RKI Instruments SDM-E2 - Manual (Page 25)

Hardware Setup • 20
(typically channel 6). If one of the two special sensors has a target gas that’s in a 5-
gas cylinder (ie. SO
2
or high range PID), no cylinder change will be required as long
as the SO
2
or high range PID channel is assigned to GAS 1 during the bump testing
or calibration procedure. If one of the two special sensors is an IR sensor that can be
calibrated with the 3- or 4- gas cylinder being used for the standard sensors (ie.
autoranging IR CH4), no cylinder change will be required as long as the IR channel is
assigned to GAS 1. See “Appendix B: Bump Testing and Calibrating EAGLE 2s with
IR Sensors” on page 218 for a brief description of operation specific to IR sensors.
Special Sensor Only EAGLE 2s
NOTE: The following description of default gas port assignments does not
necessarily apply to infrared sensors. If your EAGLE 2 has one or
more infrared sensors installed, read and understand “Appendix B:
Bump Testing and Calibrating EAGLE 2s with IR Sensors” on page 218
before deciding how to arrange your manifold. The gas port
assignments described in the appendix take precedent over those
described below. Keep those gas port assignments in mind while
reading the rest of this section and deciding how to arrange your
manifold.
For a single gas special sensor instrument, the special sensor will be bump tested or
calibrated using GAS 1. Be sure the appropriate cylinder is connected to the GAS 1
fitting or manifold. For multiple configurations of single gas special sensor
instruments, the PC Controller program allows you to select the gas(es) to be applied
through GAS 1. If you do not have a manifold set up for your system, connect the
appropriate calibration cylinder to the GAS 1 fitting on the back of the SDM-E2 that
contains the matching special sensor and select all gases to be applied through GAS
1. If you have a manifold set up for your system (as described in “Assembling a
Manifold for Multiple SDM-E2 Units” on page 12), select only one gas to be applied
through GAS 1. Any unselected gases will be applied through GAS 2 and you will be
prompted by the PC Controller program to change the GAS 2 cylinder. Be sure the
selected calibration cylinder is connected to the GAS 1 manifold and that the
calibration cylinder for the first GAS 2 to be tested is connected to the GAS 2
manifold.
Use Table 2 below as a guide in determining which calibration gas cylinder is
appropriate for your system. See “Spare Parts List” on page 181 for a list of available
cylinder part numbers.
Table 2: Recommended Gas Cylinders for Typical Instrument Types
Typical Instrument Types Recommended Calibration Gas Cylinder
3-gas (LEL/Oxy/CO) 3-gas mix with LEL/Oxy/CO
Standard 4-gas (LEL/Oxy/H2S/CO) 4-gas mix with LEL/Oxy/H2S/CO
Standard 4-gas + low range PID 4-gas mix and IBL
Standard 4-gas + high range PID 5-gas mix with LEL/Oxy/CO/H2S/IBL