Ashcroft GC31 - Digital Pressure Sensor - Manual (Page 10)

10
5. NOISE PREVENTION
Power Supply
The pressure display can fluctuate and provide incorrect output if noise is present in the
power supply/wire. Care should be taken to keep the GC31 power supply wires from high
voltage lines and use a power line with a high noise rejection ratio.
6. STORAGE
Store in a location in compliance with the environmental rating of the unit and within -30 to
+60C (-22 to 140F). Avoid direct exposure of the display to Sunlight.
7. MAINTENANCE
Although this is a solid state device, it is recommended that a visual inspection be conducted
twice a year along with regular zero adjustment if necessary.
8. MENU NAVIGATION
Functions
PLEASE NOTE: Do not use sharp objects to press the keys as this can puncture the panel.
See illustration for External Panel and Functions.
PNP Type Switch Function (wiring to photocoupler)
GC31 (Brown)
(Black-White)
80mA max.
(Blue)
Power (+)
Power (–)
Photo coupler
Open collector output
Electric current resistance
GC31 (Brown)
(Black-White)
80mA max.
(Blue)
Power (+)
Power (–)
Voltage HL output
(High/Low)
Pulldown resistance
PRESSURE SENSOR
OUT1
PSI
MODE
ADJ.
OUT2
Comparator/Switch Output Status LED
(OUT 1) (OUT 2)
MODE
MODE KEY DOWN KEY UP KEY
PNP Type Switch Function (voltage output)
I&M011-10170 GC31:layout 4/8/10 3:26 PM Page 10