Ahlborn ALMEMO 1036-2 User manual

____________________________
Operating instructions
X6 ALMEMO® 1036-2
High-precision humidity measuring
instrument or Pt100 psychrometer
V2.0
08.04.2015
www.ahlborn.com

1. Operating controls
1. OPERATING CONTROLS
(1) Measuring sockets M0 to M1
M0..M1 ALMEMO sensors
M10..M31 Additional channels
for humidity variables
M02 internal Atmospheric pressure
M12..M32 Additional channels
(2) Sleep-LED
(3) Output socket A2
SD memory connector (ZA1904-SD)
(4) Output socket A1
V24 interface (ZA 1909-DK5)
Optic fiber (ZA 1909-DKL)
USB (ZA 1919-DKU)
Ethernet (ZA 1945-DK)
(5) Power supply, DC 12V
Mains adapter (ZA1312-NA7, 12V, 1A)
Cable, electr. isol. (ZA 2 90-UK, 10-30V)
(6) LCD, graphics display
7 rows or unction
1 row or so tkeys F1,◄,▲,►, F2
Shown in brackets: <MEM> , <FCT>
(7) Operating keys
ON To switch device ON,
To switch device OFF
press and hold down
F1 , F2 Function keys (softkeys)
▲, ▼ ... M: measuring channel
▲, ▼, ► F: menu
PROG , ▼... F: function
◄ ... To return to menu
PROG To program
▲, ▼, ►... To enter data
< M◄◄ > directly to the
measuring menu
< P◄◄ > directly to the
programming menu
Rear of device:
(8) Battery compartment
3 AA alkaline-manganese batteries
2 ALMEMO 1036

Table of Contents
2. TABLE OF CONTENTS
1. OPERATING CONTROLS...........................................................................2
3. GENERAL....................................................................................................5
3.1 Warranty..............................................................................................5
3.2 Standard delivery...............................................................................5
3.3 Waste disposal...................................................................................6
4. SAFETY INSTRUCTIONS...........................................................................6
4.1 Handling batteries / rechargeable batteries correctly.....................7
4.2 Special notes on use..........................................................................8
5. INTRODUCTION..........................................................................................8
5.1 Measuring humidity, basic principles...............................................8
5.2 Psychrometer.....................................................................................8
5.3 Measuring instrument........................................................................9
5.4 Sensor programming.......................................................................10
5.5 Measuring operation........................................................................10
6. PUTTING INTO SERVICE..........................................................................12
7. POWER SUPPLY.......................................................................................13
7.1 Battery operation and supply voltage monitoring.........................13
7.2 Mains operation................................................................................13
7.3 External DC voltage supply.............................................................13
7.4 Switching ON / OFF, reinitialization................................................14
7.5 Data bu ering...................................................................................14
8. CONNECTING SENSORS / TRANSDUCERS...........................................14
8.1 Sensors / transducers......................................................................14
8.2 Stationary high-precision psychrometer FPA 836-3P3..................15
8.3 Measuring sockets, measuring channels.......................................16
8.4 Potential separation.........................................................................17
9. DISPLAY AND KEYPAD............................................................................18
9.1 Display and menu selection............................................................18
9.2 Measured value display and status symbols.................................18
9.3 Function keys...................................................................................19
9.4 Selecting a unction.........................................................................19
9.5 Entering data....................................................................................20
10. MENU SELECTION SCREEN..................................................................21
11. SENSOR DISPLAY..................................................................................21
11.1 Selecting a measuring channel.....................................................21
11.2 Atmospheric pressure compensation...........................................22
11.3 Di erential measurement...............................................................22
12. MEASURING CHANNEL LIST MENU.....................................................22
13. FUNCTIONS MENU.................................................................................23
13.1 Setting a measured value to zero..................................................23
ALMEMO 1036 3

