Sper scientific 840034 User manual
FIRST TIME USE
When operating the meter, press the buttons firmly for one
full second to ensure proper operation.
TABLE OF CONTENTS
Introduction 3
Front Panel Description 4-6
Measurement Procedures 7-14
Low Battery 15
USB Software 16
Troubleshooting 17
Error Codes 18
Specifications 21-22
Probe Replacement 19-20
Before measurement, rotate probe cover clockwise to open.
The probe and anemometer are calibrated as a system. Do
not connect the probe to another psychrometer/
anemometer as measurements will be inaccurate.
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Thank you for purchasing this psychrometer/anemometer.
The unique meter design contains seven HVAC & RH
parameters in one: Humidity, Air Temperature, Dew Point,
Wet Bulb, Air Velocity, Air Volume, and BTU.
The temperature/humidity sensor is built in to the probe and
is protected by a turnable cap. Please turn the cap open to
get accurate temperature and humidity readings when in
operation.
The microprocessor-based psychrometer is a must-have
device for HVAC engineers. It is easy to get wet bulb, dew
point and BTU readings.
INTRODUCTION
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Mx/Mn
Rec/Start
Hold
FRONT PANEL DESCRIPTION
Key Pad
Power
Mode
Enter
Power
1. Press and release the Power button to turn
on the meter.
Mode
2. With the meter on, press the Mode button to
select the different units of measure: Temp
(Temperature), DP (Dew Point), WB (Wet
Bulb), RH (Relative Humidity), Velocity. Press
the Mode button longer than two seconds to
select VOL and CAP.
LCD Display
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Enter
3. Press Enter to confirm the scale settings and cali-
bration.
Mx/Mn/Up ▲
4. Press the Mx/Mn button to view average, maxi-
mum, and minimum values.
Rec/Start
5. In velocity mode, press Rec/Start to start measur-
ing volume or capacity.
Hold/Down ▼
6. Press the Hold button to retain the current read-
ing in the display, and then press Hold again to
return to live measurement.
7. Press the Power button and the Hold button sim-
ultaneously for more than 3 seconds to enter the
RH calibration mode.
8. Press Enter and Hold simultaneously to turn
backlighting on or off.
FRONT PANEL DESCRIPTION
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Auto Off
The 840034 defaults to auto-off mode when turned
on. To override the auto-off function, with the meter
off, hold the Power button and Mx/Mn buttons simul-
taneously for more than two seconds. The meter will
turn on with the auto-off function inactive.
1. With the meter off, press the Power button for
more than two seconds to select metric or imperial
measurement.
2. Press Mx/Mn or Hold to select the scale.
3. Press Enter to save; the meter will turn on auto-
matically.
Select Unit
FRONT PANEL DESCRIPTION
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MEASUREMENT PROCEDURES
Air Flow
Your model 840034 meter measures both basic
measurements, including air temperature, humidity,
dew point, wet bulb, and air velocity as well as ex-
tended measurements, including air volume, sum of
volume, capacity, and sum of capacity.
1. When the meter is turned on, air temperature is
shown on the LCD.
2. To view the other measurement parameters, press
the Mode button (continually) to display them in
turn.
3. Press Mode for over two seconds to switch be-
tween volume and capacity.
Max, Min and Avg
1. When the meter is turned on, min/max and average
readings will automatically be saved for all basic meas-
urements: air temperature, dew point, wet bulb, humidi-
ty, and velocity.
2. Press the Mx/Mn button to view the average value,
maximum value, and minimum value in turn.
3. Press Mx/Mn again to return to normal mode. The data
will be erased once the meter is turned off.
4. When in Mx/Mn/Avg mode, press the Mode button to
cycle through the different parameters (see following).
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MEASUREMENT PROCEDURES
Air Volume: Outlet Size
1. While in standard mode, hold the Mode button to enter
air volume mode.
2. To measure the volume, you must first enter the air out-
let size. There are 3 choices:
Length and Width. Press the Hold button to select the nu-
meric setting first. Then press Mx/Mn to select the appropri-
ate value (0-9). Values are displayed from 0 to 9 in a cycle.
