Sper scientific 801038 User manual

1
WBGT Meter
with Color-Coded
LCD Alerts
801038
Instruction Manual

2
TABLE OF CONTENTS
INTRODUCTION ...........................................2
FEATURES.....................................................3
MATERIAL SUPPLIED ..................................3
FRONT PANEL DESCRIPTION ...................4
LCD DISPLAY ................................................5
SET UP ...........................................................6
CALIBRATION ...............................................9
MEASUREMENT PROCEDURES..............10
CARE AND MAINTENANCE.......................14
SPECIFICATIONS .......................................15
WARRANTY .................................................16
INTRODUCTION
This Sper Scientic multi-functional WBGT
heat stress meter (model 801038) provides a
simple, color coded WBGT value on a large LCD
display. This meter takes the guesswork out of
heat stress calculations by translating the OSHA
WBGT guidelines into a simple color-coded
system. In addition to providing all the necessary
environmental conditions on a single screen, this
visual alert system can be seen at a distance
allowing management and workers to be instantly
aware when the heat index enters potentially
dangerous zones. These features, combined with
the optional audible alarm help to mitigate the risk
of heat-related injuries in the workplace.

3
FEATURES
• Calculates Heat Index value for
Shaded Conditions
• Calculates Heat Stress value for Direct
Sunlight Conditions
• Tripod Mounting for Hands-free operation
• Rugged housing
• Maximum and Minimum values
• Data Hold Function
• Protective sleeve for safe transportation
• Optional Audible alarm
MATERIALS SUPPLIED
• WGBT meter
• Instruction manual
• 4 AAA batteries

4
FRONT PANEL DESCRIPTION
1. Black Globe (Brass)
2. Sensor Protective sleeve
3. LCD Display
4. SET Button
5. IN/OUT Button/UP Arrow
6. HOLD Button/DOWN Arrow
7. MIN/MAX/ESC Button
8. TA/TG Button
9. POWER Button
1
2
3
4
5
6
9
8
7

5
LCD DISPLAY
1. Audible Alarm Indicator
2. Temperature Units
3. WBGT Value
4. Ambient Relative Humidity Value
5. Low Battery Indicator
6. Hold Data Indicator
7. Auto power-o󰀨 Indicator
8. Air Temperature/Globe Temperature Value
9. Air Temperature/Globe Temperature Selection
10. Minimum/Maximum Selection
11. IN/OUT Selection
1
11
10
9
8
7
2
3
4
5
6

6
SET UP
Battery Installation
This meter uses four AAA batteries. To install the
batteries before rst use:
1. Locate the battery door on the back of
the meter.
2. Push the tab inward to remove the door
3. Insert four new AAA batteries, ensuring
correct polarity.
4. Replace the battery cover by rst inserting
the two plastic tabs into the meter and then
pressing the door down until it clicks.
Replace the batteries when the low-battery icon
blinks on the LCD.
Note…
Before replacing the batteries, turn the meter o󰀨.
Meter On and O󰀨
1. Press POWER to turn the meter on/o󰀨.
2. The meter will automatically turn o󰀨 after twenty
minutes of inactivity.

7
Disabling the Automatic Power-O󰀨 Function
1. Ensure the meter is turned o󰀨.
2. Simultaneously press POWER and HOLD for
3 seconds.
3. The meter will beep and the letter n will
appear on the screen. This indicates that the
function has successfully been disabled.
4. After the meter is turned o󰀨, it will return to
Auto power-o󰀨 mode. This is indicated by APO
in the lower left quadrant of the LCD screen.
Temperature Unit Selection
1. With the meter turned on, press and hold the
SET button for more than three seconds to
enter the SETUP mode.
2. Using the UP and DOWN arrows, scroll
through the settings until UNT appears on
the screen.
3. Press SET to enter this function.
4. Use the UP and DOWN arrows to select °C
or °F.
5. Press SET once to conrm your selection.
6. Press MIN/MAX/ESC to exit setup mode

8
Setting the Audible Alarm
1. With the meter turned on, press and hold
SET for more than three seconds to enter the
SETUP mode.
2. Using the UP and DOWN arrows, scroll
through the settings until ALA appears on
the screen.
3. Press SET to enter this function.
4. Use the UP and DOWN arrows to select
whether the audible alarm is O󰀨 or On.
5. Press SET once to conrm your selection.
6. The meter will now display a blinking
numerical value.
7. Using the UP and DOWN arrows, set this value
to the minimum heat index/heat stress value
you would like to trigger the alarm.
8. Press SET once to conrm your selection.
9. Press MIN/MAX/ESC to exit setup mode and
return to normal operation.

9
CALIBRATION
This meter comes Factory calibrated and
can sustain rigorous use without the need for
recalibration. Calibration must be performed in
a controlled temperature/humidity chamber in a
laboratory environment. Self-calibration is not
recommended. Sper Scientic o󰀨ers calibration
service for this meter at www.sperdirect.com.

