LTH Electronics MXD75 User Manual

Faults
MXD70 Electrodeless Conductivity
Setup and Operating Guide
- 53 -
Faults
The Temperature Reading Is Incorrect
 Check that the temperature sensor is correctly attached. (See Temperature Sensor Connections,
page 12)
 Check that the temperature sensor type is correctly selected in the Channel Setup menu (See Page
17)
 Where practical check the temperature sensor resistance against the table in Temperature Data,
page 31.
Current Output is Incorrect or Noisy
 Check that the maximum load for the current loop has not been exceeded. (750).
 Check that the terminals have been wired correctly.
 Check that the cable screen is attached to Earth at one end and that the cable does not pass too
close to a power cable.
 Check that he current output has been configured properly.
Relays Appear to Malfunction
 Check that the unit is “On-Line” (Page 14)
 Check that the set point configuration is correct (see Setpoints, Current Outputs and Digital Input
configuration guide)
 If the relays are vibrating or “chattering” as they pass the set point, check the hysteresis setting and
increase if necessary.
 Ensure that the relays are connected properly (see MXD73 Installation guide or MXD75 Installation
guide) and that the voltage/current levels are not exceeding
5A @ 30V DC or 5A @ 250V AC.
 Check that the instrument input cables are not picking up excessive noise.
Guarantee and Service
Products manufactured by LTH Electronics Ltd are guaranteed against faulty workmanship and
materials for a period of three years from the date of despatch, except for finished goods not of LTH
manufacture, which are subject to a separate agreement.
All sensors made by LTH Electronics Ltd are thoroughly tested to their published specification before
despatch. As LTH have no control over the conditions in which their sensors are used, no further
guarantee is given, although any complaints concerning their operation will be carefully investigated.
Goods for attention under guarantee (unless otherwise agreed) must be returned to the factory
carriage paid and, if accepted for free repair, will be returned to the customer’s address free of charge.
Arrangements can also be made for repair on site, in which case a charge may be made for the
engineer’s time and expenses.
If any services other than those covered by the guarantee are required, please contact LTH direct.
N.B. Overseas users should contact their LTH nominated representative. Special arrangements will be
made in individual cases for goods returned from overseas.

LTH Electronics MXD75 Specifications

General

Brand	LTH Electronics
Model	MXD75
Category	Monitor
Language	English