Chapter 4
_________________________________________________________________________________________
_____________________________________________________________________________
BE6020-14
1316A-1 Multi Gas Monitor
LumaSense Technologies A/S
Instruction Manual
Page 55 of 98
Figure 4.1. Status Window displaying “Zero required”.
During a zero point calibration the sample gas is taken through the Zero
inlet on the rear panel of the monitor with a flow rate of 700 ml/min.
ambient air is used for the zero calibration.
Zero Request
The Zero Request (see
) is set true under the following
conditions:
At POR (power on / reset). When the Multi Gas Monitor is turned ON or
reset, all gas channels will temporarily report 0 gas concentrations (volume
% or ppm). Gas concentration data is only valid after a successful zero
calibration.
After transitioning from standby to normal operating mode.
Zero request interval timeout (90 seconds after POR, followed by a 3
minute then a 6 minute interval and 30 minutes thereafter).
After a ±3°C change in detector temperature.
When an ADC input range error occurs on one or more IR channel (CO
2
,
CO, HC, reference).
