Benetech GM900 User manual

MODEL: GM900
Infrared thermometer
Instruction manual
A. Introduction
This infrared thermometer is used for measuring
the temperature of the object's surface, which is
applicable for various hot, hazardous or hard to
reach objects without contact safely and quickly.
This unit consist of Optics, Temperature ensor
ignal amplifier, Processing circuit and LCD Display.
The Optics collected the infrared energy emitted by
object and focus onto the ensor. Then the sensor
translates the energy into an electricity signal. This
signal will be turned out to be digital shown on the
LCD after the signal amplifier and processing circuit.
B. Warning Cautions
1. Warning:
To avoid the potential situation may cause harm or
damage to people, please pay attention to the
following items:
1) Before you use this unit, check on the plastic
housing carefully. If there is any damage, do not
use it
2) Do not point laser directly at eye or indirectly off
reflective surfaces.
3) Do not use this unit in the environment of
explosive gas, steam or dusty.
2. Caution:
To avoid the damage of the unit or the target, please
protect from the following situations:
1) EMF (electro-magnetic fields) from arc welders, or
induction heaters.
2) Thermal shock caused by high temperature changes
allow 30 minutes for unit to stabilize before use.
3) Do not leave the unit on or near objects of high
temperature
2) Field of view: Make sure the target is larger than
the unit's spot size. The smaller the target the
closer measure distance. When accuracy is
critical, make sure the ta get is at least twice as
large as the spot size.
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C. Distance to Spot size
1) When take measurement, pay attention to the
D stance to pot ize. As the Distance (D)
from the target surface increases, the spot size
( ) of the area measured by the unit becomes
larger. The Distance to pot size of the unit is
12:1
***This unit is equipped with a laser, which is used for
aiming.
D. Emissivity
Emissivity, Most organic materials and painted or
oxidized surfaces have an emissivity of 0.95 (pre-set
in the unit). Inaccurate readings will result from
measuring shiny or polished metal surfaces. To
compensate, cover the target surface with masking
tape or flat black paint. Measure the tape or painted
surface when the tape or painted reach the same
temperature as the material underneath.
Material Emissivity Material Emissivity
Aluminum 0.3 Iron 0.70
Asbestos 0.95 Lead 0.5
Asphalt 0.95 Limestone 0.98
Basalt 0.70 Oil 0.94
Brass 0.5 Paint 0.93
Brick 0.90 Paper 0.95
Carbon 0.85 Plastic 0.95
Ceramic 0.95 Rubber 0.95
Concrete 0.95 and 0.90
Copper 0.95 kin 0.98
Dirt 0.94 now 0.90
Frozen food 0.90 teel 0.80
Hot food 0.93 Textiles 0.94
Glass(Plate) 0.85 Water 0.93
Ice 0.98 Wood 0..94
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E. Operation
Operating the unit：
1) Open the battery door and insert a battery properly.
2) Pull the trigger to turn on the unit.
3) Aim at the target surface and pull the trigger, then
temperature will be shown on the L D. This unit is
equipped with a laser which is only used for aiming.
Locating a Hot Spot：
To find a hot spot, aim the thermometer outside of
interest, then scan across with an up and down motion
until you locate the hot spot. (Figure 3)
F. LCD display & Buttons
1. LCD display:
a) Measurement reading
b) Measurement unit
c) Laser on icon
d) Backlight on icon
e) Battery power icon
f) Scanning icon
g) Data hold icon
h) Mode emissivity indicator
i) Data storage / read icon
j) Low temperature icon
k) High temperature icon
1) Trigger: When turn on L D display VERXX software
version for 1 sec. And turn to display reading with
scan icon. Release the trigger, Display HOLD icon.
Built in auto power off in 30 sec.
2) Laser/Back light button: When back light turn on any
operation will remain back light for 10 sec. L D
indicate on/off status.
3) - 6) Key function: Press 3key. L D subdisplay blinks
MAX-MIN-DIF-AVG-HAL-LAL-STO-EMS segment
(Only main display means normal measuring mode)
press 4key to enter
G. Maintenance
1. Lens Cleaning: Blow off loose particles using
clean compressed air. Gently brush remaining
debris away with a moist cotton swab. The
swab may be moistened with water.
2. Case cleaning: lean the case with a damp
sponge/ cloth and mild soap.
Note:
1) 1) Do not use solvent to clean plastic lens.
2) 2) Do not submerge the unit in water.
. Specification
Temperature range -50 ~ 900 C (-58 ~ 1652 F)
Accuracy
0~900C (32 ~1652F)
±1.5C (± 2.7F ) or ±1.5%
-50~0C (-58~32F) ±3C ( ±5F )
Whichever is greater
Resolution 0.1C or 0.1F
Repeatability 1% of reading or 1C
Response time 500 mSec, 95% response
Spectral response 8-14 um
Emissivity 0.10~1.00 Adjustable (0.95Preset)
Distance to Spot size 12:1
Operating Temperature 0~ 40C (32 ~ 104F)
Operating umidity 10~95%R non-condensing up to
30C (86F)
Storage Temperature -20 ~ 60C (-4 ~ 140F)
Power 9V *1 Battery
Typical battery life
(Alkaline)
Non-laser mode: 22 hrs;
Laser Models:12 hrs
Weight 222g
Dimension 175x100x50mm
MADE IN CHINA
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Figure 2
2. Buttons: Figure 3
a) MAX: Measuring maximum temperature
b) MIN: Measuring minimum temperature
c) DIF: Basic on the reading before press 4key
compute the difference of current reading
d) AVG: measuring average temperature
e) HAL: high temperature alarm, When selected HAL
press 5 keys to set high temperature alarm trigger
and confirmed by press 4 key. When reading over
trigger, L D display HI icon with BiBi audio sounds
f) LAL: low temperature alarm, When select LAL.
Press 5 keys to set low temperature trigger and
confirmed by pressing 4 keys. When reading over
trigger. L D display LOW icon with BiBi audio
sounds.
g) STO: data storage. When selected STO, lock &
DATA indicator will shown. when press 4 key. After
temperature read out press 6 key to store then
memory unit will shown. There 12 groups memory
unit available. To recall the stored data in normal
measuring mode by press 6 keys for 3 second.
h) EMS: Emissivity. Press 5 key for emissivity setting,
press 4 keys to save setup and back to normal
status
7) elsius/Fahrenheit switch: Please open battery and
push the slide switch for conversion
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