Bronkhorst EL-FLOW Base 2014 - Manual (Page 26)

BRONKHORST HIGH-TECH
Customer model
Type Access Range FlowDDE FlowBus ModBus PDU
Unsigned char[16] RW  - 93 113/4 0xF120..0xF127/61729..61736
Digital instrument manufacturing configuration information string.
This string can be used by Bronkhorst High-Tech to add extra information to the model number
information.
4.1.3 Fluid Information
Next parameters give information about the fluid range of the instrument.
Fluid name
Type Access Range FlowDDE FlowBus ModBus PDU
Unsigned char[10] RW  - 25 1/17 0x8188..0x818C/33161..33165
Fluid name consists of the name of the fluid. Up to 10 characters are available for storage of this name.
Fluid unit
Type Access Range FlowDDE FlowBus ModBus PDU
Unsigned char[7] R - 129 1/31 0x81F8..0x81FB/33273..33276
The Fluid unit can be read by parameter ‘capacity unit’. This parameter contains the unit in maximal 7
characters.
Fluid Capacity (@100%)
Type Access Range FlowDDE FlowBus ModBus PDU
Float R ±1E-10… ±1E+10 21 1/13 0x8168..0x8169/33129..33130
Capacity is the maximum value (span) at 100% for direct reading in sensor base units.
Fluid Capacity (@0%)
Type Access Range FlowDDE FlowBus ModBus PDU
Float R ±1E-10… ±1E+10 183 33/22 0xA1B0..0xA1B1/41393..41394
This is the capacity zero point (offset) for direct reading in sensor base units.
4.1.4 Auto Zeroing
To start the auto zero-procedure two parameters should be written:
Control Mode
Type Access Range FlowDDE FlowBus ModBus
Unsigned int RW 0…18 12 1/4 0x0024/37
Check chapter 3.7.2, “Basic Parameters”, for available control modes.
Calibration Mode
Type Access Range FlowDDE FlowBus ModBus
Unsigned int RW  9 58 115/1 0x0E61/3682
Value Mode Instrument action
0 IDLE Idle
9 AUTO_ZERO Auto-zeroing
255 ERROR Idle
Procedure:
Step 1: Set Control Mode to CALIBRATION_MODE (9)
Step 2: Set Calibration Mode to AUTO_ZERO(9)
Step 3: Check Calibration Mode,
IDLE Auto-zeroing succeeded
AUTO_ZERO Auto-zeroing active
ERROR Auto-zeroing failed
Page 26 EL-FLOW Base Series Mass Flow Controllers 9.17.061