Keithley 2001 User Manual

IEEE-488 Reference
4-9
Operation Event Enable Register  This register is pro-
grammed by the user and serves as a mask for the Operation
Event Register. When masked, a set bit in the Operation
Event Register will not set the Operation Summary Bit
(OSB) in the Status Byte Register. Conversely, when un-
masked, a set bit in the Operation Event Register will set the
OSB bit.
A bit in the Operation Event Register is masked when the
corresponding bit in the Operation Event Enable Register is
cleared (0). When the masked bit of the Operation Event
Register sets, it is ANDed with the corresponding cleared bit
in the Operation Event Enable Register. The logic “0” output
of the AND gate is applied to the input of the OR gate and
thus, will not set the OSB bit in the Status Byte Register.
A bit in the Operation Event Register is unmasked when the
corresponding bit in the Operation Event Enable Register is
set (1). When the unmasked bit of the Operation Event Reg-
ister sets, it is ANDed with the corresponding set bit in the
Operation Event Enable Register. The logic “1” output of the
AND gate is applied to the input of the OR gate and thus, will
set the OSB bit in the Status Byte Register.
The individual bits of the Operation Event Enable Register
can be set or cleared by using the following SCPI command:
:STATus:OPERation:ENABle <NRf>
The following SCPI query command can be used to read the
Operation Event Enable Register:
:STATus:OPERation:ENABle?
Reading this register using the above SCPI command does
not clear the register. The following list summarizes opera-
tions that will clear the Operation Event Enable Register:
1. Cycling power.
2. Sending the :STATus:PRESet command.
3. Sending the :STATus:OPERation:ENABle 0 com-
mand.
4.6.3 Arm event status
The reporting of the arm event is controlled by a set of 16-bit
registers; the Arm Condition Register, the Transition Filter,
the Arm Event Register, and the Arm Event Enable Register.
Figure 4-8 shows how these registers are structured. Notice
in Figure 4-5 that bit B1 (In An arm layer) of the Arm Con-
dition Register is controlled by the sequence event register
set (see paragraph 4.6.4 for details). In general, bit B1 sets
when the instrument is in the arm layer (arm layer 1) or scan
layer (arm layer 2) of operation. An explanation of the oper-
ation process over bus is provided in paragraph 4.7.
The various registers used for arm event status are described
as follows. Note that these registers are controlled by the
:STATus:OPERation:ARM commands of the :STATus sub-
system (see paragraph 4.21).
Arm Condition Register  This is a real-time 16-bit read-
only register that constantly updates to reflect the ORed sum-
mary of the sequence event register set. In general, if bit B1
is set, the instrument is in an arm layer. The following SCPI
query command can be used to read the Arm Condition Reg-
ister:
:STATus:OPERation:ARM:CONDition?
The Arm Condition Register and the Transition Filter are
used to set the bits of the Arm Event Register. The Transition
Filter is discussed next.
Arm Transition Filter  The transition filter is made up of
two 16-bit registers that are programmed by the user. It is
used to specify which transition (0 to 1, or 1 to 0) of bit B1
in the Arm Condition Register will set bit B1 in the Arm
Event Register.
The filter can be programmed for positive transitions (PTR),
negative transitions (NTR) or both. When an event bit is pro-
grammed for a positive transition, the event bit in the Arm
Event Register will set when the corresponding bit in the
Arm Condition Register changes from 0 to 1. Conversely,
when programmed for a negative transition, the bit in the sta-
tus register will set when the corresponding bit in the condi-
tion register changes from 1 to 0. The transition filter
registers can be set or cleared by using the following SCPI
commands:
:STATus:OPERation:ARM:PTR <NRf>
:STATus:OPERation:ARM:NTR <NRf>
The transition filter registers can be read at any time by using
the following SCPI query commands:
:STATus:OPERation:ARM:PTR?
:STATus:OPERation:ARM:NTR?
Reading a transition filter register using the above query
commands does not affect the contents of the register.
The following operations will set (1) all the bits of the PTR
register and reset (0) all the bits of the NTR register:
1. Cycling power.
2. Sending the :STATus:PRESet command.
3. Sending the :STATus:OPERation:ARM:PTR 65535
and :STATus:OPERation:ARM:NTR 0 commands.

