Brooks Instrument XacTorr CMX160 - Manual (Page 38)

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7.0 CMX MODELS WITH EXTENDED RANGE CAPABILITY
7.1 CMX WITH EXTENDED RANGE
The CMX can be configured with Extended Range (ER) Calibration. The ranges
that are currently supported for extended range calibration are 10T, 50T, and
500T. Legacy CMX devices are calibrated from 10% to 100% of full-scale
pressure (over one pressure decade). The Extended Range CMX is calibrated
from 1% to 100% of full-scale (over two pressure decades).
7.2 EXTENDED RANGE ACCURACY SPECIFICATION
The accuracy specification for Extended Range is shown in Table 13:
Dual-decade or extended range calibration enables the CMX to meet strict
accuracy specifications in the second pressure decade (1% to 10%) in addition
to the first decade (10% to 100%). Legacy gauges are only calibrated in the first
decade.
7.3 CMX EXTENDED RANGE CONNECTOR PIN-OUT
The pin-out for the extended Range CMX is shown in Table 14. Note that the
pin-out for the extended range device is very similar to the IN2 and IN3XP MFCs
with a DB9 connector. The wiring allows the user to use the CMX with the same
DB9 connector wiring that is used for IN2 and IN3XP MFCs.
CAUTION ! !
The CMXER connector wiring is NOT the same as the legacy CMX DB9 wiring.
Table 13: CMX Extended Range Accuracy Specifications
Inlet Pressure
Accuracy Specification CMXER (digital
mode)
1% to 10% 0.15% + 0.006% FS
10% to 100% 0.15% + 0.006% FS
Table 14: Extended Range Pin-out
Pin CMX Extended Range DB9
Connector Wiring
CMX Standard Connector
Wiring
IN2 and IN3XP Connector
Wiring (D/A)
1 Not Connected (N/A) Pressure Output Valve Voltage 0-5VDC
2 Pressure Output 0-10VDC Not Used Flow Output 0-5VDC
3 +15VDC Temperature status (TTL) +15VDC
4 Power Supply Common +15VDC Power Supply Common
5 -15VDC -15VDC -15VDC
6 Not Connected (N/A) Case Ground Setpoint 0-5VDC
7 Signal Common Remote Zero Signal Common
8 RS-485 Positive Signal Ground RS-485 Positive
9 RS-485 Negative Power Supply Common RS-485 Negative
7.0
_EXTENDED RANGE