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HPM-2002-OBEVacuum Gauge Page 8 of 39
• Maximum relative humidity: 80% for temperatures up to 31°C decreasing linearly to 50% relative
humidity at 40°C.
• Installation category II
HPM-2002-OBE
CABLE PINOUT
Analog Ouput Analog Ouput Digital Output
Pin
No.
0-10 Volt 4-20 mA RS232/485
1 High Setpoint Output High Setpoint Output High Setpoint Output
2 Low Setpoint Output Low Setpoint Output Low Setpoint Output
3 Power Input (+12 to 30 VDC) Power Input (+12 to 30 VDC) Power Input (+12 to 30 VDC)
4 Power Return Power Return Power Return
5 Channel 1 Vout (+) Channel 1 Iout (-) NC
6 Analog Return Analog Shield NC
7 Channel 2 Vout (+) Channel 2 Iout (-) NC
8 Digital Ground Digital Ground Digital Ground
9 Remote Zero Remote Zero Remote Zero
10 NC Channel 1 Iout (+) NC
11 NC Channel 2 Iout (+) NC
12 NC NC NC
13 NC NC NC
14 Rx In (Internal Use) Rx In (Internal Use) NC
15 Tx Out (Internal Use) Tx Out (Internal Use) NC
2.5. Initial Operation
Upon applying power to the control unit a pressure measurement will be given in Torr for nitrogen.
However, it is recommended that the user follow the instructions for zeroing and adjusting the output at
atmosphere.