Laurel Electronics LAUREATE SERIES 2 DIGITAL PANEL METER User Manual

Page 20

12. LOAD CELL & MICROVOLT INPUT

Notes

1. See Section 19 to select 10V excitation.

2. Jumpers are 2.5 mm (0.1 in).

SCALE & OFFSET SETUP

For DC microvolt meters, a scale factor of 1 and an offset of 0 are used for direct readings in
microvolts or millivolts. Decimal point selection does not affect the displayed digits. For
example, 20 mV can be displayed as 20.000 mV or 20000 µV. The decimal point is set
separately.

For load cell applications, scaling is normally set up from the front panel using the and
keys, but can also be set up via RS232/485 using special PC-compatible setup software
(available at no charge). The meter allows three scaling methods to be selected: 1). Manual
scale and offset, 2) Coordinates of 2 points, and 3) Reading coordinates of 2 points. Please
see the Glossary for an explanation of each method.

The Load Cell and Microvolt meters utilize the load cell signal conditioner board, which offers
sensitivity to ±20 mV full scale and 4 or 6-wire load cell connection. This board needs to be
configured via jumpers for the desired voltage range. All signal ranges are factory calibrated
with calibration factors stored in EEPROM. The meter software recognizes the board and will
bring up the appropriate menu items for it; however, it does not recognize the jumper settings.
Please see further manual sections for setup of the following features: relay output (16),
analog output (17), communications (18), and transducer excitation output (19).

RANGE SELECTION VIA JUMPERS

Ranges & Display with
Scale Factor = 1

Input

Jumpers

Full scale
display

±20 mV
±50 mV

±100 mV
±250 mV
±500 mV

e
a
b

±20000
±50000
±10000
±25000
±50000