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2. INTRODUCTION
2.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the unit
and any accessories for damage. If there is any damage then consult
your distributor immediately.
2.2 Description
The Martindale PM85 has the following functions and features:
Differential pressure measurement to 1.45psi (100mbar)
8 selectable units of measurement
Air speed measurement using a pitot tube.
Hold, Max, Min, Max-Min and Average functions
Auto power off
Low battery indication
LCD display with backlight
Pocket-sized, compact body
2.3 Accessories
The PM85 comes with the following accessories:
Protective cover for safe storage
2 x 1.5V AAA batteries
Detachable carry strap
Instructions
Accessories not included:
Pitot tube
2.4 Battery Installation
Refer to Section 4.1 (Battery Replacement) for the battery installation
instructions for the PM85.
fpm m/s
Unit of air speed being displayed
Density (kg/m
3
)
Unit of density being displayed
(lb/ft
3
)
Indicates press of
ENTER
Indicates press of
3.4 Power On/Off
To power on in Measurement mode, press
second.
To power on in Set mode, press
To power off the unit, press
for 2 seconds.
3.5 Auto Power Off (APO)
If the unit is inactive for a period of 10 minutes it will automatically
power off.
To disable this function refer to section 3.7.
3.6 Backlight
Press
for less than 1 second to turn on the backlight.
It will automatically turn off after 15 seconds if there is no further
operation of the unit.
3.7 Set Mode
This mode sets the following in the order shown:
Unit of measurement;
Density of the medium (only if fpm or m/s is selected);
Auto power off (APO).
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PM85 instructions rev1.indd 5
button required
MODE
button required
for less than 1
for 2 seconds.
3. OPERATION
3.1 Low Battery Indication
If the
s displayed, the battery needs replacing as measurement
i
accuracy can no longer be guaranteed (see section 4.1 Battery
Replacement).
3.2 Description of Press Buttons
Selects Set mode settings
Turns on/off the PM85, turns on backlight
Selects Set mode and Hold mode functions
MODE
3.3 Description of LCD symbols
APO
HOLD
MAX
MIN
MAX-MIN
AVG
mmH
O mmHg
2
psi inH
O inHg
2
hPa, mbar Pa
3
4
The Set mode is selected by pressing
powered off.
If the unit is switched off while in the Set mode, any changed settings
will not be saved, and the unit will revert to the previous settings.
Unit of Measurement
The LCD will fl ash the current set unit of measurement after entering
the Set mode.
Press
to select mmH2O, mmHg, psi, inH2O, inHg, hPa, mbar,
Pa or if fi tted with the optional pitot tube fpm or m/s may be selected.
MODE
Press
to advance to the next function.
Density (only if fpm or m/s is selected)
The LCD will display Density and the fi rst numerical digit after the
decimal point will fl ash.
Press
to increment the digit from 0 to 9 as required. After 9 the
digit will step back to 0.
MODE
Press
to advance to the next digit that will now fl ash.
Press
to increment from 0 to 9 as required.
MODE
Press
to advance to the last digit that will now fl ash.
Press
to increment from 0 to 9 as required.
MODE
Press
to advance to the next function.
APO
The LCD will display APO.
Press
to select ON or OFF as required.
MODE
Press
to save settings and return to the Measurement mode.
3.8 Zero Function
Pressure differences up to 10hPA can be zeroed.
5
6
Auto power off is active
Indicates low batteries
Hold mode is active
Maximum recorded reading is displayed
Minimum recorded reading is displayed
The difference between maximum and
minimum recorded readings is displayed
The average of recorded readings is displayed
Unit of pressure measurement being displayed
for 2 seconds with the unit
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