MicroRAE User’s Guide
57
Year Of Manufacture
To identify the year and month of manufacture, refer to the two digit marking placed
adjacent to the serial number on the instrument label according to the following table:
Year
First digit
Year code
Month
Second digit
Month code
2014
R
January
1
2015
S
February
2
2016
T
March
3
2017
U
April
4
2018
V
May
5
2019
W
June
6
2020
A
July
7
2021
B
August
8
2022
C
September
9
2023
D
October
A
2024
E
November
B
2025
F
December
C
Example: “RA” indicates that the monitor is manufactured in the month of October in the
year 2014.
Standard Span Values For Sensors
Sensor
Standard Span Values
CO
50 ppm
H
2
S
10 ppm
OXY
18.0 %
LEL
50 %LEL Methane
HCN
10 ppm