Keithley 2001 Specifications

General

Model	2001
Category	Multimeter
Manufacturer	Keithley
Type	Digital Multimeter
Digits of Resolution	7.5
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Frequency Range	3 Hz to 500 kHz
Connectivity	GPIB, RS-232
Display	VFD
Resistance Accuracy	0.008% + 2.0 mΩ
Frequency Accuracy	±0.01%
DC Current Range	10 μA to 3 A
AC Current Range	10 μA to 3 A
Power Supply	100 V to 240 V AC, 45 Hz to 66 Hz

Summary

WARRANTY

LIMITATION OF WARRANTY

Manual Print History

Safety Precautions

General Information

Introduction

Contains general information about the Model 2001.

Features

Lists important Model 2001 features such as full range of functions and two-line display.

Options and accessories

Details available options and accessories for the Model 2001.

Getting Started

Front and rear panel summary

Describes controls, connectors on front/rear panels, and the front panel display.

Initial configuration

Reviews initial configuration information for operation.

Front panel operation

Demonstrates basic front panel operation with examples.

Front Panel Operation

Power-up procedure

Covers connecting to line power, warm-up, defaults, and sequence.

Display

Covers display format and messages.

Functions

Describes measurement functions like DC/AC voltage, current, resistance, frequency, temp.

IEEE-488 Reference

IEEE-488 bus connections

Explains instrument connections to the IEEE-488 bus.

Primary address selection

Explains how to set the primary address from the front panel.

Status structure

Explains the various registers and queues that make up the status structure.

Specifications

Model 2001 Specifications

Contains complete specifications for the 2001, including accuracy and calibration intervals.

ABSOLUTE ACCURACY

Details absolute accuracy specifications traceable to NIST.

TYPICAL ACCURACIES

Specifies typical accuracies, warranted unless noted.

DC VOLTS

DCV INPUT CHARACTERISTICS AND ACCURACY

Details DCV input characteristics and accuracy.

SPEED AND ACCURACY

Provides speed and accuracy specifications for DCV.

DCV READING RATES

Lists DCV reading rates for various configurations.

DCV PEAK SPIKES MEASUREMENT

REPETITIVE SPIKES ACCURACY

Specifies accuracy for repetitive spikes.

AC VOLTS

ACV INPUT CHARACTERISTICS

Details ACV input characteristics.

NORMAL MODE RMS

Provides RMS accuracy specifications for normal mode.

AVERAGE ACV MEASUREMENT

Specifies accuracy for average ACV measurements.

AC VOLTS (cont’d)

SETTLING CHARACTERISTICS

Describes settling characteristics for normal mode.

COMMON MODE REJECTION

Specifies common mode rejection for 1kΩ imbalance.

MAXIMUM VOLT•Hz PRODUCT

States the maximum voltage-frequency product.

OHMS

TWO-WIRE AND FOUR-WIRE OHMS (2W and 4W Ohms Functions)

Details 2-wire and 4-wire resistance measurements.

SPEED AND ACCURACY

Provides speed and accuracy for ohms measurements.

DC AMPS

DCI INPUT CHARACTERISTICS AND ACCURACY

Details DC current input characteristics and accuracy.

DCI READING RATES

Lists DCI reading rates for various configurations.

AC AMPS

ACI INPUT CHARACTERISTICS

Details AC current input characteristics.

AC COUPLING

Selects input coupling for AC current measurements.

ACV CREST FACTOR MEASUREMENT

Explains ACV crest factor measurement.

OPERATING SPEED

Command Receive and Interpret Speed

Details the speed for command receive and interpret.

FUNCTION CHANGE SPEED

Describes speed for changing functions.

MIXED FUNCTION SCAN SPEED

Provides speed for mixed function scan.

Default Conditions

Calculate 1 subsystem

Subsystem to control CALC 1 math calculations.

Calculate 2 subsystem

Subsystem to control CALC 2 operations on buffer data.

Calculate 3 subsystem

Subsystem to control CALC 3 limit tests.

Default Conditions (cont.)

Calibration subsystem

Controls calibration parameters.

Display subsystem

Controls display readings and messages.

Route subsystem

Controls switching operations.

Default Conditions (cont.)

