Fluid Components International ST98_ST98L Guide - Manual (Page 8)

Mode ST98 Flowmeter 8 Doc. No. 06EN003310 Rev. -
FLUID COMPONENTS INTL INSTALLATION, OPERATION AND TROUBLESHOOTING GUIDE
If there are still problems with the instrument, see the Troubleshooting Section in the ST98 Manual,
Document 06EN003291. To acquire a manual call FCI Customer Service at 1 (800) 854-1993.
Open the bottom enclosure lid to expose the customer connection board.
Connect the FC88 or computer to the RS-232 Jack (P1).
Set the FC88 communicator or computer to display the T mode (normal operation).
Turn on the NAMUR fault flag, menu X (Press X on the FC88 or computer and follow the menu path).
Compare the fault indication from the T mode with table below. Follow the instructions provided in the table.
Indicated Faults Possible Causes
Power is not applied to the instrument. Power is not correctly applied to the customer
connection board. A green LED lights when AC power is applied. It is on the back
side of the customer circuit board behind P1 (it is hard to see). If it is blinking remove
power and contact customer service.
Press [P] [ENTER] on the FC88 to reset . If no response connect it to another ST98 (if
present) to verify operation. Replace the cable between the ST98 and FC88. If no
operation contact customer service.
Verify the NAMUR option is activated [X] [ENTER]. If no fault shown, verify the heater
is on [H] [ENTER]. If no fault is shown, refer to the ST98 Manual, Document 06EN003291.
Go to the Instrument Output Check procedure in the ST98 Manual,
Document Number 06EN003291.
Sensing element wires may be disconnected, shorted or connected to the wrong place.
The active or reference RTD is open or shorted. See the ST98 Manual, Document
Number 06EN003291 for further troubleshooting.
The process temp exceeded the max. temperature rating of the flow element (350°F).
Verify the process temp. If the temp is over 350°F, damage to the sensor element will
occur. Contact customer service.
Process temp exceeded the min. temp of the sensor element. If the temp. is under -50°F,
damage to the flow element occures. Contact customer service.
The sensor element's heater exceeded the max resistance (about 170 ohms) or is
disconnected. This limit includes the cable resistance in remote installations. The heater
fault flag is on when the heater is turned off (using the menu key [H] [ENTER]). Check
wiring and sensor resistance.
The sensor element's heater exceeded the minimum resistance (approximately 90 ohms)
or it is shorted. This limit includes the cable resistance on remote installation. The heater
fault flag comes on in cases when the heater is turned off (using the menu key [H]
[ENTER]). Check the wiring and the sensor resistance.
Nothing displayed on the FC88
or the optional display.
No display on the FC88 no display
on the optional display.
No display on the FC88. There is a display
on the optional LCD display.
No fault indicated. Output mA or Vout
operates correctly.
No fault indicated but the 4-20 mA
(or Voltage) output is not transmitting.
Sensor Error.
OverTemp Head!!
UnderTemp Head!!
Open Heater!!
Shorted Heater!!
Step 6. Troubleshooting
Step 5. Operation
Before applying power to the instrument, be sure it is connected properly and that the covers are closed.
Apply power to the instrument. Wait 10 minutes for the instrument to stabilize. During this period the instrument may
indicate a high flow condition. After stabilization, the instrument displays an initialization sequence followed by normal
operation information.
Notice of Proprietary Rights
This document contains confidential technical data, including trade secrets and proprietary information which are the property of Fluid Components
Intl (FCI). Disclosure of this data to you is expressly conditioned upon your assent that its use is limited to use within your company only (and does
not include manufacture or processing uses). Any other use is strictly prohibited without the prior written consent of FCI.
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