ZHYQ GND15 User manual
The Intrinsically safe In-line Refractometer GND15(B) it designed to detects the Refractive Index of a sample and
outputs the Brix(%) value on the display , can also transmit measured data to external devices via 4 to 20mA or
RS485 . GND15(B) series has the function of automatic temperature compensation according to the temperature
of the tested medium , when the tested medium temperature changes , the Brix value ( soluble solids ) after
temperature compensation is displays and the output changes accordingly.
Thank you for purchasing our Intrinsically safe In-line Refractometer. This instruction manual is designed to guide
you to understand the functions and characteristics of the sensor. Before using the instrument, please read this
manual carefully to ensure safe and correct use. Please keep this manual for future reference
In-line Refractometer
(Intrinsically safe type)
Model : GND15 (B)
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Description
GND15(B) Intrinsically safe In-line Refractometer, which is composed of light source, sapphire refraction, light
receiver and signal modulation circuit. The light source emits a stable light signal through the sapphire to contact
the measured medium, and the concentration of the measured medium produces a corresponding signal. The
optical receiver calculates the refractive index of the collected refracted light source to obtain the corresponding
concentration through the data algorithm. Since the concentration will be affected by temperature, internal
temperature calibration is adopted to reduce the influence of temperature drift.
The measuring principle diagram as below:
Automatic temperature compensation
Sturdy and durable, compact and easy to install
Easy to operate, easy to connect with other devices for automatic control
Inline real-time monitoring and control of liquid substance concentration in various industries
The GND15(B) intrinsically safe concentration meter is mainly used for the preparation and detection of the
weight percentage concentration of the cooling and cooling emulsion in the machining industry and the M-10 and
MDT emulsions commonly used in mines. It provides convenience for safe and economical preparation of
emulsions. The method is widely used in mechanical processing, mining selection, underground support and
other fields. It is used to detect the weight percentage concentration of water-soluble mine emulsion, which
provides great convenience for accurately preparing emulsion-pressed liquefied liquid.
Working Principle
Applications
Features
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Measure Parameters:
Refractive index(nD), Brix (%)
Measure range:
0-15% , 0-33% , 0-53% , 93%
Min Resolution Ratio:
Brix: 0.1% ( Range for 15% , 33% & 53% )
Brix: 0.5% ( Range for 93% )
Measurement Accuracy:
Brix:±0.1%,
Brix:±0.3% (standard )
Measurement Temperature:
0-85℃(Automatic Temperature Compensation)
Operating current:
≤200mA
Output :
4-20mA , 4-20mA+ RS485 optional
Process connection
Our standard is 3” tri-clamp
Power:
12-24V DC
Wetted parts material:
Prism: sapphire, Prism stage: SS304 , SS316L (can be customized)
Environment Temperature:
0-40℃
Protection grade:
IP67
Electrical connection
Directly cable
Cable length
2M ,3M ,5M,10M are optional
Technical Specifications
Dimensions
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Choose a good installation site for easy maintenance and operation, and try to avoid adverse environment
damage to the densitometer and impact on the measurement. Its common requirements are as follows:
◆There is enough space around for easy maintenance and adjustment
◆Protected from direct sunlight and strong heat sources
◆Places that are not easily collided
◆Easy wiring and installation
Black electronic wire: GND
Red electronic wire: +12VDC
Blue electronic wire: 4~20 output +
Yellow electronic wire: 4~20 output -
White electronic line: calibration wire
Brown electronic wire: calibration wire
PS: Transmission wires should not be passed through conduits or open conduits with other power wires, nor
should they be passed near high-power equipment.
Product connect with the user’s equipment
Installation
Wiring
Operation and using
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1. When there is no signal output from the concentration meter, firstly check the disconnection or short circuit of
the extension cable or whether the working voltage of the concentration meter is normal
2. If the concentration meter is suspected to be malfunctioning, the following methods can be used
Remove the densitometer, measure water and a certain concentration of medium respectively, measure with the
mA current of the multimeter, blue electronic wire: 4~20 output positive and yellow electronic wire: 4~20 output
negative, the current signal should be 4mA, and the measured The current output corresponding to the medium
is normal, otherwise the concentration meter is faulty.
Periodic/timed maintenance (operable by cleaning unit)
PS: we can also supply Auto or manual washing device for optional, if you need, Please let us know
when order.
Wipe the glass of the densitometer probe clean, add 0.3mL of tap water, if the test value is not equal to 4mA,
short-circuit the zero line to clear it.
Concentration meters measuring high temperature, corrosive media or operating under vibration conditions
should be calibrated once every six months.
After the concentration meter has been running for 5 years, an insulation resistance test should be performed,
and the insulation resistance should be above 500MΩ.
Concentration value vs. Refractive Index graph
Normal troubleshooting
Maintenance
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with * are required, with --- is optional
Model
Range
(%)
Output
Process
connection
Electric
connection
Accuracy
Other requirement
GND15 (B)
*
*
*
*
*
---
Example: GND15(B)-15%-4-20mA-3” tri-clamp- Directly cable -0.5%FS
5-6F No.8 Building No.115 ,Lane 1276 Nanle Road Songjiang District Shanghai 201600 China
Tel:+86-21-51691919 67755189 Fax:+86-21-67755185
E-mail: [email protected]
www.zhyqsensor.com
Shanghai Zhaohui Pressure Apparatus Co.,
Ltd.
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Ordering guide:
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