Keysight Technologies BT2152A Service manual

Keysight BT2152A
Self-Discharge Analyzer
Operating and
Service Guide

Legal and Safety Information 6
Legal Notices 6
Safety Symbols 8
Safety Notices 9
1 Quick Reference 11
Welcome 12
What is self-discharge? 12
Advantages of the Keysight BT2152A Self-Discharge Analyzer 12
Contact Keysight Technologies 12
Models and Specifications 13
Models 13
Front and Rear Views 13
Specifications 14
Characteristics 15
Self-Discharge Measurement Criteria 16
External Temperature Measurement 16
Dimensions and Airflow 17
Command Quick Reference 18
2 Installing the Analyzer 23
Before Installation 24
Inspect the Unit 24
Check for Items Supplied 24
Accessories 24
Review Safety Information 25
Observe Environmental Conditions 25
Provide Adequate Air Flow 25
Connect the Power Cord 26
Connect the Interfaces 27
LAN Connections 27
USB Connections 28
Digital Port Connections 28
Thermistor Connections 28
Connect the Cell Cables 29
Making the Cables 29
RJ45 WIre Color Codes and Pinout Numbers 30
32-Channel Mapping to RJ45 Connectors 31
3 Operating the Analyzer 33
Understanding Front Panel Operation 34
What happens at power-on? 34
What happens when a test is initiated? 35
What happens when a test stops? 35
What happens when the reference temperature exceeds its specification? 35
What happens when a protection event or error occurs? 35
Using the Digital Port 36
Digital Control Port 36
Bi-Directional Digital I/O 36
3 Keysight BT2152A Operating and Service Guide

Digital Input 37
Fault Output 38
Inhibit Input 38
Fault/Inhibit System Protection 39
Maintaining Cell Stability During Testing 40
A Cell's Percent State of Charge 40
Charge Redistribution and Equilibrium 40
Expected Self-Discharge Current and Temperature Dependency 41
Temperature Impact on Current Measurement 41
Impact of Stress and Vibration on Current Measurement 42
4 Programming Reference 43
Introduction to the SCPI Language 44
Command Types 44
Keywords 44
Queries 45
Syntax Conventions 45
Parameter Types 46
Device Clear 47
Programming Samples 48
Setting up and running a test 48
Retrieving all test values 49
Stopping/aborting a test 50
Clearing protection events and errors 50
Commands by Subsystem 51
Calibration Commands 52
Common Commands 58
Digital Commands 61
Fetch Commands 63
Format Command 68
Initiate Commands 69
LXI Command 71
Output Commands 72
Sense Commands 73
Status Commands 75
System Commands 79
Status Tutorial 87
Status Registers 87
Alarm Channel Groups 87
Alarm Status Group 88
Standard Operation Group 88
Status Byte Register 89
Error and Output Queues 90
Status Diagram 91
Reset (*RST) and Interface Settings 92
SCPI Error Messages 93
Error List 93
Keysight BT2152A Operating and Service Guide 4

5 Verification and Calibration 97
Verification Procedure 98
Introduction 98
External DMM Connections and Setup 98
Zero-Scale Current Accuracy Verification 99
Full-Scale Current Accuracy Verification 100
Voltage Accuracy Verification 101
Verification Assembly 102
Reference Calibration 103
Introduction 103
External DMM Connections and Setup 103
Enter Calibration Mode 104
Voltage Calibration 104
Current Calibration 104
End Calibration and Store Results 105
Channel Calibration 106
Prerequisites 106
Running Channel Calibration 106
If Problems Occur with Channel Calibration 106
Aborting Channel Calibration 106
Wire Resistance Calibration 107
Benefits of Wire Resistance Calibration 107
Wire Resistance Compensation Constraints 107
Wire Resistance Calibration Procedure 107
Calibration Security Reset 109
Electrostatic Discharge (ESD) Precautions 109
Tools Required 109
Cover Removal 109
Password Reset 110
Maintenance 111
Index 112
5 Keysight BT2152A Operating and Service Guide

