Toshiba LQ500 User Manual

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Density (Consistency) Meter LQ500

Introduction

The LQ500 density (consistency) meter uses
microwave phase shift technology to determine
concentrations of solids in the material to be measured
flowing through pipes. It can perform a stable and
realtime density (consistency) measurement because
this technology is not affected by flow velocity along
with fluid color, and also is not easily affected by
contaminants and low process pressure rate. As the
LQ500 has no moving parts, it is reliable and virtually
maintenance free.
Since the output of the LQ500 is theoretically linear, it
can be applied to a wide range of density (consistency)
measurement.

<Notice>
The LQ500 requires a full pipe to measure the
density (consistency). Contact Toshiba before
installation in the following cases:
<Possibility of unfilled condition>
(a) When it is installed at the discharge of a pump.
(b) When installation is horizontal, and unfilled

condition occurs inside the pipe.

(c) A process where the pipe becomes unfilled

when the operation is stopped.

Cable for power supply
(Detector/converter)

Figure

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Standard Configuration

• Density (Consistency) Meter: 1 set

(Detector and converter separate mounted)

• Accessories: 1 set (see Table 1 below)

Communication

Note 1: Need to prepare a power supply cable for the

External Sync control
contact in

DI / DO
Density (consistency

measurement output 4-20mA

C power supply

Ground resistance
100 ohm or less

Cable for communication
(Detector/converter)

1. LQ500 Configuration Diagram

ut

Table 1. Standard Accessories

Items Specifications Quantity

Power supply

cable

cable

Fuse

Document Instruction manual 1

LQ500.
Refer to the section of cable specifications at the
overall specifications in detail.

Between detector and

converter (*1)

Between detector and

converter (*1)

2A(T), 250 V

(glass tube, 5.2 dia. x 20 mm)

10 m

(32.8 ft)

10 m

(32.8 ft)

2

Figure 2. LQ500 Density (consistency) Meter

Specifications

■

Overall Specifications

Measurement method:

Microwave

Measurement

Meter size 50 mm (2”)

Span (*2) 2 to 50 %TS (*1) 1 to 50%TS (*1)

Lower limit setting

range (4 mA)

Upper limit setting

range (20 mA)

Setting increments 0.1%TS

Repeatability:

Meter size 50 mm (2”)

Repeatability ±0.02%TS ±0.01%TS

Note 1 : Above values are the results of commuting ability

Note 2 : Density (consistency) determination

Density

(consistency)

determination

repeatability

*The characteristics of sample reagent has errors due

to sample tests such as uneven density (consistency)
distribution.

*Full scale is the maximum value in the measurement

phase difference method

range:

0 to 48%TS 0 to 49%TS

2 to 50%TS 1 to 50%TS

*1 TS: Total Solids
*2 Span = Upper range – Lower range
*3 The material to be measured must be fluid

and be filled evenly with no voids.

80 to 300 mm

in the phase measurements of the converter.

repeatability for sample reagent;

Meter size

For the full

scale value of

2%TS or

greater

For the full

scale value of

less than 2%TS

50 mm

(2”)

±2%FS ±2%FS

±4%FS

80 to 300 mm

(3” to 12”)

(3” to 12”)

80 to 300 mm

(3” to 12”)

No. EJL- 106A

LQ500

range, which is the upper limit setting range.

Resolution:

(2”)

80 mm (3”)to

300 mm (12”)

80 mm (3”)to

300 mm (12”)

Meter size 50 mm (2”)

Resolution 0.002%TS 0.001%TS

Note 1: Above values are the results of commuting

ability in the phase measurements of the
converter.

Note 2: Density (consistency) determination

resolution for sample reagent;

Meter size

Density(consistency)

determination repeatability

50 mm

0.1%TS 0.05%TS

* The density (consistency) determination resolution

stated above is defined due to manufacturing
limitation to make reagents with stable distribution
and a minimum difference of fluid density
(consistency).

<Notice>

1. Install a sample tap near the LQ500 as close
as possible to get an accurate density
(consistency) measurement using the LQ500.

2. Take several samples in rapid sequence for
more accurate density (consistency)
measurement with less human error factors.

