APM 135
PRESSURE
METER
OPERATING
INSTRUCTIONS
Crowcon Detection Instruments
172 Brook Drive,
Milton Park,
Abingdon,
Oxfordshire OX14 4SD
Tel: 01235 557780
email: [email protected]
web: www.antonbycrowcon.com
INSTRUMENT APPLICATION
This instrument is not suitable for use with corrosive
substances or cyclic hydrocarbons, e.g. motor oil,
transmission fluid and Freon. To use the APM 135
with these components, isolation must be provided in
the form of a buffer, such as a mineral oil or dry air.
INSTRUMENT OPERATION
BATTERIES
ON / OFF
Press and hold button for 0.5s to turn on.
Press and hold button for 2s to turn off.
Automatic switch-off after 5 minutes, unless any
button is activated or the pressure level is above 1
mbar.
BACKLIGHT
Press button to turn backlight on/off.
OUT OF RANGE
If the pressure exceeds the positive scale range Out
will appear on the display.
If the pressure exceeds the negative scale range -Out
will appear on the display.
ZEROING
In order to achieve maximum accuracy it is
recommended to zero the instrument in the orientation
it will be used before taking any measurements.
Ensure both ports are open to atmosphere, and then
press the
ZERO
button which will adjust the reading to
zero.
UNITS OF PRESSURE
Press UNIT button to select required units of pressure.
Chosen units will be saved when the instrument is
switched off.
1.
Positive pressure input spigot
2.
Negative pressure input spigot
3.
Backlit 4-digit LCD screen
4.
Pressure units selection button
5.
Min/Max mode selection button
6.
LCD backlight on/off button
7.
Power button
8.
Zero pressure button
Indicates full battery level.
Indicates low battery level and
batteries require replacing.
Insert 3 AA batteries.
