Yokogawa Y800 - PLUS Universal Digital Meter & Counter

The 800Plus Universal Digital Meter is a versatile, cost effective solution to a wide variety of monitoring and control applications. Frequency Rate Total Timer Basic Counter Frequency, rate, total (up or down), period (2 channels simultaneously), time interval A to B, square root of rate. Rate, square root of rate (differential pressure or target type flow meters). Position or length from encoders. Accepts differential or single-ended inputs. 1x, 2x, or 4x inputs. Z channel inputs. Type: FR, VF, QD Extended Counter Basic counter plus rate & total simultaneously, linearize non-linear inputs, ratio, draw, arithmetic function(A * B, A / B, A + B, A - B), phase angle, stop watch, up/down counting, batch counting. Basic counter plus rate and total simultaneously, linearize non-linear inputs, batch counting, 1 / rate (time). Extended counter not required for QD applications.

Standard Counter Version:
 

• The Y800Plus dual-channel frequency, rate & period meter is a basic operating mode of the Y800Plus counter with the FR signal conditioner board. It can display frequency from 0.005 Hz to 1 MHz, rate in engineering units, and period (inverse of frequency). The normal displayed value can range up to 999,999 counts. Above that level, the display will flash and go into four-digit XXXXEX scientific notation. Each channel (A or B) may be independently scaled for frequency, rate or period. The displayed channel is selected via a front panel push-button. Examples of applications are the accurate display of AC line frequency, RPM, speed from proximity switch inputs, and flow from turbine flow meter inputs.
• Fast, high resolution measurements. The Y800Plus counter determines frequency by timing an integral number of periods over a specified gate time, and then taking the inverse of period. Rate is obtained by multiplying the input by a scale factor. The inverse period approach allows greater accuracy and faster update times than conventional meters which count signal pulses over a time interval. AC line frequency may be accurately measured to 50.0000 or 60.0000 Hz in a few line cycles. 1000 Hz signals may be measured to 0.01 Hz resolu-tion at up to 25 readings per second. Fast response is ideal for alarm and control applications.
• For noise reduction, a count by 10 or 100 feature with rounding is selectable. Variations in the displayed reading can also be reduced by selecting a longer gate time. An adaptive digital filter is selectable to reduce variations due to noise while rapidly responding to actual changes in the signal.

Extended Counter Version:
 

• Rate and total simultaneously. One channel can display total while the other displays rate. The selection for either channel is via a front panel pushbutton. This mode is ideal for flow applications when the same signal is applied to both channels. 
• Custom curve linearization. Exceptionally accurate custom curve linearization allows linearization of the low end of turbine flowmeters. For setup, up to 180 data points can be input into a spreadsheet or text file by the user. The computer then calculates nonlinear segments, which are downloaded into the meter via RS-232. The Extended version allows linearized rates to be totalized.
• Arithmetic functions. The Extended counter makes arith-metic functions available, namely A+B, A-B, AxB, A/B and A/B-1 (draw). For example, A+B allows two input flows to be summed for total flow, while A-B allows outflow to be subtracted from inflow for net flow. If transducers with a frequency output are used, AxB allows horsepower to be displayed based measured torque and RPM, or based on force and velocity. A/B can be used for the proper mixing of ingredients, while A/B-1 (draw) is used to compare rates for stretching or tensioning.
• Inputs to the FR dual-channel signal conditioner can be proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickups, contact closures, low-level outputs from turbine flow meters down to 12 mV, and high-level AC line inputs up to 250 Vac. A built-in isolated 5, 10, or 24 Vdc excitation supply can power proximity switches and other sensors, thus eliminating the need for an external power supply.

Designed for system use. Optional plug-in boards include Ethernet and other serial communication boards, dual or quad relay boards, and an isolated analog output board. Y800Plus counters may be powered from 85-264 Vac or optionally from 12-32 Vac or 10-48 Vdc. The display is available with red or green LEDs. The 1/8 DIN case meets NEMA 4X (IP65) specifications from the front when panel mounted. Any setup functions and front panel keys can be locked out for simplified usage and security. A built-in isolated 5, 10, or 24 Vdc excitation supply can power transducers and eliminate the need for an external power supply. All power and signal connections are via UL / VDE / CSA rated screw clamp plugs.