Endress+Hauser SpectraSensors SS2100r, Hardware Manual

Page: 33 / 60

Installation
Hardware Manual 2
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7
4. Enter the desired percentage of full scale and press * .
a.
Set 4-20 mA Test = 0; this displays the 4 mA on the AO circuit
when #5 ( Mode 5 ) is pressed.
b.
Set 4-20 mA Test = 50; this displays the 12 mA on the AO circuit
when #5 is pressed.
c.
Set 4-20 mA Test = 100; this displays the 20 mA on the AO circuit
when #5 is pressed.
Testing and adjusting the 4-20 mA zero and span
1. Press #5 ( Mode 5 ) and note the 4-20 mA Test parameter setting
displayed on the analyzer.
2. Adjust the potentiometers on the end of the board to change the
zero and span readings. Refer to Figure 2–2.
3. Press # and 1 to return to Normal Mode.
4. For more information on the analyzer programming, refer to the
Firmware Operator’s Manual.
Conditioning the Analyzer
The sample conditioning system for the SS2100r is built into the analyzer
system. Newly installed systems may have some trace contaminants and/or
are intended for measuring trace amounts of gas constituents that tend to cling
to system walls resulting in erroneous readings if the constituents are not in
equilibrium with the system walls. Therefore, once the analyzer is completely
connected, the entire system (i.e., from the sample source valve to the vent or
return) should be conditioned by flowing sample gas through the system for up
to 12 hours after the system is powered up and before actual readings are
taken. Progress of the system conditioning can be monitored via the gas
concentration readings. Once the gas constituents have reached equilibrium
with the system walls, the readings should stabilize.
<TEST 4-20MA MODE>
4-20 mA output is at
0.0% or 4.0mA