Yokogawa VJU7 User Manual

User’s

/
/

Manual

IM 77J01U07-01E

Model VJU7
Universal Temperature Converter
(Isolated Single-output and
Isolated Dual-output Types)

1. CAUTIONARY NOTES FOR SAFE
USE OF THE PRODUCT

This user’s manual should be carefully read before installing
and operating the product. The following symbol is used on the
product and in this manual to eusure safe use.

WARNING

This symbol is displayed on the product when it is
necessary to refer to the user’s manual for infor­mation on personnel and instrument safety. This
symbol is displayed in the user’s manual to indi­cate precautions for avoiding danger to the opera­tor, such as an electric shock.

The following symbols are used only in this manual.

IMPORTANT

Indicates that operating the hardware or software
in a particular manner may cause damage or result
in a system failure.

NOTE

Draws attention to essential information for under­standing the operations and/or functions of the
product.

4. MODEL AND SUFFIX CODES

VJU7-0 -

Model
Number of outputs

1: 1 output
2: 2 outputs

Power supply
6: 100-240 V AC/DC
7: 15-30 V DC (Operating range: 12 to 36 V)

Input signal
U: Thermocouple, RTD, mV signal

Output-1 signal
A: 4 to 20 mA DC
6: 1 to 5 V DC
Z: (Custom Order) DC current or voltage signal

Output-2 signal
A: 4 to 20 mA DC
6: 1 to 5 V DC
P: Communication function (RS-485)
T: Alarm output (2 relay contacts)
N: No output-2 signal

Optional specification
Blank: With socket

SN: Without socket
RJCN: Without RJC sensor

(Operating range: 85 to 264 V)

0/

2.

CHECKING PRODUCT SPECIFICATIONS
AND PACKAGED ITEMS

(1) Model and Specifications Check

Check that the model and specifications indicated on the
nameplate attached to the side face of the main unit are as
ordered.

(2) Contents of the Package

Check that the package contains the following items:

● VJU7: 1

● User’s manual (this manual: IM 77J01U07-01E): 1

Accessories:

● Tag number label: 1 sheet

● Range label: 1 sheet

● RJC sensor (when /RJCN is not specified for the

optional specification): 1

3. GENERAL

This plug-in type Universal Temperature Converter receives
thermocouple, RTD or mV signal and converts it into isolated
DC voltage or current signal.

• Settings of the input type (thermocouple, RTD or mV)
and measurement range can be changed within the
specified ranges.

• One of DC voltage signal, DC current signal, communi­cation function (RS-485) and alarm output (2 relay con­tacts) can be selected for the output-2 signal.

Keep this manual in a safe place.

Network Solutions Business Divisiion

2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan
Phone: [phone] Facsimile: [phone]

IM 77J01U07-01E
©Copyright Nov. 1999
4th Edition: Feb. 2007

2

5. MOUNTING METHODS

5.1 Wall Mounting

Loosen the main unit-fixing screw to disconnect the main
unit from the socket. Next, anchor the socket onto the wall
with screws. Then, plug the main unit into the socket and se­cure the main unit with the main unit-fixing screw.

Socket

Main unit

Main
unit-fixing
screw

<Mounting Dimensions>

29.5 or more
22±0.2

59±0.3

2-M4 or 2-ø4.5 or more

5.2 DIN Rail Mounting

Locate the VJU7 so that the DIN rail fits into the upper part
of the DIN-rail groove at the rear of the socket, and fasten
the socket using the slide lock at the lower part of the
socket.

Fit into here

DIN rail

Push

DIN rail

Hole for main
unit-fixing screw

Mounting
screws

Unit: mm

(Rear of the socket)

Slide lock

DIN rail

6. INSTALLATION LOCATIONS

•

Avoid the following environments for installation locations:
Areas with vibrations, corrosive gases, dust, water, oil,
solvents, direct sunlight, radiation, a strong electric field,
and/or a strong magnetic field.

