Waters Autospec Premier Operator's Manual page 228

To fit the source heaters
Caution:
they are very fragile.
1. Slide the first source heater into the ion block.
Source heater
Insulating ceramic
2. Ensure that the small insulating ceramic is in place on one lead of the
source heater.
3. Fit and tighten the screw and washer securing the second source heater
lead to the ion block, ensuring that the lead is trapped between the
washer and the ion block.
4. Fit the shaped spacer and heater terminal to the ion block.
Caution:
part of the heater lead, fitted with the insulating ceramic, is in contact
with the ion block.
7-70 Routine maintenance
To avoid damage, handle the source heaters with great care;
To avoid short-circuiting the source heater, ensure that no