Thermo Scientific TVA2020 Instruction Manual page 126

Servicing
Hydrogen Gas Tank
7-8 TVA2020 Instruction Manual
CAUTION Do not fill hydrogen tank to a pressure greater than 15.2 MPa
(2200 psig). ▲
Note Use prepurified ZERO grade hydrogen (certified total hydrocarbons
as methane <0.5 ppm recommended).
Note The hydrogen filling assembly contains a flow-limiting safety device.
Approximately two minutes are required to fill the tank.
Note All hydrogen fittings are left hand thread — do not overtighten.
1. Turn supply tank valve OFF.
2. Attach tank fill adapter to supply tank with valve OFF and with
manifold valve on OFF position.
3. Attach TVA2020 hydrogen tank to tank fill adapter. (Note left hand
thread — do not overtighten.)
4. Open supply tank valve. Move fill adapter valve to FILL position.
5. Wait for TVA2020 tank to fill. This may take 2 to 3 minutes because
of flow restrictors in the tank and fill adapter.
6. Close fill adapter valve.
7. Remove TVA2020 tank.
8. Close supply tank valve.
9. Remove tank fill adapter.
Always remove the tank from the instrument before storing in the
instrument carrying case.
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Thermo Fisher Scientific
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