Calibration Range Limits - Dräger PIR 7000 Technical Handbook

Calibration Range Limits

During a calibration using the magnetic wand (part no. 45 43 428), the gas transmitter
provides information concerning the measured value of the device relative to the zero-point
and the set calibration gas concentration. This information is signalled as pulse sequences via
green status light as part of the zero-point and span calibration. This makes possible the
detection of a deviation of the zero-point and the sensitivity before a calibration. The deviations
are zero after calibration has been completed.
measurement
value
sensitivity
(span)
zero-point
The symmetric range limits between range 1 and range 2 can be configured using the Dräger
CC-Vision GDS software, see "Calibration using the Dräger CC-Vision GDS Software" on
page 61.
Factory-preset configuration of the range limits: See page 64.
The green status light of the Dräger PIR 7000 resp. Dräger PIR 7200 indicates zero-point and
span deviations as follows:
Dräger PIR 7000 (in factory-preset configuration)
Zero-point:
Range 3: >3 %LEL
>1.5 to ≤3 %LEL
Range 2:
≤1.5 %LEL
Range 1:
Sensitivity:
Range 3: >15 % from last stored calibration value
>5 to ≤15 % from last stored calibration value
Range 2:
≤5 % from last stored calibration value
Range 1:
Operational Characteristics
range 3
range 2
range 1
range 2
range 3
range 3
range 2
range 1
range 2
range 3
Display of green status light
fixed
configurable
configurable
fixed
fixed
configurable
configurable
fixed
49