Honeywell Sensepoint XCD RTD, Техническое руководство

Страница: 31 / 68

Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1
31
10 Response Check and Calibration
It is recommended to periodically carry out a gas response check on the Sensepoint XCD
RTD to ensure correct operation. This may be done in two ways;
1. A simple Response Check often referred to as a “BUMP TEST” is a test using calibration
gas applied to the sensor via the Weather Protection or using the Sensepoint Gassing
Cap.
If a BUMP TEST is done via the Weather Protection it may be necessary in windy
conditions to increase the flow rate of the test gas by a further 1 LPM, OR, to shelter the
weather protection from the wind.
2. A full gas calibration of the sensor as described in the following section, using ONLY the
Gassing Cap (PN: 2106D2097).
10.1 Zeroing and span calibration
To calibrate the detector, use an appropriate span gas cylinder, constant flow regulator
and the Sensepoint Toxic Gassing Cap (refer to Sensepoint Technical Manual MAN0514
for details). The flow rate is used of approximately 1 to 1.5 litres per minute for calibration.
Apply the gas at the flow rate for the recommended application concentration and time
please see Table 6.
Gas Range
Recommended
Test
Concentration
Application
Time Minutes
Operating Temp.
Min. Max.
H
2
S 0 to 20ppm 10ppm 3 mins -20°C +50°C
H
2
S 0 to 50ppm 20ppm 3 mins -20°C +50°C
H
2
S 0 to 100ppm 50ppm 3 mins -20°C +50°C
CO 0 to 100ppm 50ppm 3 mins -20°C +50°C
CO 0 to 200ppm 100ppm 3 mins -20°C +50°C
CO 0 to 500ppm 250ppm 3 mins -20°C +50°C
Cl
2
0 to 5ppm 3ppm 10 mins -20°C +50°C
Cl
2
0 to 15ppm 10ppm 10 mins -20°C +50°C
O
2
0 to 25% V/V 19% V/V 1 min -15°C +40°C
NH
3
0 to 50ppm 25ppm 10 mins -20°C +40°C
NH
3
0 to 1000ppm 500ppm 10 mins -20°C +40°C
H
2
0 to 1000ppm 500ppm 3 mins -5°C +40°C
H
2
0 to 10000ppm 3000ppm 3 mins -5°C +40°C
SO
2
0 to 15ppm 10ppm 5 mins -15°C +40°C
SO
2
0 to 50ppm 20ppm 5 mins -15°C +40°C
NO 0 to 100ppm 50ppm 5 mins -5°C +40°C
NO
2
0 to 10ppm 5ppm 5 mins -15°C +40°C
NO
2
0 to 50ppm 20ppm 5 mins -15°C +40°C
Table 6
Caution: Before initial calibration allow the detector to stabilize for 30 minutes after applying
power.
When in zeroing and span calibration mode the current output from the detector is inhibited
(default 2mA) to avoid false alarms.