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M
“M” (Mx+B scaling gain), 119
magnetic field errors, 340
mainframe
firmware revision, 146
installing a module, 20
maintenance
clearing relay count, 148
reading relay count, 147, 399
matrix switching, combining, 388
MAX annunciator, 4
maximum reading, during scan, 75
Measure key, 23, 24, 35, 36, 78
MEASure? command, 79
default settings, 201
description, 202
example, 205
range parameter, 207
resolution parameter, 207
syntax statements, 207
Measurement Complete signal, 95
measurement error, calculating, 414
measurement range
autorange, 98
command syntax, 215
overload, 98
selecting, 99
measurement resolution
“half” digit, 100
command syntax, 216
selecting, 101
vs. integration time, 103, 203
measurement speeds, scanning, 405
measurement tutorial, 333
medium ac filter, 114, 116, 361
medium timeout, 118
MEM annunciator, 4
memory
overflow, 280
reading scanned readings, 90
threshold (status register), 391
viewing alarm data, 126
viewing scanned data, 24
MEM:NSTates? command, 263
MEM:STATe:DELete command, 262
MEM:STATe:NAME command, 262
MEM:STATe:RECall:AUTO command, 263
MEM:STATe:VALid? command, 263
menus
front panel, 3, 33
summary, 35
message available, 279
message
calibration, 158
front-panel display, 144
errors, 303-318
Microsoft
®
Visual C++, 328
microwave switches, driving, 394
MIN annunciator, 4
minimum reading, during scan, 75
modem
auto answer, 274
connection to, 274
echo commands, 274
flow control mode (RS-232), 154
result codes, 274
module description
34901A, 164
34902A, 166
34903A, 168
34904A, 170
34905A, 172
34906A, 172
34907A, 174
34908A, 176
module information
connecting wiring, 20
default settings, 162
dimensions, 413
firmware revision, 146
installing in mainframe, 20
reading relay count, 147
specifications, 409
strain relief, 20
MON annunciator, 4
Mon key, 37, 94
Monitor function
definition, 93
scan on alarm, 84, 94
while scanning, 75
with alarms, 93
with Mx+B scaling, 93
multiplexer types, 378
multiplexers
errors, 381
four-wire, 58, 380
one-wire (single-ended), 58, 378
two-wire, 58, 378
VHF, 58
Mx+B key, 35, 39
Mx+B scaling
custom label, 39, 120
default gain (“M”), 121
default offset (“B”), 121
equation used, 119
interaction with alarms, 119
null stored as offset, 119
setting gain (“M”), 39, 121
setting offset (“B”), 39, 121
strain measurements, 375
valid gain (“M”) values, 120
valid offset (“B”) values, 120
while scanning, 75, 119
N
name, stored states, 48
noise caused by ground loops, 341
noise rejection, normal mode, 103
nominal impedance, cabling, 335
nominal resistance (RTD)
default, 110, 222
values, 110, 222
normal mode rejection, 103, 344, 405
NPLC, 103, 344, 405
command syntax, 218
vs. channel delays, 89
null, stored as offset (Mx+B), 119
number of bits
vs. integration time, 103, 203
number of digits, 100, 416
vs. integration time, 103, 203
numeric parameters, 300
Index
Index
427