ThermoWorks P770 User Manual

Operation Manual

SERIE

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

DOSTMANN electronic

P700

®

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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

Unit diagram

2

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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

3

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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

4

1

2

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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

=abso-

lute humidity)

Important!

5

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 m ON

m

3

/s

❶ up and down keys
❷ key [ESC]
❸ key

[ENTER/MENUE]

❶

❷

❸

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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 selec-

ted 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. Push
[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 Typ J for all P700-

instruments

Temperature NiCr-Ni Typ K for all P700-

instruments

Temperature Fe-CuNi Typ L for all P700-

instruments

Temperature NiCrSi-NiSi Typ N for all P700-

instruments

Temperature Pt13Rh-Pt Typ R P700/P705/

P750/P755/P770

P755-LOG/P770-LOG

Temperature Pt10Rh-Pt Typ 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

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Measurement Probe selection LC-Display Suitable for

(Prob) these types

of measuring

instruments:

Temperature Cu-CuNi Typ T for all P700-

instruments

Humidity %rF 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!

7

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

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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].





CAL

oFF oP1 oP2

Important!

8

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

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Display-indication with active calibration code(OP1):
The CAL -segment and the small 1 on the left indica-

tes 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 re­quested 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.





oP2

1 P 2 P 3 P

Important!

9

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Display-indication with active calibration code (OP2):
The CAL-segment and the small 2 on the left indica-

tes to the user that oP2 is activated.

1.4.4.1 Calibration function of the combination
probe (humidity/temperature) [CAL]

Each humidity probe of Dostmann electronic is a
combination probe. That means that beside the
humidity sensor these probes also contain a tempe­rature sensor. Both measurement values are plug­ged in the same channel over one probe. Before the
calibrating of both measurement values (humidity
and temperature) the calibrated measurement
value must be adjusted at the menu item Prob

(Probe selection 1.4.2).

The instruments offer three calibration options:

1) [OFF]:Standard characteristic curve (no specific

probes correction will be carried out)

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/rH = humidity & P°C = temperature.

3) [OP2]:Calibration by physical standard references

(1-point, 2-point or 3-point calibration) is only for
the measurement value rH humidity possible

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.

With the up and down keys [



] you can now choo­se between rH for calibration of humidity and P°C for
calibration of temperature.

Use the up and down keys [



] to select the reque­sted calibration option. Push [ENTER/MENUE] to
confirm.





CAL

rH P °C

10

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

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Standard linearization / [oFF

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

Calibration by code / oP1

Use the up and down keys [



] to select oP1. Push
[ENTER/MENUE] to confirm the desired setting. On
the bottom of the display a small 1 appears, 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 key

down [



] . If the requested number is complete
then push [ENTER/MENUE] to confirm. Now on the
bottom of the display appears a small 2 and 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.

1.4.5 Channel activation

(only 2-channel instruments) / [Chnl]

Chnl = channel

To activate or deactivate a measuring channel
push [ENTER/MENUE]. Use the up and down keys
[



] to select Chnl. 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 [



] again to activate on or deactivate

off the requested measuring channel and push

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

Short-Cut: Press 2 seconds the HOLD/MAX/MIN­Button for activate or deactivate channel 2.

Note: As a minimum one channel is active!

1.4.6 Enter Area for volume flow [ArEA]

To enter the area dimensions is only able with instru­ments for measuring airflow.





CAL

oFF oP1 oP2

11

Important!

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

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Push [ENTER/MENUE] and use the up and down
keys [



] to select ArEA. 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 [ENTER/MENUE] to confirm. Use the

up and down keys [



] to select the dimension

unit:

c = Centimeter

2

m = Meter

2

Push [ENTER/MENUE] to confirm.
On the display bottom appears:

00.00

For changing the number use the up key [



] . For

stepping to the next number use the key down [



].
If the requested dimension is complete then push
[ENTER/MENUE] to confirm.

1.4.7 Memory Setup [Lo6]

Only instrument with extension –LOG (e.g. P755­LOG) have got an internal memory.

Push [ENTER/MENUE] and use the up and down
keys [



] to select Lo6. Push [ENTER/MENUE] to

confirm. Use the up and down keys [



] again to
start [on] or Stop [off] the logger. Push [ENTER/
MENUE] to confirm. Use the up and down keys
[



] again to select between automatic storage
[Auto] or manually operated storage [SPot]. Push
[ENTER/MENUE] to confirm]. Use the up and down
keys [



] again to select between to add on data
[Add] and creating a new file [nLo6]. Push [ENTER/
MENUE] to confirm. By selected automatic storage
at the end you have to select the time interval:

1 S 1 second

5 S 5 seconds
10 S 10 seconds
20 S 20 seconds
30 S 30 seconds

1 M 1 minute

2 M 2 minutes

5 M 5 minutes
10 M 10 minutes
20 M 20 minutes

By selected manually operated storage you are able
to save the measurement by pressing ESC by each
time.

