Hardy HI 1769-FC - Manual (Page 71)

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Chapter 7
To determine if an instrument or cabling problem exists, verify the basic operation of the
system by performing the following system checks.
Weight and Voltage Test
The Weight and Voltage tests are used to diagnose a weighing system and, if certain
types of problems are indicated, determine their source. It provides the total scale input to
the instrument, such as mV/V and Weight in the units selected (i.e. lbs, kg, oz, g).
Running the IT test will show the weight and voltage results for each load sensor,
including the following values:
Weight: Weight value recorded on the sensor
mV/V: The mV/V reading is sufficient to balance the corners of your scale or vessel.
These readings allow you to determine if the problem is in the instrument (internal) or in
a load sensor(s) (external). The normal specification range for the Rate Controller is 0-15
mV. Readings outside this range (15.5 mV, 3.1 mV/V Maximum or any negative values),
indicate an external problem. (most likely improper wiring).
When you check the results, if all the load sensors read 0.00, something is probably
wrong between the HI 1769-FC and the HI 215IT junction box, e.g., the cable may be
disconnected. Something could also be causing the box to not transmit the readings to the
HI 1769-FC.
If you get no reading for one or possibly two or more load sensors (e.g., sensor 3 reads
0.00 or the reading is larger or smaller than it should be) and you know that the sensors
are connected to the junction box, either the load sensor is malfunctioning or its cable to
the junction box is loose or incorrectly wired.
General Policies and Information
Hardy Process Solutions provides world-wide support for its products. The following
paragraphs describe Hardy's customer support services and equipment warranty. When
returning a product, call the Technical Service Department listed below for a Return
Authorization Number. You will need to provide your company name, address, telephone
number, equipment model number, S/N, and a brief description of the problem.
NOTE For all non-warranty repairs a purchase order or credit card information is required.
You can also go to the Hardy web site and request a Return Authorization number. An
RA# will be e-mailed to you.
http://www.hardysolutions.com/service/repair.php
Warranty
A warranty problem may be handled by returning the product to the factory for repair or
replacement under warranty. In the event you experience a problem with this instrument
contact your local Hardy Representative or the Hardy Process Solutions Service Center to
determine if the problem is covered under warranty.
Web Address: http://www.hardysolutions.com/Service/term.php
Ordering Replacement Parts
Contact the Hardy Sales Department to order replacement parts and option boards. Have
your equipment model number and serial number ready.
Note System Support (Requires Purchase Order or Credit Card)
Technical Service is provided as follows:
 New system start-up: Ensure that the installation is checked and correct;
instruments are calibrated, and operators trained.
 Service: Engineers are trained and qualified to provide on-site installation,
calibration, and maintenance.