Ultima OPIR-5 Detector
36
Sample Calculations for Analog Output Cable
Maximum load is 700 ohms. If an external device has an input impedance of 600 ohms, the
cable resistance must not exceed 100 ohms, where maximum load = device load + cable
resistance. For 16 AWG cable with resistance of 5 ohms / 1000 feet, the maximum distance
from IR5500 and AO device is ((100 / 5 ) / 2) x 1000 feet = 10,000 feet.
AWG
Ohms/1000 ft
Feet
Meters
#20 11 4,550
1,390
#18
7
7,140
2,180
#16 5 10,000
3,050
Table 6: Distances from Receiver to Analog Output Load
7.3 Spare Parts and Accessories
To order spare parts or accessories, please contact your nearest MSA Representative or
MSA directly and give the following information:
Configuration
Number
Description
Quantity
7.3.1 Spare
Parts
329071-1
Pan-Tilt Base Assembly
329073-1
329123-1
Pan-Tilt Arm Assembly
Basic Mounting Arm Assembly
329083-1
Methane Test Gas Film Kit
329084-1
329113-1
329118-1
Propane Test Gas Film Kit
Attenuator
Lamp Replacement Kit
954-021
5 mm T-handle hex key. Used for instrument-mounting screws
and cover-locking screw.
Recommended Spare Parts for one (1) year:
30060-2 Magnet
Assembly
7.3.2 Accessories
329071-1
Pan-Tilt Base Assembly
329073-1
Pan-Tilt Arm Assembly
329123-1
Basic Mounting Arm Assembly
329082-1
Long Range Alignment Kit (includes scope)