2. Table of Contents
13.2 Maximum / minimum memory.......................................................24
13.3 Individual value memory................................................................24
14. SENSOR PROGRAMMING.....................................................................25
14.1 Measuring channel designation....................................................25
14.2 Locking the sensor programming.................................................25
14.3 Selecting a measuring range.........................................................25
14.4 Functions o the Pt100 psychrometer FPA8363P3......................26
14.4.1 Measuring ranges...................................................................26
14.4.2 Multi-point adjustment............................................................26
14.4.3 Smoothing by means of a sliding average..............................27
14.5 Functions o D6 sensors................................................................27
14.5.1 Measuring ranges of the NTC psychrometer FNAD46-3........27
14.5.2 Meas. ranges of the capacitive humidity sensor FHAD36-RS....
27
14.5.3 Correction values...................................................................28
14.5.4 Scaling, decimal point setting.................................................28
15. DATA LOGGER.......................................................................................29
15.1 Memory connector with memory card..........................................29
15.2 Date and time-o -day......................................................................30
15.3 Once-only output / saving o all meas. channels.........................30
15.4 Cyclic output / saving o all measuring channels........................30
15.5 Memory capacity, memory output, clearing the memory............31
15.6 Memory time available...................................................................31
15.7 Sleep mode.....................................................................................31
15.8 Starting and stopping measuring operations..............................32
16. DEVICE CONFIGURATION.....................................................................33
16.1 Language........................................................................................33
16.2 Illumination and contrast...............................................................33
16.3 Inter ace, baud rate, data ormat...................................................33
16.4 Device Address and Networking...................................................34
16.5 Data communications....................................................................34
16.6 Atmospheric pressure....................................................................35
17. OPTION FE - FUNCTION EXTENSION...................................................35
18. TROUBLE-SHOOTING............................................................................37
19. DECLARATION OF CONFORMITY.........................................................38
20. ANNEX..................................................................................................... 38
20.1 Technical data.................................................................................38
20.2 Product overview...........................................................................40
Order no...................................................................................................40
20.3 Index................................................................................................41
20.4 Your contact partner......................................................................44
4 ALMEMO 1036

General
3. GENERAL
We should like to congratulate you on your purchase of this new and innova-
tive psychrometer; this outstanding instrument provides high-precision mea-
surements for Pt100 sensors at a resolution of 0.001 K; it is thus also ideally
suitable for highly accurate humidity measurement..
3.1 Warranty
JEach and every device, before leaving our factory, undergoes numerous qual-
ity tests. We provide a guarantee, lasting two years from delivery date, that
your device will function trouble-free. Before returning your device to us, please
observe the advisory notes in Chapter 17, ´Trouble shooting´. In the unlikely
event that a device does prove defective and you need to return it, please
wherever possible use the original packaging materials for dispatch and en-
close a clear and informative description of the fault and of the conditions in
which it occurs.
This guarantee will not apply in the following circumstances :
Any form of unauthorized tampering or alteration inside the device
Use of the device in environments or conditions for which it is not suited
Use of the device with an unsuitable power supply and / or in conjunction
with unsuitable peripheral equipment
Use of the device for any purpose other than that for which it is intended
Damage caused by electrostatic discharge or lightning
Failure to properly observe these operating instructions
The manufacturer reserves the right to change the product's characteristics in
the light of technical progress or to benefit from the introduction of new compo-
nents.
3.2 Standard delivery
When you unpack the device please check carefully for any signs of transport
damage and ensure that delivery is complete.
Measuring instrument ALMEMO 1036-2 with 3 AA alkaline batteries,
Mains adapter ZA1312NA7,
Pt100 psychrometer FPA836-3P3
with mains adapter, water bottle, set of wicks,
USB data cable ZA1919DKU
Instrument case,
DKD/DakkS calibration certificate,
Software ALMEMO View SW5500AV
CD with ALMEMO Control software and various useful accessories
These operating instructions, ALMEMO Manual
In the event of transport damage please retain the packaging material and in-
form your supplier immediately.
ALMEMO 1036 5

