REED ST-8835 User manual

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Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
Model ST-8835
Non-Contact Infrared
Thermometer
Instruction
Manual

reedinstruments
www com
2
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
Table Of Contents
Introduction ................................................................................................ 2
Features...................................................................................................... 3
Applications................................................................................................ 3
Safety ......................................................................................................... 3
Distance & Spot Size.................................................................................. 4
Specications..........................................................................................4-5
Front Panel Description.............................................................................. 6
Indicator ..................................................................................................... 6
Buttons....................................................................................................... 7
Measurement Operation............................................................................. 8
How to Obtain Emmissivity? ...................................................................8-9
Data Logger...........................................................................................9-10
Battery Replacement................................................................................ 10
Notes...................................................................................................11-12
Maintenance & Cleaning .......................................................................... 12
Introduction
Thank you for your purchase of this REED Infrared Thermometer. This
instrument offers non-contact (infrared) temperature measurement
capability. The built-in laser pointer increases target accuracy while
the backlight LCD and handy push-buttons combine for convenient,
ergonomic operation. Type K thermocouple functionality is also built-in.
Proper use and care of this meter will provide years of reliable service.

reedinstruments
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3
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
Features:
• Precise non-contact temperature measurement
• Type K temperature measurement
• Uniqueatsurface,modernhousingdesign
• Built-in laser pointer
• Automatic Data Hold
• Automatic power off
• °C/°F switch
• Emissivity, digitally adjustable from 0.10 to 1.0
• MAX, MIN, DIF, AVG record
• Data Logger (LOG)
• LCD with backlight
• Automatic range selection
• Resolution 0.1ºC (0.1ºF)
• Trigger lock
• High and Low alarms
• Measure emissivity
Applications:
Foodpreparation,safetyandreinspectors,plasticmolding,asphalt,
marine and screen printing, measure ink and dryer temperature, HVAC/R,
diesel,eetmaintenanceandmuchmore.
Safety
• Use extreme caution when the laser beam is turned on.
• Do not let the beam enter your eye, another
person’s eye or the eye of an animal.
• Becarefulnottopointthebeamoffareective
surface and strike your eye.
• Do not allow the laser light beam to impinge on
any gas which can explode.

reedinstruments
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4
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
Distance & Spot Size
As the distance (D) from the object increases, the spot size (S) of the area
measured by the unit becomes larger. The relationship between distance
and spot size for each unit is listed below. The focal point for each unit is
914mm (36”). The spot sizes indicate 90% encircled energy.
Specifications:
TK measurement:
TK Temperature Range -50 to 1370°C (-58 to 2498°F)
Resolution -50 to 1370°C 0.1°C
-58 to 1999.9°F 0.1°F
2000 to 2498°F 1°F
Accuracy -50 to 1000°C ±1.5% of reading +3°C (+5°F)
1000 to 1370°C ±1.5% of reading +2°C (+3.6°F)
IR Measurement:
IR Temperature Range -50 to 1050°C (-58 to 1922°F)
Distance : Spot size 30:1
Resolution 0.1°C (0.1°F)
Accuracy -50 to -20°C (-58 to -4°F) ±5°C (±9°F)
-20 to 200°C (-4 to 392°F) ±1.5% of reading +2°C (+3.6°F)
200 to 538°C (392 to 1000°F) ±2.0% of reading +2°C (+3.6°F)
538 to 1050°C (1000 to 1922°F) ±3.5% of reading +5°C (+9°F)

reedinstruments
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5
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
Specifications con’t:
Response Time: Less than 1 second
Spectral Response: 8~14um
Emissivity: Digitally adjustable from 0.10 to 1.0
Over Range Indication: LCD will show “-0L”,”0L”
Polarity: Automatic (no indication for positive polarity);
Minus (-) sign for negative polarity
Diode Laser: Output <1mW, Wavelength 630~670nm,
Class 2 (II) laser product
Operating Temp.: 0 to 50°C (32 to 122°F)
Storage Temp.: –20 to 60°C (-4 to 140°F)
Relative Humidity: 10%~90% RH operating, <80%RH storage
Power Supply: 9V battery, NEDA 1604A or IEC 6LR61,
or equivalent
Dimensions: 100 x 56 x 230mm (3.9 x 2.2 x 9.0”)
Weight: 290g (10.2 oz)
Safety: “CE” Comply with EMC
Notes:
• Accuracy: Given at 18 to 28°C (64 to 82°F), less than 80% RH.
• Field of View: Make sure that the target is larger than the unit’s spot
size. The smaller the target, the closer you should be to it. When
accuracy is critical, make sure the target is at least twice as large
as the spot size.

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6
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
Front Panel Description
1- IR Sensor
2- Laser Pointer Beam
3- LCD Display
4- Down Button
5- Up Button
6- Mode Button
7- Laser/Backlight Button
8- Measurement Trigger
9- Handle Grip
10- Battery Cover
Indicators
1- Data Hold
2- Measuring indication
3- Emissivity symbol & value
4- °C/°F symbol
5- Auto Emissivity
6- Lock & Laser “ON” symbols
7- High & low alarm symbols
8- Temperature values for the MAX, MIN, DIF, AVG HAL, LAL.TK and
LOG
9- Symbols for EMS MAX, MIN, DIF, AVG, HAL, LAL ,TK and LOG
10- Current temperature value
11- Low battery

