Universal Flow Monitors FlowStream FD Series User Manual page 15

 Gas number: 1 Byte
Gas Name
Air
Argon
Carbon Dioxide
Helium
Hydrogen
Methane
Nitrogen
Oxygen
User Factor
 Flow: 2 Bytes
Flow in SCFH or SLPM transmitted as Flow x 10 (depends on the units selected on the
LCD)
 Status: 1 Byte
Engineering units – Bits 7, 6: (depends on the units selected on the LCD)
00 = SCFH
01 = SLPM
10 = SCCM
Bits 5, 4, 3 are zeros (reserved)
Sensor status – Bits 2, 1, 0:
Bit 0: AP sensor (0=okay, 1=failed)
Bit 1: DP sensor (0=okay, 1=failed)
Bit 2: Temperature (0=okay, 1=failed)
 Temperature: 2 Bytes
Gas temperature in °C or °F transmitted as Temperature x 10 (depends on the units
selected on the LCD)
 Pressure: 2 Bytes
Pressure value in PSIA transmitted as Pressure x 10
 Flow alarm – 1 Byte
0 = No alarm
1 = High alarm
2 = Low alarm
 Totalizer – 4 Bytes
It is transmitted as Total x 100. Maximum value is 999999, transmitted as 99999900
(units depends on what is selected on the LCD).
 Gas Factor Value – 2 Bytes
 Padding Bytes – 4 Bytes
Default all zeroes. Reserved for future implementation.
FDMAN-1-190214
Number
0
1
2
3
4
5
6
7
255
Page 15