Manual

IN-E-HL-NT-V2_12

Rotronic AG

Bassersdorf, Switzerland

Document code

Unit

HygroLog HL-NT data logger:

instruction manual

Instruction Manual

Document Type

Page

41 of 48

Document title

10. HygroClip probe adjustment procedures

10.1 Single Point adjustment

Definition

The Single-Point function permits to do a 1-point adjustment (temperature or humidity) of a

ROTRONIC HygroClip 2igital probe against a known reference environment. This function is

limited to a simple offset adjustment that is applied across the entire measuring range.

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 but may also be

detrimental to accuracy at other conditions.

Procedure

IMPORTANT: always adjust temperature first (if temperature needs to be adjusted)

Wait for the probe to be at equilibrium before using the ADJUST function.

Use the UP or DOWN key to highlight any menu item. Press on the ENTER key to select the

menu item. Only the value of the item is highlighted. Use the UP or DOWN key to review the

available choices or to change a numerical value. When the desired selection or value is

displayed, press on the ENTER key. The entire line corresponding to the menu item is highlighted

again. Make the appropriate selections from the ADJUST menu:

● Probe: name of the probe to be adjusted (custom name specified by user)

To change the probe, use the up or down arrow key to highlight probe and press ENTER. Use

the arrow keys to change the probe and press ENTER to confirm the selection.

● Adjust: select here the parameter to be adjusted

Humidity: humidity adjustment against a stable environment of known value.

Humi RHS: humidity adjustment against a ROTRONIC certified standard 1)

Temperature: temperature adjustment against a stable environment of known value.

1) For adjusting humidity, ROTRONIC offers convenient, certified humidity standards to

generate known humidity values (see separate probe calibration manual).

● Mode: select Single Point

● RefValue: Use the UP or DOWN key to change the numerical value of the reference to be used

for the adjustment. For a faster change of the numerical value, keep the key pressed down. If

using a ROTRONIC humidity standard (Humi RHS), use the mean value (at 23 C) written on

the certificate supplied with the standard.

Note: in the RHS mode, the software automatically compensates for the effect of temperature

on the humidity standard. No additional correction is required.

● ADJUST: highlight this menu item and press on ENTER to do the adjustment