3. General
3.3 Waste disposal
The pictogram showing a waste bin crossed through
means that the product is subject to European Union regu-
lations on segregated waste disposal. This applies both to
the product itself and to any accessories marked with the
same symbol. Disposal of any such item as unsorted do-
mestic waste is strictly forbidden
•Please dispose of all packaging materials according to the applicable national
waste management regulations.
•Please dispose of cardboard boxes, protective plastic packaging materials,
and all preservative substances separately and in the proper manner.
•The disposal of the device itself (also of device parts, accessories, and con-
sumables) is subject to the applicable national and local waste management
regulations and to the environmental protection legislation in force in the
country of use.
•Please dispose of all waste in the proper manner;
this applies in particular to all parts and substances that constitute a hazard
for the environment. This includes inter alia plastics, batteries, and recharge-
able battery packs .
•When disposing of goods, please wherever possible use the original packag-
ing materials.
4. SAFETY INSTRUCTIONS
DANGER Danger to li e and limb, risk o damage to equipment
Read the instructions care ully be ore starting to operate
the device. Please ensure that you comply with all general
sa ety advice and the special sa ety instructions included
in other chapters.
Such risks may occur in the following circumstances :
•Failure to heed the operating instructions and all the safety
notes these contain
•Any form of unauthorized tampering or alteration inside the
device
•Use of the device in environments or conditions for which it
is not suited
•Use of the device with an unsuitable power supply and / or
in conjunction with unsuitable peripheral equipment
•Use of the device for any purpose other than that for which
it is intended
•Damage caused by electrostatic discharge or lightning.
6 ALMEMO 1036

Safety instructions
DANGER Risk o atal injury caused by dangerously high voltage
Such risks may occur in the following circumstances :
•Use of the device with an unsuitable power supply and / or
in conjunction with unsuitable peripheral equipment
•Damage caused by electrostatic discharge or lightning
•Do not run sensor lines in the vicinity of high-voltage power
cables.
•Before you touch any sensor lines, ensure that all static
electricity has been discharged.
DANGER Warning - explosive atmospheres or substances
In the vicinity of various fuels or chemicals there is a risk of ex-
plosion.
Do not use the device in the close vicinity of blasting work or fill-
ing stations!
4.1 Handling batteries / rechargeable batteries correctly
When inserting batteries / rechargeable batteries ensure that
these are correctly polarized.
If the device will probably not be needed for a relatively long pe-
riod of time or if the batteries are empty, remove the batteries;
this will prevent battery acid leaking onto the device and damag-
ing it.
Rechargeable batteries should be recharged as and when nec-
essary.
You should never attempt to recharge an ordinary (non-
rechargeable) battery; it may explode !
Batteries / rechargeable batteries must never be short-circuited
or thrown onto the fire.
Batteries / rechargeable batteries are special waste and must
not be discarded together with normal domestic waste.
ALMEMO 1036 7

4. Safety instructions
4.2 Special notes on use
•If the device is brought into the work-room from a cold environment there is a risk that
condensation might form on the electronics. In measuring operations involving ther-
mocouples pronounced changes in temperature may cause substantial measuring er-
rors. You are advised therefore to wait until the device has adjusted to the ambient
temperature before starting to use it.
•Before using the mains adapter make sure that the mains voltage is suitable.
•Be sure to observe the maximum load capacity of the sensor power supply.
•Sensors with their own integrated power supply are not electrically isolated from one an-
other
5. INTRODUCTION
5.1 Measuring humidity, basic principles
Humidity is always present in the atmosphere in the form of water vapor. The
percentage of water vapor per volume of air varies. Saturation vapor pressure
at any given air temperature is the maximum partial pressure of water vapor
(its gas phase) over an even surface of water (its liquid phase). This is temper-
ature-dependent; at each temperature there is a maximum quantity of water
vapor that can be contained in a defined quantity of air. Atmospheric humidity
can be specified either as absolute humidity or as relative humidity. In
these operating instructions humidity variables will be given first using the new
symbols defined in VDI/VDE 3514 and then in brackets using the old abbrevia-
tions seen in tables issued by the Deutscher Wetterdienst (German Meteoro-
logical Service).
Absolute humidity dv (AH) is also referred to as water vapor content. This is
the weight of water vapor contained in one m3 of a mixture of water vapor and
air. Since 1 m3 will, depending on pressure and temperature, contain a differ-
ent air mass, it is usually easier to refer to absolute humidity per 1 kg of dry
air. This variable is known as the mixture ratio r (MH).
Relative humidity Uw (RH) is the ratio of the water vapor’s partial pressure
e´ (VP) to the saturation vapor pressure ew´ (SVP) in a mixture of water vapor
and air at air temperature t (TT). The temperature at which saturation occurs
(VP=SVP, RH=100%) is known as the dewpoint temperature td (DT). As
soon as the air falls below this dewpoint temperature the water vapor (gas
phase) condenses into droplets of water (liquid phase). Enthalpy h (En) is the
thermal content in the mixture of water vapor and air.
5.2 Psychrometer
Measuring principle
A psychrometer is a precision measurement instrument incorporating two
highly accurate temperature sensors; it is used to determine all the usual hu-
midity variables. One of these sensors is covered in a cotton sheath; this must
be kept permanently moist with water from a reservoir and cooled by means of
8 ALMEMO 1036

