Dwyer HM35 - Manual (Page 21)

Notes
• The calibration is always carried out in mbar.
• The calibration must take place at a stable room temperature of 22 °C ± 2 °C.
• A calibration value will only be accepted if it lies within ± 5 % of the full-scale
value of the HM35.
• With the pressure connections open, it is possible to only re-calibrate the zero point.
• The date of the last calibration will be stored in the Calibration History.
• In case of manual re-calibration, the previous measurement will become invalid.
You should always carry out a complete accuracy check afterwards.
4 Specifications
4.1 Technical
data
Measuring media
Instrument air or inert gases
Media-compatibility all media that is compatible with stainless steel 18/8
(DIN 1.4305)
Linearity, hysterisis and according to measuring range and use
repeatability accuracy See Table 4.2
Units according to measuring range and use
See Table 4.3
Operating temperature 0 °C to 50 °C
Storage temperature -20 °C to 60 °C
Humidity max. 95 % rH. (non-condensing)
Case protection IP 54
Power supply • 3 x 1,5 V Mignon-cell AA, IEC LR6 or accumulator
• regulated 6 VDC plug-in mains supply unit
(min. 6, max. 9 VDC
Current consumption < 25 mA
without display light, IR and beeper
Battery life approx. 90 hours
Infra-red interface serial IR-protocol
Measuring rate max. 25 measurements/s (Data logging, IR)
5 measurements/s (normal operation)
Display rate 2 measurements/s
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