Toshiba Electromagnetic Flowmeter Converter TIC-LF232A - Manual (Page 6)

TIC-LF232A
6
Wiring Precautions
(1)Be sure to use thick walled steel conduit (22mm)
for signal and excitation cable wiring between the
detector and converter. Use flexible conduit at the
cable outlets of the detector and converter.
(2) Connect the grounding wire (IV wire 5.5mm² or
more) to a good earth ground (100 Ω or less ground
resistance). Make the wire as short as possible. Do
not use a common ground shared with other
equipment where earth current may flow. An
independent earth ground is recommended.
(3) The allowable cable lengths between the detector
and converter for the separate type flowmeter
depend on the electrical conductivity of the object
fluid. See Figure 4 below.
(4) Digital output 1, digital output 2 to 4 , digital output
1 to 2 are insulated mutually.
導電率〔μS/cm〕
②
3
5
10
20
30
50
100
200
300
5 3
ケー
ブル許容
長
さ
〔m〕
10 20 30 50 100 200
①
LF130 LF131 LF150
LF470
Figure 4. Electrical Conductivity and Cable length
About establishment environment
Do not store or install the flowmeter:
• Where there is direct sunlight.
• Where excessive vibration or mechanical shock
occurs.
• Where high temperature or high humidity
conditions exist.
• Places where corrosive atmospheres exist.
• Places submerged under water.
• Place where there is sloped floor. To put the
flowmeter temporarily on the floor, place it
carefully with something, such as stopper, to
support it so that the flowmeter will not topple over.
In areas like the following, there may be the case that
infrared switches do not function correctly. (If these
are unavoidable, use an appropriate cover.)
(1) Where unit (operation panel) is exposed to direct
sunlight, reflection of light onto window pane and
diffused light reflection.
(2) Where smoke and steam may occur.
(3) Where exposed to direct snow, ice or mud.
Ordering Information
1. When ordering the LF232 converter, refer to
Tables 1 (Type Specification Code).
An entry must be made for each of the columns in
each of these tables.
2. Measuring range
3. I/O function specifications.
4. Ordering scope:
Actual flow calibration data: (required or not)
5. Specification of combined detector
6. Other scope:
Specification other than standard items.
Consult a Toshiba representative before ordering. (1)When combined with LF150.
(2)When combined with LF470.
Conductivity (µS/cm)
Allowable
cab
le
length
(m)