Thommen HM28 - Measurement Ranges and Resolution; Operating Conditions and Power; Conversion Factors and Units

21
e
25 mbar
1)
d,g 0.001 125 mbar
70 mbar
1)
d,g 0.01 350 mbar
200 mbar
1)
d,g 0.01 1500 mbar
300 mbar
1)
d,g 0.01 1500 mbar
500 mbar
1)
d,g 0.1 4000 mbar
1000 mbar
1)
d,g 0.1 4000 mbar
1100 mbar a 0.1 4000 mbar
2000 mbar
1)
a,d,g 0.1 7000 mbar
7 bar
2)
a,d,g 0.001 17 bar
10 bar
3)
d,g 0.001 27 bar
17 bar
3)
d,g 0.001 27 bar
30 bar g 0.01 70 bar
70 bar g 0.01 140 bar
Media-compatible types
1000 mbar g 0.1 2000 mbar
2000 mbar g 0.1 4000 mbar
7 bar g 0.001 14 bar
10 bar g 0.001 34 bar
17 bar g 0.001 34 bar
30 bar g 0.01 70 bar
70 bar g 0.01 140 bar
Conversion factors
1 mbar = 0,1 kPa
1 mbar = 0,0010 bar
1 mbar = 10,20 mmH
2
O
1 mbar = 0,7501 mmHg
1 mbar = 0,0145 psi
1 mbar = 0,4015 inH
2
O
1 mbar = 0,02953 inHg
1 mbar = 1,0 hPa
max. loading capability
Resolution
Type of pressure
Measuring
range
Linearity, hysteresis and
repetition accuracy
(10 °C to 35 °C) ± 0,2 % F.S.
(standard) ± 1 digit
± 0,1 % F.S.
(option) ± 1 digit
± 0,05 % F.S.
(option) ± 1 digit
(according to
measuring range)
Operating temperature -5 °C to 50 °C
Storage temperature -20 °C to 60 °C
Humidity 30 to 95 % rH
Case protection class IP 54
Power supply 9 V-battery (IEC
6LR61) or
accumulator
regulated plug-in
mains supply unit
(7 to 14 VDC)
Current consumption <9 mA
Baud rate RS232 9600/4800/2400/
1200 baud
Measuring rate in RS232- mode
-Class 0,2 20 measurements/s
-Class 0,1 and 0,05 10 measurements/s
Measuring rate, 2 ½ or
normal mode 5 measurements/s
Memory capacity max. 964
measured values
Memory interval manual,
1,5,10,20,30,60 s
2,3,5,10,30,60 min
Display LCD matrix,
2 lines of 16
characters
Pneum. connection hose 4/6 mm or
NPT 1/8"
Case dimensions 152x83x34/29 mm
Weight incl. battery 270 g
4.2 Measuring ranges
a = absolute pressure
d = differential pressure
g = relative pressure
1) max. pressure statically = 7 bar
2) max. pressure statically = 17 bar
3) max. pressure statically = 27 bar