Baumer AT42 Manuel d'utilisation

Page 2

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INSTRUCTION LEAFLET - AT42 RTD thermometer

320023 ind a 05/201

Baumer Bourdon-Haenni S.A.S. · 125, rue de la Marre · B.P. 70214 · 41103 Vendôme Cedex · France

Tél. +33 (0)2 54 73 74 75 · Fax France +33 (0)2 54 73 74 74 · Fax Export +33 (0)2 54 73 74 73

[email protected] · www.baumer.com/process

RTD platinum sensor input

Resolution 1 °C or 0.1 °C

Display 4 digits

2 independent alarm switches

Average value feature

Analog adjustable output 4-20 mA (0-20 mA) or 0-10 VDC

AT42 is a digital thermometer dedicated to RTD input sensor and provides 2 independent alarms switches.

An analog output is available, defined when ordering : current output (4-20 mA or 0-20 mA) or voltage output

(0-10 VDC). Keys located behind the front panel filter allow quick and easy adjustment of the display scale

and the alarm switches values, both in engineering units. You can also use the average value feature to

smoothen the transient process value display.

An easy menu allows the access to the values and functions even when these are no often modified :

analog output adjustment, status of the alarms relays (NO/NC), calculation features (square root,minimum-

maximum). AT42 is a panel digital indicator which electrical connections are done through a screw plug-in

terminal. LED display is a 10000 points, 14 mm-high unit with an accuracy of 0.1 °C or 1 °C according to the

desired range and resolution.
Input and signal conditioning

RTD sensor 100 Ω at 0 °C - 3 wires

Resolution 0.1 °C on the range : -200 ... +450 °C

Resolution 1 °C on the range : -200 ... +450 °C

Linearization as per DIN43760

Protection against overvoltage ± 20 V - Common mode protection 500 V

Line compensation 0.15 % reading/100 Ω up to 500 Ω

Thermal drift 0.01 °C/°C

7 readings pe second

Display

-1999 ... +9999 counts, red LED

Overrange display : ± dEP
Power supply

Standard 230 V 50 Hz - Consumption 6 W

On request : 110 V 50 Hz - 48 V 50 Hz - 24 V 50 Hz

Option : 24 VDC
Environmental

Operating temperature : from 0 ... 50 °C

Storage temperature : from -40 ... +85 °C
Housing

Noryl case (panel mounting) - Connected by a pull-out, screw-on terminal block

Dimensions (mm) : front panel 48x96 - Depth 133 - Overall depth 151

Cut out 43x92 - Fixed by means of screw clips

Rated IP 20 protection

Door option rated IP 55
Analog output

To be defined when ordering as current output (4-20 mA or 0-20 mA) or as voltage output (0-10 VDC) the

analog output values low-scale and high-scale values are adjustable on the full range from -2000 ... +10000

counts. Non isolated output.
Current output :

• Select 4-20 mA or 0-20 mA by program

• Maximum voltage load on a 750 Ω shunt (15 V)

• Maximum current limited to 50 mA

Voltage output :

• 0 ... 10 VDC

• Accuracy 0.1 %

• Response time : 150 ms

• Maximum current limited to 10 mA

• Output load < 75 Ω

Alarm switches

2 independent alarm switches, programmed from the front panel after removing the front filter. Fully adjusta-

ble switches on the display range (-1999 ... +9999 counts) - Accuracy 1 count.

Relays : 1A, 230 VAC, 1A, cos j 0.7

Status LED's on the front panel

Possibility to reverse the relay action
Connections

The equipment bears the CE mark, in accordance with directive 89/336/CEE - electromagnetic compatibility.

This system meets the following standards : EN 50081-2 and EN 50082-2.

Configuration of the indicator and adjustment of the analog output

To configure the indicator, remove the front filter and use + and - keys and programming switches.

1 2 3 1 2 3 4

power

alarms

(NE)

Mains 230 V (PH)

Mains 230 V

AN 42

Al1 Al2

RTD sensor

analog output

AT 42

1 2 3 4 5 6 7

on = programming mode

1 : Full scale display

2 : Zero display

3 : Decimal point

4 : on = average value active

blinking = programming
5 and 6 : see paragraph 4

7 : Alarm 1

8 : Alarm 2

When the front filter is removed, the system is no longer protected from electrostatic discharges on the front

panel (801-2). Proper precautions must be taken when programming, as the unit is not in it's normal opera-

ting configuration.
1- Selecting the resolution 0.1 °C or 1 °C

Toggle programming switch nb

3 in on position.

Push the

+ key to select the resolution.

When the disired value is reached, toggle programming switch nb

3 in off position.

2 - Activating the average value feature

To activate the average value, toggle programming switch nb

4 in on position.

To come back to the direct display, toggle programming switch nb

4 in off position.

3 - Programming the alarms switches

Toggle programming switch nb

7 in on position (alarm 1).

Display will give the value of the alarm switch

Use

+ key to increase or - to decrease until you reach the desired value.

Then toggle programming switch nb

7 in off position.

Do the same toggle programming switch nb

8 for alarm 2.

4 - Access to the internal menu

Display type : measure, minimum, maximum

Through switches nb

5 and 6, menu allows to configure the analog output, alarm relays status, measurement

resolution, complementary choices for calculation functions (minimum, maximum).

5 - When programming, the rightest decimal point is blinking

Adjustment

1 - Connect a 285 Ω ± 0.005 Ω resistor to the input

2 - Toggle programming switches nb

1 and 3 in on position use + and - keys to display 432.0 toggle switches

1 and 3 in off position.

3 - Connect a 100 Ω ± 0.005 Ω resistor to the input.

4 - Toggle programming switches nb

2 and 3 in on position use + and - keys to display 0. Toggle switches nb

1 and 3 in off position.

To reset the indicator to the genuine calibration values, switch it on while pushing the

+ key. Display will be "Init".

DIP5

DIP6

+ -

Full scale analog output adjustment

Low scale analog output adjustment

0-20 mA or 4-20 mA

analog output offset

Alarm relay 1

Alarm relay 2

Resolution

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