•

If there is any risk of a surge being induced into the power
line and/or signal lines due to lightning or other factors, a
dedicated lightning arrester should be used as protection
for both the product and a field-installed device.

7. EXTERNAL WIRING

WARNING

To avoid the risk of an electric shock, turn off the
power supply and use a tester or similar device to
ensure that no power is supplied to a cable to be
connected, before carring out wiring work.

Wiring should be connected to the terminals on the socket of the
VJU7. The terminals for external connections are of M3 screws.
Use crimp-on lugs for connections to the terminals.

• Be sure to use a compensating lead wire for thermo­couple input.
Recommended cables: A nominal cross-sectional area
of 0.5 mm2 or thicker for output signal cable, a nominal
cross-sectional area of 1.25 mm2 or thicker for power
cable and shielded twisted-pair cable (AWG24) for com­munication cable.

RJC sensor

Input signal

Make the wiring resistance
of RTD input terminals 1
and 3 the same.

Recommended crimp-on lug size

(Unit: mm)

(Input type can be changed.)

mV

+

1

–

3

5.5 or less

(for thermocouple input)

RTD

Thermocouple

A

1

B

3

B

4

Power supply

Signal
line

RJC
sensor

Terminal
screw

ø3.2 to 3.5

5.5 or more

RJC

L+

N–

GND

+

1

–

3

4

10

11

8

Ouptut-1
signal

Analog output

3 2

7

9

56

1011

+

–

Output-2 signal

Analog output

+

2

–

5

Alarm output

1

4

789

2

5

6

RS-485

B+

2

A–

5

6

COM

ALM1

(NO)

COM

ALM2

(NO)

5.3 Mounting Using a Multi-mounting Base

For mounting using a multi-mounting base, see the user’s
manual for VJCE (VJ Mounting Base).

5.4 Using a Duct

Wiring duct should be installed at least 30 mm away from
the top and bottom faces of the main unit.

IMPORTANT

●

Connect the RJC sensor at the correct position
as shown above. Otherwise tempratures cannot
be measured carrectly.

●

Conect the RJC sensor so that it overlaps the in­put signal line.

●

Handle the RJC sensor lead wire care to prevent
disconnection.

All Rights Reserved. Copyright © 1999, Yokogawa M&C Corporation IM 77J01U07-01E 4th Edition Feb. 09, 2007-00

●

(

)

[

]

e

d

Use of the product ignoring the specifications
may cause overheating or damage. Before turn­ing on the power, ensure the following:

(a)Power supply voltage and input signal value

applied to the product should meet the required
specifications.

(b)The external wiring to the terminals and wiring to

ground are as specifications.

●

Do not operate the product in the presence of
flammable or explosive gases or vapors. To do
so is highly dangerous.

●

The product is sensitive to static electricity; ex­ercise care in operating it. Before you operate
the product, touch a nearby metal part to dis­charge static electricity.

●

If an inductance (L) load such as auxiliary relays
or solenoid valves is used, always insert a spark
killer for diminishing sparks, such as a CR filter
or a diode in parallel with the inductance load.
Otherwise a malfunction or relay failure may oc­cur. Refer to the following guidelines for a ca­pacitor and resistor:
Capacitor : 0.5 to 1 mF with respect to a contact

current of 1 A

Resistor: 0.5 to 1 W with respect to a contact

voltage of 1 V

●

The power line and input/output signal lines
should be installed away from noise-generating
sources. Otherwise accuracy cannot be guaran­teed.

●

The grounding resistance must be 100 W (JIS
Class D grounding). The length and thickness of
the grounding cable should be as short and
thick as possible. Directly connect the lead from
the ground terminal (terminal no. 8) of the prod­uct to the ground. Do not carry out daisy­chained inter-ground terminal wiring.

8. DESCRIPTION OF FRONT PANEL ND
CONNECTION OF SETTING OOLS

8.1 Front Panel

The communications connector on the front panel is used for
setting up parameters using a PC (VJ77 PC-based Param­eters Setting Tool) or the Handy Terminal (JHT200). The
alarm indicator lamps for alarm 1 and alarm 2 light up if an
alarm occurs. (The alarm indicator lamps are added only
when the alarm output is specified for the output-2 signal.)

