Page 198
STAT
IM 2000/2000S
Service Guide
96-106775 Rev 5.0
9. Solenoid Valve and Pressure Transducer
Identifying the transducer type
The pressure transducer may be identified in two ways:
• by the identification code etched on the side of the upper casing of the transducer
• by the voltage output signal
To identify the pressure transducer by identification code, proceed as follows:
Locate the identification code on the side of the transducer casing. Note that there are several
lines to the code. The relevant line of code should contain 9 digits, similar to the following
example:
0060AeFY1
. The second and third digits in the code identify the pressure range of the
transducer and will be
60
or
68
.
Tip: the zero in the identifier has a diagonal line through it. 60 may easily be mistaken for 68, so
take care when checking the identifier. A magnification device may help.
To identify the pressure transducer by output voltage, proceed as follows:
To measure the voltage output, power up the machine with out a cassette out (so that the machine
is measuring atmospheric pressure). Set a multimeter to ‘DC volts’ and check the reading across
the terminals of the BLUE P1-1 ‘SIG’ (signal) and BLACK P1-3 ‘GND (ground) wires leading from
the pressure transducer, at their terminations on the main PCB (Revision 7) or the interface board
(all other PCB revisions). Check the atmospheric pressure reading on an independent reference
pressure meter. The voltage reading for the appropriate pressure reading should be approximately
the value as shown in the table (Figure 5) below for the relevant pressure transducer.
IMPoRTANT:
This identification method is only a guide. Performing a voltage comparison
may not be accurate if the pressure transducer is damaged, a high offset value has been
applied to it as a result of calibration, the reference voltage is incorrect (n/a revision 7 PCB) or if
the unit is installed at high altitude. A more accurate reading can be achieved by finetuning the
unit as per the instructions below ( See Checking the transducer).
STAT
IM
5000/5000S/5000 G4 Service Guide