Sense commands

Configures and controls measurement functions and digital input port.

AC current commands

Configures AC current measurement parameters.

DC current commands

Configures DC current measurement parameters.

Default Conditions (cont.)

AC voltage commands

Configures AC voltage measurement parameters.

Default Conditions (cont.)

2-wire resistance commands

Configures 2-wire resistance measurements.

Default Conditions (cont.)

4-wire resistance commands

Configures 4-wire resistance measurements.

Temperature commands

Configures temperature measurements.

IEEE-488.2 Common Commands

*CLS — clear status

Clears all event registers and the Error Queue.

*RST — reset

Returns the instrument to the *RST default conditions.

SCPI Command Subsystems

:CALCulate[1]

Subsystem to control CALC 1 math calculations.

:CALCulate2

Subsystem to control CALC 2 operations on buffer data.

:CALCulate3

Subsystem to control CALC 3 limit tests.

SCPI Command Subsystems (cont.)

:CALCulate3 :LIMit[1]

Path to configure upper limit for LIMIT 1 test.

SCPI Command Subsystems (cont.)

:CALCulate3 :LIMit2

Path to control LIMIT 2 test.

SCPI Command Subsystems (cont.)

:DISPlay subsystem

Controls display readings and messages.

SCPI Command Subsystems (cont.)

:FORMat subsystem

Covers commands to select data format for transferring readings.

:OUTPut subsystem

Covers commands to set polarity for digital output lines.

SCPI Command Subsystems (cont.)

:ROUTe subsystem

Controls switching operations.

SCPI Command Subsystems (cont.)

:SENSe[1]] subsystem

Configures and controls measurement functions.

SCPI Command Subsystems (cont.)

:CURRent AC

Configures AC current measurement parameters.

SCPI Command Subsystems (cont.)

:CURRent[:DC]

Configures DC current measurement parameters.

SCPI Command Subsystems (cont.)

:VOLTage:AC

Configures AC voltage measurement parameters.

SCPI Command Subsystems (cont.)

:VOLTage[:DC]

Configures DC voltage measurement parameters.

SCPI Command Subsystems (cont.)

:RESistance

Configures 2-wire resistance measurements.

SCPI Command Subsystems (cont.)

:FRESistance

Configures 4-wire resistance measurements.

SCPI Command Subsystems (cont.)

:TEMPerature

Configures temperature measurements.

SCPI Command Subsystems (cont.)

:TRANsducer <name>

Specifies transducer type for temperature measurements.

SCPI Command Subsystems (cont.)

:RTD commands

Programs RTD parameters.

SCPI Command Subsystems (cont.)

:TCouple:TYPE <name>

Configures the thermocouple type for measurements.

SCPI Command Subsystems (cont.)

:RJUNctionX

Configures the specified reference junction for thermocouple measurements.

SCPI Command Subsystems (cont.)

:SIMulated <n>

Specifies the simulated reference temperature.

SCPI Command Subsystems (cont.)

:REAL

Specifies the temperature coefficient (TC) of the 'real' reference junction.

Interface Function Codes

ASCII Character Codes and IEEE-488 Multiline Interface Command Messages

Controller Programs

IBM PC/XT/AT with Capital Equipment Corporation PC<>488 Interface (Keithley PC-488-CEC)

Control program for IBM PC/XT/AT with CEC PC<>488 Interface.

IBM PC/XT/AT or PS/2 with IOtech Driver488 Software

Control program for IBM PC/XT/AT with IOtech Driver488 Software.

IEEE-488 Bus Overview

Introduction

Explains the IEEE-488 bus communication system.

Bus description

Describes the IEEE-488 bus structure and signal lines.

Bus lines

Details data lines, management lines, and handshake lines.

IEEE-488 Bus Overview (cont.)

Universal multiline commands

General bus commands requiring no addressing.

Addressed multiline commands

Commands requiring device address.

Common commands

Commands common to all devices on the bus.

IEEE-488 Conformance Information

SCPI Conformance Information (cont.)

SCPI Conformance Information (cont.)

SCPI Conformance Information (cont.)

SCPI Command Subsystems

*CLS — clear status

Clears all event registers and the Error Queue.

*RST — reset

Returns the Model 2001 to the *RST default conditions.