Communication connector

Alarm indicator lamp

(for alarm 1)

Alarm indicator lamp

(for alarm 2)

Fig. 8.1 Front Panel

8.2 Connecting the Setting Tools

Connect the modular jack conversion adapter (E9786WH) to
the JUXTA communication cable with 5-pin connector
(F9182EE) and then connect this adapter to the communica­tion connector of JUXTA.

ALM1

ALM2

3

JUXTA communication cable with
5-pin connector (F9182EE)

JHT200
Handy Terminal

PC with th
VJ77 installe

Fig. 8.2 Connecting the Setting Tools

Note: The modular jack conversion adapter does not

9. SETTING PARAMETERS

Set the parameters using a PC (VJ77 PC-based Parameters
Setting Tool) or the Handy Terminal (JHT200). Refer to the list
of parameters in this manual and the user’s manual for VJ77
PC-based Parameters Setting Tool (IM 77J01J77-01E) or
JHT200 Handy Terminal (IM JF81-02E).

NOTE

For the input sensor type, input type and tempera­ture unit, the default values of the input range,
alarm setpoints and others are pre-defined accord­ing to the values to be selected. Set the parameters
as follows.

1. Settings related to inputs: Set the parameters in

2. Before setting the parameters related to alarm

9.1 Settings Related to Input and Output

9.1.1 Input Sensor Type and Input Type

Select the input sensor type in D07: SENSOR TYPE. Select
TC for thermocouple input, mV for mV input and RTD for
RTD input. When you have selected TC in D07, select the
TC type to use in D08: TC TYPE. When you have selected
RTD in D07, select the RTD type to use in D09: RTD TYPE.
Furthermore, for thermocouple or RTD input, select the tem­perature unit in D15: UNIT.

[Comes with VJ77 and JHT200]

Modular jack conversion
adapter (E9786WH)
[Comes with VJ77]

Dedicated adapter (E9789HA)
[Comes with VJ77]

Dedicated cable

Comes with VJ77

come with the JHT200 Handy Terminal.
It is sold separately.

E9786WK

order starting with (1).

(1) Input sensor type
(2) Input type
(3) Temperature unit for temperature input
(4) Input hard range
(5) Input range

output and making the adjustments such as wir­ing resistance correction and output correction,
set the parameters described in 1 above.
If setting the parameters (1) to (3) in 1 above af­ter setting the parameters related to alarm out­put or making the adjustment, the setpoint will
be changed or the adjustment will be reset to
the default.

IM 77J01U07-01E 4th Edition Feb. 09, 2007-00

4

9.1.2 Input Hard Range

Select the input hard range from among AUTO, HIGH,
MIDDLE and LOW in D17: SELECT RANGE. In general, se­lect AUTO.

● AUTO: Sets the most appropriate input hard range auto­matically with respect to the input range to be set.

● HIGH: For RTD input, for a span of 130 Ω or more in an
input range of 0 to 520 Ω based on the reference
resistane table.

● MIDDLE: For thermocouple or mV input, for a span of

27.5 mV or more in an input range of 10 to 100 mV con­verted into thermoelectromotive force. For RTD input, for
a span of 38.5 Ω or more in an input range of 0 to 176 Ω
based on the reference resistane table.

● LOW: For thermocouple or mV input, for a span of 10
mV or more in an input range of -2.5 to 25 mV converted
into thermoelectromotive force.

NOTE

The conditions for the input hard range (HIGH,
MIDDLE and LOW) are specified for operations
within the range of accuracy rating. The input
range may be set to a range not meeting these con­ditions, but take note of accuracy limitations. Simi­lar accuracy limitations exist even when AUTO is
selected. For more information on accuracy limita­tions, see the general specifications of VJU7 (GS
77J01U07-01E).

9.1.3 Input Range

Set the 0% value of input range in D22: INPUT1 L_RNG and
the 100% value of input range in D23: INPUT1 H_RNG nu­merically within the following specified range.

Input type

Thermocouple input
Type K (CA)
Type T (CC)
Type E (CRC)
Type J (IC)
Type R
Type S
Type B
Type N
Type W3
Type W5

Pt100 (ITS-90)
Pt100 (IPTS-68)
JPt100 (JIS'89)
Pt50 (JIS'81)

mV signal

*1: W97Re3-W75Re25 (tungsten 97% rhenium 3%-tungsten 75% rhenium 25%)
The abbreviation of ASTM E988.
*2: W95Re5-W74Re26 (tungsten 95% rhenium 5%-tungsten 74% rhenium 26%)
The abbreviation of ASTM E988.

*1
*2

RTD input

mV input

9.1.4 Direction of Output Action

When output 1 and output 2 are analog outputs, the outputs
can be reversed. Set the direction of output action in D38:
OUT1 DR (output 1) and in D39: OUT2 DR (output 2). Select
REVERSE for reverse action and DIRECT for direct action.

9.1.5 Wiring Resistance Correction

When an error occurs due to the influence of the input wiring
resistance, the wiring resistance can be corrected automati­cally. Apply a stable input as shown below and select EX-

Operation guaranteed range

-200 to 1200 °C

-200 to 350 °C

-200 to 800 °C
0 to 750 °C
0 to 1600 °C
0 to 1600 °C
600 to 1700 °C

-200 to 1200 °C
0 to 2000 °C
0 to 2000 °C

-200 to 660 °C

-200 to 660 °C

-200 to 510 °C

-200 to 649 °C

-10 to 100 mV DC

ECUTE in P01: WIRING R. The correction is also required
when the direction of burnout action is changed from UP
(DOWN) to DOWN (UP) or the wiring for input is changed.

Thermocouple Input

VJU7

Short-circuit at the cable end.

VJ77

or

JHT200

RTD Input

VJ77

VJU7

Short-circuit at the cable end.

or

JHT200

mV Input

Voltage

generator

VJU7

Two signal lines are connected to
the same terminal of one side.

VJ77

or

JHT200

9.2 Settings Related to Communication
Function

Set the following parameters when the communication func­tion is specified for the output 2.
For more information on communication functions, see the
user’s manual for VJ Series Communication Functions (IM
77J01J11-01E).

9.2.1 Communication Protocol

Select the communication protocol from among PCLINK,
PCLINK WITH SUM, MODBUS ASCII, MODBUS RTU and
LADDER in F01: PROTOCOL.

9.2.2 Communication Address

Set the address number of the converter numerically in a
range of 1 to 99 in F02: ADDRESS.

9.2.3 Baud Rate

Select the baud rate from among 1200, 2400, 4800 and
9600 bps in F03: BAUD RATE.

9.2.4 Parity

Select the parity from among NONE, EVEN and ODD in
F04: PARITY.

9.2.5 Data Length

Select the data length from among 7 bits and 8 bits in F05:
DATA LEN.

9.2.6 Stop Bit

Select the stop bit from among 1 bit and 2 bits in F06: STOP
BIT.

9.2.7 Decimal Point Position

Number of decimals of input value (setting of D register
[D0003]) can be set. Select the number of decimals from
among 0 to 5 in F07: INPUT DEC PT.

All Rights Reserved. Copyright © 1999, Yokogawa M&C Corporation IM 77J01U07-01E 4th Edition Feb. 09, 2007-00

9.3 Settings Related to Alarm Output

Set the following parameters when the alarm output is speci­fied for the output 2.

9.3.1 Alarm Setpoint

Set the alarm-1 setpoint and alarm-2 setpoint numerically in
E01: SET POINT1 and E02: SET POINT2 for thermocouple
input and RTD input or in E03: SET POINT1 and E04: SET
POINT2 for mV input. Set them in [°C] for temperature input
or in [%] for mV input.

