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PM600 and PM630 modules - Commands to adjust on-board barometer and/or Fast sensor with module in Cal Kit/Sled

 

See the article PMM - Pressure Measurement Module Calibration Kits for information on using a PMM Calibration Sled to send remote commands to a Pressure Measurement Module.

See the article 6270A COMPASS database for troubleshooting sensors for information on using a PMM Calibration Sled to send remote commands to a Pressure Measurement Module.

Note: This article only applies to PM600 and PM630 Pressure Measurement Modules. PM200, PM230 and PM500 modules do not have on-board barometers or fast sensors.

Note: Commands below are in quotes for clarity of what the full command is. Don't send quotation marks. 

The below commands are to be used when the module is installed in the PMM Calibration Kit (Cal Sled). If the module(s) are installed in a 6270A/8270A/8370A controller then see this article,
PM600 Fast Sensor Calibration Commands with Module in Controller

C0 (Pressure Adder for module's on-board barometer, if applicable)
To read C0 send “OFFSET_SET2?”
To set C0 send “OFFSET_SET2 x” where “x” is a decimal or integer

C1 (Pressure Multiplier for module's on-board barometer, if applicable)
To read C1 send “GAIN_SET2?” The return is a unit less decimal.
To set C1 send “GAIN_SET2 x” where “x” is a decimal (multiplier).

 
To read the module's on-board barometer current pressure (if applicable) send "VAL2?" command. The reply will be the value in the unit specified by PRES_UNIT command.

 

 

The following user command adjusts the fast “inner loop” sensor in a PM600 or PM630 module to the quartz sensor. There is no query form. The below commands are to be used when the module is installed in the PMM Calibration Kit (Cal Sled).

FAST_ZERO Request that the fast sensor be zeroed to the quartz sensor and saved to FLASH. This should be done when pressure is stable and close to atmosphere. See UCOEF_SET3[0] command to read the current offset value.

FAST_SPAN Request that the fast sensor be span adjusted to the quartz sensor and saved to FLASH. This should be done when pressure is stable and close to its maximum pressure. See UCOEF_SET3[1] command to read the current span value.

To read the module's fast sensor current pressure (if applicable) send "VAL3?" command. The reply will be the value in the unit specified by PRES_UNIT command. This command is not needed for calibrating the module's pressure output.

Whenever you make changes to settings with the Cal Sled you must send “CAL_STORE” to save to memory. If not, and power is cycled, the value will not be stored.

CAL_STORE
To save changes to memory send "CAL_STORE" command

 

The below commands are to be used when the module is installed in the controller (not the Cal Sled). The following user command adjusts the fast “inner loop” sensor in a PM600 or PM630 module. There is no query form. 

The chassis commands are:
CAL:PRES<n>:VAL1 <atmosphere>   (with sensor open to atmosphere, <atmosphere> is the reference pressure)

CAL:PRES<n>:VAL2 <pressure>        (with sensor at full scale, <pressure> is the reference pressure)

CAL:PRES<n>:SAVE                          (saves the new values)

where <n> is determined by the slot of the module plus 8 (for fast sensor):
8 for Slot 1
18 for Slot 2
28 for Slot 3
38 for Slot 4
48 for Slot 5

The command to read the fast pressure sensor is below, where x is the slot number; slot 1=8, slot 2=18, slot3=28, slot4=38, slot 5=48. The below command is to be used when the module is installed in the controller (not the Cal Sled).

meas:presx?

The command to read the on-board barometer is below, where x is the slot number; slot 1=2, slot 2=12, slot3=22, slot4=32, slot 5=42. The below command is to be used when the module is installed in the controller (not the Cal Sled).

meas:presx?

The command to read the displayed pressure is below, where x is the slot number; slot 1=5, slot 2=15, slot3=25, slot4=35, slot 5=45. The below command is to be used when the module is installed in the controller (not the Cal Sled).

meas:presx?

 

 

 

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