Limit operations
Limit operations set and control the values that determine the HI/IN/LO status of subsequent
measurements. The limit test is performed on the result of an enabled Rel, mX+b, or Percent
operation.
There are two sets of limits. Limit 1 uses high and low limits (HI1 and LO1) as does Limit 2
(HI2 and LO2). However, the HI/IN/LO status message only applies to Limit 1.
illustrates the following limits which are the factory defaults:
Limit 1: HI1 = +1V and LO1 = -1V
Limit 2: HI2 = +2V and LO2 = -2V
Figure 8-1
Default limits
For the limits shown in
, a reading of 1.5V is outside Limit 1 (which is the primary
limit). Therefore, the message “HI” will be displayed.
A beeper is also available for limit testing. There are three beeper options: NEVER,
OUTSIDE and INSIDE. These options are explained as follows:
NEVER
— With this option, the beeper is disabled. Only the HI/IN/LO status message is
used for the Limit 1 test.
OUTSIDE
— With this option, the beeper sounds when the reading is outside (HI or LO) of
Limit 1. Again referring to
, a 1.5V reading is outside (HI) Limit 1. Therefore the
beeper will sound.
INSIDE
— With this option, the beeper sounds when the reading is inside Limit 1 and/or
Limit 2. If the reading is inside Limit 1, the beeper will sound at its normal pitch. If the reading
is outside Limit 1 but inside Limit 2, the beeper will sound at a lower pitch. The beeper will not
sound for readings outside Limit 2. For the limits shown in
, a 0.5V reading will sound
the beeper at its normal pitch, a 1.5V reading will sound the beeper at a lower pitch, and for a
2.5V reading, the beeper will not sound.
NOTE
To use the Limit 2 test, the INSIDE beeper mode must be selected. With NEVER or
OUTSIDE selected, Limit 2 is (in effect) disabled.
-2V
LO2
-1V
LO1
+1V
HI1
+2V
HI2
LO
IN
HI
Limit 1
Limit 2
0
Limits
8-3
Summary of Contents for 2182
Page 1: ...www tek com keithley Model 2182 2182A Nanovoltmeter User s Manual 2182A 900 01 Rev B May 2017...
Page 18: ......
Page 22: ......
Page 23: ...1 Getting Started Getting Started...
Page 41: ...2 VoltageandTemperature Measurements Voltageand Temperature Measurements...
Page 68: ...2 28 Voltage and Temperature Measurements...
Page 69: ...3 Range Digits Rate andFilter Range Digits Rate andFilter...
Page 82: ...3 14 Range Digits Rate and Filter...
Page 83: ...4 Relative mX b and Percent Relative mX b andPercent...
Page 91: ...5 RatioandDelta Ratioand Delta...
Page 117: ...6 Buffer Buffer...
Page 123: ...7 Triggering Triggering...
Page 140: ...7 18 Triggering...
Page 141: ...8 Limits Limits...
Page 149: ...9 SteppingandScanning Steppingand Scanning...
Page 168: ...9 20 Stepping and Scanning...
Page 169: ...10 AnalogOutput Analog Output...
Page 175: ...11 RemoteOperation Remote Operation...
Page 205: ...12 CommonCommands Common Commands...
Page 221: ...13 SCPISignalOriented Measurement Commands SCPISignalOri entedMeasure ment Commands...
Page 225: ...14 SCPIReferenceTables SCPIRefer enceTables...
Page 239: ...15 AdditionalSCPI Commands Additional SCPICom mands...
Page 260: ...15 22 Additional SCPI Commands...
Page 261: ...A Specifications Specifications...
Page 263: ...B Statusand ErrorMessages StatusandError Messages...
Page 268: ...B 6 Status and Error Messages...
Page 269: ...C Measurement Considerations Measurement Consider ations...
Page 278: ...C 10 Measurement Considerations...
Page 279: ...D Model182Emulation Commands Model182 EmulationCom mands...
Page 284: ...D 6 Model 182 Emulation Commands...
Page 285: ...E Example Programs ExamplePro grams...
Page 293: ...F IEEE 488 BusOverview IEEE 488Bus Overview...
Page 307: ...G IEEE 488andSCPI ConformanceInformation IEEE 488and SCPIConform anceInforma tion...
Page 310: ...G 4 IEEE 488 and SCPI Conformance Information...
Page 311: ...H Measurement Queries Measurement Queries...
Page 316: ...H 6 Measurement Queries...
Page 317: ...I Delta PulseDelta and DifferentialConductance Delta Pulse Deltaand Dif ferentialCon ductance...
