Teledyne 4040 - Methane / Nonmethane analyzer - Manual (Page 30)

Installation Series 4040
30 Teledyne Analytical Instruments
% of Range for THC (THC – Total Hydrocarbon is the summation
of the CH4 and NMH values).
Waveform. Waveform is the FID detection level updated 10 times
each second. The output is compared against the maximum
input for the Analog to Digital Conversion hardware and
scaled to a 0-1VDC (or 4-20mA DC) output.
Note: The Range setting applies to the CH4, NMH, and THC values.
Table 3-1: Analog Output Connections
Pin Function
3 Channel 2, + 4-20 mA, floating
4 Channel 2, – 4-20 mA, floating
5 Channel 1, + 4-20 mA, floating
6 Channel 1, – 4-20 mA, floating
8 Channel 2, 0-1 VDC
23 Channel 2, 0-1 VDC, negative ground
24 Channel 1, 0-1 VDC
7 Channel 1, negative ground
3.3.3.5 A LARM R ELAYS
The nine alarm-circuit connector pins connect to the internal alarm
relay contacts. Each set of three pins provides one set of Form C relay
contacts. Each relay has both normally open and normally closed contact
connections. The contact connections are shown in Table 3-4. They are
capable of switching up to 3 amperes at 250 VAC into a resistive load.
The connectors are:
Threshold Alarm 1:
Can be configured as high (actuates when concentration is above
threshold), or low (actuates when concentration is below threshold).
Can be configured as failsafe or non-failsafe
Configured as non-latching
Can be configured out (defeated).
Can be set to trigger by levels of CH4, NMH, or THC.