Push [ENTER/MENUE] to confirm. Push [ESC] to be
back in the measuring mode. Manual storing [Spot].
Press the key [ESC] to store manually the measuring
values.

12

Unit





MENUE

Prob Lin2 CAL PrEn Chnl ArEA Lo6

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1.5 Recalling the memory data
(HOLD MAX MIN AVE)

After pushing first time the key [HOLD MAX MIN
AVE] the actual value will be hold on the top display
line (big display). Pushing again the key [HOLD MAX
MIN AVE], the saved maximum-, minimum and aver­age value will be displayed in the bottom display line
(small display). Note for 2-channel instruments: First
the MAX-MIN-AVE-values of channel 1 will be dis­played – afterwards the values of the channel 2 will
be displayed. Is there only one probe on a 2-channel
instrument we suggest to deactivate the channel
without probe (menu Chnl).

Note:

During the recall of the memory data the extremes
(MAX MIN) and the average value (AVE) will not be
calculated or carried on.

Clearing the memory (MAX MIN AVE)

Press [CLEAR] key once to erase the stored maxi­mum, minimum and average from memory. On the
display appears Clr. – After erasing the memory the
instrument automatically switches back to measur­ing mode indicating the actual measured value again.

1.6 Measuring rate (FAST-mode)

Press [FAST/



]key once to change the measuring
rate. Now the measuring rate is app. 4 measure­ments per second. Press [FAST/



] key again and the
instrument is back in the standard mode (1 measure­ment per second).

Note:

In the fast mode the battery consumption is three
times higher than in the standard mode.

1.7 AUTO-OFF-function

dAoF = Disable Auto-off
EAoF = Enable Auto-off

Press [ESC/AUTO-OFF] key once. On the display
appears EAoF. Now the instrument switches off
automatically after app. 30 minutes. Press
[ESC/AUTO-OFF] key again. On the display appears

dAoF. Now the Auto-Off-function is deactivated.

1.8 Special-functions

(Ohm/Micro volt/Volt/Hertz-display)

If you want to get the shown value displayed accord­ing to the basic units you will have to push, when
you switch on, the keys FAST and ON/OFF at the
same time for approximately 3 seconds till the next
basic unit appears:

Important!

Important!

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o = Ohm (Pt100)
H = Hertz (flow m/s)
u = Micro volt (thermocouples)
U = Volt (humidity)

1.8.2 Zero adjustment

A long press on the F1 button (approx. 3 s) enables
you to set the displayed value on 0. Before pressing
the button make sure that the actual value also amo­unts to 0 (no current/pressure at the probe).

1.8.3 Deactivation of the 2nd channel (toggle)

A long press on the HOLD button (approx. 3 s) ena­bles you to activate or deactivate the 2nd measuring
channel.

For the power supply of the instrument a 9 Volt dry
battery is used. To exchange the battery switch of
the instrument and open the battery cover on the
backside of the instrument. Remove and disconnect
the battery from the instrument. Connect a new 9 V
battery to the plug and put the battery back into the
instrument.

By showing the segment the instrument indi­cates, that the battery has to be exchanged. After
showing the segment the instrument allows
app. 1 hour of further measuring.

Attention:

Please do not dispose of old electronic devices and
empty batteries in household waste. To protect the
environment, take them to your retail store or to
appropriate collection sites according to national or
local regulations.

14

2. Power supply

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By displaying the following error codes the instru­ment support the operation of the instrument.

Error Meaning

oPEn no probe

or wrong probe is connected

|

­oLo

„too low“ – underflow of the
measuring range

|

­oHi „too high“ – exceeding of the

measuring range

|

­Er1

temperature of the cold
junction above the measuring
range

|

­Er2

temperature of the cold
junction above the measuring
range

E15 low battery – (battery is com-

pletely exhausted)

E19 low battery – (battery is com-

pletely exhausted)

E1d low battery – (battery is com-

pletely exhausted)

E16 time out / auto-off-function

E1o time out / auto-off-function

E1e time out / auto-off-function

E23 EE-prom destroyed or

EE-prom index is wrong

E25 EE-prom destroyed or

EE-prom index is wrong

E31 temperature of cold junction

out of range

15

3. Error Codes

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P700 (1-channel) / P705 (2-channel)

Inputs 1/2 Pt100,

thermocouple:
type K, J, L, N, R, S, T

Measuring range

Pt100 -200...+850 °C
Thermocouple according DIN (-200...1760°C)

