Test
Rotronic HygroPalm AW1
EminTech
+ good design
+ reliable results
+ flexible
- inadequate low battery
voltage warning
- bad manual routines
| Links | |
| Swe.agent | |
| Price € | ~ 1 500 |
| Sensor | AwVC-DIO |
| Specification | |
| Accuracy | 0.005 aw +1.5% of read |
| Range | 0 - 1.000 aw |
| Calibration | |
| Instructions | Yes* |
| Samples | ~ € 40 / 5 |
| Own media | Yes |
| Other | |
| Manual | Yes* |
| in Swedish | No |
| Computer interface |
No |
| *The manual can be found here. | |
The design was very good realized. Both visual appearance and technical function were impressing. Both the sample cell and the instrument suited their purposes well. One example of good design was a small fan that increased convection in the measurement cell.
The software of the device was quite satisfying. It was possible to choose different measurement modes, either continuous or terminated when adjustable criteria (change in aw per minute) was reached. An extrapolating result calculation that worked better than expected was also included.
Manual
No manual was submitted by the Swedish agent. After request, however, a dense information sheet in English was submitted.
A better manual in English was found at this internet address:
http://www.rotronic-usa.com/datasheets/manuals.htm.
Calibration
Calibration was easily performed by pushing buttons according to description in the manual.
Measurement results
The measurements were easily accomplished and gave stable results as seen in the diagram, below.
Other
The main disadvantage with this instrument was caused by decreasing battery voltage. When battery voltage fell, the measurement results decreased at least 0.01 aw. A warning of low voltage appeared at the instrument display significantly later after a decrease in aw was noted.
