Instruction Manual
MX7M Active Gauge
3.3 RS-485 and USB Command List
Table 6: RS-485 and USB General Read Commands
Command
Response
Description
R1
xx
Read units, where xx is:
PA = Pa
TR = Torr
MB = mbar
R3
xx
Read resolution, where xx is:
LO = low
HI = high
R5
xyzzabb
Read analog output range, where:
x = 1 (linear), 2 (log), 3 (linear-by-decade),
4 (linear-by-decade 7F)
y = high value exponent sign
zz = high value exponent
a = low value exponent sign
bb = low value exponent
R6
xx
Read gas type, where xx is:
N2 = Nitrogen
AR = Argon
H2 = Hydrogen
HE = Helium
NE = Neon
KR = Krypton
C2 = Carbon Dioxide
R7Y
ppseePPSEE
Read SPL (ppsee) and SP2H (PPSEE) settings
Y =1 (Open Collector)
Y =2 (Relay)
R8
x
Read sensor voltage control, where x is:
1 = menu control
2 = pin control
R10
x
Read high voltage state, where x is:
0 = off
1 = on
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mx7m_im rev C
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