● Setting range: 0 to 100% of input range

● Setting resolution: 0.1°C (for thermocouple input and

RTD input), 0.1% (for mV input)

9.3.2 Direction of Alarm Action

Select the direction of alarm-1 action and that of alarm-2 ac­tion from among HIGH ALM (high-limit alarm) and LOW ALM
(low-limit alarm) in E05: ALM1 ACTION and E06: ALM2 AC­TION.

● To activate alarm status when input signal ⱖ alarm
setpoint, select HIGH ALM.

● To activate alarm status when input signal ⱕ alarm
setpoint, select LOW ALM.

9.3.3 Hysteresis

Set the alarm-1 hysteresis and alarm-2 hysteresis numeri­cally in E07: HYSTERESIS1 and E08: HYSTERESIS2 for
thermocouple input and RTD input or in E09: HYSTER­ESIS1 and E10: HYSTERESIS2 for mV input.
Hysteresis is a value added to the alarm setpoint in order for
an alarm status to be released (to normal) after the alarm
status has been activated. The alarm status will be released
in the following conditions, depending on the direction of
alarm action.
* When HIGH ALM (high-limit alarm) is set: Alarm is re-

leased when input signal < (alarm setpoint - hysteresis).

* When LOW ALM (low-limit alarm) is set: Alarm is re-

leased when input signal > (alarm setpoint + hysteresis).

Set them in [°C] for temperature input or in [%] for mV input.

● Setting range: 0 to 100% of input range

● Setting resolution: 0.1°C (for thermocouple input and

RTD input), 0.1% (for mV input)

9.3.4 Alarm ON Delay and Alarm OFF Delay

Set the alarm-1 ON delay and alarm-2 ON delay numerically
in E11: ON DELAY1 and E12: ON DELAY2. Set the alarm-1
OFF delay and alarm-2 OFF delay numerically in E13: OFF
DELAY1 and E14: OFF DELAY2.
An alarm ON delay is a delay time from the establishment of
alarm conditions to its output; an alarm OFF delay is a delay
time from the establishment of return-to-normal conditions to
its output.

● Setting range: 0 to 999 seconds

● Setting resolution:

is to be added to the set time to prevent wrong opera­tion.)

For example, when an alarm ON delay is set to 1 second,
alarm output is generated if alarm status continues for 1 sec­ond or more after the input value exceeds the alarm
setpoint. Furthermore, when an alarm OFF delay is set to 2
seconds, alarm output is released if normal condition contin­ues for 2 seconds or more after the input value has returned
to normal from the alarm status.

9.3.5 Direction of Relay Action

Select the direction of relay energizing in alarm-1 normal
condition and alarm-2 normal condition from among NRM
DE-ENERGIZED (de-energized under normal condition) and
NRM ENERGIZED (energized under normal condition) in
E15: RL1 ACTION and E16: RL2 ACTION.

1 second (However, about 0.2 second

5

IM 77J01U07-01E 4th Edition Feb. 09, 2007-00

10. DESCRIPTION OF ALARM ACTIONS

This chapter describes examples of alarm actions under the following conditions.

6

Item

Direction of alarm action

Parameter Setpoint Parameter Setpoint

E05 : ALM1 ACTION High-limit alarm E06 : ALM2 ACTION Low-limit alarm

Alarm 1 Alarm 2

Alarm setting E03 : SET POINT1 80% E04 : SET POINT2 15%
Hysteresis E09 : HYSTERESIS1 10% E10 : HYSTERESIS2 5%
Alarm ON delay E11 : ON DELAY1 1 sec E12 : ON DELAY2 3 sec
Alarm OFF delay E13 : OFF DELAY1 2 sec E14 : OFF DELAY2 4 sec
Description of
alarm actions

The alarm is output if the condition where
the input value is 80% or more of high­limit alarm continues for 1 second or
more.
After the alarm is output, when the
condition where the input value is less
than 70% of high-limit alarm continues for
2 seconds or more, the status returns to

The alarm is output if the condition where
the input value is 15% or less of low-limit
alarm continues for 3 seconds or more.
After the alarm is output, when the
condition where the input value is more
than 20% of low-limit alarm continues for
4 seconds or more, the status returns to
normal.

normal.

