Safety Considerations; Siting The Equipment; Connecting To The Mains - Ametek Davenport PET Plus User Manual

3.2 SAFETY CONSIDERATIONS

1 Before connecting the equipment to the mains supply make sure that it is marked with the
voltage of the power supply to be used. The Viscometer and its accessories are not adjustable
for different supply voltages and must only be used on the supply that they were originally
ordered for.
2 There are 2 standard versions, one for 230V ac ±10% and the other for 115V ac ±10%.
3 This equipment complies with electrical safety grade Class 1, which means that it is earthed
apparatus and requires the mains plug to contain a protective earth terminal. The mains plug
shall only be inserted in a socket outlet provided with a protective earth contact. The protective
action must not be negated, e.g. by the use of an extension cord without a protective conductor.
3.3 SITTING THE EQUIPMENT
The Viscometer should be situated within two metres of both electrical and nitrogen gas supplies.
The polymer grinder must be situated as close as possible to the vacuum pump if this drying option is
used. The polymer grinder is operated by compressed air so should be situated close to a suitable air
line if this grinding option is used.
The industrial grinder (cutting mill) can be noisy in operation so this may need to be sited outside of
the testing laboratory.
The polymer grinder and industrial grinder require liquid nitrogen and this should be handled with care
and the user should wear protective gloves because of the danger of cold burns (this has a
temperature of -196ºC).
3.4 CONNECTING THE PET PLUS TO THE MAINS
Connect the mains supply lead to the switched
and fused input connector on the rear of the
vertical column. The mains switch is marked
O and I. The switch is ON when the I end is
pressed and OFF when the O end is pressed.
Only connect to the supply specified on the
Serial Number nameplate situated under the
mains input connector.
16 PET Plus User Manual
Shown: PET Plus On/Off Switch