ACTION [X] ON SPECIFIED FAILURE
CATEGORY: [[]] AGREEABLE TIME
STANDARDS
LABOR: 0.1 Hours
LOCATION [X] CUSTOMER INSTALLABLE
CATEGORY: [[]] ON-SITE (active On-site contract required)
[[]] SERVICE CENTER
[[]] CHANNEL PARTNERS
SERVICE: [[]] RETURN
INVENTORY: [[]] SCRAP
[x] SEE TEXT
USED [[]] RETURN
PARTS: [[]] SCRAP
[x] SEE TEXT
AVAILABILITY: PRODUCT’S SUPPORT LIFE
NO CHARGE AVAILABLE UNTIL: 20 April 2017
[[]] Calibration Required
[X] Calibration NOT Required
PRODUCT LINE: WC
AUTHOR: SJ
ADDITIONAL INFORMATION:
Modification Recommended
Service Note
U1252B-06
U1252B Handheld Digit Multimeter
Serial Numbers: “See Appendix (A)"
The Problem – Capacitance measurement may be out of specification at 100nF range and below.
Parts Required:
P/N Description Qty.
Pomona 2BC-36 double banana plug both ends cable assembly
Supersedes:
NONE
ADMINISTRATIVE INFORMATION
© Keysight Technologies 2015-2016
Modification Recommended Service Note
Version 1.2 | April 25, 2016| Page 1 of 3
Situation:
U1252B within the serial number range may not meet the specification for capacitance
measurement in 100nF range and below. This is due to improper open adjustment performed at
factory which the cable has been used to perform the open adjustment, has caused a negative
offset stored in the multimeter’s memory.
Solution/Action:
To verify whether the multimeter is impacted with capacitance measurement in 100nF range and
below:
1. Turn the knob to the Capacitance measurement position.
2. Manual set the range to 10 nF range.
3. Plug in one end of the Pomono 2BC-36 cable assembly across the capacitance measurement
terminal, leave the other end of the cable assembly open.
4. The U1252B should read between 0.8nF to 1.1nF, otherwise the “Open” calibration adjustment
was performed incorrectly.
To correct the multimeter capacitance measurement in 100nF range and below:
5. Unplug any cable from the multimeter’s terminal.
6. By referring to the service guide procedure
(http://literature.cdn.keysight.com/litweb/pdf/U1251-90036.pdf ),, unsecure the meter to
enter into the calibration adjustment mode.
7. Turn the knob to the Capacitance measurement position.
8. Perform ONLY the “Open” adjustment in Capacitance measurement without any cable
connected to the multimeter.
9. Exit calibration adjustment mode after the “Open” adjustment is done.
10. Verify the “Open” adjustment has been performed correctly by repeating step 1 to step 4.
Customers who have purchased the U1252B Multimeter within the serial number range stated in this
service note will receive a complementary Pomona 2BC-36 cable assembly.
Each customer is entitled to one free Pomona 2BC-36 cable assembly.
To request a free Pomona 2BC-36 cable assembly, please click HERE
(http://www.keysight.com/find/pomona2BCcablerequest) and provide the following information on the
web form:
1. Instrument Model Number
2. Serial Number
3. Name of distributor who sold this unit
4. Date of purchase
5. Delivery details:
Receiver’s Name
Receiver’s Address
Receiver’s Telephone number
Keysight will arrange for the shipment of the free Pomona 2BC-36 cable assembly to the customer.
Modification Recommended Service Note
© Keysight Technologies 2015-2016
Version 1.2 | April 25, 2016| Page 2 of 3
Date
Service
Note
Revision
Author
Reason for Change
20 April 2017
01
SJ
As Published
MY53480020
MY54060010
MY54150041
MY54220298
MY54250189
MY54370052
MY54380017
MY53480025
MY54070013
MY54170040
MY54220337
MY54250230
MY54370054
MY54380018
MY53510009
MY54070017
MY54170102
MY54220343
MY54250252
MY54370074
MY54380020
MY53510124
MY54080005
MY54170111
MY54220364
MY54250260
MY54370098
MY54380023
MY53520204
MY54090002
MY54170156
MY54230002
MY54260090
MY54370100
MY54380031
MY53520209
MY54090007
MY54190002
MY54240004
MY54260103
MY54370108
MY54380054
MY53520214
MY54110066
MY54200068
MY54240008
MY54260113
MY54370114
MY54380066
MY53520225
MY54120062
MY54200069
MY54240019
MY54270137
MY54370121
MY54380106
MY53520227
MY54120092
MY54200072
MY54240037
MY54270301
MY54370138
MY53520229
MY54120162
MY54220108
MY54240050
MY54280048
MY54370139
MY53520238
MY54120199
MY54220109
MY54250005
MY54320004
MY54370144
MY53520246
MY54120244
MY54220112
MY54250014
MY54320103
MY54370145
MY53520247
MY54120246
MY54220119
MY54250017
MY54320120
MY54370150
MY53520249
MY54120273
MY54220132
MY54250043
MY54320143
MY54370152
MY54050011
MY54130079
MY54220150
MY54250089
MY54320147
MY54370165
MY54050016
MY54130182
MY54220152
MY54250100
MY54330085
MY54370173
MY54050023
MY54130268
MY54220156
MY54250119
MY54370008
MY54370174
MY54050024
MY54150015
MY54220244
MY54250146
MY54370039
MY54370176
MY54050034
MY54150028
MY54220258
MY54250173
MY54370046
MY54380010
MY54050035
MY54150040
MY54220271
MY54250183
MY54370047
MY54380015
Revision History:
Appendix (A):
Modification Recommended Service Note
© Keysight Technologies 2015-2016
Version 1.2 | April 25, 2016| Page 3 of 3
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