22
OLC(T)100
Technical manual
Chapter 4 | Calibration
|
The tasks described in this chapter are reserved for authorised
trained personnel only, since these tasks are liable to affect
detection reliability
This procedure describes:
❧
4 mA calibration for 4-20 mA detectors;
❧
zero adjustment;
❧
Sensitivity adjustment.
Necessary equipment
❧
Multimeter (ranges 0-30 mA and 0-2 V), intrinsically safe if necessary.
❧
Bottle of pure air.
❧
Bottle of standard gas, of suitable concentration for the measurement range
(between
30 and 70% of the measurement
range).
Commissioning
Prior checks
Check the following points:
❧
Wiring completed.
❧
Detector housing grounded.
❧
Connection made between the connector cable braided screen and central
unit ground.
❧
Integrity of the mechanical mounting (fixings, cable gland, and cover) ensured.
Powering up detector
1. Inhibit any installation alarms to avoid unexpected triggering during the
operation.
2. Connect power to the detector line in accordance with the manufacturer's
instructions.
Содержание OLC 100
Страница 1: ...P N NPO100GB rev C...
Страница 45: ...9 Declaration of EC conformity 45...
Страница 46: ...46 OLC T 100 Technical manual Chapter 10 Technical specifications...
Страница 50: ...50 OLC T 100 Technical manual Mark on sensor VQ1 4F poison resistant sensor Figure 25 mark on VQ1 sensor...
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Страница 63: ...Annexe Ordering information 63...