Psychrometer
a current of air. When the power supply is connected and the integrated fan
starts operating, the moistened temperature sensor will, depending on air tem-
perature and humidity, cool down by a measurable amount. Based on this psy-
chrometric temperature difference the water vapor’s partial pressure e´ and
thus all the variables associated with atmospheric humidity can be calculated.
5.3 Measuring instrument
The reference measuring instrument ALMEMO 1036-2 belongs to the new X6
series of high precision measuring instruments featuring very high resolution
and linearity. The ALMEMO 1036-2 provides 2 galvanically isolated measuring
inputs for Pt100 sensors with a measuring range from -200 to 400/560°C and a
resolution of 0.001K. Since the temperature values can be calculated precisely
thanks to appropriate formulas, there will be no linearization errors concerning
the resolution. The measurement accuracy of up to 760,000 digits is signifi-
cantly higher than the usual 16bit numbers (65000) for other ALMEMO V6 de-
vices. Due to this high measurement accuracy, the standard functions limit val-
ues, measured value correction, scaling or analog outputs cannot be sup-
ported. Alternatively, the possibility for multi-point adjustment of 24bit basic
value interpolation or of the modification of coefficients is offered. Thanks to
that, the ALMEMO 1036-2 is perfectly suited as a precision reference instru-
ment for temperatures as well as – in combination with the psychrometer – for
all humidity variables.
The Pt100 psychrometer can be used to measure very accurately both dry
temperature and humid temperature and thus calculate all the usual humidity
variables on the basis of formulae as per Dr. Sonntag and the enhancement
factor as per W. Bögel (correction factor fw(t,p) for real mixed gas systems).
These calculations must take account of atmospheric pressure; for this pur-
pose the device incorporates as standard an atmospheric pressure sensor.
The measuring range and accuracy of this device are thus much greater than
with previous systems. The atmospheric pressure measured can also be used
as an additional climate variable.
Device 1036-2 can also have two digital D6 humidity sensors connected,
namely NTC psychrometer FNAD36-3, and capacitive humidity sensor
FHAD46-RS (for up to maximum 200 °C). Both use exactly the same calcula-
tion principles and internal atmospheric pressure compensation as the Pt100
psychrometer.
To facilitate operation the device incorporates an illuminated LCD graphics dis-
play and a keypad with softkeys and cursor block. The device incorporates
three output sockets for connecting interface cables, a memory connector, or a
mains unit.
ALMEMO 1036 9

5. Introduction
5.4 Sensor programming
Measuring ranges
For Pt100 sensors, two high resolution measuring ranges exist: -200.000 to
560.000°C and (as an option) -200.00 to 850.00°C. The calculation of the hu-
midity variables relative humidity and dew point is rounded to two decimal
places. Additionally, the following humidity variables are available: mixture ratio
MH, r [g/kg], absolute humidity AH, dv [g/m3], vapor pressure VP, e [mbar] and
enthalpy En, h [kJ/kg]. Differential measurements and monitoring of the supply
voltage are possible via further function channels.
Or you can connect and program our latest D6 digital humidity sensors. This
device - unlike standard ALMEMO V6 devices - can even display individual
range abbreviations; these would otherwise have to be transferred via interface
to the PC.
Measured channel designation
Each sensor is identified by means of a 10-character alphanumeric name.
These names are entered via the keypad or the interface and appear in the
display, in the printout, and on the computer screen.
Correction o measured values
The standard functions regarding measured value correction and scaling can-
not be used due to the considerably expanded measuring range. It is however
possible to set the measured value of every measuring channel to zero. More-
over, the sensors are adjustable in several points: either via multi-point lin-
earization i.e. the error curve can be stored in the measurement plug or via
modification of the Pt100 coefficients.
For digital D6 sensors the standard correction functions, zero-point and gain,
are also provided.
All programmed sensor parameters are saved in the connector and are auto-
matically restored as and when a sensor is plugged in.
5.5 Measuring operation
The user can move forwards or backwards from one measuring channel to the
next using the keypad. Data is output on the display at a rate of 1.25 measur-
ing operations per second (mops).
Atmospheric pressure compensation
Humidity variables are heavily dependent on atmospheric pressure. To avoid
errors of this nature the device incorporates its own atmospheric pressure sen-
sor for compensating its measured values. All D6 sensors incorporate their
own atmospheric pressure sensor.
Measured value smoothing
For both measuring channels measured values of an unstable, fluctuating na-
ture can be smoothed by taking a sliding average over a number of values pro-
grammable from 2 to 99. With D6 sensors a separate time constant can be
programmed. (see sensor instructions)
Maximum and minimum values
10 ALMEMO 1036