Legal and Safety Information
Legal Notices
Safety Notices
Safety Symbols
Legal Notices
Copyright Notice
© Copyright Keysight Technologies 2017, 2018
No part of this manual may be reproduced in any form or by any means (including electronic storage
and retrieval or translation into a foreign language) without prior agreement and written consent from
Keysight Technologies Inc. as governed by United States and international copyright laws.
Manual Part Number
BT2152A-90001
Edition
Edition 3, September, 2017
Updated August, 2018
Published By
Keysight Technologies
550 Clark Drive, Suite 101
Budd Lake, New Jersey 07828
USA
Warranty
The material contained in this document is provided "as is," and is subject to being changed, without
notice, in future editions. Further, to the maximum extent permitted by applicable law, Keysight
disclaims all warranties, either express or implied, with regard to this manual and any information
contained herein, including but not limited to the implied warranties of merchantability and fitness for
a particular purpose. Keysight shall not be liable for errors or for incidental or consequential damages
in connection with the furnishing, use, or performance of this document or of any information contained
herein. Should Keysight and the user have a separate written agreement with warranty terms
covering the material in this document that conflict with these terms, the warranty terms in the
separate agreement shall control.
Keysight BT2152A Operating and Service Guide 6
Legal and Safety Information

Certification
Keysight Technologies certifies that this product met its published specifications at time of shipment
from the factory. Keysight Technologies further certifies that its calibration measurements are
traceable to the United States National Institute of Standards and Technology, to the extent allowed
by the Institute's calibration facility, and to the calibration facilities of other International Standards
Organization members.
U.S. Government Rights
The Software is "commercial computer software," as defined by Federal Acquisition Regulation (“FAR”) 2.101.
Pursuant to FAR 12.212 and 27.405-3 and Department of Defense FAR Supplement (“DFARS”) 227.7202, the U.S.
government acquires commercial computer software under the same terms by which the software is customarily
provided to the public. Accordingly, Keysight provides the Software to U.S. government customers under its
standard commercial license, which is embodied in its End User License Agreement (EULA), a copy of which can
be found at http://www.keysight.com/find/sweula. The license set forth in the EULA represents the exclusive
authority by which the U.S. government may use, modify, distribute, or disclose the Software. The EULA and the
license set forth therein, does not require or permit, among other things, that Keysight: (1) Furnish technical
information related to commercial computer software or commercial computer software documentation that is
not customarily provided to the public; or (2) Relinquish to, or otherwise provide, the government rights in excess of
these rights customarily provided to the public to use, modify, reproduce, release, perform, display, or disclose
commercial computer software or commercial computer software documentation. No additional government
requirements beyond those set forth in the EULA shall apply, except to the extent that those terms, rights, or
licenses are explicitly required from all providers of commercial computer software pursuant to the FAR and the
DFARS and are set forth specifically in writing elsewhere in the EULA. Keysight shall be under no obligation to
update, revise or otherwise modify the Software. With respect to any technical data as defined by FAR 2.101,
pursuant to FAR 12.211 and 27.404.2 and DFARS 227.7102, the U.S. government acquires no greater than Limited
Rights as defined in FAR 27.401 or DFAR 227.7103-5 (c), as applicable in any technical data
Declaration of Conformity
Declarations of Conformity for this product and for other Keysight products may be downloaded from
the Web. Go to http://www.keysight.com/go/conformity and click on "Declarations of Conformity".
You can then search by product number to find the latest Declaration of Conformity.
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
This product complies with the WEEE Directive 2002/96/EC marketing requirement. The affixed
product label (see below) indicates that you must not discard this electrical/electronic product in
domestic household waste.
Product Category: With reference to the equipment types in the WEEE directive Annex 1, this product
is classified as "Monitoring and Control instrumentation" product.
Do not dispose in domestic household waste.
To return unwanted products, contact our local Keysight office.
Legal and Safety Information
7 Keysight BT2152A Operating and Service Guide

