IN-E-HyFlex-V4_10
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
Instruction Manual
Document Type
HygroFlex transmitter version 4: instruction
manual
Document title
Page
37
of 61
© 2006; Rotronic AG IN-E-HyFlex-V2_10.doc
When the probe is at equilibrium, activate the Adjust 1PT function and make the appropriate
selections:
a)
RHS
: press the ENTER key to select this item. The LC display shows the value of the standard
(for example 35.0%RH) on the top line and “Humidity RHS” on the message line. Verify that the
value agrees with the standard being used. If necessary, change the value of the standard with
the UP or the DOWN key. Press the ENTER key when done.
Note: the software automatically compensates for the effect of temperature on the humidity
standard. No additional correction is required.
b)
Humidity or Temperature
1
: press the ENTER key to select. The LC display shows the
value read by the probe at the time the ENTER key was pressed. The word “humidity” or
“Temperature” is shown on the message line. Use the UP or the DOWN key to change the
humidity or temperature value to the value of the reference environment. For a faster
change, keep the key pressed down. Press the ENTER key when done.
1
1-point temperature adjustment: limited by the firmware to -20…< 40°C (-4…<104°F)
After pressing the ENTER key, the message “sure?” should appear on the LC display. Press
ENTER to confirm. Next, the LC display will confirm that the probe adjustment has been
successfully completed. At that time, press ENTER to exit.
Note: you can exit the function at any time (without calibrating the probe) by pressing the MENU
key.
7.5 ADJUST REF
Definition
Note: this function is not available with the HygroFlex 1 (single probe input).
When two ROTRONIC HygroClip digital probes are connected to the HygroFlex, the Adjust REF
function permits to do a 1-point adjustment (both humidity and temperature) of probe 1, using
probe 2 as a reference.
To prevent unauthorized or accidental changes, access from the keypad to
this function can be blocked out (software configuration).
Warning: a 1-point adjustment is no substitute for a full calibration (2 or more points). Doing a 1-
point adjustment can improve accuracy over a narrow range of conditions and may also be
detrimental to accuracy at other conditions.
Procedure
Expose both probes to the same stable environment. Ventilation of the probes is highly
recommended. Observe the readings from both probes for complete equilibration with the
reference environment.
Press the ENTER key to enter the function. The display asks you to wait for a short time and then
shows the temperature and humidity read by the reference probe at the time the ENTER key was
pressed. Note that these values are not updated to the display as long as the function is active.
