MKS Baratron 121A, Instruction Manual, Page: 34 / 62

Environmental Requirements Chapter Two: Installation
24
Environmental Requirements
Follow these requirements when installing and using a Type 121 Absolute Pressure Transducer.
1. The normal operating temperature range, for the sensor and cable, is 0° C to 150° C
(32° F to 302° F).
The Type 121 sensor is bakeable to 200° C (392° F) with the sensor housing and cable
removed.
2. The normal operating temperature range, for the electronics unit (signal conditioner), is
0° C to 50° C (32° F to 122° F).
3. The power input required is ±15 VDC (±5%) @ 35 mA.
4. The overpressure limit is 35 psia or 120% of sensor Full Scale, whichever is greater.
5. It is important that the unit be kept free from vibration, because the diaphragm, when not
subject to gas damping at low pressure, may become susceptible to resonance. The
1 Torr F.S. units are the most sensitive; any vibration that does exist should be isolated
from the unit with vibration isolation mounting and a bellows coupling (MKS-supplied
or MKS-compatible).
For additional Type 121 transducer requirements refer to Appendix A: Product Specifications,
page 43.