50
WK
Handheld instrument
Display / Controller
Logger / EASYBus
Transmitter
Temperature probe
Alarm / Protection
Air oxygen measuring device
Double display for oxygen and temperature
Measured units: O
2
-concentration and
O
2
-partial pressure
Alarm detector with integrated horn
Automatic temperature compensation
Min./Max. value memory, Hold function
Serial interface, device can be connected
to bus system (up to 5 devices can be con-
nected to one PC interface)
Battery and d.c. operation
Wide range of application
Most simple calibration in atmospheric air
GMH
3691
Sensor not included - please order separately!
Residual oxygen meas. device
for quick and cost-effective measure-
ment of residual oxygen
GMH
3691
GOG
Application:
Essentially there, where delicate products are
conserved by low-oxygen atmospheres (protec-
tive gas), this instrument is suitable to check the
residual oxygen content.
packaging industry
food industry
Specification:
(summary)
Meas. range:
0,0 ... 100,0 % O
2
(O
2
-concentration)
Accuracy:
(whole system - during carefully
calibration and measuring)
1-point-calibration: ±0.2 %O
2
±1 digit
(for concentrations < 10%)
2-point-calibration: ±0.1 %O
2
±1 digit
(for concentrations < 10%)
Oxygen probe:
Oxygen-partial pressure probe,
built in external sensor housing
Response time:
T
90
< 10 sec., depending on
temperature
Operation life:
warranty for sensor element
12 months
(appropriate appli-
cation and ambient pressure)
Working pressure:
0.5 to 2.0 bar abs.
Over-/under-pressure:
max. 0,25 bar
Working temperature:
0 to 50°C (sensor),
-20 to 50°C (device)
Relative humidity:
0 to +95%RH
(non-condensing)
Storage temperature:
-15 to 60°C (sensor),
-20 to 70°C (device)
Power supply:
9V battery type IEC 6F22
Dimensions case:
approx. 394 x 294 x 106 mm
Weight:
approx. 1400g (cpl. set)
for additional technical data refer to
GMH3691 and accessory sensors p. 51
Scope of supply:
Instrument GMH3691, hand pump with air tube,
GOG oxygen sensor with penetration needle, case
GKK3500, spare needle ø0,9mm, rubber foam
sticker (40 pieces), operating manual.
Spare elements, accessories:
GOG-SET
Set without instrument
Scope of supply: GOG oxygen sensor with
penetration needle, hand pump with air tube, case
GKK3500, spare needle and 40 rubber foam sticker
GOEL 370
spare sensor element
GOG-N
needle,
Ø
0.9
mm (5 pieces)
GOG-A
rubber foam sticker (40 pieces)
ST-R1
device protection bag
with cut-out for probe connection
for add. accessories p.r.t. page 56 - 58
Calibration:
1-point calibration: extremely
simple quick calibration in atmospheric air. (press
button to compensate unit to 20.9%).
2-point calibration: first point at atmospheric air
(20.9%), second point freely selectable
Application:
Wide range of application for your home, job and
hobby! For example:
- Bio chemistry:
Oxygen monitoring in breeding
chambers for cell cultures. Monitoring of fermen-
ting process of fruits in fermentation plants etc.
- Medicine:
Monitoring of oxygen concentration
in respirators; checking of breathing, monitoring
of oxygen concentration in incubators, oxygen
tents etc.
- Food technology:
Monitoring of residual oxygen
in packages (e.g. coffee, tea, etc.). Monitoring of
oxygen content during production processes.
- Air conditioning and ventilation technology:
Oxygen measurements, air quality monitoring,
measuring of oxygen concentration in enclosed
air conditioning systems, etc.
- Sport:
Checking of oxygen content in com-
pressed air breathing apparatuses (diving, etc.),
oxygen monitoring for gliding.
The device can only be used to check during
these applications. -> no substitute for ap-
proved monitoring device!
Specification:
Measuring ranges:
Oxygen concentration:
0,0 ... 100,0 %
O
2
(gaseous)
Partial oxygen pressure:
0 ... 1100 hPa O
2
Temperature:
-5,0 ... 50,0 °C
Accuracy:
(device)
(at nominal temperature = 25°C)
Oxygen concentration:
±0.1% ±1digit
Partial oxygen pressure:
±1 hPa ±1digit
Temperature:
±0.1°C ±1digit
Oxygen electrode:
for suitable sensores
p.r.t. page 51
Sensor connection:
6-pin screened Mini-DIN-
socket.
Display:
two 4 digit LCDs
(12.4mm or 7mm high)
,
as well as additional arrows.
Pushbuttons:
6 membrane keys for ON/OFF-
switch, selection of meas. range, min- and max-
value memory, hold-function, calibration etc.
Working temperature:
0 to +50°C
Relative humidity:
0 to +95%RH
(non-condensing)
Storage temperature:
-20 to +70°C
Interface:
serial interface,
direct connection to RS232 or USB interface of
a PC via electrically isolated interface converter
GRS3100 or GRS3105 resp. USB3100 (p.r.t.
accessories).
Power supply:
9V-battery, type IEC
6F22
(in-
cluded),
as well as additional d.c. connector for
external 10.5-12V direct voltage supply. (suitable
power supply: GNG10/3000)
Power-Off-function:
1...120min (can also be
deaktivated).
Power consumption:
approx. 1.5 mA
Low battery warning:
and ' bAt '
Dimensions:
142 x 71 x 26 mm (H x W x D)
Impact-resistant ABS plastic housing, membrane
keyboard, transparent panel. Front side IP65,
integrated pop-up clip.
Weight:
approx. 160 g (cpl. with battery)
Functions:
Min-/Max-value memory:
max. and min. values
will be memorized.
Hold function:
by pressing a button the current
meas. value will be memorized.
Alarm:
integrated limit detector for min. or max.
alarm.
Temperature compensation:
automatic via tem-
perature sensor, integrated in probe housing.
Air pressure compensation:
The O
2
concen-
tration will be compensated according to the abs.
atmospheric pressure set (500...2000hPa).
Accessories:
Suitable sensores
p.r.t. page 51
GKK
3000
case
(275 x 229 x 83 mm)
with punched lining suitable for GMH3xxx
USB
3100 N
interface converter,
electrical isolated
GRS
3105
interface converter
with 5 connection points, electr. isolated, for the
connection of 5 GMH3xxx to one PC (RS232).
ST-R1
device protection bag
with cut-out for probe connection
for add. accessories p.r.t. pages 56 - 58
