APERA INSTRUMENTS DO850 Portable Optical Dissolved Oxygen Meter Instruction Manual
- June 3, 2024
- APERA INSTRUMENTS
Table of Contents
DO850
Portable Optical Dissolved Oxygen Meter
Instruction Manual APERA
INSTRUMENTS (Europe) GmbH
Overview
Thank you for purchasing Apera Instruments DO850 Portable Optical Dissolved
Oxygen Meter. The DO850 measures dissolved oxygen in water using luminescence
technology through an optical sensor and displays data using advanced
intelligent instrument. Compared to electrochemical oxygen analyzers, the
DO850 is more accurate and stable, easier to use and cost-effective portable
dissolved oxygen meter.
Before you use the instrument, please carefully read the instruction manual to
help you properly use and maintain.
1.1 Luminescent optical sensor.
-
Stability and Accuracy: Oxygen is not consumed during measurements. It is not affected by sample flow rate and thus provides a stable measurement.
-
Easy to Use: No electrolytes and membranes are present in the meter; no warm-up; frequent calibration is not necessary.
-
Interference-Free: Sensor cap is coated with a light-shielding layer and minimizes the impact from external light sources. The use of non-chemical sensors helps reduce a
variety of heavy metal ions interference in the aqueous environment, along with H2S and NH4 and other chemical substances. -
Long service life. Other than mechanical deterioration (such as scratches to the light shielding layer), the sensor cap has up to 8000 hours of service life.
-
Easy to Calibrate and Maintain. Probe is equipped with calibration/storage sleeve, which makes calibration and maintenance more convenient and reliable.
1.2 Advanced Intelligent Instrument
- Automatic temperature compensation, automatic pressure compensation and manual salinity compensation.
- Clear large-size LCD display with white backlight.
- Reading stable and automatic locking modes.
- Meets IP57 waterproof rating; in addition, a standard instrument suitcase is provided.
Special Notes
- Sensor cap surface coating can not withstand high temperatures, so the optical dissolved oxygen electrode can not test the water of more than 50 ℃.
- Sensor cap must be kept in a humid environment, if the surface coating is dry, treat it by hydration, otherwise the measured value is unstable or the response is slow, as described in section 4.2 (Probe Maintenance)
- After meter power on, wait about 30 seconds to read value or operatation.
Technical Specifications
Dissolved
Oxygen| Dynamic Range| (0-20.00) mg/L (ppm), (0-200.0)%
---|---|---
Resolution| 0.01/0.1mg/L (ppm), 0.1/1%
Accuracy| ±2% reading or ±2% saturation, whichever is greater
±2% reading or ±0.2 mg/L, whichever is greater
Response Time| 30 s (25°C , 90% response)
Calibration Points| Saturation Point & Zero Oxygen
Temperature Compensation| Automatic, (0 to 50)°C
Pressure Compensation| Automatic, (60 to 120) kPa
Salinity Compensation| Manual, (0 to 45) ppt
Temperature| Range| (0 to 50.0) °C
Resolution| 0.1 °C
Accuracy| ±0.5 °C
Other| Batteries| AA x 3 (1.5Vx3)
IP Rating| IP57
Dimensions and Weight| Meter: 88x170x33 mm/313g
With case: 360x270x76 mm/1.3kg
Product Certificate| RoHs, CE & IS09001:2015
Instructions
3.1 LCD Screen
1 | Measurement mode icon | 7 | Auto lock icon |
---|---|---|---|
2 | Reading/Measured Value | 8 | Temperature Compensation |
ATC — Auto Temperature Compensation
3| Symbol
MTC — Manual Temperature Compensation
4| Units of Measurement
5| Temperature unit| 9| Reading Stability Icon
6| Temprature value / Symbol| 10| Low Voltage Icon
3.2 Key Operation
Short press: key press time < 2 s; Long press: key press time> 2 s.
Power on: Press to turn on. Shutdown: long press 2 seconds off.
Special notes: After meter power on, wait about 30 seconds to read value or
operatation.
