Crystal MultiCal BAR/PSI - Manual

PN: 1763 Rev A, 4/2004
Page 1 of 7
C R Y S T A L
engineering corporation
MultiCal
bar/PSI Pressure Module
PN: 1527, 206 bar/ 3000 PSI
INSTRUCTION SHEET
Introduction
The MulitCal™pressure modules can be used to measure almost any type of pneumatic
or hydraulic pressures, up to
3000 PSIG. It can also be used to
measure vacuum..
The module does not have a display.
Instead, the MultiCal converts
pressure (or vacuum) to milliVots.
The module must be used with
a device capable of measuring
milliVolts DC, such as a digital
multimeter (DMM).
The MultiCal is calibrated to convert
pressure units (bar or PSI) to 1 mV per pressure
unit. Vacuum readings will of course be negative.
Pressure is measured by connecting your pressure source to the 1 /
8
” female NPT fitting
of the pressure transducer. Any gas or liquid compatible with 316 stainless steel may be
applied to the module as the pressure source.
The three-position switch acts as a power switch as well as selecting inches PSI or bar
scaling for the output. Also, the OFF position allows you to read the battery condition via the
external multimeter.
The module performs best when used with high accuracy multimeters. We recommend any
of the following meter:
Fluke 70 series, 80 series, Model 45
Any meter with 10MΩ or greater input impedance and 4mm banana jacks on 3/4” centers.
Typical uses. for the module are to calibrate pressure gauges and pressure transmitters.
When used with a high performance multimeter, the pressure adapter becomes more
than just a “digital pressure gauge.” For example, use the datalogging features built-in to
the Fluke 87 and you’ll have a system that can measure and record peak (high) pressures,
peak low and average pressures of varying or unstable pressure source.
L1B