Dostmann Electronic P710, P700, P755, P770, P715 Operation Manuals

Precision Measuring Instruments
P700, P705, P710, P715, P750,
P755, P770, P755-LOG, P770-LOG

Operation Manual

SERIE

DOSTMANN electronic

P700

Retractable stand

Mounting device for
probe handle

Measuring port 1

Measuring port 2

(P705, P715, P755, P770,
P755-LOG, P770-LOG)

USB PC interface port

Big
LC-Display

Keyboard

2

Unit diagram

3

Operation Manual

Summary

1. Handling

1.1. General advices

1.2. Setting to work

1.3. Switch on/off

1.4. Menu

1.4.1. Measuring unit switching (UNIT)

1.4.2. Probe selection (Prob)

1.4.3. Difference temperature (Lin2)

1.4.4. Calibration (CAL)

1.4.4.1. Calibration
combination probe
(temperature/humidity)

1.4.5. Channel activation (Chnl)

1.4.6. Enter Area for volume flow (ArEA)

1.4.7. Memory setup (Lo6)

1.5. Recalling memory data
(HOLD/MAX/MIN/AVG)

1.6. Measuring rate (FAST-modus)

1.7. AUTO-OFF-function

1.8. Special-functions

1.8.1 Ohm/microvolt/volt/hertz display

1.8.2 Zero adjustment

1.8.3 Deactivation of the 2nd channel (toggle)

2. Power supply / Changing the battery

3. Error codes / troubleshooting

4. Technical data

5. Interface protocol

6. Connector layout

7. Data of probe-calibration

8. Guarantee

4

1.1 General advice

• For cleaning the instrument please do not use abra­sive cleaner but a dry or wet piece of cloth.

• Please store the measuring instrument in a dry and
clean place.

• Avoid any force like shocks or pressure to the instru­ment.

• Do not use force to connect the probe or interface
plugs in. The interface plug is different from the
probe plug.

• If no sensor is connected to the instrument while
switching on “open“ shows on the display (Please
refer to chapter error codes/troubleshooting).

• A retractable stand on the back of the instrument
allows it to be used as a bench top instrument.

1.2 Operation

Before switching on the instrument, connect the
probe/s to the instrument and insert the battery
(Please refer to chapter 6. Power supply / battery
changing). A number on the instrument's housing
marks each port.

1.3 Switching on and off

By operating the ON/OFF-key the instrument switched
on or off. After switching on the instrument indicates a
full segment test for 1,5 sec., afterwards the instru­ment shows the calibration-code and the adjusted
measurement category for channel 1. (Only 2-channel
instruments: After additionally 1,5 sec. the instrument
shows the calibration-code and the adjusted measure­ment category for channel 2.) Then it starts operating
in measurement mode indicating the actual measure­ment value (for example: temperature). All instruments
display the measurement value of channel 1 on the top
display line (big display line). Directly below you will
see the trending bargraph. The second channel of our
2-channel instruments you will see on the bottom line
(small display line).

Fig 1:

Example of channel information after switching on.:

channel 1

Line 1: [oFF P = calibration code of channel 1
according to standard linearization (DIN), probe selec­tion of channel 1 = Pt100.

channel 2

Line 2: [oFF P = calibration code of channel 2
according to standard linearization (DIN), probe selec­tion of channel 2 = Pt100.

1. Handling

1

2

5

Note: On all instruments you can select the measure­ment category (chapter 1.4.2. Prob) according to the
model version. Instruments that are delivered only with
one probe the correct measurement category is preset.
In other case please check chapter 1.4.2. (Prob) for the
correct set-up.

1.4 Menu

The adjustments of the instruments like the measure­ment value, calibration of Up and down keys probes,
deactivation of channels and so on are resulting from
the structure of the menu. You will reach into the main
menu by pushing [ENTER/MENUE]. With the up and
down keys [] you can choose your required menu
item. Push [ESC] to be back in the measuring mode.

Menu structure

1.4.1 Measuring unit switching °C and °F
respective %rH, td or g/m

3

/ [Unit]

Unit = Measuring unit

Measuring unit temperature

(°C=Celsius, °F=Fahrenheit)

Measuring unit humidity

(%rH=relative humidity, td=dew point, g/m

3

=absolute

humidity)

Important!

Unit

°C

°F

m/s

%rh

g/m

3

°C td

°F td

Pa

hPa

Prob Lin2 CAL Chnl ArEA Lo6

P

J

K

L

N

R

S

T

RH

D

Pr

H

T1-T2 oFF

oP1

oP2

OFF c OFF

ON mON

m

3

/s

❶ up and down keys
❷ key [ESC]
❸ key

[ENTER/MENUE]

❶

❷

❸

6

To change the measuring unit push [ENTER/MENUE].
Use the up and down keys [] to select Unit. Push
again [ENTER/MENUE]. On the left corner of the dis­play appears a small 1, which indicates the selected
channel. For changing the channel use the up and
down keys [



] Push [ENTER/MENUE] to confirm.

On the right corner of the display appears °C or °F, or

%rH, td or gm

3

(depending on the selected probe).

Use the up and down keys [



] again to adjust the
requested measuring unit and push [ENTER/MENUE] to
confirm. Push [ESC] to be back in the measuring mode.

1.4.2 Probe selection / [Prob]

Push [ENTER/MENUE] to change a probe. Use the up
and down keys [



] to select Prob. Push [ENTER/

MENUE] to confirm.

On the left corner of the display appears a small 1,
which indicates the selected channel. For changing the
channel use the up and down keys [



]. Push again
[ENTER/MENUE] to confirm. On the right corner of the
display appears the active probe. Use the up and down
keys [



] to change the probe. P

ush [ENTER/MENUE]

to confirm the requested probe.

Push [ESC] to be back

in the measuring mode.

Measurement Probe selection LC-Display Suitable for

(Prob) these types

of measuring

instruments:

Temperature Pt100 (RTD) P700/P705/

P750/P755/P770

P755-LOG/P770-LOG

Temperature Fe-CuNi Type J for all P700-

instruments

Temperature NiCr-Ni Type K for all P700-

instruments

Temperature Fe-CuNi Type L for all P700-

instruments

Temperature NiCrSi-NiSi Type N for all P700-

instruments

Temperature Pt13Rh-Pt Type R P700/P705/

P750/P755/P770

P755-LOG/P770-LOG

Temperature Pt10Rh-Pt Type S P700/P705/

P750/P755/P770

P755-LOG/P770-LOG

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

7

Measurement Probe selection LC-Display Suitable for

(Prob) these types

of measuring

instruments:

Temperature Cu-CuNi Type T for all P700-

instruments

Humidity %rH P750/P755/P770

P755-LOG/P770-LOG

Flow m/s P750/P755/P770

P755-LOG/P770-LOG

Pressure Pa P750/P755/P770

P755-LOG/P770-LOG

Thermal flow m/s P750/P755/P770
probe P755-LOG/P770-LOG

Note: Please check the probe selection to be sure that
the correct probe is entered. If a measurement value is
changed with the ENTER-key at the menu Prob, the
standard calibration will be automatically used.

Indications for the combination probes
(temperature and humidity):

Please adjust relatively humidity as measurement
value for the channel on which the combination probe
is plugged. If you want that the measured temperature
of the plugged combination probe is shown as well,
you have to deactivate the channel on which no probe
is plugged on (see chapter 1.4.6./Chnl).

1.4.3 Difference temperature
(only 2-channel instruments) / [Lin2]

To display the difference temperature push
[ENTER/MENUE]. Use the up and down keys [



] to

select Lin2. Push again [ENTER/MENUE]. On the right
corner of the display appears a T

1-T2

. Use the up and

down keys [



] to adjust the requested selection.
Push [ENTER/MENUE] to confirm. Push [ESC] to be
back in the measuring mode.

Note: Both channel have to be activated for showing
the difference temperature.

1.4.4 Calibration function / [CAL]

Despite high quality manufacturing techniques, each
probe is slightly different from specified standards. To
eliminate inaccuracies caused by exchanging or ageing
of probes, the instrument offer easy calibration func­tions which guarantee that the system accuracy is
always as good as if the instrument was specifically
calibrated to the individual probes in our laboratory.

Important!

Important!

Important!

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

8

The instruments offer three calibration options:

1) [OFF]:Standard characteristic curve (e.g. Pt100­resistance according DIN IEC 60751)

2) [OP1]:Calibration by code (2 x four digit code) is
equivalent to a 2-point calibration
The code is marked clearly by a label on each stan­dard probe.

3) [OP2]:Calibration by physical standard references
(1-point, 2-point or 3-point calibration)

CAL = calibration

Push [ENTER/MENUE] to calibrate the instrument with
sensor. Use the up and down keys

[]

to select CAL.

Push again [ENTER/MENUE]. On the left corner of the
display appears a small 1, which indicates the selected
channel. For changing the channel use the up and down
keys

[].

Push [ENTER/MENUE] to confirm.

Use the up and down keys [] to select the re­quested calibration option. Push [ENTER/MENUE] to
confirm.

Standard linearization
according DIN IEC 60751 / [oFF

Use the up and down keys [



] to select [oFF. Push

[ENTER/MENUE] to confirm.
Push [ESC] to be back in the measuring mode.

Calibration by code / oP1

Use the up and down keys [



] to select oP1. Push

[ENTER/MENUE] to confirm.
On the bottom of the display appears a very small 1,
after this number a four-digit number (Hex-Code/0..F) is
displayed. For changing the number use the up key
[



]. For stepping to the next number use the down key

[



]. If the requested number is complete then push

[ENTER/MENUE] to confirm. Now on the bottom of the
display appears a very small 2, after this number a sec­ond four-digit number is displayed. For changing the
number please follow the manual as before. Push [ESC]
to be back in the measuring mode.

Note: After confirming oP1 by pushing [ENTER/MENUE]
the function oP1 (calibration by code) is activated, even
though you leave the menu by pressing [ESC].

Important!





CAL

oFF oP1 oP2

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

9

Display-indication with active calibration code (OP1):

The CAL -segment and the small 1 on the left indicates
to the user that oP1 is activated.

Calibration by physical standard references / oP2

Use the up and down keys [



] to select oP2. Push

[ENTER/MENUE] to confirm.
On the bottom of the display appears 1 P. For changing
between a 1-Point [1 P], 2-Point [2 P] or 3-Point [3 P] ­calibration use the up and down keys [



].

Example of a 1-Point calibration:

Push [ENTER/MENUE] to confirm. On the display
appears Go. After the displayed measuring value is
stabile push [ENTER/MENUE]. App. 2 seconds later in
the first display line appears P1 (measuring value 1); in
the second display line appears dP. (standing for deci­mal point).

Use the up and down keys [



] to select the number

of digits after decimal point:

dP. = two decimal digits
dP . = one decimal digit

(decimal point is jumping one digit to the right)

Push [ENTER/MENUE] to confirm. On the second line of
the display appears Si -. Use the up and down keys
[



] to select the requested sign.

Si = reference standard shows

a negative measuring value (below 0,00C°)

Si = reference standard shows

a positive measuring value (above 0,00C°)

Push [ENTER/MENUE] to confirm. On the second line of
the display appears Fd 0.
Use the up and down keys [



] to select the re-

quested range:

Fd 0 = below 100,00°C
Fd 1 = above 100,00°C

Push [ENTER/MENUE] to confirm. On the display
appears 00.00. For changing the value use the up key
[



] . For stepping to the next number use the down

key [



]. If the requested value is complete then push
[ENTER/MENUE] to confirm.
Push [ESC] to be back in the measuring mode.

Note: A break of the physical calibration cannot
be done by the [ESC]-button. Switching off the instru­ment can only do a break of the physical calibration.

Important!





oP2

1 P 2 P 3 P