Spectrex Quasar 900 Open-Path Gas Detection System - Manual (Page 51)

TM 888200 Rev (I), January 2014
Safety Precautions 39
6.4 Safety Precautions
After powering up, 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. Refer to Manual TM 888050 or by Handheld unit refer to Manual
TM 799060.
6.5.1 Signal Values Limitation
Table 13 describes the maintenance data channels limitation limits.
Table 13: Maintenance Channels Limit Values
Channel
Installation Distance
Maintenance Min Med Max
Reference 1V Gain1 1V Gain2 1V Gain4 The minimum signal
allowed is 2V at Gain9
Signal 1 1V Gain1 1V Gain2 1V Gain4 The minimum signal
allowed is 2V at Gain9
Ratio 0 0.6-1.4 0.6-1.4 0.6-1.4 0.5-3
NQRat 0 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 > 18VDC 32VDC > V > 18VDC
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 defined on the model no.