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Sensor Alignment
RH Sensor Alignment
15
Sensor Alignment
For highly accurate measurement readings, you should align your QUESTempº 48N prior to
data logging or event logging/recording. For the RH sensor, it is recommended to align with
a High concentration level using the 75% sensor salt, NaCl (sodium chloride), or a Low
concentration level using the, the 33% sensor salt, MgCl (magnesium chloride). (To order
sensor alignment salts, refer to an online vendor such as, colepalmer.com.)
RH Sensor Alignment
1. To open, navigate to the main menu and select View by pressing I/O Enter key (see
A). A measurement screen will appear (see B).
Figure 1-24: Main menu with view selected (A) & measurement screen (B)
2. Press and hold I/O Enter key and then press Down Arrow key from the View menu.
The Alignment screen will appear.
Figure 1-25: Alignment screen
3. Press Up/Down Arrow key to select either High or Low. Then press I/O Enter key.
4. Remove (or slide) the Sunshield (white globe) from the RH sensor and place it to the
side. (See Figure 1-26).
5. Place a latex finger cot (user supplied) over the humidity sensor in order for the sensor
to stabilize quicker about 15 minutes (or up to 60 minutes without).
Note: latex finger cots
can be found at various hardware stores or online such as colepalmer.com.
Figure 1-26: Sunshield & placement of finger cot prior to RH alignment
“High” is selected when the arrow
appears in front of the text.
(RH Sensor) Alignment menu
Place unrolled finger cot, with a small
hole cut in the top, so it is completely
stretched over the humidity sensor.
Sensor alignment
(A)
(B)
Note: WBGT is not used in sensor alignment
Sunshield:
Slide off RH
sensor to
remove.