Advertisement
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 DH85 has the following measurement functions:
Moisture (measures conductivity in the material under test)
Relative humidity from 0% to 100% R.H.
Dry bulb, dew point and wet bulb temperature from -20°C to 60°C
(-4°F to 140°F)
Further functions and features are:
Max/Min, Average and Hold functions
Auto power off
Low battery indication
LCD display with backlight
Pocket-sized, compact body
2.3 Accessories
The DH85 comes with the following accessories:
Protective cover for safe storage
2 x 1.5V AAA batteries
Detachable carry strap
Instructions
2.4 Battery Installation
Refer to Section 4.1 (Battery Replacement) for the battery installation
instructions for the DH85.
The difference between maximum and minimum
MAX-MIN
recorded readings is displayed
AVG
The average of recorded readings is displayed
°C °F %
Units of measurement being displayed
Indicates press of
Indicates low batteries
APO
Auto power off is active
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:
Temperature scale;
Auto power off (APO).
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
MODE
3.3 Description of LCD symbols
Test:
Test: OK
wood
mortar
WB
td
HOLD
MAX
MIN
3
4
19/06/2014 14:06:14
DH85 instructions rev1.indd 5
The Set mode is selected by pressing
unit 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.
Temperature Scale
The LCD will display Set Unit and fl ash the current temperature
scale after entering the Set mode.
Press
to select °C or °F 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 advance to the Measurement mode.
3.8 Test Function
While in Measurement mode, scroll through the measurement
ranges with successive presses of the
until the display fl ashes Test :.
Press the DH85 test probes onto the test resistor contacts at the top
of the protective cover.
If Test : OK is displayed the unit is ready for use.
If Test : continues to fl ash clean the test probes and resistor
contacts and repeat the test.
Press
to return to the Measurement mode.
5
6
Selects Set mode settings
Selects moisture range
Selects between R.H., dew point or wet bulb
measurement
Turns on/off the DH85, turns on backlight
Selects Set mode and Hold mode functions
Indicates test function is selected
Indicates test function passes
Indicates a wood range is selected
Indicates a mortar range is selected
Indicates wet bulb temperature is being displayed
Indicates dew point temperature is being displayed
Hold mode is active
Maximum recorded reading is displayed
Minimum recorded reading is displayed
for 2 seconds with the
button for < 1 second
19/06/2014 14:06
Advertisement
