Keithley 3720-ST User Manual

Section 11: TSP command reference Series 3700A System Switch/Multimeter Reference Manual
11-194 3700AS-901-01 Rev. D/June 2018
dmm.func = "dcvolts" -- set the DMM for DC volts functionality
dmm.reset("active") -- reset DC volts to default settings
dmm.range = 10 -- set the range to 10 volts
dmm.nplc = 0.1 -- set the nplc to 0.1
dmm.limit[1].autoclear = dmm.OFF -- disable auto clearing for limit 1
dmm.limit[1].high.value = 5 -- set high limit on 1 to fail if reading
-- exceeds 5 volts
dmm.limit[1].low.value = 3 -- set low limit on 1 to fail if reading
-- is less than 3 volts
dmm.limit[1].enable = dmm.ON -- enable limit 1 checking for DC volt
-- measurements
dmm.limit[2].autoclear = dmm.OFF -- disable auto clearing for limit 2
dmm.limit[2].high.value = 7 -- set high limit on 2 to fail if reading
-- exceeds 7 volts
dmm.limit[2].low.value = 1 -- set low limit on 2 to fail if reading
-- is less than 1 volts
dmm.limit[2].enable = dmm.ON -- enable limit 2 checking for DC volt
-- measurements
dmm.measurecount = 50 -- set the measure count to 50
LimitBuffer = dmm.makebuffer(100) -- create a reading buffer that can store
-- 100 readings
dmm.measure(LimitBuffer) -- take 50 readings and store them in
-- LimitBuffer then check if any
-- of the 50 readings were
-- outside of the limits
print("limit 1 high fail = " .. dmm.limit[1].high.fail)
print("limit 1 low fail = " .. dmm.limit[1].low.fail)
print("limit 2 high fail = " .. dmm.limit[2].high.fail)
print("limit 2 low fail = " .. dmm.limit[2].low.fail)
dmm.limit[1].clear() -- clear limit 1 conditions
dmm.limit[2].clear() -- clear limit 2 conditions
Sample output that shows all readings are within limit values (all readings between 3 and 5 volts):
limit 1 high fail = 0
limit 1 low fail = 0
limit 2 high fail = 0
limit 2 low fail = 0
Sample output showing at least one reading failed limit 1 high values (a 6 volt reading would cause this
condition or a reading greater than 5 but less than 7.):
limit 1 high fail = 1
limit 1 low fail = 0
limit 2 high fail = 0
limit 2 low fail = 0
Sample output showing at least one reading failed limit 1 and 2 low values (a 0.5 volts reading would cause
this condition or a reading less than 1):
limit 1 high fail = 0
limit 1 low fail = 1
limit 2 high fail = 0
limit 2 low fail = 1
Also see
digio.trigger[N].stimulus (on page 11-122)
dmm.configure.recall() (on page 11-165)
dmm.configure.set() (on page 11-166)
dmm.func (on page 11-179)
dmm.limit[Y].enable (on page 11-184)
dmm.limit[Y].high.value (on page 11-189)
dmm.limit[Y].low.fail (on page 11-191)

Keithley 3720-ST Specifications

General

Brand	Keithley
Model	3720-ST
Category	Multimeter
Language	English