Accuracy

Pt100 ±0,1 °C from -100 °C...+200 °C

0,1% remaining range

Thermocouple
R, S ±1,0 °C +0,1%

K, J, L, N, T ±0,2°C from 0°C...+200 °C

±0,5°C to 1000 °C
±1,0 °C remaining range

Resolution 0,1°C

Ex-mark –––

Battery life appr. 20 hours

Connectors DIN 8-pole

Allowable
operating temp. 0 °C ... +40 °C

Display 2-line LCD

Housing plastic

Dimensions 200 x 93 x 44 mm (LxWxH)

Weight 350 g

Power supply 9 V battery

4. Technical data

16

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P710 (1-channel) / P715 (2-channel)

Inputs 1/2 thermocouple:

type K, J, L, N, T

Measuring range

Pt100 –––
Thermocouple according DIN (-200...1370°C)

Accuracy

Pt100 –––
Thermocouple
R, S –––

K, J, L, N, T ±0.2 °C from 0 °C...+200 °C

±0.5 °C to 1000 °C
±1.0°C remaining range

Resolution 0.1°C

Ex-mark –––

Battery life appr. 20 hours

Connectors DIN 8-pole

Allowable
operating temp. 0 °C ... +40 °C

Display 2-line LCD

Housing plastic

Dimensions 200 x 93 x 44 mm (LxWxH)

Weight 350 g

Power supply 9 V battery

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P750 (1-channel) / P755 (2-channel)

Inputs 1/2 Pt100,

thermocouple:
type K, J, L, N, R, S, T,
humidity, flow
resistance, voltage

Measuring range

Pt100 -200...+850 °C

Thermocouple according DIN (-200...1760°C)

Resistance 0 ... 400 

Humidity 0 %...100 %rH

Flow 0 ... 40 m/s

Accuracy

Pt100 ±0.03°C from -50°C...+199.99°C

±0.05°C from -200°C...-50.01°C
otherwise 0.05%

Thermocouple
R, S ±1.0 °C +0.1%

K, J, L, N, T ±0.2 °C from 0 °C...+200 °C

±0.5 °C to 1000 °C
±1.0°C remaining range

Humidity ±1.5%rH

Flow 1% of end value

Resistance 0.5%

Resolution 0.0 1°C from -200 °C...+200 °C,

otherwise 0.1°C,
respectively 0.1%

Ex-mark –––
Battery life appr. 20 hours
Connectors DIN 8-pole

Allowable
operating temp. 0 °C ... +40 °C

Display 2-line LCD
Housing plastic
Dimensions 200 x 93 x 44 mm (LxWxH)
Weight 350 g
Power supply 9 V battery

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P770 (2-channel)

Inputs 1/2 Pt100,

thermocouple:
type K, J, L, N, R, S, T,
humidity, flow

Measuring range

Pt100 -200...+850 °C

Thermocouple according DIN (-200...1760°C)

Resistance –––

Humidity 0 %...100 %rH

Flow 0 ... 40 m/s

Accuracy

Pt100 ±0.1 °C from -100 °C...+200 °C

otherwise 0.1%

Thermocouple
R, S ±1.0 °C +0.1%

K, J, L, N, T ±0.2 °C from 0 °C...+200 °C

±0,5 °C to 1000 °C
±1.0°C im remaining range

Humidity ±1.5%rH

Flow 1% of the final value

Resistance –––

Resolution 0.1°C, 0.1% and 0.1 m/s

Ex-mark –––
Battery life appr. 20 hours
Connectors DIN 8-pole

Allowable
operating temp. 0 °C ... +40 °C

Display 2-line LCD
Housing plastic
Dimensions 200 x 93 x 44 mm (LxWxH)
Weight 350 g
Power supply 9 V battery

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20

P755-LOG (2-channel)

Inputs 1/2 Pt100,

thermocouple:
type K, J, L, N, R, S, T,
humidity, flow
resistance, voltage

Measuring range

Pt100 -200...+850 °C

Thermocouple according DIN (-200...1760°C)

Resistance 0 ... 400 

Humidity 0 %...100 %rH

Flow 0 ... 40 m/s

Accuracy

Pt100 ±0.03°C from -50°C...+199.99°C

±0.05°C from -200°C...-50.01°C
otherwise 0.05%

Thermocouple
R, S ±1.0 °C +0.1%

K, J, L, N, T ±0.2 °C from 0 °C...+200 °C

±0.5 °C to 1000 °C
±1.0°C remaining range

Humidity ±1.5%rH

Flow 1% of end value

Resistance 0.5%

Memory appr. 6,000 measurements

Resolution 0.0 1°C from -200 °C...+200 °C,

otherwise 0.1°C,
respectively 0.1%

Ex-mark –––
Battery life appr. 20 Std.
Connectors DIN 8-pole

Allowable
operating temp. 0 °C ... +40 °C

Display 2-line LCD
Housing plastic
Dimensions 200 x 93 x 44 mm (LxWxH)
Weight 300 g
Power supply 9 V battery

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P770-LOG (2-channel)

Inputs 1/2 Pt100,

thermocouple:
type K, J, L, N, R, S, T,
humidity, flow

Measuring range

Pt100 -200...+850 °C

Thermocouple according DIN (-200...1760°C)

Resistance –––

Humidity 0 %...100 %rH

Flow 0 ... 40 m/s

Accuracy

Pt100 ±0.1 °C from -100 °C...+200 °C

otherwise 0.1%

Thermocouple
R, S ±1.0 °C +0.1%

K, J, L, N, T ±0.2 °C from 0 °C...+200 °C

±0,5 °C to 1000 °C
±1.0°C im remaining range

Humidity ±1.5%rH

Flow 1% of the final value

Resistance –––

Memory appr. 6,000 measurements

Resolution 0.1°C, 0.1% and 0.1 m/s

Ex-mark –––
Battery life appr. 20 hours
Connectors DIN 8-pole

Allowable
operating temp. 0 °C ... +40 °C

Display 2-line LCD
Housing plastic
Dimensions 200 x 93 x 44 mm (LxWxH)
Weight 350 g
Power supply 9 V battery

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P700

Measuring value 1 + 2 autom. recognize FC (hex)
Enabling the keyboard 0 (hex)
Read version number of firmware l (ASCII)
Read memory (only LOG-instruments) n (ASCII)

Attention: By sending the command FC(hex) you
will get the complete data, the instrument lock auto­matically the keyboard. To release the keyboard you
have to send the command 0 (hex).

The datas would be sent in the following format.

Data Type = String

The length of the string depends on the instrument
(a two-channel or one-channel instrument).

5. Interface protocol

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6. Connector layout

Connector layout Pt100 4-wire (series P700)

Measuring channel 1 /2

Pt100 4-Wire

Soldering

Side

Connector layout thermocouple (series P700)

Measuring channel 1 /2

Pt100 2-Wire
In the plug

NiCr-Ni thermocouple

Soldering

Side

International colours of thermocouples
Thermocouple DIN 43 722 DIN 43 710 ANSI MC 96.1
Type R orange white green

Pt13Rh-Pt + orange – white + red - white + black - red

Type S orange white green

Pt10Rh-Pt + orange – white + red - white + black - red

Type J black black

Fe-CuNi + black - white + white - red

Type T brown blue

Cu-CuNi + brown - white + blue - red

Type K green ....green yellow

NiCr-Ni + green - white + red - green + yellow - red

Type N rosa

NiCrSi-NiSi + pink - white

Type L brown

Fe-CuNi + red - blue

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Connector layout of a probe for flow Mini Air6 (series P750/P755/670)

Measuring channel 1 /2

Soldering side

Mini Air6 Impeller

blackwhiteyellow

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Adaptor DIN Connector for Thermocouples Socket (series P700)

Measuring channel 1 /2

Soldering

side

Pt100 2-wire
In the plug

midget thermocouple connector

gn (ws)

rt (gn)

cable length 12 cm

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26

Our quality-probes are the main reason for the preci­sion and quality of your measuring. To facilitate the
exchange of a probe without a loss of precision, our
probes were measured in our company and added
with a code that describes the characteristic line of
the probe. The code is attached well visible on a
label on the probe.

If you change the probe you have to enter the code
into the measuring instrument. In order to avoid any
problems later on (esp. if the probe is installed some­where hard accessible, or if there are several of
those external probes in use), we recommend to
note down the two values:

Art.No.:
Appellation:
Serial number:
Calibration data:

Art.No.:
Appellation:
Serial number:
Calibration data:

Art.No.:
Appellation:
Serial number:
Calibration data:

Art.No.:
Appellation:
Serial number:
Calibration data:

Art.No.:
Appellation:
Serial number:
Calibration data:

7. Data of probe-calibration

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With regular use guarantee lasts 12 months for the
instruments and 6 months for the probes and sen­sors. Opening of the instruments leads to expiration
of guarantee.

The producer guarantees that his product will not
have any material defect or defect in workmanship
during the above-mentioned period if the product is
accordingly used and maintained. Exceptions are
defined in the following way:

The guarantee does not apply for batteries and
fuses. The guarantee does not enclose products that
are damaged, used improperly or negligent, prac­tised or stored improper.

These guarantee conditions replace all possible
expressly or tacitly confirmations. No liability will be
assumed for special, casual or constructive damages
when it occurs through unauthorized act or through
another way even if it is within the contract.

8. Guarantee

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Technische Änderungen vorbehalten • Stand 08/10 • © DOSTMANN electronic GmbH

®

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