Bronkhorst IQ+FLOW (from 01-07-2013) - Manual (Page 26)

Bronkhorst High-Tech B.V.
IQ+FLOW 9.17.045 26
Auto-zero procedure:
Step 1: Set 'Control Mode' to 'Calibration Mode' (value 9)
Step 2: Set 'Calibration Mode' to 'Auto zero' (value 9)
Step 3: Check 'Calibration Mode',
Idle (value 0) Auto-zeroing succeeded
Auto zero (value 9) Auto-zeroing active
Error (value 255) Auto-zeroing failed
4.2.2 Changing default control mode
Instruments are delivered with either analog or digital signal as default, depending on customer's requirement. After every (power-
up) reset the instrument will return to its default control mode. The default control mode can be changed with the following
parameter:
IOStatus
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned char RW 0…255 86 114/11 0xF258…0xF259/62041…62042
Bit 6 [7…0] represents the former analog jumper.
1 = default control mode is analog
0 = default control mode is digital
Procedure for changing default digital operation to default analog operation:
Read 'IOStatus'
Add 64 to the read value
Write 'IOStatus'
Procedure for changing default analog operation to default digital operation:
Read 'IOStatus'
Subtract 64 from the read value
Write 'IOStatus'
4.2.3 Disabling micro switch (single-channel versions only)
It is possible to disable the micro-switch on top of the instrument. This can prevent undesired use of this button. Disabling the
micro-switch can be performed with the following parameter:
IOStatus
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned char RW 0…255 86 114/11 0xF258…0xF259/62041…62042
Bit 3 [7…0] is used to disable the micro switch.
0 = micro switch disabled
1 = micro switch enabled
Procedure to enable the micro switch:
Read 'IOStatus'
Add 8 to the read value
Write 'IOStatus'
Procedure to disable the micro switch:
Read 'IOStatus'
Subtract 8 from the read value
Write 'IOStatus'