Emerson Rosemount 936, Reference Manual

Page: 51 / 76

6 Operation
6.1 Operating the open path system
Once you have positioned the system, it automatically monitors for possible specified
gases and sends signals to a standard control panel or personal computer (PC). This
chapter describes alignment, calibration, and operation.
Important
Accurate alignment is essential for proper operation of the Rosemount 936 system.
6.2 Safety precautions
After powering up, the detector requires minimal attention in order to function properly,
but note the following:
WARNING
Follow the instructions in this document; refer to the drawings and specifications issued by
the manufacturer.
WARNING
Do not open the detector/source housing while power is applied.
WARNING
Disconnect external devices, such as automatic extinguishing systems, before carrying out
any maintenance tasks.
6.3 Power up
WARNING
Prior to operating or maintaining the detector, follow Safety precautions .
Procedure
1. Ensure that the source and detector are connected to power.
2. Ensure that the 4-20 mA wiring meter is connected to the detector.
3. Power up the system 18 to 32 Vdc.
After sixty seconds, the current meter indicates 4 mA.
Reference Manual Operation
00809-0100-4036 October 2021
Rosemount 936 51