Table – 1 Key operation and functions
Key | Operation | Functions |
---|---|---|
Short Press | In the shutdown mode: press the key to boot |
In measurement mode: press to turn backlight on or off
Long Press| Press and hold for 2 seconds to turn off
| Short Press| In measurement mode: press the key to switch unit: %—>mg/L or
%—*ppm
| Long Press| In the measurement mode: press the key for 2 seconds to enter
the calibration mode
Short Press| To cancel any operation, press to return to measurement mode
| Short Press| In the menu mode: press the key to change the serial number or
select the parameter
| Short Press| In the menu mode: press the key to change the serial number or
select the parameter
| Short Press| In measurement mode: press to enter menu mode; In calibration
mode: press key to calibrate;
In the menu mode: press key to confirm the parameter.
3.3 Batteries
The instrument uses three AA batteries, please use the LR6-type alkaline
batteries to ensure battery quality. Battery life> 200 hours (no backlight).
When the display shows symbol as Figure-3, replace the battery.
3.4 Instrument Socket
The instrument uses an 8-pin socket that is protected by a gray rubber cap
seal. When inserting the Probe plug, please insert it after the notch
position, and tighten the plug nut. The end face of the socket and the plug
connection has the sealing ring, which can effectively maintain the waterproof
protection of the socket. Fig.-3
3.5 Reading Stability Mode When the measured value is stable, the LCD
screen displays the icon as shown in Figure-4. If there is no icon or icon
flashing, indicating that the measured value is not stable, the measured value
should not be read or calibrated.
3.6Auto Lock Mode
In parameter setting P4.2 you can select the auto-lock mode (Off-On),select On
to turn on automatic locking. When the reading is stable for more than 10
seconds, the meter automatically locks the measured value and displays the
HOLD icon, as shown in Figure 5.
When auto locked, press to unlock.
3.7 Backlighting
The Instruments LCD screen has a white backlight suitable for use in dimly lit
environments. Turning on the backlight will consume more power. The instrument
is equpped with automatic backlight and manual backlight mode. In automatic
backlight mode, when thepower key is pressed, backlight will be on for a
minute then automatically shuts off; In manual backlight mode, when the key is
pressed, backlight will be on and will be off only is pressed again. In the
parameter setting P4.3, you can select the auto backlight mode (On-Off),
select On to turn on auto backlight, select Off to turn off auto backlight.
3.8 Automatic Power-Off
In the parameter setting P4.4, you can select the auto power off function (On-
Off), select On to turn on auto power off, the instrument will shut down
automatically after 20 minutes, select Off to disable this function.
Optical Dissolved Oxygen Probe
4.1 Probe Structure
The instruments DO803 optical dissolved oxygen probe has a cable length of 3m
and builtin temperature sensor for automatic temperature compensation. The
electrode structure is shown in Fig.-6
1. Bottom cover of the calibration sleeve | 5. Locking cap |
---|---|
2. Sponge for water storage | 6. Optical DO electrode |
3. Sensor cap | 7. 0 ring |
4. Calibration sleeve | Immersion line:The tested solution should be above |
this line
4.2 Probe Maintenance
The sensor cap of the optical DO electrode must be kept in a moist
environment. If the surface coating of the sensor cap dries out, the measured
value will be unstable or the
response will be slow. The electrode calibration sleeve is used to store the
probe.
(A) Short-term storage (less than 30 days): The probe head is kept in the
calibration sleeve. Always keep the sponge inside the calibration sleeve wet.
Several drops of clean water should be added to a dry sponge (let the sponge
be saturated, but not dripping), and tighten the lock cap, so that the sensor
cap is kept in the moistsaturated air.
(B) Long-term storage (greater than 30 days): The probe head is kept in the
calibration sleeve. Check whether the water storage sponge is moist every 30
days or user can store the electrode in a beaker containing water.