Alarm conditions established

Alarm conditions established

Normal conditions established

Normal conditions established

[1]: Alarm status does not continue for more than 1 second after the

High-limit alarm OFF

Alarm-1 OFF delay

alarm conditions are established at alarm 1.

[2]: Normal status does not continue for more than 2 seconds after the

normal conditions are established at alarm 1.

[3]: Alarm status does not continue for more than 3 seconds after the

alarm conditions are established at alarm 2.

[4]: Normal status does not continue for more than 4 seconds after the

normal conditions are established at alarm 2.

Alarm-1 setpoint (80%)

Alarm-1 hysteresis (10%)

Low-limit alarm ON

Alarm conditions

established

Alarm-2 ON delay

Alarm conditions

established

Normal conditions

established

Normal conditions

established

Low-limit alarm OFF

Alarm-2 OFF delay

[%]

100

80

60

High-limit alarm ON

[1] [2]

1 sec

Alarm-1 ON delay

2 sec

40

20
15

Alarm-1 action

Alarm-2 action

Alarm-2 hysteresis (5%)

0

Normal

Alarm-2 setpoint (15%)

Alarm

Normal Alarm

[3]

3 sec 4 sec

Normal

[4]

Elapsed time

1 sec

Normal

All Rights Reserved. Copyright © 1999, Yokogawa M&C Corporation IM 77J01U07-01E 4th Edition Feb. 09, 2007-00

11. LIST OF PARAMETERS

7

No. Item Display
01 Model MODEL
02 Tag No. TAG NO
03 Self-check result SELF CHK

Display items

A Display 1 DISPLAY1
A01 Input value INPUT1
A05 Output value 1 OUTPUT1
A06 Output value 2 OUTPUT2
A07 Alarm-1 status ALM1 STATUS
A08 Alarm-2 status ALM2 STATUS
A54 Status STATUS (*1)
A56 Rev No. REV NO
A58 Menu Rev MENU REV
A60 Self-check result SELF CHK
Setting items (*2) (*3)
D Setting (I/O) SET(I/O)
D01 Tag no.1 TAG NO.1
D02 Tag no.2 TAG NO.2
D03 Comment 1 COMMENT1
D04 Comment 2 COMMENT2
D07 Input sensor type SENSOR TYPE
D08 Thermocouple type TC TYPE
D09 RTD type RTD TYPE
D15 Unit UNIT
D17 Input hard range selection SELECT RANGE
D22 Input low range INPUT1 L_RNG
D23 Input high range INPUT1 H_RNG
D30 Burnout BURN OUT
D38 Direction of output-1 action OUT1 DR
D39 Direction of output-2 action OUT2 DR
D60 Self-check result SELF CHK

Adjusting items (*3)
P Adjustment ADJUST1
P01 Wiring resistance correction WIRING R
P02 Zero adjustment of input 1 ZERO ADJ1
P03 Span adjustment of input 1 SPAN ADJ1
P12 0% adjustment of output 1 OUT1 0%
P13 100% adjustment of output 1 OUT1 100%
P14 0% adjustment of output 2 OUT2 0%
P15 100% adjustment of output 2 OUT2 100%
P60 Self-check result SELF CHK

*1 : The status is displayed for service personnel to see history records.
*2 : Some items are not displayed depending on the selected input sensor type or output-2 specification.
*3 : To call the parameter setting items D, E, F, P and Q using the JHT200 Handy Terminal, execute the following operation:

Press F1

D, E, F, P or Q key enters above.

ENTER

keys.