After entering the length, press Enter to save the setting.
Repeat this process for width setting. Press Enter again to
save these settings.
Diameter. While in the default setting mode (length), press
Enter for over two seconds to choose a diameter setting.
Press the Hold button to select a numeric setting first, and
then press Mx/Mn to select the appropriate value. After se-
lecting, press Enter to finish.
Area. While in diameter setting mode, press Enter for over
two seconds to enter the area setting. Press the Hold but-
ton to select a numeric setting first, then press the Mx/Mn
button to select the appropriate value (0-9). After selecting,
press Enter again to finish. (See following examples.)
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MEASUREMENT PROCEDURES
Air Volume
After you set the outlet size settings, there is a 20 second
wait before you can begin measurement.
During the 20 second waiting period, the count -down num-
ber is displayed on the top left-hand corner. The meter will
beep when the wait time is over.
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If you prefer not to wait, press Rec/Start to begin measur-
ing volume right away.
After you begin measuring volume, the meter will au-
tomatically count the volume for 60 seconds to calcu-
late an average value. During this 60 seconds, move
the probe along the entire outlet to cover each part so
the measured data will be more accurate.
The count-down time is displayed on the top left cor-
ner and the meter beeps when 60 seconds is up.
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After 60 seconds the LCD displays the average vol-
ume.
To measure additional outlets, press Enter and you
will be returned to the air volume dimensions setup
screen (see below).
MEASUREMENT PROCEDURES
Capacity Size Set Up
Hold the Mode button while in normal mode to enter air vol-
ume, then press again for approximately one second to en-
ter capacity mode.
If measuring more than one outlet, press Enter again
to repeat the procedure from outlet size input.
After measuring multiple outlet volume, press Mx/Mn
key to review the sum of all outlets. Press Hold key
to review the last outlet volume.
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There are 3 choices for entering size:
Length and Width. Press Hold to select the numeric set-
ting. Then press Mx/Mn to select the appropriate value (0-
9). These values will cycle between 0 to 9. After entering
the length, press Enter to save the setting. Repeat the pro-
cedure for width setting. Press Enter again to finish size
setting.
Diameter. With mode set to length, press Enter for over two
seconds to choose diameter settings. Press Hold to select
the numeric setting first, then press Mx/Mn to select the ap-
propriate values (0-9). After selection, press Enter again to
finish size setting and move to the next step.
Area. While in diameter setting mode, press Enter for over
two seconds to enter area settings. Press the Hold button
to select the numeric first, then press Mx/Mn to select the
appropriate values (0-9). Press Enter again to finish the
size setting and advance to the next step.
MEASUREMENT PROCEDURES
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To measure capacity, put the probe in the outlet, and press
Enter. The meter will count for 60 seconds to measure the
average temperature and RH%. The count-down will dis-
play in the top left corner of the LCD, and the meter will
beep when 60 seconds is up. The meter will display the out-
let size setting automatically.
After pressing Enter to finish and leave size settings, there
is a waiting period before putting the probe to the air
source. During this time, the count -down time is displayed
in the top left corner and the meter beeps when time is up.
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Press Rec/Start to begin measuring right away.
Capacity Measurement
Note: It takes 90 seconds to first stabilize the sensor.
When taking several measurements, the waiting peri-
od automatically adjusts from 90 to 20 seconds on
the second measurement. Move the probe along the
air source to get an accurate value.
MEASUREMENT PROCEDURES
If you would like to measure more than one outlet, wait for
10 minutes between measurements to allow the humidity
sensor to stabilize to ambient humidity.
After measuring capacity, the meter will automatically calcu-
late capacity for 60 seconds and give an average value.
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During the 60 second measurement time, move the probe
to cover the entire area so the measured data is more accu-
rate. The count-down time displayed on the top left is a re-
minder, and the unit beeps when 60 seconds is up.
After the 60 seconds is up, average volume will display on
the LCD.
If there is more than one outlet size, press Enter to repeat
the procedure for outlet size input. You can measure as
many times as necessary.
After measuring more than one outlet volume, you can
press Mx/Mn to review the sum of all outlets. Press the
Hold button to review the last outlet capacity.
