Arizona Hydrogen Sulfide Analyzer Jerome 631-X - Manual (Page 43)

Jerome 631-X instruments shipped after early 1995, are capable of providing 0-2 volts analog
output. Instruments shipped before that time can be upgraded by a firmware update and
adjustment.
Instruments that are capable of 0-2 volt output can be
upgraded to the 4-20 mA output with the addition of an
option board upgrade. This must be installed at the
factory.
Connection and Setup:
• 0-2 volt devices connect as shown in Figure 1. If
the instrument includes an option board, be sure its
analog jumper (SW101) is set to the “V” position.
• The 4-20 mA active receivers connect as shown in
Figure 2. The active receiver must contain a voltage
source to power the loop current. The receiver must
also have an isolated input circuit. That is, it must
not be connected to ground or to a voltage source
referenced to ground. Be sure that jumper SW101 i
set to the “I” position before power is applied.
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AZI Customer Service 800-528-7411 or 602-470-1414 Page 43 of 50