Yamatake Corporation
5-60
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter
5-11-4 :Linear/Square Root Display
Read the display to judge whether the transmitter output and the indicator display are
linear (differential pressure) or the result of extracting the square root (flow rate).
The judgement criteria based on the display are shown below:
5-11-5 :External Zero Adjustment Display
The operation status of the external zero adjustment function (option) is displayed.
The judgement criteria based on the display are shown below:
ZERO stays on for a transmitter with the external zero adjustment function.
Table 5-2 External Zero Adjustment Display Status
In the event of an error, take the necessary action, referring to "7-6-4 : Self-Diagnostic
by Indicator (option)".
For the adjustment procedure, refer to "5-12 : External Zero and Span Adjustment
(Option)".
Table 5-1 Linear/Square Root Display Status
Display
Output
Display status
Category
Linear
(Differential pressure)
Linear
(Differential pressure)
None
Linear
Square root
(Flow rate)
Linear
(Differential pressure)
DISP FLOW
Display flow rate
(Display square root)
Square root
(Flow rate)
Square root
(Flow rate)
FLOW
Flow rate
(Square root)
Adjustment status
Display
Running
ZERO
Output is increasing
UP ZERO
Output is decreasing
ZERO DOWN
Error
ZERO