Thommen HM28 - Maintenance and Calibration; Battery Changing Procedure; Recalibration Recommendations; Technical Specifications

20
setrecint_30m * 235 CR (tab)ok * 13 CR setrecint_60m * 238 (tab)ok setautooff_man * 198 CR (tab)ok * 13 CR Select autom. cut-out time (minutes) setautooff_1 * 187 (tab)ok setautooff_10 * 235 (tab)ok setautooff_60 * 240 (tab)ok setdamp_off * 115 CR (tab)ok * 13 CR Damping off setdamp_on * 21 (tab)ok Damping on setdisrate_2.5 * 23 CR (tab)ok * 13 CR Set rate of display (Hz) setdisrate_5 * 183 (tab)ok setunit_perh * 5 CR (tab)ok * 13 CR Tendency .../h setunit_permin * 225 (tab)ok Tendency .../min
(tab)[er] * 10 CR Error
Control commands/syntax Answer from HM28/syntax Description
Note: The character _ indicates a space
3.6 Battery changing
- Open battery compartment
- Fit 9 V-alkali battery (IEC 6LR61) or
accumulator
Ensure correct polarity!
Dispose of the used battery
correctly and according
to environment regulations!
3.7 Calibration
Recalibration is only to be carried out by
specialist staff.
Relevant instructions are obtainable from
REVUE THOMMEN AG on request. We
recommend that you have the instrument
recalibrated at least once per year.
4 Specifications
4.1 Technical data
Measuring media instrument air or
inert gases
Media-compatible all media compatible
execution with stainless steel
18/8 (DIN 1.4305)
Units
25 mbar to 7 bar mbar, bar, Pa, kPa,
hPa, mmH
2
O,
mmHg, psi, inH
2
O,
inHg, (7 bar MPa)
10 bar to 30 bar mbar, bar, kPa, hPa,
MPa, mmH
2
O, psi,
mmHg, inH
2
O, inHg,
70 bar mbar, bar, kPa, MPa,
mH
2
O, psi, inH
2
O