Spectrex Xenon 700 SIL Open-Path Gas Detection System - Manual (Page 55)

TM 799200 Rev (C), January 2014
Safety Precautions 43
6.4 Safety Precautions
After powering up the system, the Detector requires minimal attention in
order to function properly, but the following should be noted:
1 Follow the instructions in the Manual; refer to the drawings and
specifications issued by the manufacturer.
2 Do not open the detector/source housing while power is supplied.
3 Disconnect external devices, such as automatic extinguishing systems
before carrying out any maintenance task warranty.
6.5 Signal Verification
The signal verification can be done through Host software supplied by
Spectrex (see Detection Function Programming, page 19).
6.5.1 Signal Values Limitation
Table 20 describes the maintenance data channels limitation values.
Table 20: Maintenance Channels Limited Values
Channel
Installation Distance
Maintenance Min Med Max
Reference 1V Gain1 1V Gain2 1V Gain3 The minimum signal
allowed is 2.5V at Gain4
Signal 1 1V Gain1 1V Gain2 1V Gain3 The minimum signal
allowed is 2.5V at Gain4
Signal 2 1V Gain1 1V Gain2 1V Gain3 The minimum signal
allowed is 2.5V at Gain4
Ratio 1 0.6-2 0.6-2 0.6-2 0.5-3
Ratio 2 0.6-2 0.6-2 0.6-2 0.5-3
NQRat 1 0.95 – 1.05 Must be 0.95 – 1.05
NQRat 2 0.95 – 1.05 Must be 0.95 – 1.05
LEL 0 LEL x m 0 LEL x m
Temp. Up to 25° C beyond room temp. Up to 25° C beyond
room temp.
Voltage 32VDC > V > 17VDC 32VDC > V > 17VDC
Ref/Noise More than 80 More than 30
Sig 1/Noise More than 80 More than 30
Sig 2/Noise More than 80 More than 30
Note: The installation information refers to the installation distance.
 Min: The minimum distance as defined on the model no.
 Med: Half of the maximum distance as defined on the model no.
 Max: The maximum distance as defined on the model no.