REED R9900 Instruction Manual Download Page 6

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Pantone 534 Blue

Pantone 123 Yellow

Pantone 485 Red

Pantone 123 Yellow

Pantone 534 Blue

Black

Rich Black - 

20/20/20/100

Blue -  100/80/30/5

Yellow - 0/27/100/0

Red - 10/100/100/5

Yellow - 0/27/100/0

Blue -  100/80/30/5

Only if you REALLY need them:

Pantone 534 Blue -  100/80/30/5

Pantone 485 Red - 10/100/100/5

Pantone 123 Yellow - 0/27/100/

INSTRUMENTS

Max, Min, & Weighted Averages

While in the normal-measuring mode, press the “MAX/MIN” button to 
view the maximum, minimum, and weighted average readings. Each press 
of the “MAX/MIN” button will display the MIN, MAX, STEL (short term 
exposure limit), and TWA (time weighted average), in sequence and will 
then return to normal-measuring mode. 

In MIN and MAX modes, the LCD will show the minimum and maximum 
readings of CO2 on the main display and of the readings on the lower 
displays.

In STEL and TWA modes, the main display will show the weighted aver

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age of CO2 readings for the past 15 minutes (STEL) or 8 hours (TWA). The 
lower displays will continue to measure normally. 

NOTE

: If the meter is turned on for less than 15 minutes, the STEL value 

will be the weighted average of readings taken since power on. This is the 
same for TWA values before 8 hours of activity. 

It takes at least 5 minutes to calculate STEL and TWA. The display will 
show “----” during the first 5 minutes from power on. While all readings 
are held unchanged, STEL and TWA will keep updating every 5 minutes. 

Auto Power Off

This meter turns off automatically after 20 minutes of inactivity. To override 
the function, turn the meter off and hold down the “SET” and “HOLD” 
buttons for 2 seconds to turn on the meter on. “n” will appear on the LCD 
if indicating Auto Power Off is deactivated. NOTE: the auto power off 
function will be disabled during calibration mode. 

Alarm

This meter features an audible alarm when CO2 concentrations exceed 
a set limit. To set-up the alarm, press and hold the “SET” button for two 
seconds. “AL” and P1.0 will appear on the LCD. Press the “ENTER” but

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ton to modify the alarm setting. 

 

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Summary of Contents for R9900

Page 1: ...reedinstruments www com Model Instruction Manual Indoor Air Quality Meter R9900 Rich Black 20 20 20 100 Only if you REALLY need them www com information itm com 1 800 561 8187...

Page 2: ...w 0 27 100 0 Blue 100 80 30 5 Only if you REALLY need them Table of Contents Features 3 Specifications 3 4 Instrument Description 4 5 Operating Instructions 5 8 Data Hold 5 Backlight 5 Max Min Weighte...

Page 3: ...minute period and TWA readings Time Weighted Average over a period of 8 hours Hold function freezes displayed reading Maximum minimum and average functions Low drift non dispersive infrared CO2 senso...

Page 4: ...ne batteries Battery Life 24 hours Includes 4 AA batteries and a hard carrying case Optional accessories 33 Calibration Salt RHA 33 75 calibration salt RHA 75 Instrument Description Power Set button C...

Page 5: ...powering on the meter will beep and commence a 30 second warm up The meter will then enter the normal measuring mode displaying the current CO2 temperature and humidity readings Readings will be updat...

Page 6: ...l continue to measure normally NOTE If the meter is turned on for less than 15 minutes the STEL value will be the weighted average of readings taken since power on This is the same for TWA values befo...

Page 7: ...utton and modify the tempera ture unit by pressing the UP or DOWN buttons Press the ENTER button to save the setting or press the ESC button to cancel CO2 Calibration This meter is calibrated at a sta...

Page 8: ...the calibrating value of 33 32 7 if at 25 C will blink on the LCD along with the current temperature at the left The meter is now calibrating and will finish when CAL and humidity stop blinking which...

Page 9: ...ssary Fixed readings Check if the data hold function is activated Slow response Check to see if the airflow channels on the rear are blocked Error messages E01 CO2 sensor damaged E02 The value is unde...

Page 10: ...n the battery compartment on the rear and make sure they are correct polarity and in good contact Notes __________________________________________ ________________________________________________ ____...

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