MEASUREMENT PROCEDURES
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LOW BATTERY
Your unit contains a two-level battery indicator. Level 1 will
flash. In this situation, the meter will work normally; howev-
er users should install new batteries soon.
The level 2 indicator will show on the LCD screen without
flashing. In this situation the batteries should be changed
immediately as follows:
1. Open the battery cover on the back of the meter.
2. Remove the old batteries.
3. Insert four (4) new AAA batteries and make sure they
are inserted for correct polarity.
4. Replace cover.
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Output USB
A. 9600 bps, 8 data bits, no parity
B. Format: Tx. ASCII code by every second while
meter is on.
VXXX.XMPS (FTM): TXXX.XC (F):HXX.X%
dxxx.xc (F):wXXX.XC(F):
vXXXXX.XCMM(CFM):
UXXXXX.XKW(BTU)
Values for this unit are as follows:
1 = velocity
2 = air temperature
3 = humidity
4 = dew point
5 = wet bulb
6 = air volume
7 = capacity
The x means one of the {0|1|2| |9|-}
C. format for air value:
E01 = probe isn’t connected
E02 = under flow
E03 = over flow
The unit for error code is Nul.
FOR EXAMPLE:
V010.5MPS:TE02Nul:H66.7%:dE04Nu;wE04Nul:v000
20.5CMM
USB SOFTWARE
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TROUBLESHOOTING
Meter is on, but there is no display
1. Make sure that the Power button has been pressed long
enough to turn on the unit.
2. Check and/or replace the batteries. Be sure there is
good contact and that the polarity is correct.
3. Remove batteries for one minute. Replace them, and try
again.
Display disappears
1. Check to see whether low battery indicator appeared
before display disappeared. If yes, replace batteries.
2. Turn on the meter by holding the Power button and the
Mx/Mn button simultaneously for more than two se-
conds. This will turn on the meter and disable the auto
power off function of the meter.
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ERROR CODES
E1 The probe is disconnected or damaged
E2 Below measuring range; calibrate the meter.
E3 Above measuring range; calibrate the meter.
E4 The original data is in error—Value error.
E5 Out of meter display range.
E6 The value is not calculated completely.
E11 Humidity calibration error.
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If you change to a new probe, you should input the
RH% calibration data enclosed in each probe. The
data will be recorded on a slip of paper shipped with
each probe. Please keep the paper for future use.
There are two calibrations that need to be input. The
first value is “Slope, S”; the second value is
“Intercept, Z.”
For Slope (value S):
1. While the meter is off, press the Power button
plus Mx/Mn plus Rec/Start at the same time for
two seconds. This takes you to the humidity slope
calibration mode. The LCD will display the current
saved S value and the last digit (flashing) is ready
to edit.
2. If the saved S value is different from your slip of
paper, press Hold to move to the value you want
to edit and then use Mx/Mn to change the value.
3. Press Enter to save the new S value. The meter
will advance to the intercept (value 2) screen au-
tomatically.
Note: While setting the slope, only input five digits
after the decimal point. You will need to round off the
sixth digit. You should also input two digits before the
decimal.
Examples:
a. If the S value is 8.239678, you should enter
08 23968.
a. If the S value is 11.23968, you should enter
11 23968.
PROBE REPLACEMENT
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c. If the S value is 0.2396838, you should enter
00 23968.
For Intercept (value Z)
1. After pressing Enter to save the S setting, the
meter will advance to the intercept (Z) input
setting automatically. The last digit will flash to
indicate the Z value is now ready for editing.
2. If the last saved Z value is different from the slip of
paper, press Hold to move to the value you want
to edit and then use Mx/Mn to change the value.
3. Press Enter to save the new Z value. The meter
will return to the normal RH value mode.
Note: While setting the Z value, only input three dig-
its after the decimal point. You will need to round off
the fourth digit.
Examples:
a. If the Z value is -928.8683, you should enter
09 28 868.
b. If the Z value is -1928.868, you should enter
19 28 868.
c. If the Z value is -89.68482, you should enter
00 89 685.
PROBE REPLACEMENT
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