Safety Symbols
A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the
like that, if not correctly performed or adhered to, could result in personal injury or DEATH. Do not
proceed beyond a WARNING notice until the indicated conditions are fully understood and met.
A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the
like that, if not correctly performed or adhered to, could result in damage to the product or loss of
important data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully
understood and met.
Direct current
Alternating current
Frame or chassis terminal
Standby supply. Unit is not completely disconnected from AC mains when switch is off.
Risk of electric shock
Refer to accompanying documents
Earth ground terminal
The CE mark is a registered trademark of the European Community.
The ETL mark is a registered trademark of Intertek.
The RCM mark is a registered trademark of the Spectrum Management Agency of Aus-
tralia. This signifies compliance with the Australian EMC Framework regulations under
the terms of the Radio Communications Act of 1992.
South Korean Class A EMC Declaration
This equipment is Class A suitable for professional use and is for use in electromagnetic
environments outside of the home.
Contains one or more of the 6 hazardous substances above the maximum con-
centration value (MCV), 40 Year EPUP.
ISM1-A This text indicates that the instrument is an Industrial Scientific and Medical Group 1
Class A product (CISPER 11, Clause 4).
ICES/NMB-
001
This text indicates product compliance with the Canadian Interference- Causing Equip-
ment Standard (ICES-001).
Keysight BT2152A Operating and Service Guide 8
Legal and Safety Information

Safety Notices
The following general safety precautions must be observed during all phases of operation of this
instrument. Failure to comply with these precautions or with specific warnings or instructions
elsewhere in this manual violates safety standards of design, manufacture, and intended use of the
instrument. Keysight Technologies assumes no liability of the customer’s failure to comply with the
requirements.
General
Do not use this product in any manner not specified by the manufacturer. The protective
features of this product may be impaired if it is used in a manner not specified in the
operating instructions.
Environmental Conditions
Never use the instrument outside of the specified environmental conditions described
under Environmental Conditions.
Ground the Instrument
This product is provided with protective earth terminals. To minimize shock hazard, the
instrument must be connected to the AC mains through a grounded power cable, with
the ground wire firmly connected to an electrical ground (safety ground) at the power
outlet. Any interruption of the protective (grounding) conductor or disconnection of the
protective earth terminal will cause a potential shock hazard that could result in injury
or death.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes.
Do Not Remove the Instrument Cover
Only qualified, service-trained personnel who are aware of the hazards involved should
remove covers. Always disconnect external power.
Do Not Modify the Instrument
Do not install substitute parts or perform any unauthorized modification to the product.
Return the product to a Keysight Sales and Service Office for service and repair to
ensure that safety features are maintained.
Fuses
The instrument contains an internal fuse, which is not customer accessible.
Legal and Safety Information
9 Keysight BT2152A Operating and Service Guide

Cleaning
To prevent electric shock, always unplug the unit before cleaning. Use a dry cloth or
one slightly dampened with water to clean the external case parts. Do not use
detergent or chemical solvents. Do not attempt to clean internally.
In Case of Damage
Instruments that are not functioning correctly, appear damaged or defective should be
made inoperative and secured against unintended operation until they can be repaired
by qualified service personnel.
Keysight BT2152A Operating and Service Guide 10
Legal and Safety Information

Keysight BT2152A Operating and Service Guide
1
Quick Reference
Welcome
Models and Specifications
Command Quick Reference

Welcome
What is self-discharge?
Self-discharge of an electrical cell is the loss of charge over time while not connected to any load.
Some amount of self-discharge is a normal attribute resulting from chemical reactions taking place
within the cell. Additional self-discharge can result from leakage current paths existing within the cell.
Particulate contaminants and dendrite growths produce internal “micro-shorts”, creating such
leakage current paths. These are not normal attributes and they can lead to catastrophic failure of the
cell. For this reason it is a priority to evaluate cells for self-discharge.
Electrically, self-discharge can be modeled as a high-value resistance existing in parallel across the
cell. Note that self-discharge current is very difficult to measure in practice. Usually a defective cell
can only be detected after days or weeks of aging. This is where the proprietary technology of the
Keysight BT2152A Self-Discharge Analyzer provides a superior method of measuring self-discharge
over other traditional methods.
Advantages of the Keysight BT2152A Self-Discharge Analyzer
The Keysight BT2152A Self-Discharge Analyzer uses a proprietary measurement technique to
determine the open-circuit discharge of the cell due to its internal parallel resistance. This proprietary
direct measurement technique lets you determine the quality of the cell within one to two hours after
the cell has been initially charged and rested. This can significantly reduce the test time required to
determine the self-discharge characteristic of the cell due to internal parallel resistance. Key test
features are as follows:
lThe voltage applied to the cell is quickly matched (±5 μV) to the actual cell voltage. This minimizes
any new charge or discharge and limits any new RC settling to a minimum.
lThe voltage applied to the cell is very stable (±10 μVpeak) to minimize continuing charge redistribution
current noise on the self-discharge current measurement.
lThe Measurement System accurately measures low-level self-discharge currents to ± (0.33% of read-
ing + 1 μA).
Contact Keysight Technologies
You can contact Keysight Technologies for warranty, service, or technical support.
Use www.keysight.com/find/assist for information on contacting Keysight worldwide, or contact your
Keysight Technologies representative.
1 Quick Reference
12 Keysight BT2152A Operating and Service Guide

