LQ500
200 mm (8”) | 8 mS/cm maximum |
250 mm (10”) | 8 mS/cm maximum |
300 mm (12”) | 6 mS/cm maximum |
Note 1: The LQ500 can not havean accurate density (consistency) measurement when it is over the specification according to reduce the microwave signal.
Note 2: The LQ500 density (consistency) measurement for application where liquids containing highly conductive particles such as active carbon and metal particles may be affected. Consult Toshiba for detail when the measuring liquid contains such particles.
Wetting materials:
Name | Materials (*1) | |
Main pipe | SCS14A cast (equivalent to | |
316 SS) (standard) (*2, *3) | ||
| ||
Temperature detector sheath | 316 stainless steel (*4) | |
Applicator window | Polysulfone (*4) | |
Applicator window sealant | Fluoric rubber |
*1 Avoid using the LQ500 for applications where harmful liquids that cause corrosion, deterioration, or changes in quantity for the wetting materials are used. Make sure all materials at these wetting parts that are suitable for your CIP or not before cleaning.
*2 The smoothness inside the pipe on this material is;
Type | Meter size | Smoothness | |
| 50 to 200 mm | No buffing | |
Standard type | (1/2” to 8”) | ||
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250 & 300 mm | Buffing # 150 | ||
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| (10” & 12”) | ||
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Option type | 50 to 300 mm | Buffing # 150 | |
(1/2” to 12”) | |||
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*3 State the wetted materials when you choose these options.
*4 The materials of them are changed for abrasive applications.
Need to choose the specification code for this application.
Applicator:
Serves as an antenna to send and receive microwave signals, one set provided.
Temperature detector: RTD (Pt100)
Fitting:
Direct fitting to vertical or horizontal piping. (Refer to the section of Piping Precautions.)
■Converter Specifications
Output signals
•Density (consistency) measurement output:
•Density (consistency) fault or Maintenance signal: 125Vac, 0.1A (resistive load) solid state contact; opens when an error occurs in the converter or when the LQ500 is in the setting change mode, otherwise the contact remains closed.
Communication signal:
Digital signal is superimposed on
current signal (conforming to HART protocol(*1)). Load resistance:240 to 750 ohm
Load capacity:0.25μF maximum
*1 HART (Highway Addressable Remote Transducer) protocol is a communications protocol for industrial sensors recommended by HCF (HART Communication Foundation).
Note: The optional AF900
Input signals
•External synchronized input signal: In order to avoid problems of density (consistency) measurement such as inhomogeneous condition caused by discontinuous process operation and empty pipe condition caused by stopping process operation. <Specification>
One dry “make” contact;
Contact capacity of 24Vdc with 0.1 to 2.0A is required.
This contact signal can be used to start or stop density (consistency) measurement in synchronization with an external contact, such as the contacts on a pump.
The measurement starts or stops as follows: Contact closed: Starts density (consistency) measurement.
Contact open: Stops density (consistency) measurement.
•Density multiplier switching signal:
In order to achieve selecting up to 4 kinds of liquid concentration measurement independently as maximum.
<Specification>
Two voltage signals described below are required: Input voltage: H level: 20 to 30 Vdc
L level: 2 Vdc or less
Input resistance: Approx. 3k ohm
•Conductivity correction signal:
Need to prepare an additional conductivity meter when using this function. Install in where is able to have a stable and accurate measurement.
<Specification>
Input signal: 4 to 20mAdc
Conductivity range: 0 to 10mS/cm
Update period for density (consistency) measurement output and display:
Approx. 1 second
Functions by software as standard:
•Data saving function:
In order to save measurement data into the memory of converter temporary.
The oldest data is overwritten. <Specification>
Data storage points: 256 points maximum.
Period: 1 to 1,800 minutes (1 minute each). ex 1: The data is saved for approx. latest 4.26
hours when programming every minute. ex 2: The data is saved for approx. latest 21.3
3
