Microtemp Electrics AMT-300 User manual

4 in 1 Soil Survey Instrument
Model: AMT-300
Operation Manual

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4 in 1 Soil Survey Instrument
Model: AMT-300
Overview
AMT-300 4 in 1 soil survey instrument can test moisture of soil, PH value,
temperature and environment sunlight intensity using a probe with the length of 200mm.
The unit can easily display various readings with oversize LCD.
The unit also has low battery indication and auto power off function. It is saving
time, energy, of high efficiency. The unit assures quality of flowers and grasses planting
and garden virescence.
TOOL COMPONENTS
A. PH/ TEMP KEY------mode switch: Set the mode for PH value 、temperature or
moisture.
B. ON KEY------press the key to start the unit.
C. TEST PROBE------can test PH value 、moisture and temperature.
D. LIGHT SENSOR WINDOW------can induct sunlight intensity of measured
environment.
E. LCD DISPLAY SCREEN

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F. ℃ / ℉ OFF KEY------temperature unit switch/power off key: under temperature
mode, press the key to s elect temperature unit as ℃or ℉( original temperature
unit : ℃). Keep pressing the key for about 3 seconds to power off.
G. PROTECTING BUSHING --- Please take the protecting bushing away when using
the test probe. Put on the protecting bushing when it is not in use to protect the test
probe.
ILLUSTRATION OF DISPLAY SCREEN
A. Sunlight intensity display area------9 levels: LOW- 、LOW 、LOW+ 、NOR- 、NOR 、
NOR+ 、HGH- 、HGH 、HGH+ ，each increasing in amount and quality. LOW-
signifies an extremely dim environment. HGH+ signifies an extremely bright
environment.
B. PH function display
C. PH or temperature value display------It shows 3.5 to 9.0 for PH value and -9 ℃to
+50 ℃(16 ℉to 122 ℉) for temperature. “Lo ”or “HH ”indicates the value is out of
the measurable range.
D. Moisture display area------5 levels: DRY+ 、DRY 、NOR 、WET 、WET+ ，each
increasing in wetness. WET+ signifies an extremely wet environment while DRY+
signifies an extremely dry environment.
E. Temperature function display.
F. Low battery display------The symbol will display on the LCD continuously when the
battery is low.
HOW TO USE
Please install one 9 volt battery before use.
●BATTERY INSTALLATION
Open the battery compartment door on the back of the tool and plug one 9 volt
block battery onto the battery connector. Put the battery back to the compartment and
close the door.
●OPERATION GUIDE

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1. OPERATION FOR SUNLIGHT MEASUREMENT:
a. Press the ON button to start the unit.
b. Point the light sensor window toward max light source.
c. The current light intensity will be showed on the LCD.
Tips:
Tips:
Tips:
Tips: Please do not obstruct or cast a shadow over the light sensor.
2. OPERATION FOR PH VALUE:
a. Switch the PH/ TEMP button on the back of the unit to PH position.
b. Push the probe down as vertically as possible into the soil which needed to be
tested. Do not push the probe too near the stem to avoid damage to the
plant ’ s root.
c. Press ON button to start the unit.
d. PH value of the tested soil will be displayed on LCD.
e. Take several readings to confirm your findings.
Tips:
Tips:
Tips:
Tips:
1. Insert the probe straight up and down, about halfway between the plant
stem and the edge of the pot. For pots over 1 2 ″ in diameter, position the
probe about a third of the way between the stem and the edge of the pot.
For a deep pot, insert the probe more deeply aiming for where the heaviest
root concentration is likely to be.
2. Please softly push the probe into soil to avoid damage to the probe.
3. If the tested soil is extremely dry or too nutrient and can ’ t be tested PH
value, the user should sprinkle some water into the soil. Test again after
half an hour.
3. MOISTURE MEASUREMENT:
a. Switch the PH/ TEMP button on the back of the unit to /TEMP position.
b. Push the probe down as vertically as possible into the soil. Do not push the
probe too near the stem to avoid damage to the plant ’ s root.
c. Press ON button to start the unit.
d. Moisture of the tested soil will be displayed on LCD.
e. Take several readings to confirm your findings.
Tips:
Tips:
Tips:
Tips:
1. Insert the probe straight up and down, about halfway between the plant stem
and the edge of the pot. For pots over 1 2 ″ in diameter, position the probe
about a third of the way between the stem and the edge of the pot. For a
deep pot, insert the probe more deeply aiming for where the heaviest root
concentration is likely to be.
2. Please softly push the probe into soil to avoid damage to the probe.