Measuring operation
For each measuring operation the maximum value and minimum value are ac-
quired and saved to memory. These values can then be displayed, printed out,
or deleted from memory.
Measured value memory
Up to 100 measured values can be saved manually. This data can then be
shown on the display or output via the interface.
Operation
All measured values and function values can be displayed in different menus
on the dot-matrix LCD screen. Seven keys (four of them softkeys) are avail-
able for operating the device. In this way the device and sensors can be pro-
grammed.
Output
All data logs, menu functions, saved measured values, and stored program pa-
rameters can be output to any peripheral equipment. Using the appropriate in-
terface cable any of interfaces RS232, RS422, USB, or Ethernet can be used.
Measured data can be output in list, column, or table format. Files in table for-
mat can be processed directly using any standard spreadsheet software. The
print header can be programmed to refer specifically to your company or to a
specific application.
Data logger
The device can, by fitting an external memory connector with a micro-SD mem-
ory card, be upgraded to a high-capacity data logger. Using this external mem-
ory connector (available as an accessory) files can be read out very quickly via
any standard card reader. As soon as this is connected two additional menus
with all the necessary parameters e.g. date, time-of-day, cycle, start time, end
time, memory capacity, file name etc. are available.
ALMEMO 1036 11

6. Putting into service
6. PUTTING INTO SERVICE
Sensor connection Connect sensors to sockets M0 and M1 (1) see 8.
Power supply Via battery or mains adapter connected at socket DC (5)
see 7.1, 7.2
To switch ON Press once and release key ON / PROG (7) see 7.4
Automatic display of the measuring menu see 11,
To call up the menu selection screen press <MENU>
To activate / deactivate display illumination press < ON>
To access the Sensor display s. 9.1
press <F> : ▲ / ▼ ...
call up the menu press: ► or PROG
select a measuring channel(s.11.1) <M> : ▲ / ▼ ...
The measured values from
the sensor are displayed.
To call up the unctions menu press < FCT >
or select it in the menu selection screen
Max-Min, Memory : ▲ / ▼ ... , ►
select a measuring channel(s.11.1) <M> : ▲ / ▼ ...
set a measured value to zero PROG , < ERO>
save a measured value (s. 13.3) < MEM>
To display saved values < LISTM>
To output memory via an interface to a printer or computer
Connect peripheral equipment via data cable to socket A1 (2). s. 16.3
To output memory see 13.3 < PRINT> or command ´P-04´ from computer
12 ALMEMO 1036

