Class1 Digital Air Minder User Manual
Page 8
page 8 of 8 pages
Engineering
Standards
Name
Identifier
Instructions
Engineering Standard Number
C1-102263-A
Digital Breathing Air Remaining System
1
2
3
4
8
7
6
5
DTM06-08SA
0462-201-20141 20 Ga.
Wire Insertion View
(ground) Switch
8
Pulses IN
7
Sensor Ground
6
System Ground
5
1
Alarm OUT (grund)
2
PSI IN
3
Sensor +5/10 VDC
4
System Power
The display does not illuminate.
The display must have power at terminal 4 and ground at terminal 5. With the
connector removed, check between pins 4 and 5 for 12 VDC, if 12 volts is present with
the correct polarity, replace the display. If voltage and/or ground is not present, check
the vehicle wiring and display harness terminations.
The air gauge has a single bar traveling back and forth across the display.
There is a problem with the pressure transducer (PN 102162) or wiring. At the
transducer connector, check for 10 VDC between the red wire and ground. This is sent
from the display and must be correct for the transducer to function. Connect the red wire
to the transducer and check for current at the black wire. This is a current (4-20mA)
7500 PSI transducer. With an empty tank, this voltage should be 4 mA and at 3000 PSI
approximately 10.5 mA., if it is not, replace the transducer. Check for current at the
display pin 2 signal). If there is no current, check the wiring from the transducer to the
display. If the current is present at pin 2, replace the display.