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4. TEMPERATURE OF THE SOIL MEASUREMENT
a. While testing moisture, the temperature of the soil will be displayed on LCD
at the same time.
b. Press ℃ / ℉ OFF button to set the unit of temperature is ℃or ℉.
Tips:
Tips:
Tips:
Tips: If the user doesn ’ t push the probe into soil, the current environment
temperature will be displayed on the LCD.
●INTERPRET ENVIRONMENT SUNLIGHT INTENSITY READING:
Appropriate light does well in plant ’ s growth (Some plants need more light
than others).The unit has graduated the environment light and display according to
intensity, which can offer reference for your plant ’ s growth. Here is the list:
Increase in amount and quality of light
LOW- LOW LOW+ NOR- NOR NOR+ HGH- HGH HGH+
very low much slightly normal slightly much high very
●INTERPRETATION OF PH VALUES OF THE SOIL:
Extremely acid or alkaline is important factor for restricting plant ’ s growth
and feature. Most plants can ’ t grow in the soil which is extremely acid or alkaline.
By testing your soil, the user can choose plants with the correct PH or adjust PH
more accurately, effectively and economically.
PH ＝7 indicates a neutral soil
Below PH ＜7------acidic soil
Above PH ＞7------alkaline soil
Here is the list of PH value of the soil compared with acidity and alkalinity:
Out of range Out of range
Increase in acidity Neutral Increase in alkalinity
Lo 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 HH
Look up the PH reference list. If the PH reading is lower than the PH range
for your plant, then you can add lime to increase PH. If the PH reading is higher
than the PH reference range for your plant, then you can add chemicals and organics
to reduce PH.
Tips: Raising or lowering PH is not an exact science and most plants have a
reasonably wide PH tolerance. A majority of plants can survive on a PH around 6.5,
some need a particularly acid or alkaline soil.
●SOIL MOISTURE:

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Appropriate moisture does well in plant ’ s growth. The unit has graduated the
display into 5 levels, which can offer reference for your plant ’ s growth. Here is the
list:
Increase in wetness
DRY+ DRY NOR WET WET+
V ery dry dry normal wet V ery wet
If the reading is lower than that shown in the table, it ’ s time to water your
plants. If the reading is higher than that shown in the table, you do not need to water
the plants.
Check small pots more often than large ones---they dry out more quickly. Over
watering rots the roots, so do not water too frequently. Out of season, most plants
only need water once a week.
OPERATION TIPS
●The unit will be automatically off after 5 minutes disabling for electricity.
●The unit only can be used in soil, please don ’ t place the probe into water or other
solutions.
●Don ’ t leave the probe in the soil longer than necessary to avoid the possibility of
damage to the probe.
●Don ’ t bend the probe.
●Don ’ t use the probe to break up the soil.
●Don ’ t put the probe near metal objects and be sure to keep the probe away from
metal objects.
●Wipe the probe clean and dry before taking another test reading and after use.
●Before testing, please lightly shine 4 ″ -5 ″ (10-12cm)of the probe and any
oxides that may have formed on the surface of the metal.
●Insure that the probe is wiped clean and the protecting bushing is put on the test
probe before storing in order to avoid the oxidation of the probe.
●When the unit is withdrawn from the soil, remember not to grasp the probe.
●TROUBLESHOOTING:
A. Low battery: “ ” icon will be displayed on LCD, please replace the new
battery.
B. Out of range, the PH value of the unit is 3.5 to 9.0 and - 9 ℃ to +50 ℃ for
temperature.
C. Stones, organic matter had touched the probe, please wip e again and
test another place.
D. There are other metal tablet have formed on the surface of the metal after
wiped.

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E. Probe is too close to the side and/or the bottom of the pot.
F. Haven ’ t clean ed the probe before test.
G. Sample area is too dry.
H. The soil around the probe isn ’ t even.
I. Soil or potting soil is tested too soon after re-potting.
J. There is houseplant fertilizer or tablet stick near the probe.
K. Damaged probe.
CAUTIONS
CAUTIONS
CAUTIONS
CAUTIONS
●Handle with care and do not let the unit drop down.
●Do not disassemble the unit to avoid failure.
●Don ’ t place the unit with the toolbox.
●Avoid dust and water, which may stain the unit.
●Do not store the unit above 5 0 ℃ .
●Clean the unit with soft fabric.
●
Remove the battery when not in use for an extended period of time.
TECHNICAL SPECIFICATIONS
Name 4 in 1 Soil Survey Instrument
Type AMT-300
T est objects S unlight 、moisture 、PH value 、temperature
T est
range
sunlight （9 levels ）LOW- 、LOW 、LOW+ 、NOR- 、NOR 、NOR+ 、HGH- 、HGH 、HGH+
moisture （5 levels ）DRY+ 、DRY 、NOR 、WET 、WET+
PH value （12 levels ） 3.5 ～ 9.0 （ display resolution 0.5 ）
temperature -9 ℃ ～ +50 ℃(1 6 ℉ ～ 122 ℉ ) （ display resolution 1 ℃/1 ℉ ）
P ower supply O n e 9V block battery
Automatic off The unit will be automatically off after 5 minutes disabling .
Operating temperature
+5 ℃～+40 ℃
Size
M ain unit 122mm ×63mm ×36mm
T est probe φ5mm ×200mm
Weight About 70.5 g (battery not included)
WARRANTY
The product is warranted to be free from defects in materials and workmanship for
a period of one year from the date of purchase.
The warranty does not apply to the following conditions:

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●Disassembling the laser tool will void the warranty.
●Any damage resulting from, but not limited to wear, water, being dropped or repairs
attempted by others.