VAT 653 Series - Page 76

INSTALLATION Series
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76/129 Edition 2019-05-03 963283EA
data length 8 characters
a 0 = no sensor
1 = 1 sensor operation (sensor 1 input)
2 = 2 sensor operation with automatic changeover
(low range = sensor 2 input, high range = sensor 1 input)
3 = 1 sensor operation (sensor 2 input)
4 = 2 sensor operation with automatic changeover
(low range = sensor 1 input, high range = sensor 2 input)
Remark: Sensor operation modes 2, 3 and 4 are possible with 2 sensors
(653 . . - . . . H - . . . . and 653 . . - . . . W - . . . .) only.
Remark: For applications where the high range sensor is used for for
monitoring purpose only, select sensor operation modes 1 or 3 for pressure
control with low range sensor and read high range sensor from
«SENSOR 2 READING» resp. «SENSOR 1 READING».
b 1 = ZERO enabled, 0 = ZERO disabled
cdefgh High range / Low range sensor full scale ratio * 1’000 (1000 … 100000).
In case of a 1 sensor valve use any value within the valid range.
This function does the sensor configuration.
Above picture shows a 2 sensor system. In this configuration sensor 2 covers low range (100 mTorr) and sensor 1
covers high range (1 Torr). RANGE CONFIGURATION for PRESSURE resp. SENSOR READING is set to
1000’000. Switchover between sensors is done automatically.
Setup function
Command Acknowledgement
Description
0
-
10V
High range
sensor
Low range
sensor
0
-10V
SENSOR 1 READING
0 – 1000’000
100 mTorr
1 Torr
0 mTorr
SENSOR 2 READING
0
– 1000’000
PRESSURE
0 – 1000’000