10
MEASUREMENT PROCEDURES
For Indoor and Outdoor Shade
1. Press IN/OUT until the word IN is displayed
on the screen.
2. The meter will now provide readings relevant to
shaded conditions on the LCD screen.
For Direct Sunlight Conditions
3. Press IN/OUT until the word OUT is displayed
on the screen.
4. The meter will now provide readings relevant to
full sun conditions on the LCD screen.
Data Hold
All real time measurements for the meter,
including automatic color changing of the screen,
are disabled during data hold. The data hold
function does not override the automatic power-
o󰀨 function.
1. Press HOLD to freeze the reading on the
display. “Hold” appears at the top of the LCD
and the reading remains on the display until
hold is disabled.
2. Press HOLD to return to Normal Mode.

11
Min/Max Mode
1. In Normal measuring mode, press MIN/
MAX/ESC to scroll through the minimum and
maximum values for all values from the time
the meter was last turned on.
2. Press TA/TG to toggle between the Minimum
and Maximum Air and Globe Temperatures.
3. Press IN/OUT to toggle between the Minimum
and Maximum calculations for Sun and shaded
WBGT values.
4. To clear the Minimum and Maximum values,
Press POWER to turn the meter o󰀨.

12
Using the Color-Code Function
Note…
The meter defaults to a color-changing display
based on the surrounding conditions when it is
turned on. The meter will change color according
to the following table. The screen will show
no color if the conditions are below the OSHA
guidelines for possible heat injury. However, if
you have set an audible alarm as described on
page 8, the display will blink if the WBGT value
exceeds this value, regardless of whether or not
the audible alarm is turned on.

13
WBGT Value (°C)
WBGT Value (°F) Backlight Color Risk of heat injury*
Less than 26.7°C
Less than 80.1°F Gray (no color) No Risk
26.7 – 29.3°C
80.1 – 84.7°F Green Low Risk
29.4 – 31.0°C
84.9 – 87.8°F Amber Light Risk
31.1 – 32.1°C
88.0 – 89.8°F Red Moderate Risk
32.2°C and above
90.0°F and above Flashing Red High Risk
* IMPORTANT NOTE: The table above is based on OSHA guidelines, but is NOT intended to replace any regulation set forth by OSHA or any other Regulatory Authority. It is the responsibility of the user to remain up-to-date on all regulations for employee safety. In addition, the risk levels for the heat index were developed for shaded conditions and light winds. Full sunshine, strenuous work, and the use of heavy or specialized protective clothing require addition precautions. As a result, the risk at a specic heat index could be higher than what is listed in the table above.

14
CARE AND MAINTENANCE
• Always slide the protective sleeve over the sensor
when the meter is not in use.
• Periodically wipe the meter with a dry, lint-free anti-
static cloth.
• Do not use abrasives, solvents or cleaning agents
containing carbon, alcohol or benzenes on the meter.
• Repairs or services not covered in this manual
should be performed by qualied personnel only.
Please contact Sper Scientic to speak with
a technician.
• The Black Ball of the meter is a painted surface.
Take care not to scratch this surface.

15
SPECIFICATIONS
Ambient Air Temperature
Range Resolution Accuracy
0 - 50°C
32 - 122°F
0.1 ±0.6°C, 1.5°F
Globe Temperature
Range Resolution Accuracy
0 - 80°C
32 - 176°F
0.1 ±1°C
@15 - 40°C,
±2°C outside this range
Relative Humidity
Range Resolution Accuracy
5 - 90% 0.1 ± 4%
WBGT
Range Resolution Accuracy
0 - 50°C
32 - 122°F
0.1 ±1°C
@15 - 40°C,
±2°C outside this range
WBGT Formula
In full sun: 0.7WB + 0.2TG + 0.1TA
Indoor or Outdoor Shade: 0.7WB + 0.3TG
Power Supply
AAA, 1.5V battery x 4
Battery Life
110 hours under WBGT of 80.1°F, 45 hours above with
backlight engaged

16 2/20/2018
WARRANTY
Sper Scientic warrants this product against defects
in materials and workmanship for a period of one
(1) year from the date of purchase, and agrees to
repair or replace any defective unit without charge.
If your model has since been discontinued, an
equivalent Sper Scientic product will be substituted
if available. This warranty does not cover batteries,
battery leakage, or damage resulting from accident,
tampering, misuse, or abuse of the product. Opening
the meter to expose its electronics will void the
warranty. To obtain warranty service, ship the unit
postage prepaid to:
SPER SCIENTIFIC LTD.
8281 E. Evans Rd., Suite #103
Scottsdale, AZ 85260
[phone]
The defective unit must be accompanied by a
description of the problem and your return address.
Register your product online at www.sperwarranty.com
within 10 days of purchase.