(C) Before the first use, unscrew the calibration sleeve to check if the
sponge is wet. If the sponge is dry or if the electrode is exposed to dry air
for more than 8 hours, the surface coating of the sensor cap may be completely
dry. So the electrode should be immersed in tap water at room temperature 25℃
for 24 hours. If the water temperature is low, soaking time is 48-72 hours.
(D) The sponge can not be allowed to get stained or moldy, otherwise it will
consume or produce oxygen. If stained or moldy, please clean immediately.
4.3 Sensor Cap
(A) The sensor cap is an important part of the optical DO probe. The surface
coating of the cap cannot be scratched or mechanically worn. Otherwise, the
life of the sensor
cap will be reduced or the probe will be damaged. Please pay special attention
to it when using the probe.
(B) The surface coating of the sensor cap cannot withstand high temperatures,
so the optical DO probe can not be tested in water above 50 ℃.
(C) If the surface of the sensor cap is contaminated, please do not use
alcohol and organic solvents to clean, otherwise it may damage the probe. It
can be gently wiped with a soft cloth or paper towels. To disinfect the probe,
immerse it in 3% hydrogen peroxide for 15 to 30 minutes and then rinse off
with water.
(D) The sensor cap has a service life of more than 8000 hours. When the probe
is not being used, it does not “bleach” luminescence layer; in addition, the
storage time will not reduce the life of the probe, so the actual use time of
the sensor cap is far more than a year. The major factor affecting the service
life of the sensor cap is the surface coating being damaged under external
force. So the key is to protect the sensor cap from external damage.
(E) If the sensor cap is damaged or deteriorated, users need to purchase a new
one.
Every new cap has a set of calibration codes which need to be input into the
instrument. The specific input method will be described in the instruction
manual of sensor cap.
(F) The probe that comes with the instrument can be used directly without the
input of the calibration codes. So users should not take off the sensor cap
when it is not in use. Nor should one swap the caps from different
instruments. When being installed, the sensor cap must be tightened and the
interior can not be contaminated or wet.
Preparation for Calibration
5.1 Dissolved Oxygen Units Selection
Dissolved oxygen units displays in two forms: mg / L and %, and ppm and %.
Press to switch between mg / L → %, or ppm → %. Users can choose mg / L or
ppm in parameter setting P3.1, but only a percentage (DO %) is displayed in
calibration.
5.2 Resolution Selection
The resolution unit can be selected in parameter setting P3.2: 0.01 or 0.1mg/L
(ppm). After setting, the meter will display resolution of 0.1 or 1 in
according to %.
5.3 Temperature Unit Selection
The temperature unit can be selected in parameter setting P4.1: ℃ or ℉.
5.4 Air Pressure Compensation
The instrument has automatic air pressure compensation function. The
instrument has been performed the air pressure calibration before it leaves
the factory. So generally users do not have to calibrate the air pressure. If
necessary, calibrate it according to the value of the standard barometer.
Refer to parameter setting P3.4 for the procedure of barometric calibration.
5.5 Salinity Compensation
The instrument has manual salinity compensation. It is set in the parameter
P3.3 (0 to 45 ppt). To obtain accurate readings in mg/L and ppm, it is
necessary to know the salinity of the solution to be tested and input it into
the instrument. As the salinity of the solution increases, the level of DO
decreases. Generally, salinity of freshwater is 0 to 0.5ppt, salinity of
seawater is 35ppt.
Calibration
6.1 Saturated Oxygen Calibration
(A) This procedure requires the use of a calibration sleeve to allow the probe
to be calibrated in a humidity-saturated atmosphere
(B) Check that the sponge in the calibration sleeve is wet. Attach the
calibration sleeve to the probe. Tighten the locking cap. Be careful not to
have water droplets on the head of the cap. Wait for 5 to 10 minutes after
turning on the instrument. Saturate the air in the calibration sleeve with
water vapor. In addition, wait for the temperature to completely stablize.
(C) Long press the key to enter the calibration mode, and the CAL is flashing
in the upper right corner of the LCD. Wait for the stable icon to appear and
stay, press the key to calibrate, once the instrument displays a stable 100%,
it is ready to use.
