Hardy HI 1769-2WS - Manual (Page 12)

HI 1769-WS/HI 1769-2WS WEIGH SCALE MODULE
1-4
detects the quantity of load sensors in the system. All
calibrations can be performed via ladder logic.
IT
®
I NTEGRATED T ECHNICIAN
™
is a system diagnostics
utility. For full functionality the weigh system should
include an HI 215IT series junction box. Full IT func-
tionality allows the operator to rapidly troubleshoot a
weighing system.
Digital Volt Meter
(DVM) - Optional Requires the HI 215IT Series Junction Box to monitor
both and mV/V readings for the system and per indi-
vidual load sensor. Once a problem is detected by the
operator the DVM readings help the operator to iso-
late the faulty component. Further, the DVM readings
can be used to level a system and to make corner
adjustments to platform scales. Accuracy is +/- 2% or
better of full scale.
NOTE: If you do not have the HI 215IT Junction Box con-
nected to the module, the mV/V reading as displayed
is the total for all the load cells on the system.
Rate of Change The ROC option measures and displays the rate at
which a material enters or is dispensed from the scale
over a period of time. ROC data uses a 100-entry reg-
ister. New weight values are written to the register at
the rate of 1/100th of the time base. The first register
is subtracted from the 101st Register, which is one
time base older than the first register. The ROC is
reported in units per minute. A time base of discrete
values is selectable from 1 to 1800 sec
Return to Zero
Test - Optional Requires the HI 215IT Series Junction Box to monitor
individual load sensors. This test compares the origi-
nal voltage reading (saved at calibration) against the
current voltage reading of an empty vessel. The test
checks for damaged load sensors due to electrical zero
shift or abnormal mechanical forces that cause bind-
ing on one or all of the load sensors in the system.
Weighing System
Tests - Optional Requires the HI 215IT Series Junction Box for full
utilization. This test is used to diagnose drifting or
unstable weight reading problems. The Weighing Sys-
tem Test does the following: