YSI PRO20 Manual do Utilizador descarregar pdf (Página 17)

MEMBRANE TYPE

Membrane Type sets the type of membrane used on the dissolved oxygen sensor;

either 1.25 PE (Yellow) or 2.0 PE (blue). Use the up or down arrow keys to

highlight Membrane Type and press enter

to open the membrane submenu.

Highlight the membrane type corresponding to the membrane installed on the

sensor and press enter to confirm. The enabled membrane type will have an ‘X’ in

the box next to it. Use the down arrow key to highlight the ESC – Exit box and

press enter to save changes and to close the membrane submenu.

The dissolved oxygen sensor is supplied with membranes specific to the sensor

type ordered and are color coded as described in the following tables.

Galvanic Membrane Kits

Item Color Material Description

5913 Yellow 1.25 mil polyethylene Faster response time and less flow

dependence than traditional Teflon®

membranes

5914 Blue 2.0 mil polyethylene Less flow dependence than 1.25 mil

but somewhat slower response

Polarographic Membrane Kits

Item Color Material Description

5908 Yellow 1.25 mil polyethylene Faster response time and less flow

dependence than traditional Teflon®

membranes

5909 Blue 2.0 mil polyethylene Less flow dependence than 1.25 mil

but somewhat slower response

Selecting a Dissolved Oxygen Membrane

Membrane Type Flow Dependence After 4 Minutes Typical Response Time

to 95%

5913, 5908 - Yellow 25% 8 seconds

5914, 5909 – Blue 18% 17 seconds

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 183 184

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YSI PRO20 Manual do Utilizador Página 17