No. Item Display

B Display 2 DISPLAY2
B01 Input value INPUT1
B05 Output value 1 OUTPUT1
B06 Output value 2 OUTPUT2
B07 Alarm-1 status ALM1 STATUS
B08 Alarm-2 status ALM2 STATUS
B60 Self-check result SELF CHK

E Setting (alarm output) SET(ALM)
E01 Alarm-1 setting SET POINT1
E02 Alarm-2 setting SET POINT2
E03 Alarm-1 setting SET POINT1
E04 Alarm-2 setting SET POINT2
E05 Direction of alarm-1 action ALM1 ACTION
E06 Direction of alarm-2 action ALM2 ACTION
E07 Alarm-1 hysteresis HYSTERESIS1
E08 Alarm-2 hysteresis HYSTERESIS2
E09 Alarm-1 hysteresis HYSTERESIS1
E10 Alarm-2 hysteresis HYSTERESIS2
E11 Alarm-1 ON delay setting ON DELAY1
E12 Alarm-2 ON delay setting ON DELAY2
E13 Alarm-1 OFF delay setting OFF DELAY1
E14 Alarm-2 OFF delay setting OFF DELAY2
E15 Direction of alarm-1 relay action RL1 ACTION
E16 Direction of alarm-2 relay action RL2 ACTION
E60 Self-check result SELF CHK

F Setting (communication) SET(COM)

F01 Communication protocol PROTOCOL
F02 Address ADDRESS
F03 Baud rate BAUD RATE
F04 Parity PARITY
F05 Data length DATA LEN
F06 Stop bit STOP BIT
F07 Decimal point position INPUT DEC PT
F60 Self-check result SELF CHK
Test items (*3)
Q Test TEST
Q01 ON/OFF of RJC RJC
Q02 Forced output 1 OUT1 TEST
Q03 Forced output 2 OUT2 TEST
Q04 Forced output (alarm 1) ALM1 TEST
Q05 Forced output (alarm 2) ALM2 TEST
Q60 Self-check result SELF CHK

IM 77J01U07-01E 4th Edition Feb. 09, 2007-00

12. MAINTENANCE

The product enters the operable status as soon as the power is turned on, but requires 10 to 15 minutes of warm-up to meet the
performance requirements.

12.1 Calibration Apparatus

● Calibrator (Yokogawa Meters & Instruments’ CA71 or equivalent): 1

● Temperature sensor (Yokogawa Meters & Instruments’ B9108WA or equivalent): 1

● Digital Multimeter (Yokogawa’s 7561 or equivalent): 1

● Precision resistor of 250 Ω ±0.01%, 1 W: 1

● Setting tool for adjustment (Refer to “8.2 Connecting the Setting Tools” in this manual.)

12.2 Calibration Procedure

(1) Connect the instruments as shown in Fig.12.1.

First adjust the output-1 signal and then the output-2 signal.

(2) Produce the input signal equivalent to 0, 25, 50, 75 and 100% of the input span from the calibrator. Check that the converter’s

output signals show voltages corresponding to 0, 25, 50, 75 and 100% within the rated accuracy range.
If the output signal is out of the rated accuracy range, adjust the output signal level using the VJ77 PC-based Parameters Set­ting Tool or JHT200 Handy Terminal.
Refer to the user’s manual for VJ77 PC-based Parameters Setting Tool (IM 77J01J77-01E) or for JHT200 Handy Terminal (IM
JF81-02E).

8

Fig. 12.1

Thermocouple Input

Calibrator

Temperature sensor
(B9108WA)

RTD Input

Calibrator

mV Input

Calibrator

+

1

–

3

RJC

4

A

1

B

3

B

4

+

1

–

3

3 2

56

1011

Power Supply

L+

N–

GND

Output 2

1

4

789

Analog output

2

5

R: 250 Ω precision resistor for
current output

Output 1

R

+

Digital

–

multimeter

ALM2 (NO)

2

COM

5

ALM1 (NO)

6

COM

5

Alarm 1

Calibrator

Alarm 2

Calibrator

Analog output

+

7

9

10

11

8

R: 250 Ω precision resistor for
current output

R

Digital

–

multimeter

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