User Guide

Copyright HK Instruments 2021 www.hkinstruments. User guide version 1.0 2021
Page 6
Step 5: Offset
1) Press to enter the sengs menu.
OK
2) Choose Oset.
OK
+
–
Settings
Modbus
Offset
Outputs
4) Choose Exit to exit the Outputs menu.
• Scroll to Exit and press to return to the
sengs menu or keep the buon down to
return to the basic view.
OK
OK
OK
+
–
Outputs
Out3 CO2
Out4 TVOC
ug/m3
Exit
Figure 4c
Measurement Default limits Adjustable low limit Adjustable high limit Smallest range available
Celsius
1*
0.0...50.0 °C 0.0...45.0 °C 5.0...50.0 °C 5.0 °C
Fahrenheit
1*
32...122 °F 32...113 °F 41...122 °F 9 °F
CO
2
400...2000 ppm 0...1900 ppm 500…2000 ppm 100 ppm
Humidity 0.0…100.0 % 0.0…90.0 % 10.0…100.0 % 10.0 %
TVOC ppm 0.00…30.00 ppm 0.00…28.00 ppm 2.00…30.00 ppm 2.00 ppm
CO
2
EQ 400...2000 ppm 0...9900 ppm 500…10000 ppm 100 ppm
TVOC µg/m
3
0…3000 μg/m3 0…9900 µg/m3 100…10000 µg/m3 100 µg/m3
PM (all)
2*
0...500 μg/m3 0...480 μg/m3 20…500 μg/m3 20 μg/m3
Table 1 - Output limits
Outputs continued
OK
+
–
Offset
CO2 0
Celsius 0.0
Fahrenheit 0.0
OK
+
–
Offset
Celsius
2.0
Figure 5a
Figure 5b
3) Choose oset value for every measurement.
• The Oset menu and limits can be scrolled by
pressing the and buons. Choose the
measurement and set the limits by pressing the
buon.
See Table 2 - Oset limits.
+
–
OK
The oset feature enables eld calibraon. This is necessary in
applicaons that need annual calibraon.
1*) Celsius and Fahrenheit limits are interdependent, and thus a change in one limit of a measurement will also change the
limits of the other measurement.
2*) PM2.5, PM2.5 hour and PM2.5 day share the same limits.
PM10, PM10 hour and PM10 day share the same limits.
Changing one limit will also change the limits of the two other measurements.