Model:
PM-20
Sensor type:
Differential
Operating range:
130mbar
Connector Type:
Push fit connector
Units:
mbar
Operating Temperature:
-10°C to +50°C
Accuracy of Unit Only
:
+
20 to +50°C: 0.10% of RDG +0.10% of FS + 1 LSD
-10 to +20°C: 0.15% of RDG +0.15% of FS + 1 LSD
All ± 1 LSD
Digit ( 0.1˚C Low scale; 1˚C High scale )
Negative pressure: 0.3% r 0.3% full scale
Note: FS=Full Scale LSD= Least Significant Digit (Full range of the unit to be used for both low & high scale calculations)
Particular care should be taken not to over pressure the device as this may rupture the sensor membrane. This is not covered by the
manufacturers warranty.
Note: The differential/gauge instrument will only measure relative pressures i.e positive pressure applied to the positive port or
negative pressure applied to the negative port.
Instrument Application
The PM-20 is suitable for the measurement of differential pressure.
Instrument Operation
The instrument requires two AA or equivalent cells. These are not supplied with the unit.
When the batteries require changing the following symbol will be displayed:
Please ensure the screws holding the battery compartment are firmly tightened when inserting or replacing batteries to ensure the
IP67 rating is maintained.
Press ON key to turn unit ON. Press OFF key to turn unit OFF.
The unit will switch OFF automatically after 12 minutes, unless any key is activated.
To disable automatic switch off, hold Key when the unit is being switched on. This will disable the automatic switch-off function until
the unit is switched off.
Out of Range
If pressure exceeds the 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 atmospheric pressure, if indicated pressure is within 3% of full scale of the factory calibrated zero, press
0.0
key which will adjust the reading to zero.
Hold Function
To enable the Hold Function, press the “Hold”
button, press again to release the Hold Function.
Hose fitting
The input port(s) on the instrument are designed to accept a hose with 8mm Interior Diameter and 1mm wall. The hose is fitted by
pushing the hose onto the port, an additional clamp fitting may be used to ensure secure fitting.
Back Light
Press and hold
ON
key.
Time Test Facility Mode
The instrument’s Timer Mode indicates the measured pressure and time showing alternating on the display. The
time advances in
minutes and seconds to a maximum time of 99mins 59sec. The timer can be paused, continued or reset as required during the test
period. The timer mode needs to be selected to be viewed on the display.
