Yokogawa JUXTA VJTK - Manual (Page 3)

3
IM 77J01T21-01E 2nd Edition Feb. 09, 2007
8. DESCRIPTION OF FRONT PANEL AND
CONNECTION OF SETTING TOOLS
8.1 Front Panel
The communications connector on the front panel is used for
setting up parameters using a PC (VJ77 PC-based Param-
eters Setting Tool) or the Handy Terminal (JHT200). The
alarm indicator lamps for alarm 1 and alarm 2 light up if an
alarm occurs.
ALM1
ALM2
Alarm indicator lamp
(for alarm 1)
Communication connector
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 communica-
tion connector of JUXTA.
JHT200
Handy Terminal
JUXTA communication cable with
5-pin connector (F9182EE)
[Comes with VJ77 and JHT200]
Modular jack conversion
adapter (E9786WH)
[Comes with VJ77]
Dedicated adapter (E9789HA)
[Comes with VJ77]
Dedicated cable (E9786WK)
[Comes with VJ77]
PC with the
VJ77 installed
Fig. 8.2 Connecting the Setting Tools
Note: The modular jack conversion adapter does not
come with the JHT200 Handy Terminal.
It is sold separately.
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).
9.1 Settings Related to Input
9.1.1 Input Type and Temperature Unit
Select the thermocouple type to use from among K, T, E, J,
R, S, B, N, W3 and W5 in D08: TC TYPE.
W3: W97Re3-W75Re25 (tungsten 97% rhenium 3%-
tungsten 75% rhenium 25%)
The abbreviation of ASTM E988 Standard.
W5: W95Re5-W74Re26 (tungsten 95% rhenium 5%-
tungsten 74% rhenium 26%)
The abbreviation of ASTM E988 Standard.
Select the temperature unit to use in D15: UNIT.
9.1.2 Input Hard Range
Select the input hard range from among AUTO, MIDDLE
and LOW in D17: SELECT RANGE.
● AUTO: Sets the most appropriate input hard range auto-
matically with respect to the input range to be set.
● MIDDLE: For a span of 27.5 mV or more in an input
range of -10 to +100 mV DC converted into
thermoelectromotive force
● LOW: For a span of 10 mV or more in an input range of
-2.5 to +25 mV DC converted into thermoelectromotive
force
NOTE
The conditions for the input hard range (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 acuracy limitations, see the
general specifications of VJTK (GS 77J01T21-01E).
9.1.3 Input Range
Set the 0% value of input range in D22: INPUT1 L_RANGE
and the 100% value of input range in D23: INPUT1
H_RANGE numerically within the specified range.
Type K (CA)
Type T (CC)
Type E (CRC)
Type J (IC)
Type R Type S
Type B
Type N
Type W3
Type W5 -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
Input type Operation guaranteed range Input type Operation guaranteed range
9.1.4 Burnout
Select the direction of burnout action from among UP,
DOWN and OFF in D30: BURN OUT.
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 automati-
cally. Apply a stable input as shown below and select EX-
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.
VJTK
VJ77
or
JHT200
Short-circuit at the cable end.
9.2 Settings Related to Alarm Output
9.2.1 Alarm Setpoint
Set the alarm setpoints of alarm 1 and alarm 2 in E01: SET
POINT1 and E02: SET POINT2 numerically.
● Setting range: 0 to 100% of input range
● Setting resolution: 0.1 ° C
9.2.2 Direction of Alarm Action
Select the direction of alarm-1 action and that of alarm-2 ac-
tion from among HIGH ALM (high-limit alarm) and LOW ALM
(low-limit alarm) in E05: ALM1 ACTION and E06: ALM2 AC-
TION.
● To activate alarm status when input signal Ն alarm
setpoint, select HIGH ALM.
● To activate alarm status when input signal Յ alarm
setpoint, select LOW ALM.