Fluke 8588A User manual
8588A/8558A
Reference Multimeter / 8½ Digit Multimeter
Service Manual
July 2019
© 2019 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
LIMITED WARRANTY AND LIMITATION OF LIABILITY
Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and services
are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of a Fluke
authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in Fluke's opinion,
has been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation
or handling. Fluke warrants that software will operate substantially in accordance with its functional specifications
for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that software
will be error free or operate without interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but
have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if
product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price.
Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product purchased
in one country is submitted for repair in another country.
Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair, or
replacement of a defective product which is returned to a Fluke authorized service center within the warranty
period.
To obtain warranty service, contact your nearest Fluke authorized service center to obtain return authorization
information, then send the product to that service center, with a description of the difficulty, postage and insurance
prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following warranty repair, the product will
be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused by
neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including
overvoltage failures caused by use outside the product’s specified rating, or normal wear and tear of mechanical
components, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work.
Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the
repair and return transportation charges (FOB Shipping Point).
THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF
DATA, ARISING FROM ANY CAUSE OR THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation
of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every
buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other decision-maker of
competent jurisdiction, such holding will not affect the validity or enforceability of any other provision.
11/99
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
ООО «Флюк СИАЙЭС»
125167, г. Москва,
Ленинградский проспект дом 37,
корпус 9, подъезд 4, 1 этаж
i
Table of Contents
Title Page
Introduction................................................................................................ 1
Safety Information ..................................................................................... 1
Specifications ............................................................................................ 1
Usage Information ..................................................................................... 1
Contact Fluke Calibration .......................................................................... 2
Calibration Interval and Performance........................................................ 2
Required Equipment ............................................................................. 2
Calibration Adjustment Overview.......................................................... 3
Manual Adjustment .......................................................................... 3
Remote Adjustment .............................................................................. 6
Calibration Verification............................................................................... 6
DC Voltage ........................................................................................... 6
Digitize DC Voltage............................................................................... 11
DC Current............................................................................................ 12
Digitize DC Current............................................................................... 15
AC Voltage............................................................................................ 16
Resistance Normal ............................................................................... 23
Resistance – Tru Ohms ........................................................................ 24
Resistance - Low Current ..................................................................... 25
Resistance - Tru Ohms, Low Current ................................................... 26
Resistance - HV Ohms ......................................................................... 26
Frequency............................................................................................. 27
Capacitance.......................................................................................... 27
Optional Checks ................................................................................... 28
DC Voltage (Rear Input) .................................................................. 28
DC Current (Rear Input)................................................................... 29
AC Voltage (Rear Input)................................................................... 29
AC Current (Rear Input)................................................................... 29
Resistance – HV Ohms (Rear Input)................................................ 29
Maintenance .............................................................................................. 30
Inspection and Cleaning ....................................................................... 30
Clean the Exterior ................................................................................. 30
Clean the Air Inlet ................................................................................. 30
Fuse Replacement................................................................................ 31
Rear-Input Current Fuse....................................................................... 32
8588A/8558A
Service Manual
ii
Self Test ............................................................................................... 32
List of Replaceable Parts .......................................................................... 33
How to Obtain Parts.............................................................................. 33
Remove Hardware Components .......................................................... 39
Handles............................................................................................ 39
Bottom Feet and Tilt Stand Bail ....................................................... 39
Top and Bottom Covers ................................................................... 39
Front-Panel Assembly...................................................................... 40
Rear Panel ....................................................................................... 40
Remove the Transformer Assembly ................................................ 41
Remove A3 Digital PCA Assembly .................................................. 41
Remove the A2 Analogue Assembly ............................................... 41
Remove the A1 Front PCA (Including Keypad and the Display)......42
1
Introduction
The Fluke 8558A 8 1/2 Digit Multimeter and 8588A Reference Multimeter (the Product or Multimeter
unless otherwise specified) are for demanding and precise measurement applications. The Product
functions in both stand-alone and systems applications. 8 1/2 digit resolution provides high
performance and makes the Product well suited for application use in standards labs, calibration labs,
engineering labs, and systems use. The 8588A includes more features and higher performance for the
most demanding metrology applications.
Safety Information
A Warning identifies conditions and procedures that are dangerous to the user. A Caution identifies
conditions and procedures that can cause damage to the Product or the equipment under test.