6.2 Zero -Oxygen Calibration
Zero-Oxygen calibration is only performed when a probe or sensor cap is
replaced or the probe has not been used for a long period. It is usually not
necessary to conduct zero oxygen calibration. The instrument is factory
calibrated for zero oxygen, so it is not necessary to perform a zero-oxygen
calibration for the first time. Zero-oxygen calibration should follow these
steps:
(A) Preparation of 100ml of oxygen-free water: in the 100ml beaker weigh 2g
anhydrous sodium sulfite (Na2SO3) and add 100ml of pure water or tap water to
dissolve.
Oxygen-free water is effective within 1 hour.
(B) Put the electrode into the oxygen-free water, wait for 3 to 5 minutes
after the instrument is turned on, and wait for the temperature and measured
value to completely stabilize. The measured value should be very low, 0.1mg /
L or so.
(C) Long press to enter the calibration mode. The upper right corner of the
LCD will flash CAL . Wait for a stable icon. Press and the zero-oxygen
calibration is completed.
6.3 Special Notes for Calibration
(A) Optical dissolved oxygen probes have better stability and smaller
calibration drift compared to conventional electrochemical dissolved oxygen
electrodes, which means that the instrument can maintain its calibration data
for a few months. However, for better accuracy, it is recommended that the
oxygen saturation calibration be performed
according to section 6.1 before use every day.
(B) Drying of the surface coating of the sensor cap can adversely affect the
stability of the measurement. Please pay special attention to this situation.
See Section 4.2 (Probe
Maintenance) for details.
(C) The instrument has factory default setting function, select YES in
parameter setting P3.5, the meter will be calibrated to the theory value.
Measurement
7.1 When measuring, place the probe in sample solution, swirl quickly in the
solution for a few seconds and rest it to remove bubbles from the measuring
surface of the sensor cap. The solution must be above the immersion line of
the probe. Note that brief shaking the probe in solution is only to eliminate
bubbles. Not like conventional electrochemical electrodes, the measuring via
optical dissolved oxygen probes does not require constant stirring of the
solution or flowing fluid.
7.2 Users can read the measured values when the icon appears and stays. Note
that the measurement time is related to temperature. When the solution
temperature and the probe temperature is close, the measurement time is about
one minute. When the solution temperature and the electrode temperature differ
a lot, it takes about 3 minutes to each a stable reading. This is because the
reading of dissolved oxygen is heavily influenced by temperature, and the
probe senses temperature much more slowly than dissolved oxygen.
Parameter Settings
8.1 Press the key in the measurement mode to enter the parameter setting mode P3.0, press the key to switch the menu P3.0 →P4.0; In P3.0 mode, press to enter P3.1, press to switch submenu P3.1→P3.5; In P4.0 mode, press to enter P4.1, press to switch submenu P4.1→P4.4. See Table 2 for details.
Table-2 Parameter Setting List
Menu | Submenu | Parameter | Code | Content |
---|
P3.0 DO
parameter| P3.1| DO Units Selection| /| mg/L—ppm
P3.2| Resolution Selection| /| 0.01/0.1 mg/L(ppm)
P3.3| Salinity Compensation| /| (0 to 45) ppt
P3.4| Air Pressure Calibration| | (60 to 120) kPa
P3.5| Back to Factory Default| | No—Yes
P4.0 Basic
parameter| P4.1| Temp. Unit Selection| /| °C °F
P4.2| Auto Lock| /| Off—On
P4.3| Auto Backlight| | On—Off
P4.4| Auto Power Off| | On—Off
8.2 DO Parameter setting (press or to switch)
| P3.1—Dissolved Oxygen Unit (mg/L—ppm)
.In P3.0 mode, press the key to enter P3.1 mode.
.Press thekey, mg / L flashes, press the key to select mg/L → ppm, press to
confirm. Press to enter P3.2 mode, or press to return to measurement mode.
