Specifications

Multi-Zone Gas Monitors
P/N: 3015-5074 Rev 10 61
B.3.13. Sensor Data Register 0x0016h (22 Dec) (R, 82 Bytes)
Variable Type Length Description
Pressure Float 4 Manifold Pressure is PSIA
P_Volts Float 4 Pressure sensor output Voltage
Vacuum_P Float 4 Pressure with all value closed and pump on in PSIA
Ambient_P Float 4 Absolute Ambient Pressure in PSIA
Box_T Float 4 Enclosure Temperature in Degrees C
Box_T_Volts Float 4 Box temp sensor output voltage
Bench_T Float 4 Optical bench temperature in Degrees C
Bench_T_Volts Float 4 Bench temp sensor output voltage
Bench_Z_T Float 4 Optical bench temp in degrees C at last zero interval
Box_Z_T Float 4 Box temp in degrees C at last zeroing
PkPk_int UI 2 Current peak to peak A/D counts from detector
PkPk Float 4 Current peak to peak voltage from detector
Ave_PkPk Float 4 Running average voltage from detector
Zero_PkPk Float 4 Voltage measured at last zeroing
Noise Float 4 Largest Change in running average
AU Float 4 Current absorbance value
Ave_AU Float 4 Running Average of absorbance level
Bench_PPM Float 4
PPM in bench based on zone gas selection (uncorrected for
pressure and temperature)
STP_PPM Float 4 PPM corrected to STP (1 atm, 25 deg C)
Bench_UML Float 4 Micromoles/liter in bench (uncorrected)
Ambient_UML Float 4 Micromoles/liter corrected to ambient pressure
B.3.14. Release Zone Hold Register 0x0017h (23 Dec) (W, 10 Bytes)
Variable Type Length Description
Rel_Hold * * See description of STATUS REGISTER
B.3.15. Hold Zone Register 0x0018h (23 Dec) (W, 10 Bytes)
Variable Type Length Description
Zone_Hold * * See description of STATUS REGISTER
B.3.16. MZ Hold Mode
The MZ monitor can be made to hold or “dwell” on a particular zone if necessary. The length of the hold
time is defined by the HOLD TIME parameter in the System Data Register.
Placing the MZ Monitor into hold mode:
1. Read the MZ Status Register (0x0011h)
2. Modify the content of the status register structure to change the MODE parameter to zone hold
mode. Active zone parameter to the zone you wish to hold
3. Send this updated status register structure back to the MZ using PRESET MULTIPLE REGISTER
COMMAND to the HOLD ZONE REGISTER (0x0018h).
Releasing the Zone Hold
1. Read the MZ monitor Status Register (0x0011h)