Honeywell VA201T - Page 11

Calibration Handbook
11VA201T / VA201M
Then adjust the span potentiometer to read the following value:
Span Gas Value x Factor x 2.5 = Calibration value (in VDC) (+/- 3 % of the scale)
Full scale
VA201T/M CALIBRATION INFORMATION - Q1 Sensor
Gas (Q1) Sensor
VA201T
Scale
VA201M
Scale
Warm-Up Factor
Zero
Pot
Span
Pot
Flow Rate
L/min
Notes
CL2
SCL2-7CLH
SCL2-S7
15.3 ppm 15 ppm 5 min. - - 2 0.5
CO SCO-4BW 0 - 255 ppm 0 -250 ppm 5 min. - - 2 0.5
Combustible SCH4-VQ21TB 0 - 102% 0 -100% 5 min.
Table
13
3 2 0.5
1% Volume CH4 =
20% LEL CH4
ETO SETO-7ETO 0 – 20.4 ppm 0 – 20ppm 5 min. * - 3 2 1
* If no backup
circuit for the
sensor, 7 day
warm up required
H2 SH2-3HYE 0 - 2.5 % 0 - 2.5 % 5 min. - - 2 0.5
H2S SH2S-7HH 0 - 51 ppm 0 - 50 ppm 5 min. - - 2 1
HCL SHCL-7HL 0 -51 ppm 0 - 50 ppm 5 min. * - 3 2 1
* If no backup
circuit for the
sensor, 7 day
warm up required
HCN SHCN-7HCN 0 - 51 ppm 0 - 50 ppm 5 min. - - 2 1
NH3 SNH3-1000S 0 - 102 ppm 0 -100 ppm 1 hour - 3 2 0.5
NO SNO-7NT 0 - 102 ppm 0 -100 ppm 5 min. * - 3 2 1
* If no backup
circuit for the
sensor, 7 day
warm up required
NO2 SNO2-B1 0 – 10.2 ppm 0 – 10 ppm 5 min. - 3 2 1
O2 SO2-4OX 0 – 25.5% 0 – 25% 5 min. ** - - 2 0.5
** If no backup
circuit for the
sensor, 24 hour
warm up required
SO2 SSO2-7SH 0 – 10.2 ppm 0 – 10 ppm 5 min. - - 2 1
Smoke SCO-7EF 0 -35.7 ppm 0 - 35.7 ppm 5 min. - - 2 0.5
VA201T/M CALIBRATION INFORMATION - Q2 Sensor
Gas (Q2) Sensor
VA201T
Scale
VA201M
Scale
Warm-Up Factor
Zero
Pot
Span
Pot
Flow Rate
L/min
Notes
C3H8 SQ2-COMB 0 -102% 0 - 100% 15 min. - 2 1 0.04
CH4 SQ2-COMB 0 -102% 0 - 100% 15 min. - 2 1 0.04
1% Volume CH4 =
20% LEL CH4
CO SCO-MONOXC 0 - 255 ppm 0 - 250 ppm 5 min. - - 2 0.5
SQ2-FIG 24 hours 2 1 0.04
H2 SQ2-COMB 0 -102% 0 - 100% 15 min. - 2 1 0.04
1% Volume H2 =
25% LEL H2
Refrigerant SQ2-FREON 0 - 1020 ppm 0 -1000 ppm 24 hours 1.2 2 1 0.04
500 ml/min = 30 l/h on regulator