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13

1. Serial Data output

The serial data is sent to the data output pin (pin 10)
twice every A/D conversion cycle. The data format
complies with JIS 7BIT transmission code with a baud
rate of 2400. The host can use the RS232 interface to
read the data. A single data packet allows a start bit
(always 0), 7 data bits, an odd parity check bit, and a
stop bit (always 1). The high and low voltage levels
correspond to +V and -3V respectively. The serial output
remains at 1 (high) when it is inactive. Hence the start
bit (0) could be used as the triggering signal to begin
the reading process. The following figure shows the
data format of a single packet. The LSB is sent first
and the MSB is sent last.

One data block consists of 11 packets, or 110 bits. The
following figure shows the format of a data block. The
range packet indicates the full scale range of the meter.
Digit 3 through to digit 0 represent the digits on the
meters display. The function packet indicates the
measurement mode of the meter. Status, option 1, and
option 2 give the status of the meter. CR and LF are
delimiters used to separate the blocks.

The meter always outputs the current input value to the
serial port regardless of whether the hold function has
been activated or not. Each block is repeated twice in
one conversion cycle. The detailed data format of each
packet is listed below.

2. Function

This packet indicates the measurement mode of the
meter. The following table summarises the transmitted
code for each mode. Note that the encoding of this
packet is different to the encoding of the FC1 to FC4
switch.

3. Range

This packet indicates the full scale range of the meter.
When the meter is in current mode (A) this packet is
always 0110000 since the full scale range in this mode
is fixed. The following table shows the codes for each
range.

4. Digit 3 to digit 0

Digit 3 is the most significant digit on the LCD panel,
and the digit 0 is the least significant digit. When the
LCD panel shows OL the serial port outputs 4000.

5. Status

The format of this packet is shown below. (The judge
field is not applicable to these units, but will be present
in the data field- it should be disregarded). The sign
field indicates whether the minus sign on the LCD is
ON or OFF. The Batt field indicates if the battery low
condition is true. OL indicates input overflow.

6. Option 1

This packet contains information on special measurement
modes. The format of this packet is shown below. The
three none constant fields are set to "1" when the meter
operates in the corresponding special modes, max and
min. Bit 0 (VAHZ) is not applicable.

0

1

LSB   

      MSB

0                       1 0                      1 0                       1

0                       1 0                      1 0                       1

0                       1 0                      1 0                       1

0                       1 0                      1

  range      

   digit3

    digit2

  digit1      

   digit0

   function

  status      

  option1

   option2

  CR

     

      LF

Code

Measurement Mode

0111011

Voltage

0111101

µA Current

0111001

mA Current

0111111

A Current

0111110

ADP0

0111100

ADP1

0111000

ADP2

0111010

ADP3

Code

V

mA

µA

0110000

400.0 mV

40.00 mV

400.0 µA

0110001

4.000 V

400.0 mA

4000 µA

0110010

40.00 V

0110011

400.0 V

0110100

4000 V

0110101

Digit

Code

0

110000

1

110001

2

110010

3

110011

4

110100

5

110101

6

110110

7

110111

8

111000

9

111001

0

1

1

Judge Sign BATT

OL

Bit 6 Bit 5 Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0

1

1

Pmax Pmin

0

VAHZ

Bit 6 Bit 5 Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Содержание DPM802-TW

Страница 1: ...Manual de utilizacion Istruzioni per l uso Digitalmultimeter f r Schalttafeleinbau Panel Mount Digital Multimeters Multim tres Num riques mont s sur bandeau Mult metros digitales montados en panel Vol...

Страница 2: ...5 Linearit t 0 1 Vollskala Musterrate 1 Sek Eingangsimpedanz V 10 M 0 bis 399 9 A 500 400 bis 3999 A 50 0 bis 39 9 mA 5 40 bis 399 9 mA 0 5 0 bis 10 A 0 005 Anschl sse Messeingang Schraubanschl sse f...

Страница 3: ...stoppen Vorgang wiederholen 13 MAX MIN Modus Um den MAX MIN Modus zu starten Pin 8 kurzzeitig 100 mS mit Pin 5 oder Pin 7 verbinden Um den MAX MIN Modus zu beenden Pin 8 kurzzeitig 2 S mit Pin 5 oder...

Страница 4: ...ple Rate 1 sec Input impedance V 10 M 0 bis 399 9 A 500 400 bis 3999 A 50 0 bis 39 9 mA 5 40 bis 399 9 mA 0 5 0 bis 10 A 0 005 Connections Messeingang Schraubanschl sse f r Kabel bis zu 1 5 mm Power a...

Страница 5: ...ata stream Repeat process to stop 13 MAX MIN Mode Connect Pin 8 with Pin 5 or Pin 7 100 mS to start MAX MIN Modus Connect Pin 8 with Pin 5 or Pin 7 2 S to stop MAX MIN Modus 0 Displaying current value...

Страница 6: ...e Connexions vis prot ge doigts pour fil jusqu 1 5 mm Alimentation et commande 2 x 5 voies espacement de 0 1 Entr es de commande Collecteur ou contact uniquement Sortie RS232 2 400 bauds 7 bits parit...

Страница 7: ...er le flux de donn es RS232 Brancher de nouveau la commande commune pour arr ter 13 Mode MAX MIN 0 Affichage de la valeur actuelle 1 Affichage de la valeur maximale pr c dente 2 Affichage de la valeur...

Страница 8: ...0 A 0 005 Conexiones Entrada Conexiones tornillo a prueba de dedos para cables de hasta 1 5 mm Alimentaci n y control 2 x 5 v as 0 1 pulg paso Entradas de control S lo absorci n o contacto Salida RS23...

Страница 9: ...2 Conectar a control com n una vez para comenzar el tren de datos RS232 Conectar a control com n otra vez para detener 13 Modo M X M N 0 Indica el valor actual 1 Indica el valor m ximo anterior 2 Indi...

Страница 10: ...collegamenti con viti di protezione per cavi fino a 1 5 mm Alimentazione e controllo 2 x 5 vie spaziatura 0 1 Ingressi di controllo Solo contatto o sink Uscita RS232 2400 baud 7 bit parit dispari 1 b...

Страница 11: ...ato il flusso di dati RS232 Collegare nuovamente al controllo comune per arrestare 13 Modalit MAX MIN 0 Visualizza il valore corrente 1 Visualizza il valore massimo precedente 2 Visualizza il valore m...

Страница 12: ...oltage Tension Voltaje Tensione AC Spannung Voltage Tension Voltaje Tensione DC Strom Current Courant Corriente Corrente Elektrischer Verbraucher electrical load charge lectrique carga el ctrica caric...

Страница 13: ...s packet is different to the encoding of the FC1 to FC4 switch 3 Range This packet indicates the full scale range of the meter When the meter is in current mode A this packet is always 0110000 since t...

Страница 14: ...that the meter operates in DC mode measuring voltage or current The AC mode indicates that the meter operates in AC mode measuring voltage or current The APO field is not applicable 8 CR Carriage Ret...

Страница 15: ...15 Abmessungen Dimensions Dimensiones Dimensioni PANEL CUT OUT 33 x 68mm 0 5 0 0 1 3 x 2 68 94 02 0 0...

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