General Safety Information is located in the printed Safety Information document that ships with the
Product. It can also be found online at www.Flukecal.com. More specific safety information is listed
where applicable.
Specifications
Safety Specifications are located in Safety Specifications section of the Safety Information document.
Complete specifications are at www.flukecal.com. See the 8588A/8558A Product Specifications.
WWarning
If the Product is operated in any way not specified by this manual or other
documentation provided by Fluke, the protection provided by the Product may be
impaired.
Usage Information
Complete Product usage information is located in the 8588A/8558A Operators Manual found online at
www.Flukecal.com.
8588A/8558A
Service Manual
2
Contact Fluke Calibration
To contact Fluke Calibration, call one of the following telephone numbers:
• Technical Support USA: 1-877-355-3225
• Calibration/Repair USA: 1-877-355-3225
• Canada: 1-800-36-FLUKE (1-800-363-5853)
• Europe: +31-40-2675-200
• Japan: +81-3-6714-3114
• Singapore: +65-6799-5566
• China: +86-400-810-3435
• Brazil: +55-11-3759-7600
• Anywhere in the world: +1-425-446-6110
To see product information and download the latest manual supplements, visit Fluke Calibration’s
website at www.flukecal.com.
To register your product, visit http://flukecal.com/register-product.
Calibration Interval and Performance
Fluke Calibration recommends that the Product be calibrated on one of 2-year, 365-day, or 90-day
intervals depending on the requirements of the applications for which the Product is used.
During manufacture, the Product is adjusted and verified with low uncertainties, reflected in the
Absolute Specifications. After recalibration, the user should apply the calibration uncertainties for the
calibration standards and for the process applicable to that calibration by combining those calibration
uncertainties with the Multimeter Relative to Standards specifications.
Required Equipment
Table 1 lists the necessary equipment to adjust Product calibration.
Table 1. Equipment for Calibration Adjustments and Performance Verification
Equipment Name Recommended Models Comment
Multifunction Calibrator Fluke Calibration 5730A
Amplifier Fluke Calibration 5725A
To increase Volt Hz
product and current range
of the Multifunction
Calibrator
Multiproduct calibrator Fluke Calibration 5522A For voltage >1 MHz and
capacitance verification
Transconductance amplifier Fluke Calibration 52120A For currents >11 A,
verification only
10 GΩ Standard Resistor Verification only
Reference Multimeter / 8½ Digit Multimeter
Calibration Interval and Performance
3
Alternate equipment may be used, but users should ensure it provides adequate calibration
uncertainties. Performance of the Product after calibration should be determined by combining the
applicable calibration uncertainties provided by the calibration equipment with the 8508A Relative to
Standards specifications. (Fluke Calibration recommends RSS summation).
Calibration Adjustment Overview
The Product has two sets of stores: Certified and Baseline. Only the Certified stores can be changed
during adjustment. Store is populated at manufacture and would not normally be overwritten. The
Baseline store provides a facility to monitor the long-term performance of the Product independent of
regular adjustment.
Calibration of all functions of the Multimeter is done from the front panel or remotely. No hardware
adjustments are necessary.
Manual Adjustment
The Product guides you though the manual adjustment process. Some early steps in the process are
only required after the Product is repaired.
The adjustments are numbered in groups:
001 After first build or post repair
101 One-time factory characterizations
201 Voltage
301 Current
401 Resistance
501 Capacitance (not applicable to 8558A)
601 Frequency
701 Zero
The full list of adjustment points and required inputs is in Table 2. Routine adjustment starts at Step
201: ADC Reference Characterize.
Equipment Name Recommended Models Comment
1 GΩ Standard Resistor Fluke Calibration 8508A-7000K
1 GΩ Standard, Low
thermal emf leads, two 4-
wire shorting PCB
100 MΩ Standard Resistor
1 Ω Standard Resistor Fluke 742-1
1 nF Standard Capacitor
8588A adjustment only
(not required for 8558A
adjustment)
10 MHz Reference Off-air standard
4-wire short PCB
Table 1. Equipment for Calibration Adjustments and Performance Verification (cont.)
8588A/8558A
Service Manual
4
Not all function range combinations need to be adjusted. To improve efficiency, some adjustments are
derived from other adjustments, so it is important to follow the adjustment process in the given
sequence. Individual points can be adjusted in isolation later if required.