Models and Specifications
Front and Rear Views
Specifications
Characteristics
Self-Discharge Measurement Criteria
External Temperature Measurement
Dimensions and Airflow
Models
lKeysight BT2152A - 32 channel Self-Discharge Analyzer
Front and Rear Views
1. Line switch Turns the unit on or off
2. Status Indicators
and switches
Power: Green LED indicates power is on.
LAN: Green LED indicates the LAN connection is active. Flashing green indicates an LXI iden-
tification query is sent. Flashing blue indicates a SCPI command is received. Red indicates a
LAN fault.
Ready: Amber indicates the unit is warming up. A warmup time of 1 hour is required. Green
indicates the unit is ready to start the test.
Test: Flashing blue indicates that cell matching has been initiated. Blue indicates a test is run-
ning. Off indicates no test is running. Flashing orange indicates calibration.
Error: Red indicates an error has occurred. Off indicates protection is cleared.
LANreset: This recessed switch performs a software system LAN reset.
Aux: This switch is reserved for future use.
Stop: This switch aborts any current measurements and sequences. The unit returns to a state
of being ready for initialization.
3. Air Inlet Air inlet requires a minimum of 6 inch (15 cm) clearance
Keysight BT2152A Operating and Service Guide 13
1 Quick Reference

4. Digital connector An 8-pin digital IO interface
5. USB USB interface connector
6. LAN 10/100/1000 Base-T
Left LED indicates link speed (Green 1 Gbps, Orange is 100 Mbps, Off is 10 Mbps with activity
blinking) Right LED indicates activity
7. Universal AC input Standard IEC 320 connector
8. Calibration port Calibration port
9. Temperature sensor Temperature sensor input (requires an external 10 kΩthermistor)
10. RJ45 connectors Eight RJ45 connectors for 32-channel cell connections (4 cell connections are available on
each RJ45 connector)
11. Air Outlets1The rear air outlet requires a minimum of 6 inch (15 cm) clearance
Specifications
Unless otherwise noted, specifications are warranted over the ambient temperature range of 20°C to
30°C after a 1 hour warm-up period.
Parameter Specification
Number of channels: Standard 32 channels
Optional configurations available in 4- channel increments
Current measurement accuracy:1± (0.33% + 1 μA)
Voltage measurement accuracy: ± (0.05% + 1 mV)
1Current measurement accuracy is measured at 1 minute integration.
1 Quick Reference
14 Keysight BT2152A Operating and Service Guide

Characteristics
Characteristics are not warranted but are descriptions of performance determined either by design or
by type testing. Characteristics are typical unless otherwise noted.
Parameter Characteristic
Voltage measurement and output range: 0.5 V to + 4.5 V
Current measurement range: ± 10 mA
Programmable resistance range: 0.1 Ω to 10 Ω
Initial cell voltage matching ± 5 μV
Voltage sourcing stability (typical)1,2 ± 10 μVpeak
Warm-up time after power-on: 1 hour
Environmental conditions:
Operating environment:
Ambient temperature range:3
Relative humidity:
Altitude:
Storage temperature:
Indoor use, installation category II (for AC input), pollution degree2
20°C to 30°C
Up to 80% (non-condensing)
Up to 2000 meters
-30°C to 70°C
Digital Port
Max voltage rating:
Pins 1 & 2 as FLT:
Pins 1-7 as outputs:
Pins 1-7 as inputs:
Pin 8:
+16.5 VDC/- 5 VDC between pins
Maximum low-level output voltage = 0.5 V @ 4 mA
Maximum low-level sink current = 4 mA
Typical high-level leakage current = 1 mA @ 16.5 VDC
Maximum low-level output voltage = 0.5 V @ 4 mA;
1 V @ 50 mA; 1.75 V @ 100 mA
Maximum low-level sink current = 100 mA
Typical high-level leakage current = 0.8 mA @ 16.5 VDC
Maximum low-level inputvoltage = 0.8 V
Minimum high-level input voltage = 2 V
Typical low-level current = 2 mA @ 0 V (internal 2.2k pull-up)
Typical high-level leakage current = 0.12 mA @ 16.5 VDC
Pin 8 is common (internally connected to chassis ground)
AC input
Range:
Frequency:
VA:
100-240 VAC
50/60 Hz
170 VA Max
1Output voltage stability is measured over 24 hours at 1 minute integration.
2Specification applies at output terminals. Cabling and interconnect errors may degrade this significantly.
3Maximum rate-of-change (dT/dt) must be <5°C/hour.
Keysight BT2152A Operating and Service Guide 15
1 Quick Reference