---|---
| P3.2—Resolution (0.01-0.1mg/L)
1.Press the key, 0.01 flashes, press the key to select resolution (0.01-
.1mg/L),press to confirm.
2Press to enter P3.3 mode, or press to return to measurement mode.
| P3.3—Salinity Compensation (0~45 ppt)
1Press the key, 0 flashes, Press or key to adjust salinity value (0 to 45
ppt), Press Key to confirm.
2Press to enter P3.4 mode,or press to return to measurement mode.
| P3.4—Air Pressure Calibration (60 to 120 kPa)
1.Press thekey, 101.3 flashes, according to standard pressure value. Press or
key to adjust, Press key to confirm.
2.Press to enter P3.5 mode, or press to return to measurement mode.
| P3.5—Back to Factory Default (No—Yes)
Press key, No flashes, Press key to select No →Yes, Press key to confirm.
Meter returns to measurement mode. No—cancel restore. Yes—restore
8.3 Basic Parameter setting (press or to switch)
| P4.1— temperature unit (℃—℉)
1. In P4.0 mode, Press key to enter P4.1 mode.
2.Press key, °C flashes, Press key to select °C→°F,Press key to confirm.
2.Press key to enter P4.2 mode, or key to return to measurement mode.
---|---
| P4.2—Auto Lock (Off—On)
1Press key, Off flashes, Press key to select Off→On,Press key to confirm.
Off—unlock; On—lock (If reading stays stable for more than 10seconds, it auto
locks).
2. Press key to enter P4.3 mode, or key to return to measurement mode.
| P4.3—Auto Backlight (On—Off)
1.Press key, On flashes, Press key to select On→Off, Press key to confirm. On
– Auto backlight on, Off – Auto backlight off.
2.Press key to enter P4.4 mode, or press key to return to measurement mode.
| P4.4—Auto Power Off (On—Off)
1. Press key, On flashes Press key to selectOn→Off,press key to confirm.
On—auto power off on Off—auto power off off
2. Press key to return to measurement mode
Complete Kit
9.1 What’s in the box
| Content| Quantity
---|---|---
1.| D0850 Portable Optical Dissolved Oxygen Meter| 1
2| D0803 Optical Dissolved Oxygen Probe| 1
3| Probe Calibration Sleeve| 1
4| Small Screwdriver| 1
5| Carrying Case| 1
6| Sponge for Water Storage (spare)| 4
7| Instruction Manual| 1
9.2 Accessories for separate purchase
Model | Name |
---|---|
D0803 | Optical DO probe (3m cable, with sensor cap and calibration sleeve) |
D0810 | Optical DO probe (10m cable, with sensor cap and calibration sleeve) |
D08032 | Sensor cap |
D08031 | Calibration sleeve |
Warranty
10.1 We warrant this instrument to be free from defects in material and
workmanship and agree to repair or replace free of charge, at option of APERA
INSTRUMENTS (Europe) GmbH, any malfunctioned or damaged product attributable
to responsibility of APERA INSTRUMENTS (Europe) GmbH for a period of 3 YEARS
from the date of purchase. That of DO803 optical DO probe (excluding sensor
cap) is 2 years from the date of purchase. That of DO8032 sensor cap is 1 year
from the date of purchase.
10.2 Damage and malfunction of the product caused by the following reasons are
not covered by the warranty:
(A) Fails to install, operate, or use the product in accordance with the
instruction manual, or if the product is damaged by abuse or incorrect use;
(B) The sensor cap is damaged by external force and can not work; or the
electrode cable is damaged or twisted due to external force;
(C) Fails to maintain the product in accordance with the requirements of this
manual and the industry standard process;
(D) Any unauthorized repairs, and the use of defective or incorrect components
to repair the product;
(E) Any modification of the product unauthorized by the Company.
10.3 Product Warranty Period is the free of charge service time for the user
who purchase the product, not the service life of the instrument or the probe.
Trouble Shooting
Error | Solutions |
---|---|
The instrument does not turn on | 1.The battery is not installed correctly. |
Check the polarity.
