AMTAST RHS-4ATC Technical manual

Salinity Refractometer
Operation Instruction
SERIES
STYLE
MODEL
RANGE
DIVISION
SIZE
Salinity
RHS-4ATC
0~40PPT
1.000~1.030
1.0PPT
0.001
27x40x190
RHS-10ATC
0~100PPT
1.000~1.070SG
1.0PPT
0.001SG
27x40x190
RHS-28ATC
0~28%
0.20%
27x40x160
RHS-35ATC
0~35%
0.20%
27x40x160
2 IN 1
RHS-28BATC
Salinity: 0~28%
Brix: 0-32%
0.20%
27x40x160
NAME OF COMPONENTS
1.Prism 2.Cover plate 3.Calibration 4.Mirror tube 5.Eyepiece(Adjusting ring of diopter)
METHOD OF OPERATION
1. Prepare:
Aim the front end of the refractometer in the direction of a bright light, and adjust the adjusting ring of
diopter (5) until the reticle can be seen clearly.
2.Calibration:
open the cover plate (2), drop one or two drops of distilled water on the prism surface, closed cover plate,
press it lightly, then adjust the correct screw (3) to make the light/blue boundary concide with null line.
2. Measurement:
Open the cover plate (2), clean the surface of prism with a piece of soft cotton flannel, Drop 1~2 drops

of the solution to be measured. Close the cover plate, and press it lightly, then read the corresponding
scale of light and dark boundary. The reading is the salinity concentration of measured solution.
3. Storage:
After measurement, clean the surface of prism and cover plate with moist gauze, and it should be stored
carefully.
ATTENTION AND MAINTENANCE
1.Adjustment for the null liquid and specimen should be in the same temperature. Once the temperature
move greatly, the null point should be adjusted once per 30 minutes.
2.After usage, do not use water to wash the instrument, so as to avoid water entering the inside of the
instrument.
3.This is a precision optical instrument. Handle it gently and take good care of it. Do not touch or
scratch the optical surface. Please keep it in a dry, clean and non-corrosiveness environment, to prevent
the surface from turning mouldy and foggy. Please avoid strong shock during transportation.
4.If the consumers use the instrument in accordance with the mentioned method of usage, the optical
performance should not be changed.
TEMPERATURE COMPENSATION
The reference of temperature is 20°C. In operation, the temperature should be made according to the
correcting table.
ATC is mounted with Automatic Temperature Compensation, it has the extra function, it enables user
concentrate on measurements without worrying the temperature. Compensation range is 0~30oC.
ACCESSORY
1. Eyeshade;
2. Siction tube;
3. Screw driver
Amtast USA Inc.
438 Skyline Dr E Lakeland FL.33809
E-Mail: [e-mail]