Self-Discharge Measurement Criteria
To quickly measure the self-discharge behavior of a Lithium ion cell requires characterizing a number
of test parameters, and verifying that their effect will result in a valid self-discharge measurement.
The following inequality describes the parameter constraints that must be satisfied for a valid self-
discharge measurement, one that results in a voltage value between 0.5 V and 4.5 V.
0.5V ≤ VCELL + I*(6.2Ω + RCABLES + RESR - <res>) ≤ 4.5V
where
VCELL is the open circuit voltage of the cell. This can be provided by the user, or measured with the
Keysight BT2152A.
Iis the instantaneous current obtained during the self-discharge test. This is the Keysight BT2152A’s
current measurement value. The inequality constraints must be satisfied for all measured current
results, both positive and negative. This includes the initial current, final settled current value, and any
transients that may occur. Note that the current measurement range for the unit is ±10 mA; however,
the resultant value should be positive and much lower than 10 mA -- usually in the 10 to 100
microampere range.
RCABLES is the resistance of the total cable wiring from the Keysight BT2152A to the cell under test.
This can be provided by the user through external measurements, or it can be calibrated directly by
the Keysight BT2152A’s CALibration:WIRE:RESistance:AUTO command. It can also be modified using
the SENSe:WIRE:RESistance:CONFigure command.
RESR is cell’s internal equivalent series resistance. This can be provided by the user if necessary by
adding it to the resistance of the total cabling wiring from the Keysight BT2152A to the cell under test,
using the SENSe:WIRE:RESistance:CONFigure command. Typically this value is less than 10 mΩ.
<res> is the user-selected output resistance from 0.1 Ω to 10 Ω. This is the same value entered using
the INITiate:TEST:MATChed command.
External Temperature Measurement
The external temperature sensor input on the rear panel requires an external 10 kΩ thermistor.
Measurement Input Characteristic
Thermistor Requirements: Negative Temperature coefficient (NTC)
10 kΩ Nominal Resistance at 25°C
Programmable Beta value (4073 default)
Temperature measurement range: 5°C to 100°C
Temperature measurement uncertainty: ± 1.5°C
Maximum total lead resistance allowed: 10 Ω
1 Quick Reference
16 Keysight BT2152A Operating and Service Guide

Dimensions and Airflow
Do not block the air intake at the front and side, or the exhaust at the rear of the instrument.
lThe front air inlet requires a minimum of 6 inches (15 cm) clearance. Inlet air temperature must be
within the temperature range of 20°C to 30°C.
lThe rear air outlet requires a minimum of 6 inches (15 cm) clearance.
lThe small air outlet on the left side of the unit must also be unrestricted, with a minimum clearance of
1.25 inches (30 mm) or more. Clearance to the instrument support rail could be as small as 10 mm if
rack mounted.
lThe instrument should not be installed in a pressured rack or enclosure.
Keysight BT2152A Operating and Service Guide 17
1 Quick Reference