To enter calibration adjustment mode:
1. Push .
2. Push (Calibration Adjustment).
3. To enter the adjustment mode, push (Enter Passcode).
4. Enter the passcode (123456 is the default).
5. Make sure that Set Active Stores indicates Certified.
6. Push to highlight: Certified Stores Adjustment and push .
The screen for each adjustment step has two to four data fields, see Figure 1.
7. Use Table 2 to apply the input values.
Figure 1. Calibration Adjustment Screen
Regarding the Calibration Adjustment screen (see Figure 1):
•Step number and a description is always present.
•An Input value is always shown. The Input may be a discrete value or N/A (not applicable)
if no input is required (terminals open circuit).
• If Target shows, it is an editable value to allow non-nominal values to be entered, for
example exact resistance reference values.
• Some adjust steps show a measured value. For some steps, the value may not be
obviously related to the step description.
8. When the input requirements (if any) have been applied, push (Adjust) to make the
adjustment.
•Adjust operation: in progress… shows as the adjustment takes place.
•Adjust operation: Done indicates the adjustment is complete.
9. Push (Next Step) to move to the next step in the process.
Reference Multimeter / 8½ Digit Multimeter
Calibration Interval and Performance
5
10. Continue through the adjustment process until all steps are complete.
The last adjustment for 8558A is: Step 703: Current Zero. The last step for 8588A is Step 704:
Capacitance zero.
Table 2. Table Points
Step Description Input
201 ADC Reference Characterize N/A
202 10 mV Offset 0 mV
203 10 mV Gain +10 mV
204 100 mV Offset 0 mV
205 100 mV Gain +100 mV
206 1 V Offset 0 V
207 1 V Gain +1 V
208 10 V Offset 0 V
209 10 V Gain +10 V
210 100 V Offset 0 V
211 100 V Gain +100 V
212 1 kV Offset 0 V
213 1 kV Gain +1 kV
214 ACV 1 MΩ HF 1 kHz Ref 100 V 1 kHz
215 ACV 1 MΩ HF 60 kHz 100 V 60 kHz
301 100 μA Offset 0 μA
302 100 μA Gain +100 μA
303 1 mA Offset 0 mA
304 1 mA Gain +1 mA
305 10 mA Offset 0 mA
306 10 mA Gain +10 mA
307 100 mA Offset 0 mA
308 100 mA Gain +100 mA
309 1 A Offset 0 A
310 1 A Gain +1 A
311 [1] 10 A Offset 0 A
312 [1] 10 A Gain +10 A
8588A/8558A
Service Manual
6
Remote Adjustment
Refer to Manual Adjustment for the process steps. Remote commands are in the Calibration
subsystem section of the 8588A/8558A Programmers Guide found online at www.Flukecal.com.
Calibration Verification
The permissible errors shown are the 99 % confidence, 1-year, absolute errors. These error values
include Fluke Calibration calibration uncertainty. Adjust the permissible error values to reflect the actual
measurement uncertainty if they are different from the listed values.
DC Voltage
Configuration: Z in Auto, Internal Guard, Front Input, Aperture = Auto, Resolution 7.5 Digits, Suggested
Reference: 5730A
Step Description Input
401 Ohms 4W Offset 0 Ω 4W
402 10 Ω Gain 10 Ω 4W
403 100 Ω Gain 100 Ω 4W
404 1 kΩ Gain 1 kΩ 4W
405 10 kΩ Gain 10 kΩ 4W
406 100 kΩ Gain 100 kΩ 4W
407 1 MΩ Gain 1 MΩ 4W
408 10 MΩ Gain 10 MΩ 4W
409 100 MΩ Gain 100 MΩ 4W
410 1 GΩ Gain 1 GΩ 4W
411 1 Ω Zero 0 Ω 4W
412 1 Ω Gain 1 Ω 4W
501 [1] Capacitance Zero N/A
502 [1] 1 nF Gain 1 nF
601 Frequency 10 MHz (Rear BNC)
701 Voltage Zero N/A
702 Resistance Zero 4W 4W Short Circuit
703 Current Zero N/A
704 [1] Capacitance Zero N/A
[1] Points are unavailable in 8558A.
Table 2. Table Points (cont.)
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