Datasheet

GHM GROUP – Greisinger | GHM Messtechnik GmbH
Hans-Sachs-Straße 26 | 93128 Regenstauf | GERMANY
Phone [phone] | Fax [phone]
www.greisinger.de | [e-mail]
Product Information G 1690
pi_gr_G1690_e V0.00-06.docx 1
Accurately measure oxygen concentration in air
and gas mixtures!
 modern and functional- in pocket size
 waterproof IP65 and IP67
 comfortable air adjustment at push of button
 3-line display with backlight / overhead
display at the push of a button
 long-life and maintenance-free sensor
 sport diver version “T”:
with MOD calculation for Nitrox
 robust, long battery life
 Made in Germany
The G 1690 deliberately focuses on the essential
functions of measurement technology for reliable
measurement of oxygen concentration in gases.
Essential for the reliability and longevity are the
sensors used, GOEL 370 and GOEL 381, especially
suitable for wet environments.
The instruments also impress with their ergonomics,
water protection and display illumination.
Thus, the G 1690 is an inexpensive and precise
submersible gas meter, but is also an inexpensive
but at the same time high-quality entry for many
other oxygen measurements - for example, for
protective gas measurements.
Note: The device serves as an additional control. It
does not replace a measuring device with approval
or safe methods for creating gas mixtures!
Measuring ranges Oxygen concentration:
G 1690-35 / G 1690T-35: 0.0 ... 100.0 vol. % O₂,
recommended for 0.2 ... 35 % vol. % O₂
(reduced precision beyond)
Standard for gas at sport diving, protection gases at
raised CO
2
levels and may more
G 1690-MAX / G 1690T-MAX: 0.0 ...100.0 vol. % O₂
(also for values <=0.2 and above 36 vol. % O₂)
e.g. for inert gases with lowest O
2
content or high-
percentage oxygen mixtures with low CO
2
content
Resolution 0.1 vol. % O₂
G 1690T-XXX: Sport diver variant:
MOD-calculation for Nitrox up to 36%
0..+169 ft. MOD Resolution 1 ft.
0..+60 m MOD Resolution 1 m
Sensor:
Connections: Thread M16x1, 3.5 mm audio plug socket
Max. pressure: ±0.25 bar difference at sensor membrane
0.6 ... 1.75 bar absolute
Response time: 90% in < 10 sec., depending on temperature
Precision adjusted to ambient air, constant conditions for measurement,
sufficient measurement duration:
Variants G 1690(T)-35: Sensor GOEL 370
< 35 vol. % O₂: -0.2 … +0.35 vol. % O₂
35…100 vol. % O₂: not specified
Sensor life time at 20.9 vol. % O
2
ca 2 years
Variants G 1690(T)-MAX: Sensor GOEL 381
< 35 vol. % O₂: ± 0.25 vol. % O₂
35…100 vol. % O₂: ± 2% * (value - 20.9 vol. % O₂)
Sensor life time at 20.9 vol. % O
2
>3 years
Sensor cable: 0.95 m, audio plug, elastic sensor protector
Measuring rate ca. 1 per second
Nominal temperature 25 °C
Working ambient 0..+45 °C; recommended 5..+30 °C: optimized
temperature compensation in this range
0..+95 % r.H. (short time condensing)
Storage temp. -20..+50 °C
Display 3-line with battery status indicator,
Backlight, protected by shatterproof screen,
overhead display at the push of a button
Operation 4 long-life keys, easy to operate
Power supply 2*AA batteries (included), operating time > 3000 h
4 level battery status indicator,
Low battery indication: "BAT LO".
Auto power off function, configurable
Housing break proof ABS, screw locked bat. compartment
Protection rate IP65 / IP67, Sensor IP54
Dimensions 108 x 54 x 28 mm (H x W x D) excl. sensor
Weight ca. 175 g incl. sensor
Hand free for
instrument with
universal valve
adapter GZ 5826
(option or within
set „-DIVE“)
G 1690 O
2
-Analyser /
Oxygen Measuring Instrument
Characterisitcs
Technical Data