Fluid Components International MT86_MT86HT Manual Troubleshooting - Manual (Page 13)

Doc. No. 003162 Rev. F 5 - 13 Models MT86, MT86HT
CHAPTER 5 - TROUBLESHOOTING FLUID COMPONENTS INTL
6. Return switch SW4 to the OP (OPerate) position.
If additional technical assistance is needed, contact the customer service department at 1 (800) 854-1993.
Repair
There are no field-repairable items at the component level other than fuses.
Note: Any unauthorized repairs that are done at the component level will void the warranty.
Contact the authorized FCI field representative (see the list of regional territories and the respective agents) or the
factory (see the telephone and FAX numbers at the front of this manual) to determine the best course of action.
EPROM Replacement Procedure
1. Turn the operating power OFF.
Caution: EPROMS are Electro-static Sensitive Devices (ESD). Use approved ESD procedures.
2. On the control board, remove the original EPROM from its socket (U14).
3. Store the original EPROM on Electro-Static safe foam or in an Electro-Static safe bag for possible future use.
4. Do not remove the new EPROM from its chip carrier. Install the chip carrier and EPROM as a single unit into
the control board. The serial number on the new EPROM MUST match the serial number on the control board.
5. Verify the following switch positions on the control board:
SW1-1 open
SW1-2 open
SW1-3 open
SW1-4 open if temp. comp. is used. closed if temp. comp. not used
SW2
set on the position that corresponds to the maximum number of sensing points
SW4 OP (OPerate) position
6. If the flowmeter has a local display and the new EPROM changes the calibration range, then the display will
need to be re-spanned to the new range.
7. Turn the operating power ON, and then allow five minutes for the flowmeter to stabilize.
8. Make a new Delta "R" Data Sheet for each flow element when the flowmeter is operating correctly. The new
sheets will be useful when future calibration and verification checks are made.
General Circuit Board Replacement Procedure
For matching equipment, 100 ohm or 1000 ohm, see Table 5-8. Table 5-8 covers the control board and input boards.
The power supply, output board, and display are interchangeable regardless of flowmeter type.
The control board is interchangeable for same type call-out. In other words, a control board for a 1000 ohm sensing
element is interchangeable with another control board for a 1000 ohm sensing element, adjustments may be needed.