Specifications

The 4 to 20 mA output of the SEC 3100 sensor is a non-isolated current source.
Current Output and Corresponding Status
Current Output Status
0-20 mA Normal measuring mode
0.0 mA Unit Fault
0.2 mA Reference channel fault
0.4 mA Analytical channel fault
0.8 mA Unit warm up
1.0 mA Optics fault
1.2 mA Zero drift fault
1.6 mA Calibration fault
2.0 mA Unit spanning
2.2 mA Unit zeroing
4.0 mA Zero gas level (0% of full scale)
5.6 mA (10% of full scale)
8.0 mA (25% of full scale)
12 mA (50% of full scale)
16 mA (75% of full scale)
20 mA Full scale (100% of full scale)
20.1- 23 mA Over-range (> 100% of full scale)
Once the fault is cleared the SEC 3100 will atomatically resume normal operation.
Flash
Rate
Output Current Unit Status
Label
Possible Problem
1 4-20ma Unit Running Unit is measuring gas and adjusting 4-20ma output accordingly.
2 2.2ma Unit Zero Calibrating Unit going through its zero calibration procedure.
3 2.0ma Unit Spanning Unit going through its spanning procedure.
5 0.8ma Unit Warm-up Only for one minute after unit power-up
6 0.0ma Power-up Fault Hard Fault (refer to gas sensor manual)
7 1.6ma Calibration Fault
1. Attempt Unit Span with no gas
2. Attempt Unit Zero with gas
8 NA NA Currently Not Used
9 0.0ma Unit Fault Hard Fault (refer to gas sensor manual)
10 1.0ma Optics Fault Clean sensor’s windows
11 1.2ma Zero Drift Fault Hard Fault (refer to gas sensor manual)
12 0.0ma Configuration Fault Hard Fault (refer to gas sensor manual)
16 0.2ma Reference Channel Fault Hard Fault (refer to gas sensor manual)
17 0.4ma Active Channel Fault Hard Fault or Unit Zero with gas