Command Quick Reference
CALibration
:DATE <date> Sets the calibration date
:END Ends calibration
:LOAD Loads the previous calibration values
:RESult? <value> Enters the resulting measurement for calibration
:SECure
:CODE <code> Sets a calibration security code
:STATe 0|OFF|1|ON Secures or unsecures calibration
:STARt Initiates calibration
:STEP <step> Steps through the different calibration processes
:STORe Stores the cal constants in the EEPROM
:STRing <string> Stores a message in calibration memory
:VALue? <step> Returns the calibration constants of the step
:VERification
:END Ends the verification process
:STARt <channel> Starts the verification process
:VOLTage <voltage> Enters the output voltage for verification
:MEASure
:INITiate <time>, <tint> Starts a verification measurement
:WIRE
:RESistance
:AUTO Runs auto-calibration of the wire resistance
:CLEar Resets all wiring resistance values to zero
:LOAD <value> Loads the wiring resistance values from a file
:SAVE <value> Saves the wiring resistance values to a file
Common Commands
ABORt Aborts the measurement in progress
*CAL? Initiates auto-calibration on all channels
*CLS Clears status
*IDN? Returns instrument identification
*OPC? Returns "1" to the output buffer when all pending operations complete
*RST Resets the instrument
*STB? Status byte query
*TST? Self-test query
*WAI Pauses command processing until all pending operations are complete
1 Quick Reference
18 Keysight BT2152A Operating and Service Guide

[SOURce:]DIGital [SOURce:] is optional
:INPut
:DATA? Reads the state of the digital control port
:OUTPut
:DATA <value> Sets the state of the digital control port
:PIN<1-7>
:FUNCtion DIO|DINPut|FAULt|INHibit Specifies the pin function
:POLarity POSitive|NEGative Specifies the pin polarity
FETCh
:CURRent
:LATest? (@<chanlist>) Returns the most recent measurements
:LOG? <values/chan> [,<offset/chan>], (@<chanlist>) Returns the measurement log in ASCii
:BINary? <values/chan>, (@<chanlist>) Returns the measurement log in binary
:POINts? Returns the number of readings available
:PROBecheck? (@<chanlist>) Returns results of the probe check test
:TEMPerature
:LATest? Returns the most recent temperature
:LOG? <values> [,<offset>] Returns the temperature log in ASCii
:LOG
:BINary? <values> Returns the temperature log in binary
:POINts? Returns the number of readings available
:VOLTage
:LATest? (@<chanlist>) Returns the most recent measurements
:LOG? <values/chan> [,<offset/chan>], (@<chanlist>) Returns the measurement log in ASCii
:LOG
:BINary? <values/chan>, (@<chanlist>) Returns the measurement log in binary
:POINts? Returns the number of readings available
:OCV? (@<chanlist>) Retrieves the open-circuit voltage values
FORMat
:BORDer NORM|SWAP Selects the byte order for binary block transfers
INITiate
:TEST
:MATChed <time><units>, <ovp>, <uvp>, <res>
[,<tint>[,<curr>[,<ocp>]]], (@<chanlist>)
Sets parameters for the voltage matched
discharge current measurement
:OCV (@<chanlist>) Initiates an open-circuit voltage test
:PROBecheck (@<chanlist>) Initiates a probe check test
Keysight BT2152A Operating and Service Guide 19
1 Quick Reference

LXI
:IDENtify[:STATe] 0|OFF|1|ON Turns the front panel LXI identify indicator on or off
OUTPut
:INHibit
:MODE LATChing|LIVE|OFF Sets the operating mode of the Inhibit Input digital pin
:PROTection
:CLEar Resets any protection events that have occurred
SENSe
:OCV
:AVAIlable? Returns availability of the OCV measurement
:PROBecheck
:AVAIlable? Returns availability of the probe check test
:THERmistor
:CONFigure <temp>, <resistance>, <beta> Specifies parameters for the external thermistor
:TTIMe
:REMaining? Returns the remaining time for the present test
:VERification
:AVAIlable? Returns availability of the calibration verification
:WIRE
:RESistance
:AVAIlable? Returns availability of the wire resistance values
:CONFigure <resistance>, (@<chanlist>) Specifies the wiring resistance of each channel
STATus
:ALARm
[:EVENt]? Queries the alarm event register
:CONDition? Queries the alarm condition register
:CURRent? Returns the sum of the over-current condition bits
:VOLTage? Returns the sum of the over-voltage condition bits
:UNDer? Returns the sum of the under-voltage condition bits
:ENABle <value> Sets the alarm enable register.
:OPERation
[:EVENt]? Queries the operation event register
:CONDition? Queries the operation condition register
:ENABle <value> Sets the operation enable register
1 Quick Reference
20 Keysight BT2152A Operating and Service Guide