Hach GA2 00 Series User manual

DOC344.52.93153
ORBISPHERE Model
GA2X00 O2 EC Sensor
11/2019, Edition 2
User Manual

Table of Contents
Section 1 Specifications........................................................................................ 3
1.1 Sensor specifications............................................................................................ 3
1.2 Sensor configurations........................................................................................... 4
1.3 Sensor membrane specifications.......................................................................... 4
1.3.1 Oxygen sensors (Table 1).......................................................................... 4
1.3.2 Oxygen sensors (Table 2).......................................................................... 5
Section 2 General information............................................................................ 6
2.1 Safety information................................................................................................. 6
2.1.1 Use of hazard information.......................................................................... 6
2.1.2 Precautionary labels................................................................................... 7
2.2 Product overview.................................................................................................. 7
2.2.1 Operating principle..................................................................................... 7
2.2.2 Sensor components.................................................................................... 8
2.3 Product components............................................................................................. 8
2.3.1 Electrochemical sensor.............................................................................. 9
2.3.2 Protection caps........................................................................................... 9
2.3.3 Sensor recharge kit.................................................................................... 9
Section 3 Installation............................................................................................. 10
3.1 Sensor preparation............................................................................................. 10
3.2 Sensor installation.............................................................................................. 13
3.2.1 Sensor positioning information................................................................. 13
3.2.2 Sensor insertion........................................................................................ 14
3.2.3 Sensor removal........................................................................................ 14
3.3 Accessories installation...................................................................................... 15
3.3.1 External pressure sensor.......................................................................... 15
3.3.2 Weld-on stainless steel socket................................................................. 15
3.3.3 The 32003 insertion/extraction valve........................................................ 16
3.3.4 The 33095 sensor housing....................................................................... 17
3.3.5 Tuchenhagen Varivent® in-line access unit.............................................. 17
3.3.6 ORBISPHERE flow chambers.................................................................. 18
3.3.7 Multi-parameter flow chamber.................................................................. 19
Section 4 Maintenance......................................................................................... 20
4.1 Maintenance schedule........................................................................................ 21
4.2 Prerequisites for sensor maintenance................................................................ 21
4.3 Membrane replacement and sensor head cleaning............................................ 22
Section 5 Troubleshooting................................................................................. 28
5.1 Oxygen sensor.................................................................................................... 28
Section 6 Replacement parts and accessories......................................... 29
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Table of Contents
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Section 1 Specifications
Specifications are subject to change without notice.
1.1 Sensor specifications
Table 1 ORBISPHERE family of GA2X00 oxygen sensors
Specification Details—Non-ATEX sensors Details—ATEX sensors
Type Electrochemical oxygen sensor
Dimensions (Ø × L) 32 × 86.3 mm (1.26 × 3.40 in.) Refer to Figure 1.
Weight 300 g
Pressure resistence 40 bar maximum with default PPS collar (100 bar with stainless steel collar)
Materials Stainless steel Stainless steel or hastelloy
Sensor head: Kalrez® O-rings
Sensor bottom: Viton® O-rings1
EPDM and Kalrez® O-rings
Sensor head: Kalrez® O-rings
Sensor bottom: Viton® O-rings or Kalrez® O-rings
Other Smart capability Intrinsically safe
Certification CE CE, Ex II 1 G, Ex ia IIC T6
Note: Unlike the GA2400 non-ATEX sensors, the intrinsically safe GA2800 ATEX sensors have no smart capability
to store calibration data. However, all GA2800 ATEX sensors have the ATEX conformity information engraved on
the sensor itself.
Figure 1 Sensor dimensions
1Viton and Kalrez are trademarks of DuPont Corporation.
English 3