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7
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
Buttons
1- Up button (for EMS,HAL,LAL,LOG)
2- MODE button (for cycling through the
mode loop)
3- Down button (for EMS,HAL,LAL,LOG)
4- Laser/Backlight On/Off button (pull trigger
and press button to activate laser/backlight)
MODE Button Function
This infrared thermometer measures Maximum (MAX),
Minimum (MIN), Differential (DIF), and Average (AVG) Tem-
peratures. Each time you take a reading, this data is stored
and can be recalled with the MODE button until a new
measurement is taken. When the trigger is pulled again,
the unit will begin measuring in the last mode selected.
Pressing the MODE button also allows you to access
the High Alarm(HAL), Low Alarm(LAL),Emissivity(EMS)
and data logger(LOG).
MODE - Each time you press MODE, you advance
through the mode cycle. Pressing the MODE button
also allows you to access the Type K Temperature
Measurement.
The diagram on the left shows the sequence of
functions in the MODE cycle
Switching C/F, LOCK ON/OFF & SET ALARM
1- C/F
2- LOCK ON/OFF
3- SET ALARM
Select the temperature units (°C or °F)
by using the°C/°F switch

reedinstruments
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8
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
To lock the unit on for continuous measurement, slide the middle switch
LOCK ON/OFF to the right. If the trigger is pulled while the unit is locked
on, the laser and backlight will be turned on if they have been activated.
When the unit is locked on, the backlight and laser will remain on unless it
is turned off using the Laser/Backlight button on the keypad.
To activate the alarms, please slide the bottom switch SET ALARM
to the right.
To set values for the High Alarm (HAL), Low Alarm (LAL) and Emissivity
(EMS),rstlyactivatethedisplaybypullingthetriggerorpressingthe
MODE button, then press the MODE button until the appropriate code
appears in the lower left corner of the display, press the UP and DOWN
buttons to adjust the desired values.
Measurement Operation
1) Hold the meter by its handle grip and point it toward the surface
to be measured.
2) Pull and hold the trigger to turn the meter on and begin testing.
The display will light if the battery is good. Replace the battery
if the display does not light.
3) While measuring, the SCAN display icon will appear in the upper left
corner of the LCD.
4) Release the trigger and the HOLD icon will appear on the LCD
indicating that the reading is being held.
5) The meter will automatically power off approximately 7 seconds after
the trigger is released. Unless the unit is locked on.
How to obtain Emissivity?
In the EMS mode, press and hold the Laser/Backlight button until
the “EMS” icon on the left side of LCD blinking. At this time, “
3
= --”
will appear at the upper side of the LCD; IR temperature value will be in
the middle of LCD; and Type K temperature value is at the lower side of
the LCD.

reedinstruments
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9
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
How to obtain Emissivity? con’t
Contact the Type K probe to the object surface and test the temperature
of same point with IR measurement. After both values are stable, press
UPorDOWNbuttonforconrmation.Then,emissivityoftheobjectwillbe
shown at the upper side of the LCD.
Press MODE button or trigger to enter normal measurement.
Notes:
1. When the IR value is not corresponding to the TK value, or IR and TK
tested the different points, no emissivity will be obtainable or a wrong
emissivity will be obtained.
2. The temperature of the target should be higher than the environment
temperature. Normally, 100°C is suitable for obtaining a higher accuracy
emissivity. After obtaining the emissivity, if the difference between the IR
value (in the middle of LCD) and TK value (at the lower side of LCD) is
too big, the obtained emissivity will be incorrect. It’s necessary to obtain
a new emissivity.
Data Logger
Storing Data
Your thermometer is capable of storing up to 20 data locations. The
infrared temperature and temperature scale (°C or °F) are also stored.
Infrared
To store data from an infrared reading, pull the trigger. While holding the
trigger, press the MODE button until LOG appears in the lower left corner
of the display; a log location number will be shown. If no temperature has
been recorded in the shown LOG location, 4 dashes will appear in the
lower right corner. Aim the unit at the target area you want to record, and
press the laser/backlight button. The recorded temperature will appear
in the lower right corner. To select another log location, press the up and
down keys.

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10
Pantone 485 & 123
485 = (0/100/100/10)
123 = (0/18/100/0)
Recalling Data
To recall stored data after the unit shuts off, press the MODE button until
LOG appears in the lower left corner. A LOG location number will be shown
below LOG, and the stored temperature for that location will be displayed.
To move to another LOG location, press the UP and DOWN keys.
Log Clear Function
The “Log clear” function allows you to quickly clear all logged data points.
This function can only be used when the unit is in LOG mode. It can be
used when the user has any number of LOG locations stored.
You should only use the “LOG clear” function if you want to clear all the
Log location data that is stored in unit’s memory. The “LOG clear” function
works as follows:
1. While in LOG mode, press the trigger, and then press the “down” arrow
button until you reach LOG location “0”. This can only be done when
the trigger is pulled. LOG location “0” cannot be accessed by using the
“up” arrow button.
2. When LOG location “0” shows in the display, press the laser/back-
light button. A tone will sound, and the LOG location will automatically
change to “1”, signifying that all data locations have been cleared.
3. Measurement considerations:
Holding the meter by its handle, point the IR sensor toward the object
whose temperature is to be measured. The meter automatically com-
pensates for temperature deviations from ambient temperature. Keep
in mind that it will take up to 30 minutes to adjust to wide ambient
temperatures being measured followed by high temperature measure-
ments, some time (several minutes) is required after the low (and before
the high) temperature measurements are made. This is a result of the
cooling process, which must take place for the IR sensor.
Battery Replacement
1.Whenbatterypowerisnotsufcient,LCDwilldisplay“
Replacement with one new 9V battery is required.
2. Open battery cover, take out the battery from the instrument and replace
with a new 9V battery and place the battery cover back into place.