ROTRONIC HygroLab C1 - Manual (Page 23)

E-M-HyLabC1-V1
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroLab C1 bench-top indicator:
User Guide
Instruction Manual
Document Type
Page 23 of 28
Document title
© 2011; Rotronic AG E-M-HyLabC1-V1
7 Probe Calibration and Adjustment Procedures
7.1 Overview
The HygroLab C1 uses two distinct and separate procedures:
1) Acquisition and capture of calibration points to the memory of a probe or device
2) Adjustment of the probe or device based on the calibration points present in the probe or device
memory
When the purpose is just to calibrate the probe or device, use only procedure 1. Up to 2 temperature
calibration points and up to100 humidity calibration points can be held indefinitely in the probe or device
memory. No calibration point is saved within the HygroLab C1 itself. A calibration protocol can be printed with
the HW4 software. Either the HW4 software or the HygroLab C1 can be used at any time to delete unwanted
calibration points from the probe or device memory.
Adjustment can be carried out at any time after calibration, even several days later. Adjustment is a purely
electronic process based on memorized data and the probe or device does not need to be exposed to any
specific environment.
Notes:
o Instructions for using the ROTRONIC calibration devices and humidity standards are provided in
document E-M-CalBasics
o Probe adjustment is available in the water activity mode, but when using this function humidity is
shown as %RH as opposed to a
w
.
7.2 Calibration against a reference environment
Connect the probe to be calibrated to the HygroLab C1. Expose the probe to a known environment (or to a
humidity standard or to a saturated salt solution) and wait for full equilibrium.
o Press the UP or the DOWN key and select the probe input to which the device is connected.
o Press MENU and select Probe Actions. Press ENTER to activate the menu.
o Use the DOWN arrow key to select either “Humi Adjust” or “Temp Adjust” (in any order).
o Press ENTER to confirm and open the next sub-menu. Use the DOWN arrow key to select the
“Acquire (Ref. Value)” menu item and press ENTER to confirm.
o Humi Adjust: the HygroLab C1 displays both the current humidity read by the probe to be calibrated
and the reference humidity (known environment). Use the DOWN key to highlight the reference value
and press ENTER. Use the UP or DOWN arrow key to change each digit. Press ENTER to move the
cursor to the right. When done, press ENTER to save the value. Use the DOWN arrow key to select
. Press ENTER to activate the Acquire function. Press ENTER to confirm and save the
calibration point to the probe memory. The HygroLab C1 automatically exits the menu.
o Temp Adjust: the HygroLab C1 displays both the current temperature read by the probe to be
calibrated and the reference temperature (known environment). Use the DOWN key to highlight the
reference value and press ENTER. Use the UP or DOWN arrow key to change each digit. Press
ENTER to move the cursor to the right. When done, press ENTER to save the value. Use the DOWN
arrow key to select . Press ENTER to activate the Acquire function. Press ENTER to
confirm and save the calibration point to the probe memory. The HygroLab C1 automatically exits the
menu.
Note: the procedure can be repeated with different reference environments so as to accumulate several
calibration points (temperature: maximum 2 points, humidity: maximum 100 points).