For Milliamp Output
The Ultima Gas Monitor may be connected to any device
capable of accepting 4 to 20 mA analog signals such as the:
• Model 5000 unit (with 4 to 20 mA inputs)
• MSA Quad Gas unit
• Programmable controllers
• DCS’s, etc.
Table 1-1. Cable Length and Wire Size,
Toxic Gas or Oxygen Sensor, Frequency Signal Output
In all installations twisted, three-conductor instrument quality cable is required.
In applications where interferences from RFI or EMI or other noise sources exist,
shielded cable is recommended.
WIRE SIZE MAXIMUM CABLE LENGTH IN FEET
22 AWG 10,000
Ensure that there is at least 7 volts DC at the sensor for proper operation
(10 VDC required for Combustible IR models).
Table 1-2. Cable Length and Wire Size,
Combustible Gas Sensor, Frequency Signal Output
In all installations twisted, three-conductor, instrument quality cable is required.
In applications where interferences from RFI or EMI or other noise sources exist,
shielded cable is recommended.
WIRE SIZE MAXIMUM CABLE LENGTH IN FEET
22 AWG 350
18 AWG 950
16 AWG 1,500
12 AWG 4,000
For all models, ensure that there is at least 7 volts DC at the sensor for proper operation
(10 VDC required for Combustible IR models).
Table 1-3. Cable Length and Wire Size,IR Combustible Sensor
In all installations twisted, three-conductor, instrument quality cable is required.
In applications where interferences from RFI or EMI or other noise sources exist,
shielded cable is recommended.
WIRE SIZE MAXIMUM CABLE LENGTH IN FEET
22 AWG 100
18 AWG 800
16 AWG 1,100
12 AWG 2,800
10 volts DC required at the sensor for proper operation of Combustible IR models.
Chapter 1, Set-up
1-13
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