Conveter Specifications - Toshiba LQ500 Operation Manual

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conductive particles. Avoid using the density meter for the fluids like these. For details,
please contact Toshiba.
Material contacting liquid:
Main pipe: Stainless steel SCS14A (equivalent to 316SS)
Temperature detector holder: Stainless steel (SUS 316)
Applicator window : Polysulfone
Applicator window sealing material: Fluororubber (Viton)
Note: Do not apply this density meter to fluids that may corrode, deteriorate or degenerate
the above liquid contacting materials. Fore details, please contact Toshiba.
Applicators:
Temperature detector: RTD (resistance temperature detector) (Pt100)
Mounting style:

11.3 Conveter Specifications

Output signals:
Density measurement output: 4 to 20mADC (load resistance 750 Ω or less; insulated output)
Density meter fault or maintenance signal:
Semiconductor contact output capacitance 125VAC, 0.1A (resistive load)
The contact opens when in fault and closes otherwise.
* When the density meter converter is in error or in maintenance (setting change) mode,
the contact will be open.
Communication signals:
Digital signals are sent superimposed on the 4 to 20mADC signal line (based on the
HART*1 protocol).
*1 HART: Abbreviated from Highway Addressable Remote Transducer as the name of
Note: Various operations can be made from remote places by connecting the cable
Input signals
Externally synchronized input signal: No-voltage "a" contact
Use a contact with the capacitance of at least 24VDC and 1A.
This signal is used to take external synchronized operation with the flow of measured
substances including the pump operation.
Contact close: measurement implemented
Density correction factor switching signal: Voltage signal 2 points
Using this signal, the density correction factor can be changed into 4 types of values from
remote places and measurements corresponding to 4 different objects to be measured or
A pair of applicators provided for microwave reception/transmission
Vertical piping installation is recommended (Horizontal piping installation
is also possible. Refer to the Installation section.)
an industrial sensor communications protocol recommended by HCF (HART
Communication Foundation).
terminals of a communication hand-held terminal (option) to the output
terminals of 4-20mADC signal. For the specification regarding the
communication hand-held terminal, refer to the AF100 specification.
Input voltage H level: 20 to 30VDC
L level: 2VDC or less
Input resistance: Approx. 3kΩ
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