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HPM-2002-OBEVacuum Gauge Page 6 of 39
1.5. HPM-2002-OBE RS232/485 Output Module
The RS232/485 module consists of a power conversion/sensor transducer board, microprocessor board and
a user interface option board. Serial communication is conducted via an RJ-11 type connector. With RS232
option (EIA-232 Rev. E) communication can easily be established between the module and the serial port of a
PC. The RS485 option allows the user to address multiple units and allows operation at distances of up to 4000
feet. The RS232/485 module includes a four digit floating-point LED display.
1.6. HPM-2002-OBE DeviceNet Module
The DeviceNet module consists of a power conversion/sensor transducer board, microprocessor board and
a user interface option board. All communication is conducted via a 5-pin “Micro” style with center pin, male
pin contacts. The module has passed the ODVA DeviceNet test and conforms to the vacuum/pressure gauge
device profile, an Electronic Data Sheet (EDS) with limited features is also available upon request.
1.7. Specifications
Measuring range ............................................................................................................. 1x10
-4
to 10
+3
Torr
.............................................................................................................................. 1.3x10
-4
to 1.3x10
+3
mbar
Accuracy (N2, T=23°C) .................................................................. + 20% of reading (1 x10
-3
to 50 Torr)
............................................................................................................ + 1.5% of reading (50 to 1000 Torr)
Ambient temperature operating range........................................................................................... 0° to 50°C
Process control ......................................................... 2 TTL outputs (1 TTL remote zero command input)
Digital readout ....................................................................................................................... Four digit LED
Equipment operating ranges ....................................................................................................... 12-30 VDC
Transducer mounting ............................................................................ Any position without recalibration.
Transducer internal volume .............................................................................................................. < 1.5 cc
Wetted material ...................................................................................................... Au, Si3N4, Si, Pyrex
TM
,
.................................................................................................................... Kovar
TM
, 316 stainless steel and
.................................................................................................... High Temp/Low Outgassing UHV Epoxy
Weight (OBE & HPM-2002s tube) .......................................................................... 12 oz (1/8” NPT tube)
Calibrated for nitrogen ..................................................... Conversion Factors for other gases are selectable
Burst Pressure (Tube) ...................................................................................................................... 150 psig
Proof Pressure (*) .............................................................................................................................. 30 psig
Nominal Operating Pressure (Tube) .............................................................................. 1x10
-4
to 10
+3
Torr
Input Operating Range ........................................................................................................ 11.5 to 30 VDC
Input Power .................................................................................................................... 24 VDC @ 125 mA
* Maximum pressure above which may cause permanent damage.