Power supply
7. POWER SUPPLY
Power can be supplied to the measuring instrument in any of the following ways :
3 AA alkaline batteries (included in delivery)
Mains adapter, 12 V, 1 A, with ALMEMO plug ZA 1312-NA7
Power supply cable, electrically isolated (10 to 30 VDC, 0.25 A) ZA 2690-UK
Our product spectrum covers all the appropriate accessories.
7.1 Battery operation and supply voltage monitoring
he device is normally powered by 3 AA alkaline batteries. At a current con-
sumption of on average 25 mA, these last for an operating time of approx. 100
hours. If the display illumination is left switched ON, this operating time will be
reduced to approx. 50 hours. The operating voltage can be checked in the
´Info´ menu; this gives you a basis for estimating the remaining operating time.
(see XREF)
As soon as the remaining battery capacity drops to approx. 10%, the battery
symbol ´´µµµµµµµµµ¶ in the status bar of the display will start to flash. If the batteries are
completely discharged, i.e. down to approx. 3V, the device will switch OFF au-
tomatically but measured data already acquired will be saved. (see 7.5)
To replace used batteries first unscrew the battery compartment cover (7) on
the rear of the device. When inserting batteries ensure that their polarity is
correct.
7.2 Mains operation
To power this device from an external source preferably use mains adapter ZA
1312-NA7 (12 V / 1 A); connect this to the DC socket (3).
Please ensure that the mains voltage is correct.
7.3 External DC voltage supply
The DC socket (3) can also be used to connect another DC voltage, 6 to 13 V
(minimum 200 mA). ALMEMO connector ZA1012-FS should be used. If,
however, the power supply has to be electrically isolated from the sensors or if
a larger input voltage range (10 to 30 V) is required, then electrically isolated
supply cable ZA 2690-UK must be used. It will then be possible to use the
measuring instrument in a 12-volt or 24-volt on-board supply system.
ALMEMO 1036 13

7. Power supply
7.4 Switching ON / OFF, reinitialization
To switch the device ON press and release ON PROGr (6) located in the middle
of the cursor block. The first thing to appear in the display is always the mea-
suring menu.
To switch OFF press and hold down the same key(s) ON PROGr. When the de-
vice switches OFF all saved values and settings are retained intact. (see 7.5)
If interference (e.g. electrostatic) or a malfunction (e.g. battery failure) causes
the device to behave abnormally, it can be reinitialized. To activate RESET
press and hold down key F1 r when switching on. To completely reinitialize all
device programming (including device designation) to the factory defaults keep
key F2 r pressed when switching on. In so doing certain parameters will be
lost or be returned to their defaults : Language = German, illumination = OFF.
7.5 Data bu ering
The sensor's programming is stored in the EEPROM on the sensor connector;
the device's calibration values and programmed parameters are stored in the
EEPROM on the instrument itself; in the event of failure both will be retained in-
tact. When the device is simply switched off, the date and time-of-day settings
and the individual value memory on the data logger are retained intact; how-
ever, if the device is reset or the batteries are replaced, this will all be lost.
8. CONNECTING SENSORS / TRANSDUCERS
The following special devices can be connected at input sockets M0 and M1
(1) on the measuring instrument :
stationary high-precision psychrometer FPA836-3P3, digital D6 NTC psy-
chrometer FNAD46-3, or D6 humidity sensor FHAD36-RS. Or of course a
high-precision Pt100 sensor FPA923-L0250 with range P314 (0.001K) can be
used.
8.1 Sensors / transducers
All the afore-mentioned sensors with an ALMEMO plug have their measuring
range and units already programmed and can thus be connected to the mea-
suring sockets without any further adjustment. A mechanical coding system
ensures that sensors and output modules can only be connected to the correct
sockets. All ALMEMO plugs incorporate two snap-lock levers; these snap into
position as soon as the plug is inserted into the socket, thus preventing unin-
tended disconnection if the cable is pulled accidentally. To withdraw the plug
both these levers must first be pressed in at the sides.
Splash-proof variants of devices in the ALMEMO 1036 series are also avail-
able as options. For this purpose new sensors are now available with spray-
coated ALMEMO plugs incorporating a double sealing lip specially designed to
protect the socket unit against penetration by splashing water. For any unused
sockets protective stoppers are available.
14 ALMEMO 1036