2.Battery low voltage, replace the battery.
3.Instrument freezes. Unplug the battery and then install.
The instrument can not calibrate| 1.Check calibration procedure: correct
atmospheric pressure, salinity input and temperature.
2.The measured value is not stable, prolong the stabilization time, until the
demonstration then presses the key.
3.Check the sensor cap. If it is contaminated, it can be cleaned; if dry, it
can be hydrated; if damaged it can be replaced.
DO readings are not accurate| 1.Check whether the temperature is stable, the
salinity input and barometric pressure are accurate.
2.If the probe calibration is not good, recalibrate.
3.Check the sensor cap. If it is contaminated, it can be cleaned; if dry, it
can be hydrated; if damaged it can be replaced.
4.Unscrew the sensor cap, check whether there is moisture inside, if so, wipe
off, dry, and tighten it.
The display value stays 200% or 20.0 mg/L. No change| 1.Check whether the
concentration of the sample is higher than 200% or 20.0 mg / L (ppm).
2.Check if the temperature reading is accurate.
3.If the probe calibration is not good, recalibrate.
4.Check the sensor cap. If it is contaminated, it can be cleaned; if dry, it
can be hydrated; if damaged, it can be replaced.
Appendix A: Oxygen Solubility Table (760mm Hg)
Temp °C| Chlority: 0
Salinity: 0| 5.0 ppt
9.0 ppt| 10.0 ppt
18.1 ppt| 15.0 ppt
27.1 ppt| 20.0 ppt
36.1 ppt|
25.0 ppt
45.2 ppt
---|---|---|---|---|---|---
0.0| 14.62| 13.73| 12.89| 12.10| 11.36| 10.66
1.0| 14.22| 13.36| 12.55| 11.78| 11.07| 10.39
2.0| 13.83| 13.00| 12.22| 11.48| 10.79| 10.14
3.0| 13.46| 12.66| 11.91| 11.20| 10.53| 9.90
4.0| 13.11| 12.34| 11.61| 10.92| 10.27| 9.66
5.0| 12.77| 12.02| 11.32| 10.66| 10.03| 9.44
6.0| 12.45| 11.73| 11.05| 10.40| 9.80| 9.23
7.0| 12.14| 11.44| 10.78| 10.16| 9.58| 9.02
8.0| 11.84| 11.17| 10.53| 9.93| 9.36| 8.83
9.0| 11.56| 10.91| 10.29| 9.71| 9.16| 8.64
10.0| 11.29| 10.66| 10.06| 9.49| 8.96| 8.45
11.0| 11.03| 10.42| 9.84| 9.29| 8.77| 8.28
12.0| 10.78| 10.18| 9.62| 9.09| 8.59| 8.11
13.0| 10.54| 9.96| 9.42| 8.90| 8.41| 7.95
14.0| 10.31| 9.75| 9.22| 8.72| 8.24| 7.79
15.0| 10.08| 9.54| 9.03| 8.54| 8.08| 7.64
16.0| 9.87| 9.34| 8.84| 8.37| 7.92| 7.50
17.0| 9.67| 9.15| 8.67| 8.21| 7.77| 7.36
18.0| 9.47| 8.97| 8.50| 8.05| 7.62| 7.22
19.0| 9.28| 8.79| 8.33| 7.90| 7.48| 7.09
20.0| 9.09| 8.62| 8.17| 7.75| 7.35| 6.96
21.0| 8.92| 8.46| 8.02| 7.61| 7.21| 6.84
22.0| 8.74| 8.30| 7.87| 7.47| 7.09| 6.72
