Greisinger GGO 370, GOO 370, GGO 380, GOO 380 User guide

Z11.0.0X.6C-13 page 1 of 4

Application:

diving

Low Oxygen concentrations

Specific features:

Stronger membrane

: enhanced life time

and more robust against pressure changes.

Coated electronics

: corrosion protection.

less

dependence on operating position

and better t

emperature compensation

CO2 tolerant

For low O2 concentration
Fast response

Measuring range:
Partial oxygen pressure:
Oxygen concentration:
Temperature:

0 ... 1100 hPa O2
0,0 ... 100,0 % O2 (gaseous)
0,0 ... 45,0 °C

0 ... 300 hPa O2
0,0 ... 25,0 % O2 (gaseous)
0,0 ... 50,0 °C

Electrolyte:

acidic electrolyte

basic electrolyte

Response time:

90% in <10 sec.,
depending on temperature

90% in <5 sec.,
depending on temperature

Cross sensitivities:

none to He, H2 and CO

Signal of <0.1 %
15% CO

2

in N2,
10% CO in N2,
3000ppm NO in N2,
3000ppm C3H8 in N2,

500ppm H2S in N

2

,

500ppm SO2 in N

2

,

1000ppm Benzene in N2

Nominal sensor life:

approx. 2 years at standard condition

approx. 2 years at standard condition

Operating conditions:

0 - 45 °C,
0 - 95 %RH (non-condensing)

0 - 50 °C,
0 - 95 %RH (non-condensing)

WEEE-Reg.-Nr. DE93889386

GREISINGER electronic GmbH

D - 93128 Regenstauf, Hans-Sachs-Straße 26

 +49 (0) 9402 / 9383-0  +49 (0) 9402 / 9383-33  [e-mail]

Operating Manual

GGO ..., GOO ...

Specification: GGO 370, GOO 370 | GGO 380, GOO 380

Sensor: Partial oxygen pressure sensor
Sensor types:

GGO ... : closed sensor
GOO ... : open sensor

Ambient pressure: 0.5 to 2.0 bar abs.
Over-/under-pressure: max. 0.25 bar (pressure difference sensor membrane to ambient – sensor screwed-in)
Storage temperature: -15 to +60 °C
Warranty period: 12 months (assuming appropriate usage according to the manual)
Connection: approx. 1 m cable with Mini-DIN-plug.
Dimensions of housing: GGO..: approx. Ø 36 mm x 95 mm (150 mm incl. anti-buckling glanding),

GOO..: approx. Ø 40 mm x 105 mm (160 mm incl. anti-buckling glanding)
Housing with M16 x 1-screw thread (sensor can be connected to line tubes by
means of an additional adapter)

Weight: approx. 135 g (GGO...) or approx. 145 g (GOO...)
EMC: The GGO.../GOO... corresponds to the essential protection ratings established in

the Regulations of the Council for the Approximation of Legislation for the member
countries regarding electromagnetic compatibility (2004/108/EG).
additional fault: <1%

Z11.0.0X.6C-13 page 2 of 4

General information about the oxygen sensors

I.) Lifetime:

At the end of life time the sensor signal drops relatively fast. The electrode evaluation in % therefore just can be
used for orientation. An evaluation of 70% does not mean that 70% of life time are remaining, but 70% of the ref­erence signal are available, which happens normally at the end of life time.

Note: The electrode evaluation is updated by the instrument every time, when the calibration of the sensor was

performed successfully. (pleas also see the referring manual of the instrument)

The nominal life time can be shortened significantly by usage. Influencing factors are:

- Storage- / Operation temperature

- Humidity of measured gas: If permanently used with dry gases (technical gases, bottled gas) the life time de­creases considerably.
It helps, if the sensor is brought to normal humid ambient air in measuring breaks (“flush” system with fresh air).

II.) Operating position:

The optimum operation position is with the sensor inlet pointing downwards, maximum differential pressure to am­bient is 250 mbar.

III.) Measuring precision:

The measuring precision can be influenced by:

- Liquids at the sensor inlet. Rinse the inlet and dry with lint-free cloth.
Attention: avoid liquids of any kind at the contacts

- Gas and sensor temperature have to be at same level. Best precision, when calibrated at measuring tempera­ture.

- Pressure fluctuations: The sensor is originally a partial pressure sensor, i.e. changes in the absolute pressure
are influencing the measuring result directly proportional. A pressure change of 1% will cause a additional
measuring error of 1%!
For optimum precision calibrate at the same conditions at which You want to measure.

Application areas for the sensors G... 370 and G... 380

GGO 370, GOO 370 (acidic electrolyte):

Specialized sensor for diving application e.g. measuring Nitrox.
Suitable for application with larger CO2 concentration.

GGO 380, GOO 380 (basic electrolyte)

Sensor for low oxygen concentration e.g. controlled atmosphere.
For application without larger CO2 concentration. *1

*1: The sensors G__ 380 are designed to measure oxygen-concentration in air or other gases without larger CO2-

concentration. A higher CO2-concentration reduces the life-time of the sensor.
Short-time exposition at up to 10% CO2 is not problematic (for example 15 minutes. up to 10 times per day) for the

sensor (exhaust measurings eg.) If there is measured more often with elevated CO2-concentration or at CO2­concentrations above 10%, the exposition time has to be kept as short as possible and sufficient measuring
pauses should be made.

Note: If the sensor is not exposed to free air during measuring pauses, the connected tubes etc. have to be

flushed with clean air or nitrogen.