HELIX GRANVILLE-PHILLIPS Convectron ATM Instruction Manual page 94

Index
P
Parity for RS-485 module 43
Piezo resistive diaphragm sensor 79
Potentiometers
Convectron ATM adjust 16, 35
Convectron VAC adjust 16, 36
Diaphragm ATM zero adjust 16, 37
setpoint 1 adjust 16, 28
setpoint 2 adjust 16, 32
Power supply 74
Precautions for troubleshooting 61
Pressure
appropriate graphs for reading 45
appropriate graphs for true versus indicated 49
atmospheric at altitude/Torr/voltage
relationships 35
reading true values 46–48
relief devices 7
setting and reading RS-485 units 55
true versus indicated 23–25, 46–48
values and units 55
versus analog output voltage 19–22
Protocol for RS-485 module 77
R
Radio frequency interference (RFI) 14
Reading setpoints
analog 34
RS-485 53
Relief devices 7
Returning a damaged module 70
RS-485 commands 43–44
address 42
baud rate 44
factory defaults 58
firmware version 57
pressure units, reading 55
pressure units, sending 55
process control, calibration, and set 59
read 60
response time 44
structure 43
summary 59–60
86
RS-485 module
components 6
digital format 77
dimensions 75
error responses 43
factory default settings 58
front panel 40
front panel features 41
operation 39–60
operation below 10
optional display 55
output from 45
parity 43
physical characteristics 75
power supply 74
preparing to operate 39
protocol 77
reading setpoint relay status 54
setpoint relay assignments, programming 53
setpoint relay assignments, reading 53
setpoint relays 45
specifications 77
temperature ratings 73
troubleshooting error messages 65, 66
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Convectron ATM Vacuum Gauge Module Instruction Manual
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Torr 57