ROTRONIC HygroLog HL20 - Manual (Page 15)

IN-E-HL20-V1_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroLog HL20 and HL21 data logger:
User Guide Instruction Manual
Document Type
Page 15 of 17
Document title
© 2010-2011; Rotronic AG IN-E-HL20-V1_12
Temperature measurement HL20 / HL21
Sensor Pt100 RTD, IEC 751 1/3 class B
Measuring range -10...60°C
Measurement accuracy at 23 °C ±0.2 °C
Repeatability 0.05°C
Long term stability < 0.1°C / year
Response time Typical 10 min. (depends on air flow)
Calculated parameters
HL20
Psychrometric calculations Dew or frost point (user configurable setting)
Start-up time and data refresh rate
HL20 / HL21
Start-up time 1.9s (typical)
Data refresh rate 1.7s (typical)
Data recording and download
HL20 / HL21
Recorded parameter(s) HL20: relative humidity and temperature, HL21: temperature
Recording media Internal EEPROM non volatile, not removable
Recording capacity HL20: 20,000 value pairs, HL21: 20,000 values
Real time clock Yes, adjustable via PC
Logging modes
Start-stop (recording stops when memory is full
Loop: oldest data is dumped to make room for latest data
Log interval Min. 5 sec, up to1 hour in 5 sec. increments
Interface for data download Internal connector, located under protective cover
Service and data connector HL20 / HL21
Interface type UART (Universal Asynchronous Receiver Transmitter)
Maximum service cable length 5 m (16.4 ft)
General specifications HL20 / HL21
Optional display LC, 1 or 2 decimals resolution, backlight, alarm and low battery indication
LED indicator
5 sec, green flash when recording data
5 sec. red flash for out-of-limit value or logger problem
Housing material ABS
Housing protection grade HL20: IP 40, HL21: IP65
Overall dimensions 130 x 72 x 32 mm (5.1 x 2.8 x 1.3 ”)
Weight About 210 g (7.4 oz)
Conformity with standards HL20 / HL21
CE / EMC immunity
EMC Directive 2004/108/EG: EN 61000-6-1: 2007, EN 61000-6-2: 2005
EN 61000-6-3: 2007, EN 61000-6-4: 2007
Solder type Lead free (RoHS directive)
FDA / GAMP directives compatible