Operation of the Transmitter 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
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