 V - 75 µV
100 mV - 10 µV
* 100 mV range limit of error accuracy: ±(0.005% of setting +5 µV)
3
Manuals\1030.wpd
1.3.18 General Specifications
1.3.19 TEMPERATURE COEFFICIENT:
Ambient
0.0002 % / ºC
Operating
0.001 % / ºC
1.3.20 PROTECTION:
Short-circuit and overload protection. Automatic recovery. Front panel indicator.
1.3.21 DIMENSIONS:
5 1/4 x 19 x 14 inches
133 x 483 x 355 mm
1.3.22 WEIGHT:
15 lbs. 7 kg
Shipping weight USA 19 lbs.
1.3.23 MOUNTING:
BENCH USE: Available with resilient feet, and folding tilt bale.
1.3.24 RACK MOUNTING: Supplied.
1.3.25 HUMIDITY:
0 to 70% relative humidity.
1.3.26 DOCUMENTATION:
1. Certificate of Compliance traceability to U.S. National Institute of Standards
and Technology.
2. Maintenance Manual including block diagrams, mechanical layout, schematics,
parts list.
3. WARRANTY: ONE YEAR including accuracy and stability.
4
Manuals\1030.wpd
SECTION II
2.0.0
INSTALLATION
2.1.0
Mounting
2.1.1
The instrument is available in rack version, designed for mounting in standard 19" racks.
It is completely enclosed in dust covers and therefore suitable for bench top use.
Resilient feet and a folding tilt bale are supplied.
2.1.2
The overall size is 5 1/4" high x 19" wide x 13" back of the panel. It weighs 22 pounds.
A standard 3 prong polarized plug and power cable is attached, and the unit is ready for
use.
2.1.3
POWER REQUIREMENT = 40 WATTS
LINE VOLTAGE RANGE: 115 - 230 50/60 Hz
2.1.4
The instrument has been designed to be easily transported from one location to
another and will be in a stable and accurate operation condition in less than one
minute from turn on time.
2.2.0
AC Power Input Considerations
2.2.1
All instruments are supplied with a standard three (3) prong polarized plug and
power cable.
2.2.2
A two position slide switch is mounted on the rear panel which is used to set the line
voltage requirements to 115 Vac or 230 Vac. Make sure this switch is in the proper
position for your line power prior to turning the instrument on for the first time.
5
Manuals\1030.wpd
SECTION III
3.0.0
OPERATION OF INSTRUMENT
3.1.0
Front Panel Controls
3.1.1
Power Switch: Line power
3.1.2
Polarity Switch: This switch has 3 settings. With the polarity switch on "+" the red
output terminal is positive with respect to the black terminal. On "-" the red output
terminal is negative with respect to the black terminal. On "0" a short circuit exists
between the red and black output terminal.
3.1.3
Output and Sense Terminals: Four terminals are provided for output and sense. The red
terminals represent the polarity with respect to the black as the common terminals. The
red terminals are indicated by the polarity switch.
NOTICE: THE SENSING CIRCUIT MUST BE COMPLETE!
Please refer to Drawing #930727, in the rear of this manual, for
the two-wire and four-wire connections.
3.1.4
If a high impedance or a low current load is connected, the output and sense
terminals may be shorted with the sense links (provided) e.g. plus output to plus
sense.
3.1.5
If drawing current is desired, the remote sense capability should be used. The
advantage of remote sense is that you have a 4 wire output and the sense lines are
brought directly to the load, thus eliminating the IR drop of the output lines.
3.1.6. Decade Switches: The decade switches are used to select the desired output, and each
switch is labeled with the multiple of the decimal it controls. The decimal lights facilitate
the reading of resolution.
6
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3.2.0
Operation of a Voltage Source
3.2.1
With power switch off, connect power cord to recommended power source, e.g. 115 Vac
230 Hz 50/60 Hz.
3.2.2
Connect the output terminals of the instrument to their respective loads as required.
CAUTION
3.2.3
Do not place more than a 1000 V potential between the output terminals and
chassis ground when using a floating output. In some applications it may be
necessary to isolate chassis from line common. This practice is not
recommended.
3.2.4
With polarity switch on "0" position, place power on switch to the "ON" position. This
procedure will prevent any possible turn on transient from appearing across the output
terminals.
3.2.5
Select the desired output voltage on the decade switches, set range switch to appropriate
range, and switch the polarity switch to required polarity.
7
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SENSE CONNECTIONS
HIGH CURRENT
LOAD
LIGHT LOAD
SENSE
SENSE
+
+
OUTPUT
LOAD
LOAD
OUTPUT
OUTPUT
OUTPUT
-
SENSE
SENSE
GND
+
+
SENSE
OUTPUT
-
+
LOAD
LOAD
GND
-
+
SENSE
OUTPUT
-
GND
GND
[ Sense Links
Removed ]
[ Sense Links
Installed ]
FIG 2
FIG 1
OUTPUT CONNECTOR PIN FUNCTIONS
A
F
B
E
C
D
PIN A
PIN B
PIN C
Pin D
Pin E
Pin F
Chassis Ground
+ Output
- Output
Not Used
- Sense
+ Sense
FIG 3
Reference Drawing #930727-A
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