Environmental conditions:

Items Temperature range Humidity range

Standard: 0 to 50 deg.C

Detector

Converter

(32 to 122 deg.F)

Option: -20 to 50 deg.C

(4 to 122 deg.F) (*1)

0 to 50 deg.C

( 32 to 122 deg.F)

5 to 85%RH

(no condensation)

*1 A rubber heater is installed at the RF part of the

detector.
Need to prepare an additional power supply either
100Vac type or 200Vac type for it by yourself.
Determine one of them at the specification code.
This option is available for detector only.

Structure: Converter;IP65,

Detector:IP67, Watertight

Note: Outdoor installation is possible. However,

provide a sunshade for the converter section if
direct sunlight is unavoidable.

Microwave power: 10 mW
Vibration resistance:

No resonance to the following levels of
vibration:
(1) No failure for 5 to 150 Hz with the following

acceleration in each device for 30 minutes in
each axis of X, Y, and Z (90 minutes);
Converter: 4.9 m/s

2

, Detector: 25m/s2

(2) No failure for 5 to 150Hz with the following

acceleration in each device for 3 minutes in
each axis of X, Y, and Z, 10 times (90
minutes as total);
Converter: 4.9 m/s

2

, Detector: 25m/s2

Note: Avoid using the LQ500 in an environment with

constant vibration.

Cables: See the Table 2

Table 2. Cable specifications

Cables Between detector

(RF part)and converter

Specifications

Power supply

Cable type

Cross-sectional

area (*3)

Number of cores 2 5 3

Cable diameter (*4)

CVVS-2C-2S

(*1)

Communi-

(24Vdc)

2 mm

11 to 13

2

mm

cation

CVVS-5C-

1.25S

2

1.25 mm2 2 mm2

11 to 13

mm2

*1 10m (32.8 ft) length is packed as standard.
*2 Need to prepare this cable by the customer.
*3 Need to use a sheathed cable.
*4 If the diameter of the cable is smaller than the inside

diameter of the packing, enlarge the cable diameter to
the same size as the packing by wrapping around the
cable.
This dimension is coming from a diameter of the
cable gland of the LQ500.

Power
supply

cable of

LQ500 (*2)

CVV-3C-2S

11 to 13

mm2

Conformance to European Community Directives:

• EMC directive 89/336/EEC

• The low voltage 93/68/EEC

• PED 97/23/EC (Note l)

Note: See table 6 in detail.

Approved hazardous locations certification:

UL/CUL Class I, Division 2, Groups A, B, C and

D (UL/CULonly for explosion proof)

Weight: Refer to Outline Dimensions (Table 3).
Part 15 of the FCC rules: Certified.

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Detector Specifications

Meter size: 50mm (2”), 80mm (3”), 100mm (4”),

150mm (6”), 200mm (8”), 250mm
(10”), and 300mm (12”)

Flange standard and maximum working pressure:

Flange standard Maximum working pressure

ANSI Class 150 1 MPa (150 psi)

DIN10 and BS10 1 MPa (10 bar)

DIN 16 1.6 MPa (16 bar)

JIS 10K 1 MPa (10 kgf/cm2)

Note: Each product was passed a hydraulic test under

twice pressure rate for 15 minutes toward the
specification.

Fluid temperature:

0 to 100 deg.C (32 to 212 deg.F) without freezing

and bubbles conditions

Allowable fluid conductivity:

Meter size Fluid conductivity

50 mm (2”) 20 mS/cm maximum

80 mm (3”) 16 mS/cm maximum
100 mm (4”) 15 mS/cm maximum
150 mm (6”) 10 mS/cm maximum

2

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 have an 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

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

Standard type

Option type

*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.

SCS14A cast (equivalent to

316 SS) (standard) (*2, *3)

50 to 200 mm

(1/2” to 8”)

250 & 300 mm

(10” & 12”)

50 to 300 mm

(1/2” to 12”)

No buffing

Buffing # 150

Buffing # 150

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:

4-20mAdc (load resistance 750 ohm maximum,
isolated 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 4-20mAdc

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 hand-held terminal can be

used to operate the LQ500 from remote places
by connecting the AF900’s probe lead between
the LQ500’s 4-20 mA dc output signal lines.

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