Response Check And Calibration; Zeroing And Span Calibration - Honeywell Sensepoint XCD RTD Technical Manual

Sensepoint XCD RTD Technical Manual

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

Caution: Before initial calibration allow the detector to stabilize for 30 minutes after applying
When in zeroing and span calibration mode the current output from the detector is inhibited
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
H S 0 to 20ppm
2
H S 0 to 50ppm
2
H S 0 to 100ppm
2
CO 0 to 100ppm
CO 0 to 200ppm
CO 0 to 500ppm
Cl 0 to 5ppm
2
Cl 0 to 15ppm
2
O 0 to 25% V/V
2
NH 0 to 50ppm
3
NH 0 to 1000ppm
3
H 0 to 1000ppm
2
H 0 to 10000ppm
2
SO 0 to 15ppm
2
SO 0 to 50ppm
2
NO 0 to 100ppm
NO 0 to 10ppm
2
NO 0 to 50ppm
2
power.
(default 2mA) to avoid false alarms.
Recommended
Test
Concentration
10ppm
20ppm
50ppm
50ppm
100ppm
250ppm
3ppm
10ppm
19% V/V
25ppm
500ppm
500ppm
3000ppm
10ppm
20ppm
50ppm
5ppm
20ppm
Table 6
31
SPXCDHMRTEN Issue 1
Application Operating Temp.
Time Minutes
3 mins
3 mins
3 mins
3 mins
3 mins
3 mins
10 mins
10 mins
1 min
10 mins
10 mins
3 mins
3 mins
5 mins
5 mins
5 mins
5 mins
5 mins
Min. Max.
-20°C +50°C
-20°C +50°C
-20°C +50°C
-20°C +50°C
-20°C +50°C
-20°C +50°C
-20°C +50°C
-20°C +50°C
-15°C +40°C
-20°C +40°C
-20°C +40°C
-5°C +40°C
-5°C +40°C
-15°C +40°C
-15°C +40°C
-5°C +40°C
-15°C +40°C
-15°C +40°C