23.0| 8.58| 8.14| 7.73| 7.34| 6.96| 6.61
24.0| 8.42| 7.99| 7.59| 7.21| 6.84| 6.50
25.0| 8.26| 7.85| 7.46| 7.08| 6.72| 6.39
26.0| 8.11| 7.71| 7.33| 6.96| 6.62| 6.28
27.0| 7.97| 7.58| 7.20| 6.85| 6.51| 6.18
28.0| 7.83| 7.44| 7.08| 6.73| 6.40| 6.09
29.0| 7.69| 7.32| 6.93| 6.62| 6.30| 5.99
30.0| 7.56| 7.19| 6.85| 6.51| 6.20| 5.90
31.0| 7.43| 7.07| 6.73| 6.41| 6.10| 5.81
32.0| 7.31| 6.96| 6.62| 6.31| 6.01| 5.72
33.0| 7.18| 6.84| 6.52| 6.21| 5.91| 5.63
34.0| 7.07| 6.73| 6.42| 6.11| 5.82| 5.55
35.0| 6.95| 6.62| 6.31| 6.02| 5.73| 5.46
36.0| 6.84| 6.52| 6.22| 5.93| 5.65| 5.38
37.0| 6.73| 6.42| 6.12| 5.84| 5.56| 5.31
38.0| 6.62| 6.32| 6.03| 5.75| 5.48| 5.23
39.0| 6.52| 6.22| 5.98| 5.66| 5.40| 5.15
40.0| 6.41| 6.12| 5.84| 5.58| 5.32| 5.08
41.0| 6.31| 6.03| 5.75| 5.49| 5.24| 5.01
42.0| 6.21| 5.93| 5.67| 5.41| 5.17| 4.93
43.0| 6.12| 5.84| 5.58| 5.33| 5.09| 4.86
44.0| 6.02| 5.75| 5.50| 5.25| 5.02| 4.79
45.0| 5.93| 5.67| 5.41| 5.17| 4.94| 4.72
Salinity = Dissolved salts in water.
Chlorinity = Measure of chloride content, by mass, of water.
S (‰) = 1.80655 x Chlorinity (‰)
Appendix B: DO % Calibration Values
Cal. value| Pressure| Cal. value|
Pressure
---|---|---|---
D.O. %
| in Hg| mmHg| kPa| mbar| D.O. %| in Hg| mmHg| kPa|
mbar
101%| 30.22| 767.6| 102.34| 1023.38| 86%| 25.73| 653.6| 87.14| 871.40
100%| 29.92| 760.0| 101.33| 1013.25| 85%| 25.43| 646.0| 86.13| 861.26
99%| 29.62| 752.4| 100.31| 1003.12| 84%| 25.13| 638.4| 85.11| 851.13
98%| 29.32| 744.8| 99.30| 992.99| 83%| 24.83| 630.8| 84.10| 841.00
97%| 29.02| 737.2| 98.29| 982.85| 82%| 24.54| 623.2| 83.09| 830.87
96%| 28.72| 729.6| 97.27| 972.72| 81%| 24.24| 615.6| 82.07| 820.73
95%| 28.43| 722.0| 96.26| 962.59| 80%| 23.94| 608.0| 81.06| 810.60
94%| 28.13| 714.4| 95.25| 952.46| 79%| 23.64| 600.4| 80.05| 800.47
93%| 27.83| 706.8| 94.23| 942.32| 78%| 23.34| 592.8| 79.03| 790.34
92%| 27.53| 699.2| 93.22| 932.19| 77%| 23.04| 585.2| 78.02| 780.20
91%| 27.23| 691.6| 92.21| 922.06| 76%| 22.74| 577.6| 77.01| 770.07
90%| 26.93| 684.0| 91.19| 911.93| 75%| 22.44| 570.0| 75.99| 759.94
89%| 26.63| 676.4| 90.18| 901.79| 74%| 22.14| 562.4| 74.98| 749.81
88%| 26.33| 668.8| 89.17| 891.66| 73%| 21.84| 554.8| 73.97| 739.67
87%| 26.03| 661.2| 88.15| 881.53| 72%| 21.54| 547.2| 72.95| 729.54
APERA INSTRUMENTS (Europe) GmbH
Wilhelm-Muthmann-Straße 18
42329 Wuppertal, Germany
Email: info@aperainst.de
Website: www.aperainst.de
Tel.: +49 202 51988998