User`s guide

Index
355
Index
switch contact resistance, 319
switch life, 319
switch types
form C (SPDT), 73
matrix, 72
multiplexer, 71, 298
switching, errors, 301
syntax, SCPI conventions, 89
system cabling, 67, 255
system clock
factory setting, 166
setting the, 29, 166
SYSTem:ERRor? command, 216
SYSTem:PRESet command, 197
T
technical support
phone numbers 3
Web site 3
temperature coefficient, 286
temperature conversion accuracy,
265
temperature measurements
RTDs, 127
thermistors, 129
thermocouples, 124
temperature units, 123
terminal connections
ac current, 28
ac voltage, 28
dc current, 28
dc voltage, 28
frequency, 28
period, 28
resistance, 28
RTDs, 28
thermistors, 28
thermocouples, 28
wire strain relief, 27
wire strip length, 27
thermal EMF errors, 260
thermistors
connections, 28
conversion accuracy, 265
measurement tutorial, 129,
266
measurement units, 123
types supported, 28, 123
Thermocouple Check feature, 125
thermocouples
calculation error, 273
color codes, 271
connections, 28
conversion accuracy, 265
diffusion error, 272
external reference, 124
fixed reference, 124
internal reference, 124
isothermal block, 124
measurement tutorial, 267
measurement units, 123
metals used, 271
probe accuracy, 271
reference junction error, 272
reference junction, 124
shielding, 273
shunt impedance, 273
temperature range, 271
Thermocouple Check , 125
types supported, 28
thermoelectric voltages, 260
threshold, totalize, 154–156
time (clock)
factory setting, 166
setting the, 29, 166
time stamp
absolute, 104
relative, 104
timeout, low frequency, 135
torroid 259
totalize threshold, 154
hardware jumper, 315
totalizer
ac vs. TTL threshold, 154
adding to scan list, 51, 155
block diagram, 315
clearing the count, 156
contact bounce, 316
counting on falling edge, 153
counting on rising edge, 153
errors, 316
gate signal, 153, 316
manually reset, 51
maximum count, 154, 315
reading count, 51
reset mode while scanning, 92
reset mode, 51, 155
scanning, 92
Totalize Threshold jumper,
154
track mode, alarm output lines,
146
transducer types, 68
tree switch, 303
triangle brackets (< >), syntax, 89
TRIG:SOUR command, 97
TRIG:TIMer command, 97
TRIGGER command, 98
TRIGger:COUNt command, 103
triggering
buffering, 99
external, 99
scan, 96
troubleshooting
error messages, 215–238
true RMS, 280
TTL drive, digital output, 313
tutorial 253
twisted pair cables, 67
two-wire multiplexers, 71, 298
two-wire ohms, 289
34970A Refresh UG.book Page 353 Wednesday, February 17, 2010 12:34 PM