Stationary high-precision psychrometer FPA 836-3P3
8.2 Stationary high-precision psychrometer FPA 836-3P3
Filling the water reservoir
1. Undo the refill screw
2. Top up the reservoir with distilled water using the squeeze bottle supplied
3. Tighten the refill screw again and perform measuring operation
The water in the reservoir may in certain circumstances become contami-
nated. The reservoir must be cleaned therefore about every 6 weeks. In the
event of long periods of inactivity or for transport purposes the reservoir should
be emptied completely.
Changing the wick
If the cotton wick becomes dirty or encrusted it will no longer absorb moisture
properly; as a result measured values may be falsified. It should therefore be
replaced at regular intervals (depending on how clean the air and water are).
1. Emptying the reservoir (see above)
2. Unscrew the water reservoir lid
3. Unscrew the motor / sensor retaining plate and withdraw the old wick from
the humid temperature (HT) sensor
4. From the side of the reservoir insert the new wick into the psychrometer
tube and pull over the HT sensor
5. Screw the motor / sensor retaining plate back again
6. From the side of the reservoir adjust the wick, screw the reservoir lid back
in position, and refill the reservoir.
Using the psychrometer
To obtain reliable results it is very important that the psychrometer be operated
properly. Please ensure therefore that you always comply with all the following
advisory notes :
1. After the fan starts up it will take approx. 20 to 30 seconds before the humid
temperature sensor is sufficiently cooled. Only after this period will humidity
values be stable.
ALMEMO 1036 15

8. Connecting sensors / transducers
2. Ensure that the humidity sensor is always sufficiently moistened. If you are
unsure whether there is sufficient moisture carry out a visual inspection of
both the cotton sheath and the wick itself. To moisten the wick use distilled
water only. Ordinary water may leave calcified deposits on the wick.
3. If the wick no longer absorbs water properly (through dirt or dryness), re-
place its cotton sheath.
4. Air velocity at the air intake must be minimum 2 m/s. Ensure therefore that
the air intake is always free and unobstructed.
5. Avoid inadvertently warming the probe head from external heat sources or
your own body heat.
8.3 Measuring sockets, measuring channels
Measuring instrument ALMEMO 1036 has 2 measuring sockets M0 and M1
(1) and to each of these up to 4 measuring channels can be allocated.
Device-internal channels
This device also provides 4 device-internal additional channels. These can be
used, as and when necessary, to program the battery voltage, the device-inter-
nal atmospheric pressure, or a function channel Differential . see 14.3, 11.3.
Channel assignment on the 1036-2:
The 3 possible sensors are programmed on leaving
our factory with the following ranges (s. 14.3):
Pt100-Psychrometer
FPA836-3P3
Psychrometer
FNAD46-3
Humidty sensor
FHAD36-Rx
4. D r D AP D AP
3. P2td D Uw D td
2. P2Uw D tw D Uw
1. P314 HT P314 TT AP D t D t
M0 M1 M2 M0/M1 M0/M1
16 ALMEMO 1036
1. chan.
2. chan.
3. chan.
4. chan.
sensor channels
1036-2
00
10
20
30
01
11
21
31
02
12
22
32
M0 M1 M2
internal
channels

Potential separation
8.4 Potential separation
When organizing a properly functioning measuring setup it is very important to
ensure that no equalizing current flow between sensors, power supply, and pe-
ripherals. All points must therefore lie at the same potential and / or any un-
equal potentials that do exist must be electrically isolated.
The analog inputs are electrically isolated by means of photovoltaic relays; the
maximum potential difference permitted between them is 50 VDC or 60 VAC.
The power supply is isolated by the transformer in the mains adapter or by a
DC/DC converter in connecting cable ZA2690-UK.
ALMEMO 1036 17
M1
M0
Data cable
AC
DC
DC
DC
ADC uC
U-
U+
Sensor
Power supply
10..30V=
230V≈

