Delta OHM HD 8706-R1, Инструкция по эксплуатации

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ENGLISH
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electrode immersed in the liquid just over the soil sediment. The con-
ductivity found must be expressed in µS/cm at the temperature of 20°C
(25°C). The salinity of the soil is calculated with the formula:
where: S = salinity of the soil in 100 gr of soil
20 (25) = conductivity expressed in µS 20°C (25°C)
The measured values allow the regulation of the dose fertilizer of in the
irrigation water.
ERROR INDICATION
OL: Overload warning.
E1: The solution used for conductivity calibration is wrong because the
slope calculating gives a value >150% of the rated value.
E2: The solution used for conductivity calibration is wrong because the
slope calculating gives a value <30% of the rated value.
E3: The temperature of the calibration solution is not between 15°C
(59°F) and 30°C (86°F). Calibration is inadmissible outside this range.
METHOD OF USE
*
Do not expose the probes to gases or liquid that could corrode the sen-
sor material. Clean the probes carefully after use.
*
Do not bend the connectors by applying upward or downward force.
*
Do not bend or deform the probes or drop the sensor for surface mea-
surements.
*
Temperature probes for surfaces must be held in vertical position to the
surface. A drop of oil or silicone grease must be applied between the sur-
face and the sensor to improve the thermal contact. Do not use water or
solvents to do this.
*
Temperature measurements on not metal surfaces require a great deal
of time due to their low heat conductivity.
*
To obtain a reliable measurement, too rapid temperature variations must
be avoided.
*
This instrument is water-resistant but not watertight, so it must not be
immersed in water. If it should fall into the water it must be taken out
immediately and checked to ensure that no water has infiltrated. The
instrument must be handled in such a way that water cannot get in at the
connector side.
0.32 • 20
S =
1000