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Watlow F4T Install & Troubleshooting
•
52
•
Chapter 8 Appendix
Operating Range
(cont.)
Input Type
Range Low
Range High
mAdc
0
20
mAac
-50
50
Potentiometer, 1K
range
0
1200
Resistance, 5K range
0
5000
Resistance, 10K range
0
10000
Resistance, 20K range
0
20000
Resistance, 40K range
0
40000
4 Thermistor Inputs
Input Type
Max Error @
25 Deg C
Accuracy
Range Low
Accuracy
Range High
Units
Thermistor, 5K range
±5
0
5000
Ohms
Thermistor, 10K range
±10
0
10000
Ohms
Thermistor, 20K range
±20
0
20000
Ohms
Thermistor, 40K range
±40
0
40000
Ohms
•
0 to 40KΩ, 0 to 20KΩ, 0 to 10KΩ, 0 to 5KΩ
•
2.252KΩ and 10KΩ base at 77°F (25°C)
•
Linearization curves built in
• Third party Thermistor compatibility requirements
Base R @ 25C Alpha Techniques
Beta THERM
YSI
2.252K
Curve A
2.2K3A
004
10K
Curve A
10K3A
016
10K
Curve C
10K4A
006
3 Universal Process/Retransmit Outputs
• Universal process/retransmit, Output range selectable:
- 0 to 10V
Î
(dc) into a min. 4,000Ω load
- 0 to 20mA into max. 400Ω load
Resolution
- dc ranges: 2.5mV nominal resolution
- mA ranges: 5 µA nominal resolution
Calibration Accuracy
- dc ranges: ±15 mV
- mA ranges: ±30 µA
Temperature Stability
- 100 ppm/°C
3 Mechanical Relay Outputs
• 2 Form C relays, 1 Form A relay. Form A shares common with 1 Form C relay
•
Each relay is rated at 5A, 24 to 240V
Å
(ac) or 30V
Î
(dc)max., resistive load, 100,000
cycles at rated load. Requires a min. load of 20mA at 24V, 125 VA pilot duty at 120/240
V
Å
(ac) or 25 VA at 24 V
Å
(ac)