9. Display and keypad
9. DISPLAY AND KEYPAD
9.1 Display and menu selection
Measuring instrument ALMEMO 1036 incorporates a display (5) comprising a
dot-matrix LCD with 128x64 pixels or 8 rows each 8 pixels high.
The menu selection screen offers the following items : (see 10.)
2 measuring menus for measured data acquisition (see 11)
1 function menu for saving values Also accessible from the measuring menu by
pressing key < FCT > (see 13)
2 programming menus for programming the
sensors and the device parameters (see 14, 16)
´Info´ menu for information regarding the device
and the sensors (see 10).
The data logger menu appears when you con-
nect of a memory connector (see 16)
To call up menu selection (depending on the menu) press ◄ ... or <MENU>
To switch display lighting (see 16.2) ON
To switch the device OFF press and hold down key ON
To select menus press ▼ or ▲ ...
To call up the selected menu press ► or PROG
To view the most important device information < INFO>
9.2 Measured value display and status symbols
The ´Sensor display´ menu will show the se-
lected measuring channels, the measured value,
and in some cases the functions of importance
for this measured value, plus any further mea-
suring channels assigned to the connector in
question. First comes the measuring channel,
then measured value, then units.
The measured value is described by a number of status symbols Symbol
No sensor, measuring channel deactivated ´- - - - -´
Measuring range overshot: Maximum value display O flashes
Measuring range undershot: Minimum value display U flashes
Sensor breakage / sensor voltage low : Display ´-.-.-´ B / L flashes
In the measuring menus the status bar displays the following states :
Relative measuring with respect to a reference value REL
Measured value corrected by multi-point adjustment º
Smoothing set D 5
Display illumination activated or on pause * or *
Battery status: full / half full / almost empty ´´´´´´´´´¶ , ´´´´´µµµµµ¶ , ´µµµµµµµµµ¶
18 ALMEMO 1036
AMR ALMEMO 1 36-2
M*Sensor display ©
M Meas. channel list
M Max-Min, individual mem.
P Sensor programming
P Device Configuration
INFO Mªª F © *OFF

Measured value display and status symbols
Battery voltage <3.8 V, remaining capacity <10% ´µµµµµµµµµ¶ flashes
In the data logger menu the top status bar also displays the following symbols for
checking the measuring sequence :
Measurement stopped or started ll or ©
Measuring channel scan started and data being saved REC
Measuring channel scan started with data output via interface COM
Start time or end time of measuring operation programmed l© or ©l
9.3 Function keys
The way in which the function keys (6) F1 , F2
and the cursor keys ◄ , ► operate may vary
from menu to menu. Their function is indicated
as an abbreviation in the bottom line of the dis-
play (softkeys). In the instructions and documen-
tation these softkey abbreviations are shown in
angle brackets. e.g. <MEM> ..
In the measuring menus the following function keys are available :
To select the measuring channel press cursor keys ▲ or ▼ ...
Help is provided in the form of the softkey symbol
which lights up in the middle. <M>
To call up the functions menu for the individual value memory < FCT > or F2
To call up the data logger menu (with memory connector) < LOG > or F2
To return to menu selection < MENU > or ◄
To return to the measuring menu < M◄◄ >
9.4 Selecting a unction
Each menu comprises a number of functions;
these may have to be activated or pro-
grammed during operation.
To select a unctions press PROG
The first modifiable parameter is highlighted in inverse font 154.512
ALMEMO 1036 19
REL º D 5 ´´´´´´µµµµ¶
1: 54.512 °C
P314 TT, t
Min: 135.374 Max: 161.349
Memory: P12: 125.454°C
MEM Mªª F LISTM *ON

9. Display and keypad
Help is provided by the softkey symbol <F> (for function selection) <F>
To move forward to the next function press ▲ or ▼ ...
Depending on function the keys F1 , F2 ,
and ◄ , ► are assigned the desired meaning,
e.g.. set measured value to zero. < ERO>
To delete the maximum / minimum value <CLR>
To clear the memory <CMEM>
To cancel the function <ESC>
9.5 Entering data
When a programmable parameter is selected its current value can be cleared
or reprogrammed directly. (see 9.4)
To delete a programmed value press < CLR >
To program a value press PROG
You should now be in programming mode. <P> should appear in the
middle of the softkey bar.
The cursor appears below the first input position flashing Smoothing
5
To increment the selected digit press ▲ ...
To decrement the selected digit press ▼ ...
To change the arithmetic sign of a numeric value press < +/- >
To move forward to the next position press ►
The cursor now appears below the second position flashing. Smoothing
5
To move back to the previous position press ◄
Each position is programmed just like the first. ▲ / ▼ ..., ►
To save and exit press PROG
To cancel without saving press <ESC>
When entering a series of alphanumeric characters select the appropriate
group.
For upper-case characters press <ABC>
For lower-case characters press < abc >
For numbers only press < 123 >
For arithmetic sign press < + - >
When entering certain parameters (e.g. units, baud rate, etc.) this procedure
can be used to select and program not just characters but whole designations.
20 ALMEMO 1036